#help-with-linux-sbcs

1 messages · Page 8 of 1

north mantle
#

hmm, google is giving me two possibles (without knowing more context or having it fail on mine) - a realtek driver update being needed (which is always a good thing to check I guess?) and also trouble with the USB nic having issues when connected to a HUB that doesn't fully support it
The driver bits all pointed to the NIC never getting into full-duplex mode, so that may be a red herring
The USB hub issue seems more promising - you may want to read this thread to see if it matches your seen behaviours
https://forums.raspberrypi.com/viewtopic.php?t=359625

snow timber
#

that does look like the issue and will see if it "works" moving the usb nic to usb2.0, but the "fix" mentioned looks to be for raspberry pi os (rpi-update not installed or found from Ubuntu 23.10) 😦

#

Connectivity seems to work via either onboard nic or usb3 (1gb) nic, but usb nic disappears during a file copy across it (so not sure if it's nic compatibility or os and new pi5 chip handling)

north mantle
#

yea, that's why I was leaning towards the referenced github issue - seems to be a lower level driver issue with some hubs

#

very annoying to debug that's for dang sure

snow timber
#

re-watching Geerling's video on the pi5 (to see if wifi goes through the rp1 chip? ) maybe see if it's just able to overload bus with usb3 speeds or ?

north mantle
#

yea, his channel may be a good place to drop a question - he has amazing hardware notes on using/abusing Pis for use

snow timber
#

I seems at least the 1gb onboard nic, usb3 and usb2 do

junior edge
#

So Im trying to use CircuitPython with a Pi3 and some waveshare 64x32 led panel, running their demo code, and it starts to complain about the displayio module. I believe its installed, just confused why its wining to me since it seems like its some weird issue witht he displayio module

image.png 📎 code.py
junior edge
#

ok so apparantly its some issue due to me using python3.9 and not python 3.10

zenith crystal
#

i would recommend checking out the newest learn guide for setting up blinka -- quite a bit has changed especially if you're using bookworm

junior edge
#

I'm not using bookworm. But I restarted to ensure I followed the guide, and manually installed python 3.10, but now for some reason I keep running into issues of just finding which libraries I need to install. Is there a script that automatically installs the recommended libararies for circuitpython?

junior edge
#

ok so is there a chance that if you initially plugged in a waveshare 64x32 LED matrix panel directly to the GPIO of a rpi3 incorrectly that it can break the panel? Since mine is not turning on when properly on a matrix adapter board thingy

#

The only time I've had this panel actually run was awhile ago before I got the bonnet and I got the leds lit up In a strange 20 pixel horizontal line of random colors, where I quickly unplugged as it got really hot

junior edge
#

ok nvm, I think my problem was that I didnt have my code setup properly for the cheap offbrand hat I bought online

junior edge
#

nvm that nvm the LED panel is correctly setup in code, I am utterly and entirely confused why the LED panel refuses to show anything although everything is wired correctly

pale pewter
#

Has rfkill always been active/enabled on the raspberry pi OS? Or has something changed recently? I've never noticed its alert before.

pliant cypress
junior edge
#

well so far I've gotten a small line of green leds to appear at the bottom right. I think its a power issue as I've been having everything plugged in to a USB bank that is plugged directly into my pc, but the ports are set purely to energy output

#

but the ports output 12V which should be more than enough for both the LED panel and the pi

pliant cypress
#

oof, sorry to hear that

#

Im still stuck on the libraries not working
pretty sure something is broken, as this didnt happen before

#

I am currently building python 3.11 on my zero 2 w, here's to hoping that fixes it/actually completes

zenith crystal
placid whale
#

Hi, has anyone tried does Adafruit_CircuitPython_NeoPixel_SPI work with Blinka in Raspberry Pi?

#

I was thinking would this be a solution to run Neopixels without sudo.

steady rose
placid whale
steady rose
# placid whale Thanks! I'll try this.

ping me if it doesn't work. that guide is old enough i'm curious if it still works ok with latest hardware, os, etc. it worked at time of guide writing. 🙂

placid whale
steady rose
# placid whale Ok. I'll do that!

also - neopixel data pin needs to be MOSI on the pi...not sure if guide makes that obvious. it can't be just any digital pin, since it relies on the hardware spi peripheral.

placid whale
#

Yes, for me that was quite obvious.

pale pewter
# zenith crystal what alert?

It's part of the login message when I make an ssh connection to the Rpi:

'Wi-Fi is currently blocked by rfkill.
Use raspi-config to set the country before use.'

ruby night
#

I have never seen that alert...but I always set the WiFi Country for a new board via the Raspberry Pi Imager before loading RaspiOS to it.

#

some googling of "rfkill raspberry pi" shows me what I have been missing! Who knew 😉 I only use wifi for my Pi's so I've alwasy configured the WiFI SSID and Country code before using them. I never even knew about rfkill.

pale pewter
#

Yeah. Turns out to be a nothing-burger 'cause this pi is attached via ethernet. I did try going into raspi-config to set the country code and wifi info, but they didn't stick. Tried that twice. I'm missing something, but since I'm hard-wire attached I'm in no hurry to figure it out. #putItOnTheList

zenith crystal
#

ah -- i don't have anything hardwired any more (cuts down on the amount of wires running around the apartment for kittens to futz with and/or eat)

vocal glacier
#

Hello, is this the right forum to ask about python programming of headless Pis in Visual Studio Code?

vocal glacier
#

Nevermind, it seems I'm asking the wrong question upon googling more.

rare leaf
#

Hi all 🙂
I don't know if this is the right channel to ask since I'd first unsuccessfully posted in the *circuitpython *channel. It's definitely Pi related 🙂

Scenario: I've got a 16-bit Color 1.27" OLED display w/microSD holder from Adafruit here(https://www.adafruit.com/product/1673) and I'm trying to run it on a Pi 3 Model B pinout here(https://pinout.xyz/). I'm done with the wiring(https://learn.adafruit.com/adafruit-1-5-color-oled-breakout-board/python-wiring-and-setup) and I want to write some and run some Python code to manage the display. I know from the site that it uses the SSD1351 driver.

Problem: I can only find C versions of the driver, as well as micropy / circuitpy versions. The official Adafruit guides provide only the circuitpython version and I'm using 'regular' python. Thanks to a redditor, I managed to get everything set up finally as per this guide (https://learn.adafruit.com/circuitpython-on-raspberrypi-linux). I even managed to get the LED blinking by following the guide. Trouble now is that I have the drivers but can't find sample code to test the display and iterate off of. I've scrapped around the driver files and their sample code hasn't worked. I've even tried ChatGPT and its hasn't worked either. That's where I'm at at the moment.

Any ideas? Thanks in advance!

OLED Breakout Board - 16-bit Color 1.27" w/microSD holder

We love our black and white monochrome displays but we also like to dabble with some color now and then. Our 1.27" color OLED displays are perfect when you need a small display with ...

Adafruit Learning System
Adafruit 1.27" and 1.5" Color OLED Breakout Board

Big, bright colorful OLED

ruby night
rare leaf
placid whale
# steady rose ping me if it doesn't work. that guide is old enough i'm curious if it still wor...

Well it didn't work correctly. Tested with Rpi 4 Model B with Raspberry pi OS 64bit (Bookworm).
Neopixels turned on, but the color was white (RGB Neopixel).
I tried several things, but couldn't change the color or turn the leds off.
Test code used:
import board
import neopixel_spi
import busio

spi = busio.SPI(board.SCK_1, MOSI=board.MOSI_1, MISO=board.MISO_1)

pixels = neopixel_spi.NeoPixel_SPI(spi, 8)
pixels.fill(0xff0000)

#

I added "dtoverlay=spi1-1cs" to config.txt

#

I'll do some more testing next week.

steady rose
#

neopixel data connected to GPIO20? (SPI1 MOSI)

placid whale
#

Yes

zenith crystal
steady rose
#

can you try default SPI? (SPI0 or whatever)

#

this is working for me on a pi4:

import time
import board
import neopixel_spi as neopixel

NUM_PIXELS = 12
PIXEL_ORDER = neopixel.GRB
COLORS = (0xFF0000, 0x00FF00, 0x0000FF)
DELAY = 0.1

spi = board.SPI()

pixels = neopixel.NeoPixel_SPI(spi,
                               NUM_PIXELS,
                               pixel_order=PIXEL_ORDER,
                               auto_write=False)

while True:
    for color in COLORS:
        for i in range(NUM_PIXELS):
            pixels[i] = color
            pixels.show()
            time.sleep(DELAY)
            pixels.fill(0)
placid whale
placid whale
rare leaf
# ruby night There are examples later in the same guide <https://learn.adafruit.com/adafruit-...

so I gave it (another) go and I find that ALL the code is tailored to the TFT / LCD screens (the very first python test script is turning on the LCD backlight). I've adapted the code to my 1.27" OLED by commenting out the unnecessary import (for the others) and setting the 1351 import for my OLED. I left the rest of the code intact but I'm still not getting anything to display.

import time
import busio
import digitalio
from board import SCK, MOSI, MISO, CE0, D24, D25

from adafruit_rgb_display import color565
from adafruit_rgb_display.ssd1351 import SSD1351 # changed this to match my screen

# Configuration for CS and DC pins:
CS_PIN = CE0
DC_PIN = D25
RESET_PIN = D24
BAUDRATE = 16000000 # changed this to match my screen

# Setup SPI bus using hardware SPI:
spi = busio.SPI(clock=SCK, MOSI=MOSI, MISO=MISO)

# Create the display:
display = SSD1351(
    spi,
    rotation=90,
    width=128, # changed this to match my screen
    height=96,# changed this to match my screen
    #x_offset=53,
    y_offset=32, # changed this to match my screen
    baudrate=BAUDRATE,
    cs=digitalio.DigitalInOut(CS_PIN),
    dc=digitalio.DigitalInOut(DC_PIN),
    rst=digitalio.DigitalInOut(RESET_PIN))

# Main loop: same as above
while True:
    # Clear the display
    display.fill(0)
    # Draw a red pixel in the center.
    display.pixel(120, 160, color565(255, 0, 0))
    # Pause 2 seconds.
    time.sleep(2)
    # Clear the screen blue.
    display.fill(color565(0, 0, 255))
    # Pause 2 seconds.
    time.sleep(2)```
ruby night
#

A few questions to get started. Are there any errors reported at the REPL? Can you post a picture of your wiring? No need to tag me, I am not an expert on using these displays. Hopefully someone more knowlegeable can help.

dusk grotto
#

Hey, I have a quick question. I turned on my Pi to test something, and it had me log in, which is somewhat normal. When I entered my password, it went to black for a second and came right back to the login screen. So far, I've tried stuff online to bypass the password, and nothing has worked. I have confirmed that it is the correct password because I went into terminal mode by hitting control F2 and logged in that way, and it allowed it. Same user as login screen. Anyone got any tips?

zenith crystal
#

it sounds like there's a bad X configuration somewhere in there -- you can create a new user from the command-line and try that one to see if it's your user's config or a system config

#

the obvious question is "did you change anything recently and, if so, what was it?" 😈

dusk grotto
junior edge
#

Hey anyone know how to properly program for waveshare LED panels? I have everything configured properly, and wired properly, but Im seeing no output from the display

image.png
smoky bramble
#

ok so

#

how 2 git ARM mali gpu drivers

#

is there something like an apt install mali or something like that?

#

should i compile panfrost drivers instead?

#

(open source mali gpu drivers)

placid whale
steady rose
# 
pi@raspberrypi:~ $ uname -a
Linux raspberrypi 6.1.0-rpi4-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.54-1+rpt2 (2023-10-05) aarch64 GNU/Linux
placid whale
steady rose
#

does your uname output match above?

placid whale
#

Linux raspberrypi 6.1.0-rpi8-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.73-1+rpt1 (2024-01-25) aarch64 GNU/Linux

steady rose
#

close enough

#

might be the actual leds? what neopixel product is that?

placid whale
steady rose
#

have you tried that with something else? like an arduino board?

placid whale
#

It could be the problem. They have always worked when using regular Neopixel library.

#

I have not tested with Arduino, but with Feather they have worked fine.

steady rose
#

feather and what code?

placid whale
#

Basically example codes from Neopixel Uberguide

#

So I haven't tested with spi

#

Maybe Iäll try that next?

#

I'll

steady rose
#

might be due to minor timing differences, but in general, would expect it to work

#

spi on the feather? could try that as a way to sanity check the timing.

placid whale
#

Yep

steady rose
#

what code are you running on the pi?

placid whale
#

The code you posted. I jusset the amount of leds

#

just set

steady rose
#

yah, even if number of pixels and pixel color order were set wrong, should still get some kind of activity on the LEDs themselves

#

might not be correct color, etc., but should light up

placid whale
#

They light up, but color is white all the time.

steady rose
#

there's a way to (crudely) adjust timing in the neopixel spi library, if that's needed

placid whale
#

I'll try to test tomorrow with Feather

#

Thx

steady rose
#

i'm updating OS right now....in case maybe there's something with that

steady rose
#

@placid whale how did you get your kernel version to be 6.1.73?

steady rose
#

oh, nevermind...mine seems to have updated to that after a upgrade and reboot

(blinka) pi@raspberrypi:~ $ uname -a
Linux raspberrypi 6.1.0-rpi8-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.73-1+rpt1 (2024-01-25) aarch64 GNU/Linux
#

it's still working for my setup though

#

so doesn't appear to be a simple os / kernel / etc. issue

placid whale
#

Same code works fine with same Neopixel on Feather RP2040.

steady rose
#

do they only light up white once the code runs? indicating that at least something is getting output on MOSI

placid whale
#

All leds light up at once and won't turn off. Only way to turn them off is cutting the power.

steady rose
#

maybe there's something else using SPI?

placid whale
#

I'll check

#

No I didn't find anything from config.txt

#

This line is activated: dtparam=spi=on

#

All leds turn on when I run the code, not before that.

steady rose
#

oh, ok, that's what i meant. just something to indicate the code is at least doing something on MOSI.

