#help-with-linux-sbcs

1 messages · Page 25 of 1

civic rune
#

The gear icon

#

I'm thinking it didn't stick because in the setup menu, it insisted that the default name/pw were in effect and I must change them.

olive haven
#

You mean the setup stuff in the GUI?

civic rune
#

yup

#

also in the GUI when I went to change the password, it didn't challenge me to provide a password.

olive haven
#

I don't have a display on this PI. Once I figured out how to enable VNC, I VNC'd in and started through that dialog. As soon as it told me I still had the default password, I exited out of the setup. Logged in again via ssh and still had the pw I had set.

civic rune
#

hmmm

#

what software did you use to VNC?

olive haven
#

VNC Viewer by RealVNC Ltd. (I'm on a Mac), it was a free download (some time ago)

civic rune
#

mk, I'm just considering developing on the pi over SSH and wondering if VNC would be better

olive haven
#

I've mostly done Pi stuff via SSH; I'm pretty used to command line Linuxy stuff.

#

I only started using the desktop version of Pi OS a year or so ago when I wanted to have a small touchscreen on the Pi for a project.

civic rune
#

I've just got to work something out with the IT fella, ports are blocked all over the place

olive haven
#

You mean there's a firewall between you and the Pi?

civic rune
#

seems to be?

#

I can access the network on the pi, and on my PC, but the two cannot speak

olive haven
#

So how are you even getting to the Pi? Display & keyboard?

civic rune
#

yup!

#

I'm using it like a fairly poorly performing computer

olive haven
#

I'm so tempted to say "how quaint" -- please forgive me

civic rune
#

it's OK

#

It's easier for me to develop python this way

#

And to see the file system.

#

But I get that it's not particularly l33t

olive haven
#

well, it's partly I don't have a convenient monitor & keyboard to use with the Pi's.

#

Once I learned about setting them up for ssh and wifi -- which the new Imager makes SO much easier -- I just went with that

civic rune
#

we're like the Gifts of the Magi: I have a convenient M&K setup but no usable network. You have inverse

#

Actually that's not gifts of the magi

#

I forget what it is

olive haven
#

I saw you talking about editors somewhere; what'd you end up using

civic rune
#

I'm just going with Geany, it's what shipped and it's...fine?

olive haven
#

haven't used it. Mostly when I need to edit files on the pi, I use nano, and it's ... ok?

#

But it works over SSH in a terminal window as well

civic rune
#

yeah you can't use Geany in the CMD line

olive haven
#

would you be comfortable with ssh/sftp if you could talk the IT guy into opening up the requisite ports? Or VNC (I don't actually know what port(s) that needs)

civic rune
#

I'm comfortable getting comfortable

olive haven
#

not sure I follow

civic rune
#

I'm comfortable starting the process of learning what I need to learn

olive haven
#

ah

#

Well, one of the advantages of being able to work from your PC would be a wider choice of development environments.

#

Plus the kind of easy backup that entails.

#

But if you're getting along ok on the Pi, don't let better be the enemy of good

civic rune
#

I think I'll look at my deadline for my next project, after this project is done, and see what I think I have time for in terms of learning curves

olive haven
#

In raspi-config there was a place to set up the resolution of a VNC GUI, and another place to enable VNC connections -- no other software needed on the PI

civic rune
#

thx!

#

Having a weird pygame issue. No sound is coming from the speakers connected to my pi. I've also tried playing the .mp3 with the built in mp3 player on the pi, and no dice. The .mp3 plays on my PC just fine

west sierra
civic rune
#

Let me check. I should note that pygame worked fine to play this exact MP3 on another device

west sierra
#

Ah, weird. Maybe it's missing a decoder?

civic rune
#

6.8 MiB

west sierra
#

that's a chonky mp3

civic rune
#

Not sure about bitrate, idk how to tell that

west sierra
#

you even have a sound card on that Pi that can output that? ahhaha

civic rune
#

I think so?

west sierra
#

let's find out the bitrate, one sec

civic rune
#

Actually the other pi was a different model...

#

3B+ I think

west sierra
# 
sudo apt install -y mediainfo
#

then you can run mediainfo on that mp3 to find out the deets

civic rune
#

unable to install some stuff

#

Let's see if it works

#

$ mediainfo fails to bring anything up

west sierra
#

nothing, no errors, no ... just new command line prompt?

civic rune
#

command not found

#

I got a bunch of errors when installing that it was failing to install stuff

west sierra
#

that's a COMPLETELY different result than "fails to bring anything up"

civic rune
#

you're right, it's near end of shift, I ahve a sleepy

west sierra
#

lol

#

it's just like... all kinds of engineers just forget to troubleshoot when they are the "customer." It's like... did you even power it on and off?