#

do you happen to have a logic probe? like a saleae

placid whale
#

Ok, sorry I misunderstood

#

I'll check

steady rose
#

might even be possible to make one using the feather RP2040

placid whale
#

I don't have any kind of logic probe. I can borrow a Fluke ScopeMeter from work.

modest orbit
#

I have a new PI4 which is all set up with the imager to SD card, and working great. I'm very new to the PI. I've been knocking my head against a brick wall trying to ssh to it from Win10. I've searched and read everything there is about this subject. SSH is enabled on the PI4. All I keep getting when I enter the password (the PI's password) is permission denied, and then Permission denied (publickey,password). Also an message saying
read_passphrase: can't open /dev/tty: No such file or directory
The whole private/public key thing is new to me. I've tried all sorts of things advised online. No luck. Sorry to be such a noob. Thanks.

steady rose
#

it sounds like the pi is at least showing up on your network?

#

you were sshing to raspberrypi.local?

modest orbit
#

Yes, renamed the hostname to pi
My command is ssh pi@192.168.0.xxx then asks for password.

zenith crystal
#

that's hostname or username? typically the command is ssh username@hostname and i know the pi imager specifically asks for a user name and password (or passphrase)

steady rose
#

also -how were those set? via the config option in rpi-imager?

modest orbit
#

Hey guys, forget it - I turned off Auto Login, rebooted, and saw my user name (different than pi Hostname) , so logged into the PI OK, and then used ssh myusername@198 etc from the PC and it WORKS now. Thank you! Man am I a green new guy. 😀
I am happily running a python script on the PI 4 from my PC.

faint sparrow
#

Can the Pi5 be configured to fully power off with the "poweroff" command from Raspbian? The command shuts down Linux but does not fully power off the board. This messes with the behavior of my battery pack.

humble marsh
faint sparrow
#

The Pi and battery bank must be talking via PD or something that gets ignored if the battery is restarted

humble marsh
faint sparrow
#

The pi5 has to be physically disconnected at the pi and reconnected to get the battery powering that port, even if the battery is already on

humble marsh
#

there are power packs that do not have that behavior: let me find a post I made recently about that

#

there are some hack circuits that cycle a power pack at short intervals to keep them on, as well

faint sparrow
#

it's easy enough on my design to pop off the USB C cable though for when it needs to be powered off to save battery, it's just a weird state as I use battery packs more

#

Voltaic Systems is awesome too- I have a larger V88 or V250 around here, it's just far too big for this build

placid whale
#

Still not sure why it doesn't work on my Rpi 4

placid whale
#

Has anyone here tried Hardware Pwm with Raspberry pi 5?

#

I can't get it to work.

ornate bluff
#

are the non-wireless versions of the pi zero not produced anymore?

humble marsh
zenith crystal
#

general Pi "hat" question for those EE's out there -- if i have a hat on a Pi and the Pi will not power on, the hat is pretty well fried in some form or fashion? (the Pi does power up with a GPIO expander without issues)

broken shuttle
#

Depends on what the hat is, but chances are that it's trying to draw more than your power supply can handle (which isn't difficult with a pi).

zenith crystal
#

an i2c qwiic v2, which doesn't have external power, so yah, i think it's a deader (tbh, this was in a drawer, so...)

civic trench
#

@everyone Dear all senior circuit python dev(s), Namaste

I am a java developer, recently switched to AI Python. I am getting a very strange issue, Kindly help me with your valuable suggestions.

I have below modules

Raspberry Pi 4 B+ 8 GB
SSD1306 128x64 I2C

Requirement: I want to display GIF, PNG and Do spritesheet animation on the display with Pi 4.

I have done many tutorials from YouTube, adafruit GitHub but I can find text and statsled tutorial which I am able to do succesfully. I have tried multiple libraries but come to know CircuitPython is best, I could not find no tutorial for display gif or spritesheet. Most of the tutorials belong to Raspberry Pico but I found very less tutorials for Pi 4 still useless, they show only statled. if you can help me by providing some guidance with Pi 4 B+ and ssd1306, it will be much appreciated. I am working on a AI project

Reference - https://www.youtube.com/watch?v=YMGYbmGxhP4

Regards

YouTube
make2explore Systems
[Tutorial] Raspberry Pi Pico OLED Animations

[Tutorial] How to display Animations on OLED display

⏰ Timestamps

00:00 Start
00:57 Introduction
01:11 Circuit Diagram
01:57 What is CircuitPython
03:00 CircuitPython Website
04:00 Features of CircuitPython
05:49 How to install CircuitPython on RPi Pico
08:30 CircuitPython Development Environment
09:49 Animation Theory
11:00 What i...

▶ Play video
rotund pivot
#

@civic trench please don't ping roles, and please don't cross-post. this is the correct channel for CircuitPython on Raspberry Pi using Blinka

civic trench
#

@rotund pivot Hi, I am new to discord, earlier I was suggested to post in that channel by bot, they told me to post here. Yes I have installed blinka .. But I am not able to display spritesheet

#

most of the tutorials are with Pi Pico .. but I have Pi 4B

rotund pivot
#

the idea of Blinka is that you can use many CircuitPython libraries and example code on a Raspberry Pi

civic trench
#

Sure, I am doing ..

rotund pivot
#

displayio is a native module on mircocontrollers, but it's not native to Raspberry Pi

civic trench
#

I am looking for that guy who has used this monochrome display with Pi 4, finding solution for this it is very tedious

rotund pivot
#

the Blinka Displayio library, which is a port of the original CircuitPython displayio library and is built on top of Adafruit Blinka and the Python Imaging Library.

#

I read those as meaning you'll need Adafruit_Blinka_Displayio and PIL libraries

zenith crystal
# civic trench I am looking for that guy who has used this monochrome display with Pi 4, findin...

if you're using Java, you can use https://github.com/Pi4J/pi4j-v2 or https://www.diozero.com/ (which has a direct 1306 implementation)

GitHub
GitHub - Pi4J/pi4j-v2: Pi4J Version 2.0

Pi4J Version 2.0. Contribute to Pi4J/pi4j-v2 development by creating an account on GitHub.

diozero
diozero

Java Device I/O library that is portable across Single Board Computers. Tested with Raspberry Pi, Odroid C2, BeagleBone Black, Next Thing CHIP, Asus Tinker Board, Udoo Quad and all Arduino devices that can run Firmata. Supports GPIO (digital, PWM and analog), as well as devices conntected via I2C, SPI and Serial buses.

civic trench
ornate bluff
quasi basin
#

Hi. I'm trying to configure a vsftpd to work with sftp but if I use the user with sftp it always connects via ssh. I want it to open the folder I specified with local_root

civic trench
#

Hi Team, I am not able to get the DisplayIO module, how ever I have installed all required packages

image.png image.png
#

any help is much appreciated

lean kiln
#

the prompts are using different python environments. In the vscde one run pip install blinka etc

solemn finch
mint berry
#

Hi all. Trying to see if there's any thing I might be missing. Raspberry Pi 5 4gb, with official active cooler, using the official pi power supply, in the official case (plastic layer with small fan removed to make room for active cooler. ) Running VLC with a 4min 1080p MP4 video on a continuous loop, hooked to a TV in a convention center for 4 days. Approxamitely 8 hours per day. Froze up once on Thursday, twice on Friday, once on Saturday, no times on Sunday but that was only a 5 hour day. After the first freeze on Friday I removed the lid of the case thinking it was blocking the fan. Didn't seem to help.

zenith crystal
mint berry
#

I couldn't ssh into cuz I was working

#

power cycle fixed it, I was thinking it was just heat,

#

but it wasn't that hot in there and why would it over heat with all the official stuff

modern matrix
#

I've used a Pi 2 for a multi-day convention video loop before; the Pi 5's extra heat/power sometimes complicate things. when it froze, did it freeze mid-image, or blank screen? could be a marginal/failing microSD card, too.

#

if you're planning to use it for that again, you could run a burn-in test at home, maybe with a keyboard attached, and see if the system truly locks up with no response to local input or SSH.

#

oh, and depending on how the OS is configured, you may actually have logs from the convention days. check out /var/log and see if the dates on the gzipped log archives are useful. if you didn't have network access or a real-time clock, the dates might be bogus, but you could still look over them for e.g. undervoltage or overheat throttling warnings.

#

e.g. zgrep -i undervolt /var/log/syslog*

#

or look through them for reboots and see if you can spot anything amiss?

mint berry
#

Next time I'll just find my pi 3

mystic light
#

anyone know the difference between 2 Rasp Pi Zero 2 SKUs? SC1146 or SC0510?

humble marsh
mystic light
#

obviously the larger number must be better, right? 🙂

humble marsh
median sleet
#

sudo apt install dkms raspberrypi-kernel-headers ... raspberrypi-kernel-headers is already the newest version (1:1.20230405-1).

#

$ sudo dpkg -i snd-i2s-rpi-dkms_0.0.2_all.deb

#

Module build for kernel 6.1.0-rpi8-rpi-v8 was skipped since the kernel headers for this kernel do not seem to be installed.

#

um.. halp

velvet folio
#

I am trying to use a ssd1306 oled display on a raspberry pi in Python. I need a library that will work. The adafruit-circuitpython-displayio-ssd1306 doesn't seem to work and their discussion group suggested coming here. I need some help finding a library/solution that will work. I just want to display 5 lines of text every 5 seconds with several different dynamic text content. Ideas?

zenith crystal
#

i saw the posts but missed what the traceback error was?

#

i'm primarily a Java dev, but that does mean I know a bit about threads 😀

zenith crystal
#

quickie possible pythony pseudo-code:```
def data = []
display = your_display_setup() // init SSD1306 and displayio
start_other_threads(data) // no display stuff!
while True:
sleep(5)
display.print(f"L1: {data[0]}\nL2: {data[1]}\nL3: {data[2]}\nL4: {data[3]}\nL5: {data[4]}")
// end loop

you **may** need to get fancier and put some locks around that data so that you don't get a write to the array when it's trying to print
velvet folio
#

I have a library that works perfectly and is much simplier to use. Thanks

zenith crystal
#

i see...

crisp estuary
#

Hello.

I have an Adafruit FXOS8700 + FXAS21002 breakout from back when they were still made, and was hoping someone would be able to help me troubleshoot by triangulating my observations.

When I wire it up to my Raspberry Pi 4B (ground, 3.3v to the sensor's vin, SDA, SCL) and run sudo i2cdetect -y 1, the sensor doesn't appear; the entire grid is filled with dashes, indicating that nothing is detected. When I disconnect the Pi's 3.3v from the sensor's vin, I get the same results, but much quicker; the sensor is having some effect. The same is observed when I disconnected SCL.

smoky bramble
#

Just askin', what is the smallest board that can run linux?

zinc jackal
smoky bramble
#

Nah i was being curious

#

I found about the luckfox pico today

zinc jackal
#

Yeah, the mini is definitely smaller. 😅

#

Seems rather limited though.. compared to a Pi Zero 2W.

smoky bramble
#

Yeah, but it made me wonder what was the smallest )commercially available) sbc/linux board

zenith crystal
#

i think that might be it, tbh -- i have two of 'em and if you remember they're only 2 cores and not the speediest things in the world, they are pretty dynamite

#

or possibly the compute module, if you're talking "size"

rugged tusk
#

After a few short weeks of using raspberry pi 5 and Raspberry PI OS lightdm decided it was time fail.

#

As anyone encountered this issue. The GUI just stops working. After reinstalling lightdm I get a GUI that doesn’t look like the default raspberry pi os gui. Just some broken icons and large trash can. Smh at this rubbish. Any thoughts would be greatly appreciated

zenith crystal
#

that sounds like you may have a bad disk? are you using the pi imager app?

rugged tusk
#

Yes

mystic light
#

Quality brand SD card?

humble marsh
#

i have had SD cards fail within a relatively short time when used on an RPi

summer coral
#

Anyone have a lead on how to prevent the HDMI driver from loading on raspi os bookworm?

rugged tusk
mystic light
#

I'm using Samsung endurance SD cards, designed for dashcams and the like

rugged tusk
#

That’s good to know. How often have you had to replace it?

mystic light
#

0 so far, but I only have a month or so on them, and not very heavy usage yet. Some people recommend turning off swap file, but I haven't done that

rugged tusk
#

I may switch to usb boot once I have a dedicated use case for my pi5

mystic light
#

I've got about 4 of them I'm working on

rugged tusk
#

Gratitude

proven fern
#

Hello! i am having trouble to make the sh1107 works, i picked the example code and solve a problem installing the blinka-displayio but now it is throwing this error and i am not sure what's going on, maybe someone can give me a clue: python3.10 dexample.py Traceback (most recent call last): File "/home/pi/air-quality-device/dexample.py", line 2, in <module> import displayio File "/home/pi/air-quality-device/env/lib/python3.10/site-packages/displayio/__init__.py", line 21, in <module> from busdisplay import BusDisplay ModuleNotFoundError: No module named 'busdisplay'

zenith crystal
zenith crystal
humble marsh
smoky bramble
#

i remember it wouldnt let you change the resolution from cli

zenith crystal
#

that's enabling the video acceleration, but yeah leaving that off would help, too

smoky bramble
#

and was a pain to change for me since i use a wayland compositor

zenith crystal
#

"friends don't let friends run GUI on pis < 5" 😀

proven fern
#

Does anyone knows why I am getting duplicate texts in sh1107 when I am only using one label?

rn_image_picker_lib_temp_a46b944e-b414-40af-be9c-d752a0e38da3.jpg
smoky bramble
#

Guys
Linux kernel
On the ESP32S3

FrL2MB5WAAEL2sb.jpg_large2.jpg
#

Gonna try to do it tomorrow

steady rose
proven fern
# steady rose can you share the code being used to generate that output

sure! ```import time
import serial
import board
import displayio
import terminalio

from adafruit_display_text import label
import adafruit_displayio_sh1107

serial_port = '/dev/serial0'
baud_rate = 9600

ser = serial.Serial(serial_port, baud_rate)

def read_pm_data():
# code to read data

def decode_pm_data(data):
# code to decode data

displayio.release_displays()
i2c = board.I2C()
display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)

WIDTH = 128
HEIGHT = 64

display = adafruit_displayio_sh1107.SH1107(
display_bus, width=WIDTH, height=HEIGHT, rotation=0, auto_refresh=False
)

canvas = displayio.Group()
display.root_group = canvas

pm25_text_area = label.Label(terminalio.FONT, text=" "*20, color=0xFFFFFF)
pm25_text_area.anchor_point = (0.0, 0.0)
pm25_text_area.x = 8
pm25_text_area.y = 8
canvas.append(pm25_text_area)

try:
while True:
pm_data = read_pm_data()
if len(pm_data) == 32:
pm25, pm10 = decode_pm_data(pm_data)
pm25_text_area.text = f"PM2.5: {pm25}"
display.refresh()
time.sleep(1)
except KeyboardInterrupt:
pass```

steady rose
#

hmm. nothing obvious.

#

what's the general behavior of the two labels if you just let the code run?

#

do they both update?

proven fern
#

at the beginning only one updates once, the original one and in the next iteration appears the other one and that's the one updates itself, the original one doesn't update anymore

steady rose
#

what main board are you using? is it a raspberry pi?

proven fern
#

yep, a raspberry pi zero w

rugged tusk
#

Alittle more context around the issue I'm having with lightdm not working on rpi5. I have tried the following on a samsung 128g sd card and a sandisk extreme 128g sd card. After install dhcpcd5 , adding a static ip address for the wireless interface and setting dns to my pihole container I reboot the raspberry pi 5 and lightdm no longer works. 🦆

summer coral
zenith crystal
rich latch
#

I have a 2.8" 320x240 TFT Touch screen for my Raspberry Pi that I'm having trouble with. I've run through the Adafruit steps for installing on a Rasp Pi 4B. Can someone help me with this? I'd really like to get this working.

thin pelican
#

Anyone ever get "bash: line 1: 22: command not found" trying to ssh from one pi to another?

Various other machines can ssh to this particular board. And the pi400 that is having this issue can ssh into anything else.

Any ideas?

fading rapids
#

does this error shows up after you type in your password?

thin pelican
#

Yes. It connects, gives all the usual host authenticity blah blah blah, prompts password, and as soon as I hit enter, it just returns that error.

fading rapids
#

try different host

thin pelican
#

I've tried ssh'ing to other machines from the pi400 and it was fine.

#

Also, used other machines to shh into the pi zero in question, no problems.

#

The pi400 also has no issues taking an incoming ssh.

#

Only idea I had left was that because the build I'm using has multiple terminals installed and maybe that's what was causing a bash error. Tried each one separately this morning and no good. Could still be the root cause I guess, but it is happening across all terminals on that build.

#

I Googled the error and I think it's the only search result since 1995 that only returned ONE result lol

It was like stack exchange or something and it was left unanswered. 🤦🏼‍♂️

zenith crystal
#

dumb suggestion - check your pi400 ~/ssh/config for something like LocalCommand?

thin pelican
#

Found a file that does have "local command" in it but it's not a config per se

#

/usr/share/bash-completion/completions/ssh

zenith crystal
#

nope, unlikely - that just allows you to type ssh and then hit tab to complete things on remote systems

thin pelican
#

Wait wait wait. /etc/ssh/ssh_config

#

"PermitLocalCommand no"

thin pelican
zenith crystal
#

no, leave it alone -- it's good -- i'm just trying to remember the login sequence

#

and what do you mean by "multiple terminals installed" -- physical access?

thin pelican
#

Like I have the lxqt terminal, the standard one raspbian comes with, xterm, and a few others

zenith crystal
#

that should be immaterial over SSH - does the SSH session terminate immediately or does it continue and let you in?

thin pelican
#

Terminates.

#

Returns the error and then immediately drops me back to my local

zenith crystal
#

okay, try this: try from the pi400 and then actually login from elsewhere -- go check your system logs (they keep changing around which ones) for anything related to the pi400 failure (timestamp, ip address)

#

oh, duh - also try ssh -vvv from the pi400: that might show what's happening on the server side

thin pelican
#

So this is wierd, I ran it verbose. It failed again, I looked at it, figured screw it try once more, and it connected.
I feel like most times I fix something it's on accident.

restive jungle
#

Would anyone know why every time i attempt to SSH in to any of my pi's it doesn't work its connected to my WIFI i see it on my routers config page but if i try to ping something in the terminal or connect to it over ssh it just doesn't work.

mystic light
#

Are you pinging with address or host name?

zenith crystal
#

can you connect a monitor and keyboard to it? if you cah, run sudo raspi-config and make sure SSH is turned on

mystic light
#

I ran into similar issues recently while bringing up a whole bunch of new rpzeros, and rp4s, and it was usually something in the wlan or eth0 config setup if I remember correctly

restive jungle
#

and the wired thing is ive gotten it to conect some times but most of the time it just fails

restive jungle
#

i think it might be a issue with the wireless lan

calm needle
#

https://learn.adafruit.com/introducing-the-raspberry-pi-zero/is-my-pi-zero-dead suggests that if I connect my zero to a laptop it should enumerate and let me use the usbboot tool, but it doesn't show up under lsusb as a connected device when I connect it with no SD card. a zero 2w with the same cable shows up fine.

do I need to configure something else for this to work? I want to be able to upload a kernel from my laptop without constantly swapping sd cards

Adafruit Learning System
Introducing the Raspberry Pi Zero

65mm x 30mm x 5mm of Pi Power

calm needle
#

figured it out, the zero appears to have a bootrom bug that means it doesn't enumerate on an m1 mac - using an amd desktop works fine. zero 2 doesn't have the same issue and works on both.

frank gazelle
#

hey guys does anyone known if fbcp can be used on the 1.3 tft bonnet (joy stick version) to display the desktop/ mirror the hdmi in a tiny mode. I did make the build but the screen just stays blank with the backlight on(bar the splash screen). any direction would be appreciated (I also tried out juj's git with no luck)

I know the desktop is not recommended I did get the console and python to work but its not really what my project needs.

junior edge
#

Hey there! So currently trying to use the max7219 module of Circuit Python, and first time using CircuitPython, what pin is board.D4 in the DigitalInOut() function?

#

we're running a rpi3

ruby night
#

You shold be able to use any GPIO pin for the CS.

#

Since it uses board.SPI it is using the standard pins for SPI, MISO,SCK on the pinout above.

junior edge
#

ok so then where would I plug in the DIN and CLK ports? Since I see multiple clock pins but no SPI pins, Im guessing DIN plugs into a SPI port?

ruby night
#

also DOUT would go to MISO(GPIO9) but may not be needed

junior edge
#

Thanks that worked!

#

So new issue, I don't believe I installed Circuit Python all the way as I dont have font5x8.bin installed, I have the file now just confused where I'd have to put it at

ruby night
#

It should be in the same folder you are running your code from.

junior edge
#

It is! Still refuses to see it

#

nvm!

#

I got it working!

ruby night
#

Yay!

cunning quarry
#

Hey guys, hope everyone is having a good day.

I am not sure if this is the right place to ask this, but I am having problems connecting my TRAXXAS RC Car to a raspberry pi

It's wired and connected but whenever I run a program using the adafruit_servokit using a PCA9685 servo driver to connect the servos from the RC car to the pi it doesn't work too well.

Whenever I try to change the steering it changes a little bit, but doesnt do much.
The throttle/motor flashes green at me whenever I try to turn it on, and i have tried to calibrate it multiple times and it doesnt seem to work

Has anyone worked with this before and knows what to do? Thanks, I can give more information I have a video of my setup as well.

zenith crystal
#

three things:

  1. you will probably have to add the servo "trim" parameters to the servo code in order to get full operation -- by default, a Servo device will have very limited range, thus for full 180 degrees on an SG90 servo, i use servo.set_pulse_width_range(500,2400)
  2. did you set the default board frequency to 50hz? from adafruit_pca9685 import PCA9685 pca = PCA9685(board.I2C()) pca.frequency = 50
  3. try setting the I2C bus frequency to 400Khz dtparam=i2c_arm=on,i2c_arm_baudrate=400000 in your /boot/config.txt file
cunning quarry
#

So I was using a different library adafruit_servokit, but this library pca9685 looks better.
Quick questions: 500 - 2400, this is for the motor only correct? The ESC works at around 2300 or so, but I am not sure of what the steering servo work at.
What does changing the I2C bus frequency to 400Khz do? What is that doing in this context?

zenith crystal
#

i use one of the pca channels as the input to a from adafruit_motor.servo import Servo object (e.g. pwm = pca.channels[channel] s = Servo(pwm, actuation_range=180)

the pulse range is specific to each type of servo, so you need to know what kind of motor you're talking to

the bus speed just means you can send more I2C commands quickly, if the chip/board/capacitance of the i2c bus supports it -- i've had lots of good results with that particular setting, esp with the PCA and SAMD51 controllers

cunning quarry
#

awesome stuff, alright i'll try this library out and see how it works. I'll hopefully let you know if theres a problem haha, thank you.

cunning quarry
#

@zenith crystal Great stuff, I got the steering to be able to move with some basic code
Just wanted to ask if you had any sort of sample code I could look at for any further improvements? I still need to know how to get the motor working, and anything else to do with this library.

Thanks again.

zenith crystal
cunning quarry
#

Would you know how to get an ESC working? I think the document goes over information relevant, but I want to make sure.
Here is my code for example: import time
import board
from adafruit_pca9685 import PCA9685
from adafruit_motor.servo import Servo
pca = PCA9685(board.I2C())
pca.frequency = 50

def testRun(channel=0):
if channel == 0:
print("Steering")
pwm = pca.channels[channel]
servo = Servo(pwm, actuation_range=180)

            servo.angle = 90
            time.sleep(1)
            servo.angle = 0
            time.sleep(2)
            servo.angle = 180
            time.sleep(2)
            servo.angle = 90


    if channel == 1:
            print("ESC")
            pwn = pca.channels[channel]

testRun()
print("Done")
channel 0 has the steering servo and this works with just testing the angles
channel 1 has the ESC, would you know where to begin to where I could get the throttle working?

zenith crystal
#

see the #welcome build for how to post code, but i would suggest going to the learning guide for the PCA board to learn how to use multiple motors at the same time

zenith crystal
mystic light
#

ESC's will often have an 'arming' sequence before they accept throttle commands

zenith crystal
#

i'm not sure how you'd have that wired up to a the controller, to be honest -- i'm pretty sure an ESC won't take PWM signals?

cunning quarry
#

Ya, I think I got the program to work, but now whenever I try to "use" the ESC through the program the ESC just blinks green.

I am assuming this is the "arming" sequence or the calibration. But I have not bee nable to get around this.

I am also not going to use a controller, I am planning on this being fully automated.

But it seems like the ESC is reading the fact I am sending it signals, it just wont take them.

zenith crystal
#

just kind of "thinking out loud" with zero research: - since the ESC is supposed to be connected directly to the radio, that implies to me that it may be expecting a digital/binary signal sequence -- and now to 🛏️

cunning quarry
#

Haha, got it to work. Just had to figure out how to calibrate it with my pi. using time.sleep(2) between max throttle, max reverse, then neutral.

Thank you EdGJr and KevinT!

mystic light
#

yup, that's the arming sequence

#

we had to do the same using an MCU to PWM control an ESC

#

it was a commercial drone ESC

wraith grove
#

Huh, I've had to do that on drone controllers before. I did not assume that was the motor controllers gating that...

cunning quarry
#

Hey, anyone know how to get opencv working with Picamera2?