#

so, wait, what are you running on the Pi, which OS?

civic rune
#

Raspbian bullseye, latest.

#

foudn it

#

VLC player has a button for codec info

west sierra
# 
$ sudo apt install mediainfo
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
libmediainfo0v5 libmms0 libtinyxml2-8 libzen0v5
Suggested packages:
mediainfo-gui
The following NEW packages will be installed:
libmediainfo0v5 libmms0 libtinyxml2-8 libzen0v5 mediainfo
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 2,148 kB of archives.
After this operation, 7,532 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://deb.debian.org/debian bullseye/main arm64 libmms0 arm64 0.6.4-3 [32.1 kB]
Get:2 http://deb.debian.org/debian bullseye/main arm64 libtinyxml2-8 arm64 8.0.0+dfsg-2 [28.8 kB]
Get:3 http://deb.debian.org/debian bullseye/main arm64 libzen0v5 arm64 0.4.38-1 [94.9 kB]
Get:4 http://deb.debian.org/debian bullseye/main arm64 libmediainfo0v5 arm64 20.09+dfsg-2 [1,912 kB]
Get:5 http://deb.debian.org/debian bullseye/main arm64 mediainfo arm64 20.09-1 [80.2 kB]
Fetched 2,148 kB in 0s (6,282 kB/s)
Selecting previously unselected package libmms0:arm64.
(Reading database ... 35620 files and directories currently installed.)
Preparing to unpack .../libmms0_0.6.4-3_arm64.deb ...
Unpacking libmms0:arm64 (0.6.4-3) ...
Selecting previously unselected package libtinyxml2-8:arm64.
Preparing to unpack .../libtinyxml2-8_8.0.0+dfsg-2_arm64.deb ...
Unpacking libtinyxml2-8:arm64 (8.0.0+dfsg-2) ...
Selecting previously unselected package libzen0v5:arm64.
Preparing to unpack .../libzen0v5_0.4.38-1_arm64.deb ...
Unpacking libzen0v5:arm64 (0.4.38-1) ...
Selecting previously unselected package libmediainfo0v5:arm64.
Preparing to unpack .../libmediainfo0v5_20.09+dfsg-2_arm64.deb ...
Unpacking libmediainfo0v5:arm64 (20.09+dfsg-2) ...
Selecting previously unselected package mediainfo.
Preparing to unpack .../mediainfo_20.09-1_arm64.deb ...
Unpacking mediainfo (20.09-1) ...
Setting up libmms0:arm64 (0.6.4-3) ...
Setting up libtinyxml2-8:arm64 (8.0.0+dfsg-2) ...
Setting up libzen0v5:arm64 (0.4.38-1) ...
Setting up libmediainfo0v5:arm64 (20.09+dfsg-2) ...
Setting up mediainfo (20.09-1) ...
Processing triggers for man-db (2.9.4-2) ...
Processing triggers for libc-bin (2.31-13+rpt2+rpi1+deb11u2) ...
civic rune
#

yeah it didn't do none of that for me

#

Oh

west sierra
#

just ran that on a Pi CM4

civic rune
#

so

west sierra
#

what did it do?

civic rune
#

I lost wifi

#

lol

#

let's try that again

west sierra
#

Just imagine me right now... smacking you in the head with a giant foam hammer while you are doing this

civic rune
#

lol

west sierra
#

lol

#

jiggle the cable

#

oops, no wifi.... hahahahhaa

civic rune
#

well I now have mediainfo but VLC gave me the data

west sierra
#

cool, what was the bitrate?

civic rune
#

192 kb/s

west sierra
#

that's super high

#

like, what/where is this file supposed to be played by?

civic rune
#

just your normal stereo speakers/amp

west sierra
#

You got some hifi speakers with a tube amp or something?

civic rune
#

I didn't set this up, this is inherited stuff

west sierra
#

but, you said pygame

civic rune
#

mhm

#

it's outputting to an mid-range amp and some OK speakers, nothing fancy

west sierra
#

what is it outputting?

civic rune
#

bunch of sounds

#

Music

#

other stuff

#

music needs to be clear but nothing really crazy hi fidelity

west sierra
#

OK. I am going to go out on a limb here, that you could probably go down to at least 128 Kbps

#

possibly lower

#

I would test it

civic rune
#

let me figure out how to do that

#

there are a bunch of dodgy sites for it

#

ack! gotta clock out, I'll have to tackle this tomorrow

west sierra
# 
ffmpeg -i input.mp3 -codec:a libmp3lame -b:a 128k output.mp3
#

something like that

#

perhaps

#

then you can tweak down to 128k and 96k and play it and see if there's any difference...