I've tried turning the verison of opencv down to 4.6, this didn't work, and some other methods that didnt work.

rpicam-hello works, program with cv2 work, but both of them together dont work

Any help?

modest orbit
#

Have you tried the Mini Hat on Raspberry Pi4? I keep getting an error when using their ST7789 library example code:
spidev.SpiDev(0, 1) the error is FileNotFoundError Error2 no such file...
I've tried for 2 days to find out what's going on - no joy. I give up. I think it may have to do with we now run everything in venv. ???
I of course have enabled SPI and I do see /dev/spidev0.0
https://www.pishop.us/product/display-hat-mini/

PiShop.us
Display HAT Mini

American Raspberry Pi Shop. One stop shop for all your Pi needs. Raspberry Pi add-ons, HATs, accessories, Starter Kit, Media Center kit, RetroPi Arcade kit, Ultimate Kit, and many other project kits. PiShop.us is approved Raspberry Pi re-seller and carries all official Raspberry Pi boards and products.

cunning quarry
#

@modest orbit I wouldn't know anything with the mini-hat, but it seems like you might have a problem with packages not running in the VENV?
If this is the case you can do something kind of redundant but it does work.
if you have a python VENV already made you do a command like "sudo nano venv/pyvenv.cfg" From there turn "include-system-site-packages" == true

This will make the VENV basically not a VENV, and it will use all packages from the system as well. It basically destroys the whole reason to have a VENV, so if you have VENV for a particular case don't do this

But you can get the benefits of pip and sudo apt-get packages and it might help your program see the File its missing

mystic light
#

why are there 50 different ways to set a static IP for a Raspberry Pi Zero 2W? Ok, slight exageration, but there are still lots. What's the right/best way to do it?

broken shuttle
mystic light
#

I think my router is finally doing it's job assinging a static ip, we'll see if it sticks

thin pelican
zenith crystal
broken shuttle
#

Assuming your router isn't periodically reset by the ISP, yes.

zenith crystal
#

it's my router, dammit 😈

mystic light
#

☝️

#

people wouldn't have had any success patching the kernel for pre-emptive real-time OS...would they?

#

🤞

faint sparrow
#

If that was not the case... Just use ddns

tame axle
#

Some days back, Dan suggested I use tio to connect to my pico from my RPI. It works great! (Thanks Dan!). Now I can putty into my RPI thru my local router as usual, however the attempt to use tio on the RPI to connect to the pico doesn't work. Same command, but obviously something is missing. Any ideas?

ruby night
#

I use tio all the time on a Pi (often with Pico) tio /dev/ttyACM0 -b 115200

tame axle
ruby night
#

obviously, you have exited the direct tio session before attempting the remote one, correct

tame axle
ruby night
#

any error message or does it just not conect? ```jerryneedell@Mac-mini Downloads % ssh gjnpi5nvme.local
jerryneedell@gjnpi5nvme.local's password:
Linux gjnpi5nvme 6.6.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Fri Apr 12 12:55:49 2024 from 10.0.0.35
jerryneedell@gjnpi5nvme:~ $ tio /dev/ttyACM0 -b 115200
[12:59:35.872] tio v2.5
[12:59:35.872] Press ctrl-t q to quit
[12:59:35.872] Connected

#

I'll find a pico...

tame axle
#

It just doesn't connect

ruby night
# 
[13:02:44.983] tio v2.5
[13:02:44.983] Press ctrl-t q to quit
[13:02:44.983] Connected
Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.

Press any key to enter the REPL. Use CTRL-D to reload.

Adafruit CircuitPython 9.0.0 on 2024-03-19; Raspberry Pi Pico W with rp2040
>>> ```
tame axle
#

OK .. I rebooted the RPI... now it works. Appearantly a connection was still lingering...

ruby night
#

Yay!

tame axle
#

Thanks for the nudge....👍

ruby night
#

This is the most productive thing I've done all day!

tame axle
wet mantle
#

what would be the easiest way to get adafruit 1.3 bonnet working on kali linux on rpi zero

lean kiln
wet mantle
#

yes, that is the one

lean kiln
#

At the end of the description is the learn guide link

wet mantle
#

yes, i've explored it and got it working on official image without any hassle

#

but i require monitor mode (via nexmon) which is only available for kali

#

and the bonnet requires blinka which only runs on official image

lean kiln
#

AHH I see. You can run blinka on other platforms, but need to tell it you are a generic Linux pc

#

something like this was what I used before, effectively setting environment variables to force a certain board (linux pc) and then chip (if required)

# 
## Uncomment these lines to force specific board/chip:
    # logger.info("Attempting to init blinka BOARD as generic linux:")
    # os.environ.setdefault("BLINKA_FORCEBOARD","GENERIC_LINUX_PC")
    logger.info("Attempting to init blinka CHIP as MCP2221:")
    os.environ.setdefault("BLINKA_FORCECHIP","MCP2221")
    os.environ.setdefault("BLINKA_MCP2221","1")
wet mantle
#

but on the very step it says to install the latest official image, i wasnt able to find anywhere installation for other os

lean kiln
#

Your correct in the fact blinka is designed for the pi OS If you use a Pi, although it's worth noting there was Circuitpython for the Pi zero (no OS just bare metal Circuitpython)

wet mantle
lean kiln
#

Yeah that!
Hopefully another user with Kali expertise may help. Also search the forums / internet for blinka Kali pi

wet mantle
#

but that is an entire image

#

and i want to use kali image or raspbian... i just want monitor mode and bonnet to work

lean kiln
#

what is monitor mode?

#

like use as a pc?

wet mantle
#

no no, give me a sec

#

wireless adapters are usually used to connect to wifi and receive and send packets, most of the time, that type of function is called managed mode

#

there is also monitor mode for wireless adapters, mode in which you can capture packets and inject packets

lean kiln
#

oh wifi monitor or promiscious mode

wet mantle
#

yes

#

sorry, forgot to specify

lean kiln
#

thought that was more of an adapter setting (along with hardware compatibility)

#

i.e. should work in raspbian / pi OS

wet mantle
#

all the examples i saw were using someting called nexmon

#

which is an custom firmware patch that "enables" monitor mode for adapters without one

#

and i have trouble getting nexomon to work in raspberry pi os

lean kiln
#

Oh I see, curious how that works or at least is compatible with different hardware.
I'll be honest, not looked at wifi monitoring in years, since the days of aircrack-ng etc, and mostly I was wireshark or other software. I do remember the adapter monitor mode support being a pain / prerequisite unless you wanted to get your hands dirty compiling

wet mantle
lean kiln
#

I did get one non-monitor mode adapter working, but it was soo much more sensible to buy a compatible adapter for $15 and save your time / effort

wet mantle
#

i currently leaning towards that solution, because i don't think i have the expertise to get that to work

#

i'm trying to make a portable (flipper-like) machine on rpi 0, so my plan was to keep it as small as possible, but will probably end up buying a monitor mode enabled adapter

lean kiln
#

I distinctly remember failing to get a few non-promiscuous adapters working despite claims to the contrary of some patched drivers.
You'll probably thank yourself for taking the easier path. Also a second tiny usb wifi adapter could be useful in future projects (just dont forget your OTG cable).

wet mantle
#

aloa?

#

it's like a rubber ducky on steroids

#

do you perhaps know would usb hub work on rpi zero?

lean kiln
#

not sure, a few I've used haven't but most have. Can't remember what it affected, but some things don't like hubs (or at least want them powered)

wet mantle
#

thank you very much for your time, you saved me quite a few hours

torn trench
#

Does anyone know of a good way to maintain mostly similar debug/production images with buildroot? Like if I want to say, add GDB and debug versions of my pacakges to one image? I don't see any way to "include" a defconfig in another defconfig, so it looks like maybe I just have to maintain them in lockstep?

zenith crystal
#

what you could do is have the main Makefile "create" a makefile from a template with whatever config changes are needed for the debug/prod targets and then have it invoke that makefile

crystal jewel
#

g'day - I have a v4l2rtpserver setup on bullseye that has been using an old web-cam and it worked well; today I got a Camera Module 2, and after modprobing the bcm2835-v4l2 driver, rebooting and restarting the v4l2rtpserver it's working - but the image is black and white now!

not sure what the issue here is... can't find anyone else reporting it

#

might update to bookworm and see if that helps

hasty tundra
#

Hello.
I'm using the WiringPi Library for cascading 4 MCP23017 (I2C)
I've dona all basic test and the chip are working and I2C address are right assigned.

My problem is that I am not able (I am not very expert),
to assign an ID to each of them.

For using just one MCP23017, I should use the syntax included in the code below (which works fine),
but if I have to use more than one of these chips, I am not able to assign an ID and associate the subsequent addresses to each one (0x21, 0x22, 0x23)
Kindly, can someone add me the correct string?

import wiringpi
from time import sleep

pin_base = 65      # lowest available starting number is 65
i2c_addr = 0x20     # A0, A1, A2 pins all wired to GND

wiringpi.wiringPiSetup()                    # initialise wiringpi
wiringpi.mcp23017Setup(pin_base,i2c_addr)   # set up the pins and i2c address

wiringpi.pinMode(65, 1)         # sets GPA0 to output
wiringpi.digitalWrite(65, 0)    # sets GPA0 to OFF
...
proven fern
#

Hi! Does anyone knows why sgp30 is not being detected by i2c tools?

sgp30.jpg
steady rose
#

could be soldering. GND pin looks cold soldered. SDA and SCL are a bit thin.

image.png
#

is that a pi that the SGP30 is connected to?

#

oh, wait, probably is, didn't see what channel this was

#

what pins are being used on the pi?

proven fern
#

1 to vin ,3 to sda,5 to scl and 9 to gnd,i checked with a voltimeter and soldered well

#

additional to that i tested with an sh1107 display and the display works with the same pins and i2c tools detect the display

steady rose
proven fern
steady rose
mystic light
#

does anyone have any experience using the linux CLI to read the battery status of a connected bluetooth device?

modern matrix
mystic light
#

yeah, I tried that and I don't get any result from list-attribut4es

mystic light
#

looks like I can parse a bunch of info from pacmd or pactl and extract a rough battery percentage

mystic light
#

anyone have experience with pigpio?

faint sparrow
#

Hey guys, i have a problem, the black usb cable is for the powering and it’s working, the hdmi is working too but the white usb cable for my mouse, is on when I turn on the raspberry li but I can’t use it like when I move it, it doesn’t move on the screen. Am I doing something wrong?

IMG_1902.jpg
zenith crystal
#

open a terminal (or ssh to one) and type lsusb and see if it's showing up

simple storm
#

I was told to ask in this channel for help with Linux in pi’s. Currently I’m trying to set up a pi4 model B with a bonnet attached to a 64 by 32 led matrix. I’ve been prying at this for weeks. I’m trying to display an image on the pi like this one. I’ve followed tutorials and walkthroughs online but have been running into errors and issues. Does anyone have experience with led matrixes and pi’s? If so, any help would be much appreciated

IMG_4492.jpg IMG_2979.jpg
mystic light
#

just show some of the errors you're getting and people will jump in if they can help

steady rose
steady rose
faint sparrow
faint sparrow
steady rose
#

desktop version of pi os? or lite?

faint sparrow
#

I downloaded raspberry bookworm iso, I think is desktop yeah

steady rose
#

are you able to ssh into the pi?

faint sparrow
#

I still not able to log in the desktop cause I have to click a button but I can’t click it cause the mouse is not working on it

steady rose
#

troubleshooting will be difficult without getting into the pi somehow. try setting up ssh so you can access it that way.

faint sparrow
#

Do you mean setting it up in my windows on the SD card before plug it in?

steady rose
#

yes. it can also be enabled when originally creating the SD card image. its an option in rpi-imager.

faint sparrow
#

The only pre-configuration I did is that I created an empty file named ssh on the root folder of the image

steady rose
#

i'm not sure that approach works anymore with latest OS's

faint sparrow
#

Oh really, I only followed a guide on a site cause I never worked with a Pi before

steady rose
#

it might be an old guide

#

(those screenshots are most likely out of date)

faint sparrow
#

I actually didn’t download the image that way

#

Cause I tried first but it kept showing errors

steady rose
faint sparrow
#

So I downloaded the image iso as a zip and then downloaded another app called “balenaEtcher”

#

And downloaded it that way

steady rose
#

rpi-imager is the new etcher

#

you can use pre-downloaded images with rpi-imager

#

that's what i do

#

the ability to download within the imager is just a convenience feature

#

it's generally the last option in the scroll down for the operating system choices

faint sparrow
#

Can you suggest me an image to download

#

There’s a lot of options and I don’t know which one is good for me

steady rose
#

what are your plans for the pi?

faint sparrow
#

I asked an AI before and it says better be 32 bits

faint sparrow
steady rose
#

yep

faint sparrow
#

Oh it’s gonna connect to an active device by sending some protocols and get the address MAC and the name of that device then send it to my computer by using PuTTY and store the informations in SQL. There’s also an arduino uno connected to the Pi by I2C communication cause this is sort of a robotic project so, there’s infra rouge sensors in the arduino

#

I Hope you understand what I said

steady rose
#

sounds like you don't really need the desktop version then?

faint sparrow
#

I need to code this in the raspberry I desktop?

#

The data base and the arduino configuration will be inside the raspberry Pi

#

I really don’t know. This is my first time for a raspberry. If you have any idea, I’ll be happy to know

steady rose
#

are you wanting to run the Arduino IDE on the Pi? or are you programming the UNO separately?

faint sparrow
#

No, I will program them separately

#

Arduino IDE on windows

#

And python script in a raspberry to send and receive data from the arduino

steady rose
#

are you OK with doing things via a command line only?

faint sparrow
#

I don’t know how

steady rose
#

and then use rpi-imager to create the SD card image

#

and have rpi-image do some of the initial configuration, like network, enabling SSH, etc.

faint sparrow
steady rose
#

yep

#

just that the screen shots probably won't look exactly the same

faint sparrow
#

Emm there’s another problem I guess

steady rose
#

they seem to change it with each rpi-imager release

faint sparrow
#

I read in that guide that the pre-configuration doesn’t work in the latest version “bookworm”

steady rose
#

that's for doing things via text files only

#

that's like the "old" way to configure things

faint sparrow
#

Oh so i will configure it inside the imager

steady rose
#

the guide is showing both an "old" way (text files) and a "new" way (rpi-imager)

faint sparrow
steady rose
#

yep. ignore the "Text File Editing" stuff.

faint sparrow
#

So I will choose the costume option on the OS inside the imager right?