#

I am not a hifi guy, and the only thing I really notice going below 128k is bass will be weaker... but, then again... I don't know your exact use case, but can guess.

civic rune
#

The better sounding the better but amazing quality sound that won't play is useless

west sierra
#

just go full flac, highest bitrate possibly

#

buy some $50,000 speakers and a $100,000 amp

#

depending on the environment... a perfectly balanced room that's been acoustically calibrated will sound amazing, but a cafe or a large place where there's ambient noise... almost nobody's going to hear the difference, and those that do, will not care.

#

talking voices can often be downsampled quite a bit compared to something like a song by Jinjer for instance 😄

faint sparrow
#

In the bash man page, the idea of Job Control is discussed.

man_1_bash_job_control_fg_bg-a.jpg
#

My fingers do it so fast I don't remember doing it, but I'm fairly sure a fg <$pid> brings a background task back to the foreground.

#

iirc Control Z was often bound to tty-based programs (ncurses probably as well) as a way to .. I don't know .. suspend them I think it was called.

#

Same mechanism probably works when you append a '&' to a command line.

#

It's pretty rare for me to want to bring one of those back to the foreground; my techniques have changed more towards sending signals instead (inter-process communications iirc).

#

$ kill -SIGHUP <$pid> maybe .. been a while since I've thought about it.

#

$ man 7 signal

#

$ man 7 svipc is a proper reference, I think, to inter-process communications (I don't know if signals are related or not)

olive haven
#

@civic rune Just to expand on what @faint sparrow pointed out, if you (inadvertently or no) put a process in the background by hitting ctl-Z, you can foreground it again with a simple fg command. If you have several processes in the background, you can get a list of them with the jobs command. Each one will have a number in front of it, and you can bring back say number 1 with fg %1; a simple fg will foreground the most recently backgrounded one (which will have a + after the number).

civic rune
#

Cool! Thanks folks!

shadow prism
#

Can someone here help me with enabling SSH over USB with the Raspberry Pi Zero on Windows? I followed the normal instructions (add dtoverlay=dwc2 in config.txt, modules_load=dwc2,g_ether in cmdline.txt, touching SSH), yet I cannot SSH over raspberrypi.local. Interestingly, Windows detected it as a RNDIS/Ethernet device before concluding that the Zero was a USB Serial one...

civic rune
#

Anyone have pygame experience? I'm reading the API docs for pygame.mixer.music and am not finding an easy way to do what I want. I'm trying to profile some code that does stuff while a pygame song plays and also does stuff after the music ends. I'm trying to record when the song ends. I think set_end_event() is what I want but I'm unclear about how the event queue works

deep pawn
#

using a pi to connect to an adc to a thermistor. googled a lot and read about wheaton bridges. so i am trying to follow this circuit diagram in the attached picture. this is my first time using a breadboard or doing any circuitry/electronics stuff. before i turn on the pi, is this safe or will i blow up one of the devices? thanks for any tips /advice

schematic.png
rotund pivot
#

Maybe it's old and I never noticed it? Raspberry Pi Imager can set up wifi and ssh automagically. Very handy.

civic rune
rotund pivot
#

I just did Lite, so ssh keys let me in.

#

Is this really necessary?After this operation, 1,599 kB of additional disk space will be used. Do you want to continue? [Y/n] Y

#

KILOBYTES

#

lol that used to be a lot

olive haven
civic rune
civic rune
civic rune
#

So when I run my script, which uses RPi.GPIO, I get warnings when I do

GPIO.setup(pinNumber, GPIO.OUT)

that the channel is already in use. I think I can stop this by running GPIO.cleanup(), but I'm looking for a way to tell if the warning is going to be given before I call GPIO.setup(), so I know to call cleanup(). Thoughts?

steady rose
# 
 if RPi.GPIO detects that a pin has been configured to something other than the default (input), you get a warning
#

so if gpio_function returns something other than GPIO.IN, that seems to be the same as triggering the warning