#

And choose the iso I downloaded

#

And then follow the guide

steady rose
#

yep. and then you can select the 2024-03-15-raspios-bookworm-armhf.img.xz file downloaded above

#

use the guide as a reference, but the menu options might be different

#

different menu layout/location

faint sparrow
#

Yes I will pay attention to that and read everything

#

So after that, I can access to the desktop without clicking any button?

steady rose
#

the main thing is to get networking and ssh working

#

so you have that as an option for accessing the pi

#

if the attached mouse/keyboard are not working for some reason, then you're kind of stuck

#

and ssh'ing in will allow trying to figure out why

mystic light
#

you can also use VSCode over ssh, though it doesn't work great on the RPi Zero,

faint sparrow
#

Ok thank you so much

#

I will try to do these things and I hope it works

steady rose
#

the pi zero is one of the trickier Pi's to get working, since it has such minimal ports

faint sparrow
#

Yes I have the pi zero 2 and the ports are limited. Now I have only one USB port available to change between the mouse and keyboard after

mystic light
#

if you can, getting a usb2go hub with an integrated ethernet could help a lot

#

if you plan on doing desktop development I would strongly recommend it, if you can develop over ssh, it's less important

faint sparrow
mystic light
barren mantle
#

I hope I am asking this question in the right place ... sorry in advance if I am not.

I am trying to build the "Raspberry Pi Wearable Time Lapse Camera" (https://learn.adafruit.com/raspberry-pi-wearable-time-lapse-camera/overview).

As part of that, there is a step to install wiringpi

sudo apt-get install -y wiringpi

When this command is run the "no installation candidate" error is thrown.

$ sudo apt-get install -y wiringpi
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package wiringpi:armhf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'wiringpi:armhf' has no installation candidate

What is the solution? How can I build the "Wearable Time Lapse Camera?" Especially since I just purchased all the hardware 🙂 ?

ALSO, is there anyway to take video rather than just a picture every two seconds?

mystic light
#

what board are you using, what OS do you have installed?

barren mantle
steady rose
#

@barren mantle that may be out of date info. looks like it's only mentioned in a code comment. have you gone as far as getting Blinka installed?

steady rose
#

in general, it should nominally work once Blinka is installed

#

note the code has been moved from a shell script (.sh) to a python file (.py)

#

don't use the shell script

#

wiringpi is not used

barren mantle
#

Thanks. It didn't say that two days ago!

#

Two days ago - and the prior week when I started this, Blinka wasn't mentioned.

steady rose
#

yep. looks like those updates are very new. so just coincidence on when it was updated. thats happening right now to various pi guides. and there may still be some that are showing outdated info. this is a good place to get help when you run into one of those.

faint sparrow
#

Hey guys, I have a problem on my raspberry li zero 2W. Even though I added my wifi in the imager while downloading. It still can’t activate when I turn the desktop on

#

What’s the problem going to be?

zenith crystal
#

this implies that you have a desktop, so open a terminal and run sudo cat /etc/wpa_supplicant/wpa_supplicant.conf -- it should look like ```ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
ssid="Your Wifi"
psk=your sshkeyencrypted
}```

make sure you're using the appropriate wifi channel (b/g/n)

woeful grail
#

Hello, does anyone here have any experience with using the luma.oled library with an SSD1327 OLED? I'm having trouble displaying all 16 shades of grey, I seem to only be getting a max of 5 no matter how I try to specify which shade to render

idle widget
#

Hi there! I was wondering 2 things about the now discontinued IOT printer kit V2:

Has anyone "repurposed" the kit for things other than twitter/x?

Can I use the NOOBS SD card that came with the kit with a Pi zero 2 w?

#

Any assistance with this would be amazing

#

I'm not really skilled in software, but am willing to try and learn

#

Thank you!

hollow ocean
#

I have a shell (Bash) script that is not behaving as expected, and hoping someone can help. Relevent line is:

#

time ls *.tif | /usr/bin/time --output=stats.txt -a parallel "tesseract {} {.} --oem 1 -c hocr_char_boxes=1 hocr"
what I'm expecting to happen that the call to /usr/bin/time will trigger an output either to the terminal or, worst case, to the log (stats.txt) file for each file that is being processed (either, when it finishes or when it starts). Right now, I get one output to the terminal and one to the log only when the entire run is finished

#

I could switch to something like for f in *.tif; do printf (time, f); tesseract" (slightly pseudocoded for brevity) but, assuming that I understand how parallel and pi clusters work, that wouldn't allow me to move the script to a pi cluster and make full use of each board.

#

Am I missing something for getting parallel to echo something to at least the log, if not (ideally) the terminal as it works on each file?

vagrant lance
#

i think you want the time invocation in the parallel one: parallel “time … tesseract …". you might have trouble with order of writing and stuff though. that initial time invocation is only measuring the time to list files though

hollow ocean
#

And the second one is measuring the time to process all files? At least that is what the output looks like

#

I'll try (tomorrow) putting the time in the parallel invocation and see what happens (it's bedtime here, so, too late to try it now)

vagrant lance
hollow ocean
vagrant lance
#

indeed; then you’d want to probably throw the tesseract invocation into its own little script which first outputs the filename etc. but probably separate log files otherwise they’ll all be interleaved

hollow ocean
#

Problem with the tesseract call in it's own script, it wouldn't use parallel the same way, which would make using a cluster be worthless, wouldn't it?

#

I'm probably missing something about how parallel and clusters work, been a long time since I looked at clusters, at the time I didn't have a need

vagrant lance
#

assuming it's GNU parallel (parallel --help can indicate), it and tesseract know nothing about each other, so calling tesseract directly as its command argument, or from within a shell script, doesn't make a difference

#

parallel just runs copies of the requested command line at the same time, one for each input line. (and you can cap it to run only n at once with -j n etc.) i'm not sure what "cluster" implies for you, nor do i know anything about tesseract, but you'll probably need to do some extra legwork to distribute it across multiple machines?

hollow ocean
#

(The link describes an 8 pi cluster, I'll probably only do 4)

vagrant lance
#

sure, i see. they’re logically separate; parallel won’t do anything across them by itself.

hollow ocean
#

My big problem with pulling the tesseract call into its own function is tesseract doesn't appear to accept globbing, or allow iterating over a directory, that is the primary purpose parallel is serving at this moment (basic tesseract call is tesseract imagename.ext imagename hocr anything else is options and switches - attempting to use basename to pull just the file name without extension for the output or a globbing type call for the input does not give the expected result of a ocr file with the same name as the input file but the extension of the ocr file)

vagrant lance
#

right, yeah; you could also just do that with a shell loop if you didn’t want to parallelise it on the local node

hollow ocean
hollow ocean
vagrant lance
# hollow ocean Parallel says (haven't found the options) that it can be used to distribute work...

true — i see https://ulhpc-tutorials.readthedocs.io/en/latest/sequential/manytasks-manynodes/ and https://unix.stackexchange.com/questions/341264/running-gnu-parallel-on-2-or-more-nodes-with-slurm-scheduler for this.

Unix & Linux Stack Exchange
Running GNU Parallel on 2 or more nodes with Slurm scheduler

I am trying to distribute independent runs of a process using GNU Parallel on a HPC that uses Slurm workload manager. Briefly, here is the data analysis set up:

Script#1: myCommands

./myscript -...

hollow ocean
#

(I'm looking into how the cluster distributes work now, I might be stuck on parallel for no reason)

vagrant lance
#

yeah, there's a bunch of different ways you could orchestrate it. like that tutorial you mentioned uses parallel-ssh, which appears to be a little toolkit to do similar kinds of things.

#

it wouldn't surprise me if parallel could also record all those timings itself somehow, it seems to be a bit of a swiss army knife too

#

otherwise you could do parallel "/usr/bin/time tesseract {} {.} …", if it can collect the stdout/stderrs for you

#

hard to suggest more concrete things, but i think you do have everything you need to do it, just gotta glue it together nicely!

hollow ocean
vagrant lance
#

oh sure; I meant /usr/bin/time will add its own.

hollow ocean
#

Ah, gotcha

faint sparrow
hollow ocean
faint sparrow
hollow ocean
faint sparrow
hollow ocean
#

Looks like you've got a pi 0, are you using an internal wifi chip, or an adapter? If an adapter, which one? Also, what router do you have?

faint sparrow
#

I have a pi zero 2 W, it has already wifi and Bluetooth integrated

#

It supports wireless LAN

hollow ocean
#

Ok

faint sparrow
#

And the operating system im using is bookworm 32bit with desktop

hollow ocean
#

So, your on board wifi supports 802.11b or 802.11g or 802.11n. Let's skip the confusion on that for right now. Is your wpa-supplicant file configured properly

zenith crystal
#

what is the output of the command i asked you to run?

faint sparrow
hollow ocean
#

Need to run it, or on board chip supports the b/g/n thing, so don't worry about it

faint sparrow
#

Ok I will run it later and ask again

#

Thank you

barren mantle
steady rose
mystic light
#

Ok, really weird issue:
rp5: rasp5 running NanoMQ MQTT broker
wp1: W5500-EVB-PICO (rp2040) running minimqtt, listening for commands
wp2: W5500-EVB-PICO running minimqtt sending out sensor data 1/sec on different topic channel
pc: running python paho-mqtt sending commands 1/sec to wp1, also running Mqtt client to monitor rp5

rp5, wp1, wp2 connected through ethernet switch on a private subnet
rp5, pc connected to wireless network on different subnet

when wp2 is disconnected, everything seems to run fine, rp5 broker gets the commands from pc, sends them on to wp1, wp1 parses the command

when wp2 is connected, broker still sees cmds from pc, gets sensor data from wp2, but wp1 no longer gets the commands from the subscribed topic. If I disconnect wp2, wp1 will 'recover' and start receiving commands again.

Problem still occurs after switching to rp5 Mosquitto MQTT boker. Problem sill occurs when wp2 is talking to NanoMQ broker, and wp1/pc is talking to Mosquitto broker on different rp5 ports! rp5 is showing almost no CPU/memory utilization because load is so low.

I'm at a loss. I'll try to spin up a broker on a PC, but is there some weird connection limitation on the rp5?

zenith crystal
#

try a combo with the pi5 out of the equation -- run the broker on the PC; you might also try running the broker with debug logging enabled

#

also, what are you using for client identifiers and what QoS are you using?

mystic light
#

sorry, should have updated here. The problem was default MAC addresses for the circuitpython W5500 library. As soon as I added another EVB-PICO, I got MAC collisions galore. When I initialized the w5500 with individual different MACs, everything runs smooth like butter

faint sparrow
#

Hey guys, I have a problem, why the pi doesn’t power on my screen? It keeps saying (no image found) and then power on the colourful screen and then again ( no image found)

IMG_2044.jpg
zenith crystal
#

it's saying it can't find anything to boot -- the SD card isn't inserted, is damanged, or isn't properly formatted; the alternative is your pi hardware is bad 😿

faint sparrow
#

The last week was working normally, and I entered the desktop. But someone told me that the iso I used is not good so i formatted the SD card and installed another one. But her we go, nothing is showing, can the problem be from the HDMI cable or the display?

zenith crystal
#

i'm confused, if it was working why would someone tell you it was bad? (i hope to bleep it wasn't me? 😊 )

#

also, if you had it working, i'd go back to that version (i guess -- i don't know what your intent here is)

faint sparrow
#

No no it wasn’t you but it was in this server hahaha
I installed it last time with balenaEtcher, not with the imager. That’s why it worked well

#

What do you advise me with?

steady rose
#

what OS images have you downloaded so far?

#

downloaded = you have a local copy of the OS image file

zenith crystal
#

the "how" between the two isn't that much different, but ☝️

steady rose
#

filenames are probably most useful and specific. for example, have you downloaded a copy of 2024-03-15-raspios-bookworm-armhf.img.xz ?

faint sparrow
#

I downloaded this one

IMG_2045.png
steady rose
#

do you know where the file 2024-03-15-raspios-bookworm-armhf.img.xz is located on your PC?

faint sparrow
steady rose
faint sparrow
#

I unzipped it there

faint sparrow
steady rose
#

no need to unzip

faint sparrow
#

And I followed all the instructions

steady rose
#

ok, run rpi-imager and use that to burn the 2024-03-15-raspios-bookworm-armhf.img.xz image to the SD card

#

but also got through the configuration setup

#

configure network, enable SSH, etc.

faint sparrow
#

Yes yes I did all that

steady rose
#

that is a step that is done before writing the image

faint sparrow
#

I configured the network, enabled SSH and put a username and a password too

steady rose
#

did you choose the file 2024-03-15-raspios-bookworm-armhf.img.xz ? or something else that showed up after unzipping?

faint sparrow
#

I chose that one, I made sure that there was only one zipped file on my downloads

steady rose
#

and when you put the SD card in the pi, it is acting like it can not find an OS image?

faint sparrow
#

Oh one thing, why when the installation finishes, the SD split into two?

steady rose
#

"split into two"?

#

oh, like folders that show up?

faint sparrow
faint sparrow
steady rose
#

bootfs and rootfs folders are showing up?

faint sparrow
#

There’s too

#

Bootfs and the USB drive E

#

Why?

steady rose
#

that's just the resulting partition scheme on the SD card after imaging

faint sparrow
#

So it doesn’t mean, something is wrong right?

steady rose
#

no. that is expected.

#

and indicates the imaging worked

#

the bootfs partition is FAT, so will show up on pretty much anything

#

the other partition is not, so probably won't show up on windows

faint sparrow
#

Yeah, I can access the bootfs

#

Could the problem be on the hdmi cable?

steady rose
#

but in general, you can ignore those. at that point, just eject the SD card, put in Pi, and boot

faint sparrow
#

Or the hdmi port of the display

steady rose
#

hdmi in general can be tricky

faint sparrow
#

Since the display is pretty much old

#

Is there any possible way to display it on a laptop?

steady rose
#

only via SSH, VNC, a USB serial cable, etc.

#

might be worth trying to set hdmi_safe=1 in cconfig.txt

faint sparrow
#

In the bootfs folder?

steady rose
#

yep

#

(that's slightly outdated, boot is now bootfs)

faint sparrow
#

I did

#

Let me try again

#

It didn’t work

#

Still same ( image not found)

steady rose
#

do you remember what was working previously?

faint sparrow
#

i did it on balena betcher

steady rose
#

see if you can repeat your previous success

#

balena etcher should produce a bootable SD image. however, it won't be able to do any of the configuration stuff.

faint sparrow
#

yes i have to configure it manually, but i hope i work again. i'll try

steady rose
#

just curious - why have you chosen a pi zero to work with?

faint sparrow
#

should i also try another version of iso? maybe an old one

steady rose
#

use whatever iso worked before

faint sparrow
steady rose
#

ok. no worries. it's a perfectly fine pi. just a little harder to work with.

faint sparrow
#

what does that one do please?

steady rose
#

very simple - it's a USB-to-serial adapter

#

it's general purpose, not Pi specific

#

but it would allow connecting to the serial console output on the Pi's header pins

#

there are lots of "USB-to-serial" adapters out there. it doesn't need to be that specific one.

faint sparrow
#

it's good, i will consider it on my future projects

#

it didn't work

steady rose
faint sparrow
#

the green led is on, and it blinks when i power it on only

faint sparrow
#

Do I have a way to interact with a linux sbc without plugging it in a monitor first? I thought ssh, but it needs first to be enabled, so no

mystic light
#

Depends how the os is installed, for example you can set up network and ssh on a raspberry pi during the os install

steady rose
#

ssh (yes, you do need to enable it, but is easy) or console cable (see links/discussion above)

faint sparrow
modern matrix
#

it really depends on the image. I think Raspberry Pi OS disables SSH by default these days, but you can place an empty ssh or ssh.txt file on the boot partition to enable it

zenith crystal
#

no, the imager allows you to set wifi and SSh credentials while burning the disk -- basically it creates the default user for you

mystic light
#

kind of linux related: I keep running into read-only mounting for my W5500-EVB-PICO when attaching it to my headless linux system, any thoughts?

humble marsh
mystic light
#

I don't think so, it works fine plugged in to my windows computer

humble marsh
# mystic light I don't think so, it works fine plugged in to my windows computer

you could try copying everything off and then doing, in the REPL:

import storage
storage.erase_filesystem()

eject it cleanly
Then try it on the Linux system. That will give us some info about whether it's the system or not. Then you can copy the files back.

It's possible you have some udev rules on Linux that are forcing it to mount readonly. I have not seen that before, though. I use these boards all the time on Linux (Ubuntu) without seeing that problem.

mystic light
#

on headless systems?

#

also, I'm doing a proxmox USB passthrough to a VM, so maybe that's interfering somehow

humble marsh
mystic light
#

but you've used headless linux systems with usb/circuitpython before? I remember there's some issue with automounting if you're not running a linux GUI desktop

#

this is what I get from dmesg:

[    2.604534] scsi 3:0:0:0: Direct-Access     WIZnet   W5500-EVB-Pico   1.0  PQ: 0 ANSI: 2
[    2.604649] sd 3:0:0:0: Attached scsi generic sg2 type 0
[    2.606474] sd 3:0:0:0: [sdb] 2049 512-byte logical blocks: (1.05 MB/1.00 MiB)
[    2.607301] sd 3:0:0:0: [sdb] Write Protect is on
[    2.607302] sd 3:0:0:0: [sdb] Mode Sense: 03 00 80 00
[    2.608894] sd 3:0:0:0: [sdb] No Caching mode page found
[    2.608895] sd 3:0:0:0: [sdb] Assuming drive cache: write through
mystic light
#

in any case, the storage.erase seemed to work

humble marsh
#

yes, sometimes automount is not enabled, but you should be able to mount r/w manually

junior edge
#

Hey there, I'm currently having an issue using luma.oled with spi. I believe I have the device and ID setup properly, yet I keep getting this error :/

image.png
steady rose
#

what does ls /dev/spi* show?

junior edge
junior edge
#

Sorry for the late response, I have been busy with school all day

#

ok so I did some misc other things in the misc configs file and got the code not crashing when I set the devices to = 0. How do I ensure that the devices are correct?

#

Also is there a chance I got the cabling messed up?

junior edge
#

Ok I think I wired it wrong, redid it, but still nothing appears. Is there anything else I need to ensure I did to get IPS working?

#

Im running a slightly modified version of what the docs tell me to run

image.png
junior edge
#

VCC:1
GND:6
SCK:26
SDA:24
RES:22
DC:18
CS:11

junior edge
#

so for some reason now I keep getting an error where luma is just not found??? I chose to wipe my Pi (was already running another project), did a fresh install with a minimal pi setup, installed the library, and now it gives me an error saying luma isnt found

#

I try to manually install the luma module and I keep getting the error. Issue arises from the first import in the code I sent

#

this is super infuriating

ornate bluff
#

Would a SATA power port's 5V rail provide enough power to run a raspberry pi

broken shuttle
ornate bluff
#

Hmm it seems like the spec provides for 2A of power, and both the USB spec and the SATA spec specify +- 5% so I think it would work, but I'm not sure if there's something else that would influence that

broken shuttle
#

2A is not enough.

#

A lot of PSUs can easily power 3 or 4 drives, but not many drives will draw that much from the 5V rail.

ornate bluff
#

How much is enough for a pi? I thought the stock USB adapter was a 2 amp one

#

It's a pi 4 if that changes anything

broken shuttle
#

Pi 4 needs 3A I believe.

#

Pi 5 needs 5A.

wraith grove
#

At this point I might suggest "can use up to".

broken shuttle
#

RPi 4 and 5 are both known to have frequent brown-out issues.

#

And are very sensitive to anything below 5V.

strong barn
#

"The Pi4B requires a good quality USB-C power supply capable of delivering 5V at 3A. If attached downstream USB devices consume less than 500mA, a 5V, 2.5A supply may be used."

#

I'm not vouching for that one specifically, just an idea of what you might look for

cunning quarry
#

Hey guys, would anyone know how to setup a GT-U7 for a raspberry pi raspbien bookworm?
It's wired already, but I am not too sure on the libraries and such to use.
I have tried this already --- sudo apt install gpsd gpsd-clients python3-gps -y, is this correct?

Any pointers to the correct path to get this GT-U7 gps would be appreciated, thank you!

zenith crystal
cunning quarry
#

Ok cool so I assume "pip3 install adafruit-circuitpython-gps" would be acceptable for the GT-U7 I'll try this out.

mystic light
#

they recommend pip install using a virtual environment, but there's nothing wrong with sudo apt install python3-<python package>, and lots of 3rd party applications depend on that functionality. It's just that many python packages aren't in the apt repository

tidal magnet
mossy barn
#

Tyyyyy

#

I’ll have a look in a second

mossy barn
#

You cant use a dc motor directly on a pico right @tidal magnet

#

I think i have a l298n module somewhere lol

tidal magnet
steady rose
#

^^ good info there. yep, not directly. at a minimum, need an h-bridge.

#

or i guess a transistor for single direction on/off style control

strong barn
#

the pimoroni motor shim makes things super easy

#

for motors on a pico

humble marsh
rancid knot
#

Hi! Hopefully someone can assist me. I bought the Voice Bonnet and have been following Kattni's guide to help me get this to work on a RPi Zero 2 W. I've followed the directions but the Zero just locks up trying to build the kernel. I've tried several times. I'm using the latest build of Bookworm. Do you know of any way I can get this to work? I feel like I've wasted my money.

humble marsh
#

not sure if that is true of bookworm in general

#

but why did you mention the kernel?

#

I don't see anything about kernel changes in the guide

rancid knot
#

Yes. I hope it is not and is only specific the the RPi %

#

The kernel build for me came with the command line of "sudo ./install.sh" but I'm not sure why.

#

I was a little worried when I saw that but thought it was part of the install.

humble marsh
rancid knot
#

This applies in the first one. 🤷 It's odd because the kernel that comes with bookworm was much newer than what was being built so that's why I'm here.

humble marsh
rancid knot
#

I did look there but couldn't find an answer. I will open a thread but hoped that I could get help here. JP always says we can "Ask an Engineer" in Discord. I don't see that here . . . . . yet.

humble marsh
#

For now, I think a thread there is your best bet. The warnings I showed above indicate that there is some attention being paid to this, though maybe no fix yet. The official support people are in the forums. DIscord is all community and casual support by Adafruit engineers when we have time.

rancid knot
#

I will do that then. Thank you for your time.

strong barn
#

@rancid knot I have the equipment and was running it just fine last year, but that was before bookworm. Maybe try going back a version for the time being?

fickle rose
#

So looking at a zero 2 w how would i use that u.fl footprint, just solder it on and bridge those pads? Or would something need to be done to the built in antenna

image0.jpg
humble marsh
strong barn
#

I got the parts in to try and do the same thing! I am just afraid of sneezing off those tiny resistors while setting up

rancid knot
#

I am hoping that if the Linux OS continues to evolve that @keen ridge and/or @lost wolf would update the Voice Bonnet instructions so this doesn't happen. Lady Ada and Co. has been so excellent in providing the best support for the companies products.

mossy barn
#

is there any documents on circuitpython and relays?

#

relais*

rancid knot
#

In reference to my message above I was able to get this to work on my Raspberry Pi Zero 2 W. An addition to the documentation would be "When using a 64 bit CPU you can get this to work with the Raspberry Pi OS Lite (64-bit) Bullseye release NOT the Bookworm release." I did get this to work after just a couple of weeks of trial and error.

humble marsh
mossy barn
#

thanks bud

strong barn
#

For the RPi 5, has anyone come across a less clunky charger? Or ideally, a multi-port USB charger that supports the correct 5v5a profile?

modern matrix
#

you should be able to get away with 3A if you don't have any USB peripherals or other power draws attached, I think. otherwise, yeah, might need that 5A.

broken shuttle
twin helm
#

and i recall it needs stricter voltage regulation than required by the USB VBUS spec?

broken shuttle
#

Significantly stricter

twin helm
#

ugh why not do actual USB-PD and have a switching regulator on board?

broken shuttle
#

Even a 12V barrel jack would have been better than what they did.

strong barn
#

They said something about cost and board space tradeoffs, but I don't remember the details

# 
“Both the PMIC and the power supply support the USB Power Delivery (USB PD) standard. With USB PD there’s a little serial interface running over the power cable. You talk to the power supply, it starts off at five volts, but then you ask it: ‘what voltages do you support?’. And it says: ‘I support all these voltages.’ Usually it’s five, nine, 15, 20 volts if you’ve got a PC one. We could have just used a standard PD supply, get nine volts at three amps, but then you have to do the voltage conversion on the board. That costs you area, it costs you silicon, it costs you efficiency. So, we decided to do something a little bit non-standard, which is what we often do in search of performance, and create a five-volt, five-amp profile for our power supply. That means you don’t need all that conversion, but it can still support the board, and if you’re using the new supply we can support extra USB current downstream compared to Raspberry Pi 4. Or more HAT current.
#

I know there's a PoE hat out there, I think there are efforts to make other power option hats

#

but hey, maybe someone at adafruit will see this and decide to produce a hat (or similar hardware) that can add a barrel jack, PoE+ support, and/or other power options

broken shuttle
#

(I need to sleep, so I can't pick apart their logic at the moment, but suffice it to say I disagree with the tradeoffs they made.)

modern matrix
#

When using a standard 5V, 3A (15W) USB-C power adapter with Raspberry Pi 5, by default we must limit downstream USB current to 600mA to ensure that we have sufficient margin to support these workloads. This is lower than the 1.2A limit on Raspberry Pi 4, though generally still sufficient to drive mice, keyboards, and other low‑power peripherals.

https://www.raspberrypi.com/news/introducing-raspberry-pi-5

#

(that 600mA is the total budget shared across all USB ports when using a 15W power supply on a Pi 5)

#

if you needed more than 600mA for your USB devices, you could use a 5V 3A supply for the Pi 5 and a separate power supply for a powered USB hub (one that doesn't backpower the host), and I bet there are multi-port chargers that can provide both power supplies in one device that are easier to source than the rpi 5A one

strong barn
#

the only problem (and I don't know if it is, because I haven't tested) is that I am planning on using various hats, and I don't know if they'll stay inside the power budget if using an unofficial 5v3a power supply.