#

(can also turn off warnings)

civic rune
#

I considered turning off the warnings, but I don't like doing that unless I have a really deep understanding of the consequences

#

hmm another weird issue: when using pygame, when I check the type of pygame.mixer.music.get_pos() with:

>>> type(pygame.mixer.music.get_pos())

I get

<class 'int'>

but when I use testing code like

time = pygame.mixer.music.get_pos()
if not isinstance(time, int):
  print("NOT AN INT")

I always get

"NOT AN INT"

as output

#

Nevermind, I see what I did, it was silly

civic rune
#

hmmm I've found a bug but I don't know who to report it to: Adafruit or Raspberry Pi. When I plug in my AW9523 breakout using the female header -> stemma QT cable, my pi shuts down and/or stops working properly. I can get the pi to work properly if I pull power and re-plug it with the stemma QT cable already plugged in. Who does it seem I should bring this up to?

lost wolf
#

Wait... in what order? You shouldn't be plugging stuff in when it's powered on, it can short or cause issues even if you're careful. If I'm reading what you said properly, then that isn't necessarily unexpected.

civic rune
#

ah ok

#

well silly me

lost wolf
#

I2C isn't hot swappable, even though STEMMA QT really makes you want to do it.

turbid rivet
#

Certain I2C sensors may be okay if you ensure ground is connected before power, but the physical StemmaQT connector is absolutely not capable of this...

civic rune
#

Mk! thanks folks

#

Learned something new

turbid rivet
#

If the Pi is shutting down as a result of connecting power, you're probably getting an inrush strong enough to cause a brownout condition. I imagine your AW9523 is already loaded upon connection, so you should absolutely only connect/disconnect while power is off.

civic rune
#

It's not loaded but the inrush could be enough I guess

tired marsh
#

though it only mentions a stuck bus recovery

civic rune
#

I don't need to do hot swapping, I can just power down. Thx tho

civic rune
#

the pins 0 and 1 can be used for I2C on the pi right? I think I see that they are usually used for EEPROM on a hat, but if I'm not using an official hat and I want to use the default I2C pins for something else... there's nothing really preventing me from using 0 and 1 for I2C, correct?

#

I'd need to do something like:

import board
import busio

i2c = busio.I2C(board.D1, board.D0)

?

#

ah that didn't work

turbid rivet
#

Pi 4? There should be like 6 I2C peripherals available. IIRC, you do need external pullups on anything outside of i2c-1.

civic rune
#

pi3

#

I'm connecting to adafruit breakouts so there are pullups

steady rose
#

does the need for using the standard i2c pins for something else out way the mild complexity you'll add by using non-default i2c?

civic rune
#

One of the default pins for I2C has an alternate function that wakes the pi from a halt state when you pull it low. I'd like to have that functionality available. It's not mission critical but I would like it

steady rose
#

there's a software i2c overlay you can use. i think on any gpio.

civic rune
#

I can always pull power and re-plug but that's inelegant

steady rose
civic rune
#

It seems like it's equal complexity to use either the alt hardware I2C or software overlay. What are the downsides of using the alt-hardware?

turbid rivet
#

I believe you can use it for your app if you're not using the Pi camera or Pi display, and avoid the HAT EEPROM address. However, you will still need external pullups for i2c-0 or any software i2c overlay.

steady rose
#

^^ yep

civic rune
#

I am not using a display or camera so no issues there

steady rose
#

only specific pins can be used. it's a manual mapping inside blinka.

turbid rivet
#

Does it need to be enabled in boot/config.txt?

steady rose
civic rune
#

I used board.D1 and board.D0, those are labeled on pinout.xyz as the pins to use

#

hmm

steady rose
#

try using the extended bus library

#

you'd enable in config.txt, then ref by number

civic rune
#

I will if I just can't get this to work but I'm confused as to how I can pass in port 0 to the busio function since it doesn't take that as an argument

#

but seems to require that information

steady rose
#

you can't pass in port number with busio. it determines it based on the pins passed in.

civic rune
#

but it isn't working for some reason

steady rose
#

what isn't working?

civic rune
#

I run

i2c = busio.I2C(board.D1, board.D0)

and get

ValueError: No Hardware i2c on (scl, sda) = (1,0)
Valid I2C ports: ((1, 3, 2), (0, 1, 0))
steady rose
#

ls /dev/i2c*

#

what does that show?

civic rune
#

oh man, if it turns out that I just forgot that this is fresh install again...