#

If it crashes, I'll find out the hard way 🙂

zenith crystal
#

the easy way to ensure it works is if the hat has a separate power supply, use it 😏

#

and don't try to "back power" the pi through the hat

modern matrix
#

seems like a big ask for a HAT, heh

zenith crystal
#

i have to be careful about making sure everything is powered off when "doing stuff" because a lot of hats will also power the pi, so like my crickit will leave the pi "on" if i don't turn it off as well (and yeah, it doesn't work that well once you attach any motors or the like 😀 )

tight ridge
tight ridge
tight ridge
hushed vortex
tight ridge
tight ridge
solemn finch
hushed vortex
ornate bluff
#

Should I get a Pi 5 instead of using my current Pi 4 for a NAS? I'm planning on running NextCloud and Jellyfin (with no transcoding)

zenith crystal
#

nah -- you're good (i'm running Jellyfin in Docker on a Synology 2-core NAS)

faint sparrow
broken shuttle
zenith crystal
broken shuttle
#

Yep, plus it's easy to get a ~10 year old PC for free.

#

Even the Pi 5 is heavily IO-constrained.

ornate bluff
#

I already have a pi 4 and the hdd sitting around, and got a usb HDD enclosure cheap on fb marketplace

#

I think it has room to house the pi inside the enclosure with the drives, but cables are a nightmare. In the past I'd heard you shouldn't power a pi through the 5V GPIO pin because it's not fused or something like that - is that still true?

#

If it is, I see on the schematic that VBUS on the USB-C connector is conected directly to the 5V rail, which is on the GPIO. So maybe the fuse doesn't show on the reduced schematic?

#

That could make sense, actually, since that would explain why there are 3 test points along the VBUS -> 5V rail connection

#

should I solder onto one of those test points, then?

bitter marten
#

Hey everyone, would this be a good forum to post a question on getting a kernel module to work on raspberry pi? The discussion forums related to raspi and device drivers seem to be relatively few and I’m looking for some troubleshooting tips.

broken shuttle
ornate bluff
#

The HDD enclosure I have is powered separately since it's for 3.5" drives

broken shuttle
#

Well, that's better than powering it from the pi at least.

torn trench
dusk grotto
#

Hey so I was doing research online and I can't find much on what I want to do. but does anyone know how I could flash a external SD card with a raspberry pi image from raspberry pi lite I have the image installed on the lite distro now I just need to flash it.

#

Alright update I may have found something it may not work but it's worth a shot.

zenith crystal
#

i would imagine you could just get one of the usb "drive" dongles that takes SD cards (they're like $10 USD)

dusk grotto
#

Yeah I have that my PC is not working gotta troubleshoot shoot it so all I have to flash the SD card is my Raspberry pi lite so I have one of the SD card reader things and the distro installed I just can't find out how to flash the SD card in the reader from the command line

#

(my command line knowledge is... Not the best I try)

dusk grotto
zenith crystal
#

ah, that i can help with

#

first, as root, do fdisk -l to find where your USB drive is (don't mount it) -- it will probably be something like /dev/sdxx - then, still as root, do dd if=file.img of=/dev/sdxx bs=4m status=progress to copy the image you want

broken shuttle
#

make sure it is the right disk

dusk grotto
#

Alright this is gonna be a stupid question how would one scroll up and down in the terminal I would have expected it that it would be Ctrl + shift + pgup but no

zenith crystal
#

try just shift-pageup (i don't know that terminal you're in, so guessing)

dusk grotto
#

Hmm.... That's not working either

#

Hang on I'ma look on google

#

Well that's a slight issue...

#

Everything online says a hift page up and down

#

Shift*

#

Alright so I ran lsblk and that gave me a out put that fit the terminal it looks like it's on sdb

zenith crystal
#

of=/dev/sdb

strong barn
#

if you don't have to interact with the output, you can pipe it to less, eg fdisk -l | less and that will allow you to scroll up and down with the arrow keys

#

but you have to quit less to do whatever comes next

dusk grotto
#

I don’t want to mess up in this part should I decompress the file or keep it compressed? I would assume decompress right?

dusk grotto
#

Right now the file is (lots of text I’m not typing out).img.xy

zenith crystal
#

yes, decompress -- you want the raw img file

dusk grotto
#

Alright thanks.

novel pasture
#

hi
i'm having trouble running the pitft scripts on raspberry pi os bullseye
whenever i try to run the install script, it throws me an error that says:
`Traceback (most recent call last):
File "/home/astroclock/Raspberry-Pi-Installer-Scripts/adafruit-pitft.py", line 11, in <module>
import click
ModuleNotFoundError: No module named 'click'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/astroclock/Raspberry-Pi-Installer-Scripts/adafruit-pitft.py", line 13, in <module>
raise RuntimeError("The library 'Click' was not found. To install, try typing: pip3 install Click")
RuntimeError: The library 'Click' was not found. To install, try typing: pip3 install Click`
the problem is, i already have Click installed

novel pasture
#

nvm i think i fixed it

#

failed to use sudo or something like that

mystic light
#

forgetting sudo is generally about 10% of my failures in Linux 🙂

young sage
#

I am trying to lower power on a Raspberry Pi 4B so I can use it with an 1A 5V power supply. This is my /boot/firmware/config.txt currently:

image.png
young sage
#

still runs at 47-50C with this configuration

broken shuttle
strong barn
#

3A 5V is pretty much required? I'd go go a zero 2 or 2w if you need the lower power draw and that still has the IO/connectivity you need.

#

you can try things like setting the governor for lower power:
sudo cpufreq-set -g powersave

broken shuttle
modern matrix
#

though I also think chasing the lowest power consumption for any SBC is fun and worthwhile. sometimes you need particular board features (like the Pi 4/5 ability to do USB device mode and host mode simultaneously), but your CPU/RAM requirements are just about nil.

modern matrix
#

looks like you've already done good things to lower power consumption. if you don't need 3D or video, you could also comment out the VC4 driver line and use tvservice after boot to disable HDMI. Jeff Geerling notes setting maxcpus=1 on a Zero 2 W to cut consumption, too, which might work on a Pi 4. it doesn't seem to shut off the extra cores, but keeps them idle, so it will limit spikes but may not reduce idle consumption.

tired radish
#

Hi, I'm having issues with the board module: When I ran a basic script on my rpi 3b to test my moisture sensor connected to a mcp3008, I got an error message

#

AttributeError: module 'board' has no attribute 'SCK'

#

so I ran another script to see what attributes are included in the board module

#

just print(dir(board))

#

I got this:

#

['builtins', 'cached', 'doc', 'file', 'loader', 'name', 'package', 'spec', 'board']

#

this looks nothing like what I saw in the the adafruit website guides, I'm missing a whole bunch of attributes

#

any ideas?

ruby night
tired radish
#

I used some other guide, this might be it thx

tired radish
#

Just finished the guide. When I ran the test script to see everything's in order, the issue reoccurred

#

I still have missing attributes - only these are available ['builtins', 'cached', 'doc', 'file', 'loader', 'name', 'package', 'spec', 'board']

ruby night
#

hmm — do you by any chance have a file named board.py in the subdirectory you are working from?

tired radish
ruby night
#

that explains it — Don’t use board.py 😉

tired radish
#

loll cool thx I'll see if that fixes it

ruby night
#

You cannot have a script with the same name as any Python module or library that you import

#

or else it will use the local file instead of the module.

ornate bluff
#

I shut down my raspberry pi 4 via SSH and now after unplugging it and plugging it back in it no longer appears on the network... Any ideas? I don't have a mini HDMI adapter to see what it's doing

#

It also doesn't seem to be getting a DHCP lease from the router, but the green ACT light is blinking like it normally would on a boot

#

Also the ethernet port LEDs are lit, and according to OpenWrt there's traffic on the port

ornate bluff
#

I switched it out with a Pi 3 and the issue went away... Is it probably just a bad board?

ornate bluff
#

solved it: it was a poorly configured fstab waiting for /dev/sda2 to appear, but in the pi 4 I was plugging in a USB thumb drive which was /dev/sda and my HDD was getting mounted as /dev/sdb instead. Oops

broken shuttle
tired radish
#

Hi, I'm having issue trying to get my soil moisture sensor to work with my raspberry pi 3b and mcp3008. I've set up the wiring and properly installed all the libraries that I need by following adafruit guides. When I run the test code I get this:

image.png
#

when I squeeze the sensor with a wet towel I get a very short and slight change of voltage like : 3.25765...V

#

the sensor is connected to 3.3v circuit, could that be the issue? Do I need a lower voltage? I couldn't find the sensor's specs on the web...

#

this is the sensor

rn_image_picker_lib_temp_18671256-92a2-490a-a8cb-c37e33cdf507.jpg
#

it says it requires 5v... tried just that and now the code output is locked at 3.3v

#

perhaps the mcp3008 cant read these high voltages, while the sensor requires voltages that are too high?

wraith grove
#

It doesn't scream "I need 5v" to me, But I don't have the full schematic of that board.
Someone smarter than me might be able to guess if that is a transistor and if it is designed to give a inverted response to conductivity.

tired radish
#

hi I figured it out just now, apparently I need to get a 3.3v to 5v llc ... I gotta do some homework lol

torn trench
#

I think I was also disappointed by my soil moisture sensor performance, but maybe I had something wrong with my setup

#

Maybe these sensors are well known and there will be useful instructions online. Otherwise I would (1) consult the sensor datasheet to try and find any information on typical output ranges and performance information, and possibly test with a multimeter or something if possible (2) hook the ADC up to known voltage sources to make sure it's working as expected

obtuse leaf
#

Hi, I got an ESP32 NodeMCU board with an ESP32-WROOM-32 from a workshop but didn't manage to get to the sessions. I couldn't find a bin file for this specific board to setup circuit python. I am trying to install circuit python so that I can use my adafruit SCD40 sensor. I haven't done microcontroller projects in ages. Can anyone lead me to the correct bin file and any examples or guide to do this? Thank you!

image.png
zenith crystal
obtuse leaf
split mist
#

Hi, I have an issue with driving neopixels using my Raspberry PI 3+. I am driving 12 WRGB LEDs at the moment and trying to get them to update their colors at roughly 60hz/fps. The issue is that the processing time it takes to update the 12 pixels takes on average over 16ms (60hz) already (averaging around 17.5ms). I am using python with the adafruit libraries: https://learn.adafruit.com/neopixels-on-raspberry-pi/python-usage

The code I am calling is to calling is as follows:

import board
import neopixel
from time import sleep, perf_counter
import time
pixels = neopixel.NeoPixel(board.D18, 12, bpp=4)

current_time = time.time()

iterations = 0
max_iterations = 500
process_times = []
#loop_times = []

for x in range(max_iterations):
    process_time = time.time()
    pixels[0]=(0, (x * 3) % 255, 0,0)
    pixels[1]=((x * 3) % 255, 0, 0,0)
    pixels[2]=(0, 0, (x * 3) % 255,0)
    pixels[3]=(0, (x * 3) % 255, 0,0)
    pixels[4]=((x * 3) % 255, 0, 0,0)
    pixels[5]=(0, 0, (x * 3) % 255,0)
    pixels[6]=(0, (x * 3) % 255, 0,0)
    pixels[7]=((x * 3) % 255, 0, 0,0)
    pixels[8]=(0, 0, (x * 3) % 255,0)
    pixels[9]=(0, (x * 3) % 255, 0,0)
    pixels[10]=((x * 3) % 255, 0, 0,0)
    pixels[11]=(0, 0, (x * 3) % 255,0)
    
    pixels.show()
    new_time = time.time();
    process_times.append(str((new_time - process_time) * 1000))
    #loop_times.append(str((new_time - current_time) * 1000))
    current_time = new_time

for x in process_times:
    print (x)

(apologies for the messy code)

Are updating neopixels really that slow? Am I missing something here?

NeoPixels on Raspberry Pi

How to control NeoPixel LEDs with Python on a Raspberry Pi!

humble marsh
# split mist Hi, I have an issue with driving neopixels using my Raspberry PI 3+. I am drivin...

You can compute (x * 3) % 255 once and save it in a variable. On a Pi 3 that may not make any difference, though.

auto_write is on by default, and so each assignment to pixels[] will cause a refresh. But you are calling .show() explicitly. You don't need to do that if auto_write=True. Or, set auto_write=False in the NeoPixel() constructor. That will make it update just once instead of 12 + 1 itimes.

split mist
#

I will set autowrite= false explicitly in the constructor

humble marsh
#

hmm, that is not what I would expect

split mist
#

I don;t know why I assumed autowrite was disabled, must have been another issue with the code originally.

humble marsh
#

glad it's working better!

split mist
#

I have a strange new issue now, I am trying to run a video using VLC in the background whilst the neopixels animate. The video runs fine by itself in VLC, the neopixels animate fine by themselves now a 60hz, but when I combine the two at the same time the neopixels turn random colors.

I am using the most basic code at the moment for the neopixels (turn the first 3 pixels red) and am not controlling the video using python, it is just running in the background already when I execute the script controlling the pixels. I suspect the data signal being sent to the pixels is getting corrupted somehow due to the video being run on the pi?

Could this be a power issue? my pixels are being powered by an external power source which is solely dedicated to powering the pixels, I am also using a 74AHCT125 chip to convert the data signal from 3.3V to 5V for the pixels.

#

(I also have a 470ohm resistor before the first pixel's data input and a large capacitor across the external power source)

zenith crystal
#

that's a lot to be asking of a Pi 3, so it could be timing -- also, are the grounds connected? kind of hard to tell from the picture

split mist
#

Okay even stranger, if I run a python script to set one pixel to red and then quit immediately (leaving the pixel red) then start the video in VLC, the video plays with the pixel staying red but there is visible artifacting appearing as lines across the entire screen.

last mist
# split mist I have a strange new issue now, I am trying to run a video using VLC in the back...

Hey Jcx. I work a lot with neopixel strips and high school students and see problems like this a lot. As you suspected, the problem students encounter is often power. It works fine with 5-10 neopixels but they don't respond properly when thay up it to 50 pixels. Maybe they look all white or one or two pixels have color (the wrong one). While it looks like maybe a data probolem, I have never had to use a level shifter for data. Adding a power supply that adds higher amperage usually solves the problem. What we often to is add a cheap 5V USB wall power supply, strip a junk USB cable to get power and ground - put the red wire to 5V on the neopixels and connect the ground to both neopixel strip GND and the microcontroller GND. Raspberry Pi 3,4,5's already suck down a lot of power, I have to resort to adding an extra power supply all the time.

split mist
last mist
chilly zealot
#

I plan on building the PiGRRL 2 with a bigger screen upgrade and initially planned to use a 3.5” DPI Waveshare screen. But I saw that DPI uses a lot of GPIO pins (20-28), which might not leave enough pins for the gamepad PCB.

I was considering switching to an SPI display since that’s the type of display the original guide uses (Adafruit PiTFT) since it uses fewer GPIO pins.

Would switching to an SPI display be a better option or would it not matter?

It was suggested I ask my question here instead of help-with-projects.

zenith crystal
#

SPI uses a lot fewer pins, but you may have some code wrangling to do to switch interface types (i'm not familiar with the libraries in question)

turbid rivet
#

It looks like the build uses retropie, which shouldn’t be a problem reconfiguring. The main tradeoff in using a DPI display would be the inability to use the gamepad PCB; you’d have to replace that with a USB controller of some sort.

calm cairn
#

I believe also you could just use a shift register inbetween the the pi and the controller pcb.

There are a few spi pins that can be shared, like the clock ones can be shared with the clock on your shift register.

#

Shift registers are how old school game controllers worked. LIke the nes, snes, and gb.

Also when it comes to the pitft screens they are great, but their "tutorials" on adafruit do mention about their refesh rate having a hard time with some retro emulators.

#

It specifically mentions snes

broken shuttle
#

SPI peripherals are basically just a couple of shift registers.

turbid rivet
#

It would be a considerable design effort to implement a shift register between a pi and the gamepad pcb that’s designed for the GPIO header.

broken shuttle
#

Easy, but also painfully slow.

#

(unless you use the dedicated SPI peripheral)

junior edge
#

Hey so Im trying to use the luma oled library with python on a rpi zero to make a watch, however after wiring together some buttons the display now outputs pure white

#

its running an ssd1309 128x64 oled display

#

following this wiring guide it worked perfectly but then I soldered on the buttons (no connections touching) and its just pure white

ssd1331-oled-display-raspberry-pi-connection.png
#

im running the test.py program I wrote

#

the "splash.png" is just this

image.png
junior edge
#

nvm

#

I just realized my whole debug rectangle filled everyting in with white

wise compass
#

Does anyone know of an SBC that is pi-zero form factor with displayport, 4gb ram, and can run android?

turbid rivet
wise compass
modern matrix
#

you might be able to use a DisplayLink USB display, which only needs USB 2+ and a driver on the. Pi, or a USB DisplayLink adapter that translates to DisplayPort, instead of alt mode.

zenith crystal
#

you can get 3DoF (and better) with several chips/breakout boards that work with a "pi zero", so you have at least the motion sensing and HDMI out

broken shuttle
modern matrix
#

oh yeah, it's not great, but it might solve the problem.

#

that page says they crash if you boot with a DisplayLink device attached, though it's a knowledgebase and maybe it's out of date. that's a pretty bad bug.

wise compass
#

Nice! Thanks for swarming, I think at this point I may have to take @zenith crystal 's suggestion and do 3dof on my own and just use the dock that comes with the XR glasses (it's bulky but does hdmi->usb-c) I saw some boards with DP Alt mode but they are as big as the dock, also noted that rpi-cm4 has the capability just need to expose it via the carrier board. So may take a prototype -> build my own board approach.
Thanks again for the suggestions. I'll also drop this link which was super helpful in my research: https://hackerboards.com/?video_displayport_slots=1

Search - Board-DB: The Single Board Computer Database

With over 450 active entries, Board-DB is the largest online database and comparison tool for single board computers (SBCs), computing modules (SoMs), and dev boards.

broken shuttle
#

I'd look for one with the USB-C altmode

wise compass
#

I almost put this in wearables but figured that with DP becoming more prevelant that our SBC's would have them.

modern matrix
#

oh, this is for a single particular display device. not much choice, then.

wise compass
fickle rose
#

Anyone have images of the raspberry pi 5 board without the components? Just the PMIC corner works

#

I’m trying to track where a trace goes

fickle rose
#

Nvm trial and error got it

smoky bramble
#

im using a luckfox pico mini b, apt-get -y upgrade and apt install always end up giving this error

image.png
smoky bramble
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i solved it caveman mode by resizing /run, now im trying to upgrade the system

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so far no errors but if anything happens i can just reinstall the system 😎

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no errors!

smoky bramble
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ok now unrelated to what i posted above
i am trying to install Blinka on the luckfox pico mini with pip install Adafruit-Blinka, but every time i try to install it i get this error:

📎 message.txt
zenith crystal
#

what does uname -a say?

#

just out of curiosity, i was checking out the luckfox docs and you can't use Blinka on this -- they have their own Python libs of how they're creating the hardware interfaces -- in other words, this is kinda linux, but more like on Android, not a "real" raspberry pi

smoky bramble
#

or what the cool kids would say:

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(the time might be slightly off)

smoky bramble
# zenith crystal just out of curiosity, i was checking out the luckfox docs and you can't use Bli...

someone already got it werking and is listed on the blinka website
https://github.com/adafruit/Adafruit_Blinka/issues/796

GitHub
These are very inexpensive and I think would be good boards to supp...

https://www.spotpear.com/index/product/detail/id/1413.html Is a link to the board. They are nice small boards that have a nice CPU and a fair number of GPIO and camera interface. Would love to be a...

#

maybe i should try the luckfox python library

zenith crystal
#

i'm ... quite surprised it's listed as armv7, so that shot that idea

dusky fjord
#

Hello, is it possible to use circup along with blinka?

vocal lava
humble marsh
dusky fjord
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Thanks

smoky bramble
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@zenith crystal this is the thing thats has been causing me all the issues, sysv-ipc

image.png
smoky bramble
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its not even needed bruh

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hours of trial and error

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i could have been playing games or reading

cedar wing
#

Good morning, I am starting in the world of the raspberry pi, and after having made small labs with leds, I want to get the temperature and humidity of my room. For this, I have bought in Alliexpress DHT22 sensor.
I have seen and tried many tutorials, but I can't get any values. I always get the error: DHT sensor not found, check wiring.

I am using a Raspberry Pi 5, and the python library adafruit_dht, as I have seen that some others do not work for the rb pi 5. As I said, I have tried several codes and none of them work. For example this one from https://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging/python-setup does not work for me: https://pastebin.com/LBLbGmaK .

The wiring I think is ok, I attach images. The resistor is 10K and I have also tested the 3.3V and 5V voltages offered by the board, and different GPIOs.

Do you know what I could be doing wrong, maybe the sensor is defective? I hope you can help me! Thank you very much!

AP1GczNTXjEgmo9UzYroO9jCjpYPemKvia-p8W-dbyXqZbzU4ZMHHrG27-Gh_ww709-h945-s-no-gm.png AP1GczOMqe0mY99i6R9G7ljTVjZXhTcKOHEeTArY9Yr-9rGW02XyrNkFSBD-dQw709-h945-s-no-gm.png AP1GczPPu5Qkb2g2XY9ncq9oTk0IXarml_YqnakNTvdj4H0DoRXxKKGeMyo1wQw709-h945-s-no-gm.png AP1GczODKA_StW8ikM6inksxjcBUxw6bUWQrkVKY_WYc6kXxz9WUjj05hyY3Sgw709-h945-s-no-gm.png AP1GczPghQKryzw0-aJaJ-XfW4DUGFWhCglczV30kUEkpFG4FTMZVXDo-J8rDww709-h945-s-no-gm.png AP1GczMyxDB5NHBLuzuHLRGVw335gSn6dKKiMkiaeUazsk08JlnpD2RQrVPxUww709-h945-s-no-gm.png pi.png image.png
DHT Humidity Sensing on Raspberry Pi or Beaglebone Black with GDocs...

Humidity and Temperature Logging From Your Pi or Beaglebone Black to the Cloud!

Pastebin
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries# SPD...

Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.

steady rose
cedar wing
#

Okey! Maybe I`ll try buying another sensor

smoky bramble
#

succesfully installed blinka after modifying setup.py to remove the forsaken library

image.png
smoky bramble
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spoiler alert it doesnt work

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it returns an error related to gpiod

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and installing gpiod also returns an error

smoky bramble
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i ended up solving my issue by installing blinka as sudo and running python as sudo too

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it doesnt give me any errors at least so i hope its working

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i do feel like sudo shouldn't be necessary

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but it do werk so whatever

glacial glade
#

anyone here have experience with Java on Raspberry Pi for hardware projectds?

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trying to make a minimal mp3 player like project and i only know java. I could probably run a circuitpython script on the side just for a few buttons right?

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my line of thinking is that i use pi4j and install circuitpython alongside it, and have both a circuitpython script and the main java project run from boot simultaneously

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circuitpython just handles a few input devices pi4j doesnt have libraries for and java i guess somehow grabs integers from that script?

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sigh, itd be so easy to relearn python and do it all in circuitpython...

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shame im addicted to OOP

hardy plaza
# glacial glade shame im addicted to OOP

Python is OOP. I've been a professional Java developer since the mid-90s and didn't find learning Python all that difficult. Most of the same things you understand in Java are directly applicable in Python. Even some of the syntax is similar at a high level (i.e., not lexically).

If you plan to interact with hardware on SBCs or MCUs you'll benefit from learning Python and/or C.

glacial glade
#

fair enough

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can circuitpython do video if it's on a raspberry pi and not a pico? the fact it can run bare metal is so tempting

humble marsh
zenith crystal
#

There is another Java library for Raspberry Pi that has a lot more device support (note that I'm a contributor) -- www.diozero.com -- but as Ichiro noted, going from Java to Python isn't that hard (you do have to grind your teeth quite a bit, though -- in my opinion)

broken shuttle
#

Python is "throw crap at the wall and see what sticks". It does have some OOP features, but its object model is... odd.

hardy plaza
#

I dunno. I’ve actually been really enjoying working with Python. I’m not going to get into criticism of a programming language, which is somewhat of a sport amongst the IT crowd. When working with a Raspberry Pi or using CircuitPython or MicroPython, it’s a great language for quick prototyping and developing small applications. I find it fun!

hardy plaza
fickle rose
humble marsh
smoky bramble
#

wuh

#

i was going to reply to someone but the message just got deleted

faint sparrow
#

@smoky bramble (if I can ping you...)

smoky bramble
#

Were you able to login via ssh over usb?

faint sparrow
smoky bramble
#

Ah
Im not really good at this but i was going to suggest you look into hiw to turn the pi into an ethernet gadget (theres a module named g_ether that does this) so that your main pc detects it as an ethernet RNDIS device thingamabob, once that is done you can share your internet connection with the pi, theres an option in the control pannel for this

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I may be forgetting something but thats how its done... i think

smoky bramble
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I think if you edited /etc/modules and changed or removed g_serial to g_ether usb ethernet should start working

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Then you would have to configure a static ip

faint sparrow
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Bruh about the dual Ethernet sbc, chatgpt generated me a working config in two minutes.
Surprising how half the times makes up things, the other times, it just gives you the solutions

smoky bramble
faint sparrow
#

Hi there, I want to build a keyboard using a sbc, my problem is how to adress an USB on debian. Apparently circuit python on linux does not handle usb comunication so I cannot use it

hardy plaza
faint sparrow
hardy plaza
faint sparrow
zenith crystal
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on linux-based computers like this one, you can use the CirPy libraries with the Blinka layer and "regular" Python libraries to use the USB ports

hardy plaza
# faint sparrow It's an orange pi based on the RK3328

Well, that’ll certainly make your life more difficult than a Raspberry Pi. I believe there might be an smbus implementation for Armbian. I tried an Orange Pi a few years ago but it’s in a box now so I don’t really know what a Debian distro for it supports.

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You might also check out orangepi_PC_gpio_pyH3

faint sparrow
hardy plaza
#

I think he just means CircuitPython

faint sparrow
#

Ah, about orangepi_PC_gpio_pyH3 , it's for another soc isn't it? I'll check up anyway thanks

hardy plaza
#

Last time I checked the most hardware support for an Orange Pi was on Armbian, but as you’ve found, once you get into the alternate fruits and vegetables the support quickly gets a lot more sparse.

tame axle
#

I have 2 RPI 3B+ devices. I can plug in the first to my PC fine without issue. The second always kills the PC, although it works fine if I connect before PC power up. I tried different microUSB cables too. Any ideas whats going on?

hardy plaza
analog halo
#

From earlier messages, It appears that the goal is for the sbc (OrangePi) to be seen as a keyboard by the PC. That will need more than just connecting with a cable. Need to change the SBC USB from 'host' to 'device', and have it supply appropriate device descriptor information. No idea what that takes for the OrangePi. I know it can be done with some of the boards that support CircuitPython.

tame axle
hardy plaza
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One is for power, the other is for serial communication.

zenith crystal
hardy plaza