#

/dev/i2c-2/

#

I enabled it and now I have:
/dev/i2c-1 /dev/i2c-2

steady rose
civic rune
#

I'm on pi 3

steady rose
civic rune
#

what is that else elsing?

#

this one

unknown.png
steady rose
#

pi3? hmm....the output looks more like it thinks it's a BCM2711.

civic rune
#

ooh for/else I hadn't seen before

steady rose
#

wondering how it got this output...

Valid I2C ports: ((1, 3, 2), (0, 1, 0))
umbral sable
steady rose
#

yep. so not hitting exception.

#

but that list is for the BCM2711

#

oh...nvm.

#

was think it was dumping lower down

#

for BCM283x

#

so why didn't this work?
i2c = busio.I2C(board.D1, board.D0)

civic rune
#

I'm much confuse

steady rose
#

oh. it probably did hit the exception when it tried to open.

#

but it just passes

#

so finally exhausts the iterator

#

you'll need to have /dev/i2c-0

civic rune
#

Seems like a good case for a PR to add more checking

#

I'll see if I can understand enough to do that

#

I guess I'll have to use software I2C

steady rose
#

your only options via blinka/busio on the pi3 (or any BCM283x pi) are:
/dev/i2c-1 on SCL/SDA (D3/D2)
/dev/i2c-0 on D1/D0

civic rune
#

oh I can't do software i2c?

steady rose
#

sure. then you'd use the extended bus library.

civic rune
#

ah ok

#

What do you think of that forum post?

steady rose
#

like that

#

seems ok i guess. those pins have always been "reserved for HATs. do not use"

civic rune
#

so does extended bus work with any GPIO? It seems not

steady rose
#

i think so? i'd avoid ones like the SPI bus if possible.

civic rune
#

the docs aren't super clear on that

#

ones ec

steady rose
#

it'll exist once you create it

#

need to add overlay to config.txt

civic rune
#

hahh ok

#

*ahh

#

let me pull up my board and find some convenient GPIO

#

thx for your help!

steady rose
#

looking for good ref. always have trouble finding it.

civic rune
#

I've looked into it before

steady rose
#

it's simple. once found.

civic rune
#

how could I figure out what /dev/i2c-2 is hooked up to?

steady rose
#

dtoverlay=i2c-gpio + stuff to define pins and bus num

# 
Name:   i2c-gpio
Info:   Adds support for software i2c controller on gpio pins
Load:   dtoverlay=i2c-gpio,<param>=<val>
Params: i2c_gpio_sda            GPIO used for I2C data (default "23")

        i2c_gpio_scl            GPIO used for I2C clock (default "24")

        i2c_gpio_delay_us       Clock delay in microseconds
                                (default "2" = ~100kHz)

        bus                     Set to a unique, non-zero value if wanting
                                multiple i2c-gpio busses. If set, will be used
                                as the preferred bus number (/dev/i2c-<n>). If
                                not set, the default value is 0, but the bus
                                number will be dynamically assigned - probably
                                3.
# 
dtoverlay=i2c-gpio,i2c_gpio_sda=23,i2c_gpio_scl=24,bus=4
#

something like that

civic rune
steady rose
#

try it. those are spi pins. so may conflict if spi is enabled.

civic rune
#

ahh let me re-configure then

#

I am going to try pins 4 and 17

#

@steady rose It's working great, thanks!

woven cargo
#

I was wondering if someone would be able to help me install circuit python onto a raspberry pi zero

half fractal
#

Greetings! I am trying to send mnemonic code (characters) from a raspi to a USB device. I am trying to do this with /dev/ttyUSB0 and /dev/ttyAMC0 Would anyone mind pointing me in the right direction?

tired marsh
half fractal
tired marsh
#

you can ask here, there are people who can help

half fractal
#

thank you

tired marsh
#

most programming environment would have the ability to send data to a serial port, it's usually as simple as writing to a file

#

I'm curious, do you have a link to the product you are using ?

half fractal
#

I'm brand new to raspi as I've been using circuitpython boards for projects previously, now I need the device to show up as a USB host.

#

I don't have a link to it, I can't find the device for sale, I had to look up the datasheets on all the IC the board uses just to figure out what it does

civic rune
woven cargo
#

Has anyone ran into this issue with PWMOut is not defined?

woven cargo
umbral sable
#

Looks like it's probably failing to import the pwmio library from Blinka:try: from typing import Union, Optional from pwmio import PWMOut from digitalio import DigitalInOut except ImportError: pass

tired marsh
#

yeah, but blinka is installed or it would error on import micropython

#

I'm not entirely sure how to use Blinka in Mu on a Pi, I assume it uses the system's python ? in doubt, try updating blinka from a terminal

sudo pip install -U adafruit-blinka
woven cargo
#

Still no luck.

tired marsh
#

you could check that you don't have a local file or directory named typing or pwmio, which would cause python to load the wrong one, other than that I don't know what could be going wrong

brave sparrow
#

I'm planning a project with the eink bonnet (https://www.adafruit.com/product/4687) on a Pi 2 B. The I2C port is spoken for, and I'm looking for other GPIO options. The inside terminals of the buttons map to pins 29 and 31, can I just solder to those pads to use those pins for externally-powered sensor input?

eink_bonnet_buttons.png
Adafruit 2.13" Monochrome E-Ink Bonnet for Raspberry Pi

Easy e-paper finally comes to Raspberry Pi, with this bonnet that's designed to make it a breeze to add a 2.13" 250x122 crisp monochromic eInk display. Chances are you've ...

turbid rivet
olive haven
nova oyster
#

Hey all. I am looking for some help debugging an issue that I just got seemingly out of nowhere.

#

I am attempting to send data from my pi to Ubidots and am getting an odd error. My code runs fine one time, but then upon attempting to send the next set of data a minute later I get a whole slew of errors relating to new connections.

#

My Code:

temp.png
brave sparrow
# turbid rivet The I2C port can support multiple devices on a single port, so long as 1) the ad...

It's for air quality monitoring, I have a PMA003I (https://www.adafruit.com/product/4632) on the I2C port, and I'm trying to figure out how to connect a MiCS5524 (https://www.adafruit.com/product/3199). It looks like I also need to connect to the Pi's pin 2 or 4 to power the sensor, one of the ground pins, and level shift down to 3V (https://www.adafruit.com/product/3877) so I don't fry the GPIO pin. I also need to connect to Pi's pin 1 for the level shift. Is that all there is to it? Do I also need a current-limiting resistor between the level shift and the GPIO input pin?

CO_sensor_connection.png
Adafruit PMSA003I Air Quality Breakout

Breathe easy, knowing that you can track and sense the quality of the air around you with this Adafruit PMSA003I Air Quality Breakout. This sensor is great for monitoring air quality, ...

74AHCT14 - Logic Level Inverter / Level Shifter

Sometimes you feel low, and sometimes you feel high - cause your logic levels are opposite to what they should be! But this easy-to-use inverter chip will flip that frown upside-down.This ...

turbid rivet
brave sparrow
# turbid rivet Oooh, that one is not an easy one to use with a raspberry pi. The Pi has no ADC ...

There's an I2C ADC (https://www.adafruit.com/product/4648) in stock, but I'd still have to get the sensor down to 3v, right? Could I just use a couple of resistors as a voltage divider into the ADC?

Adafruit PCF8591 Quad 8-bit ADC + 8-bit DAC - STEMMA QT / Qwiic

Measuring voltage and adjusting it is what electronics is all about so you won’t get far without friends like the Adafruit PCF8591 Quad 8-bit ADC + 8-bit DAC combo.  Analog ...

turbid rivet
brave sparrow
turbid rivet
brave sparrow
turbid rivet
plush wave
#

Hi all just need a little help with my hid keyboard setup.
When I press and hold a button it will repeat but has a slight pause then carry on then slight pauses again. Any ideas

turbid rivet
vocal steppe
#

Hi there !
wondering if someone here has some experience using Buildroot, more specifically how to go from using "apt-get" calls to install stuff on existing RPi distro to instead selecting specific 'Target Packages' ( I can't figure out which package I'm missing to run VLC || OMX & get a h264 mp4 file played :/ .. )
thanks 🙂

plush wave
turbid rivet
#

Circuitpython on a pi pico? #help-with-circuitpython
Probably something causing a delay in your keyboard code, but the guys over there might be able to help more.

humble marsh
faint sparrow
#

Can I program my Pi Pico in RaspOS' built in Mu?
If so, do I choose CircuitPython or Python3?
(alternatively, does Adafruit have any guides for programming the Pies in Circuitpython?)

#

Oh wait, wrong room, I see.

humble marsh
faint sparrow
#

Thanks, @humble marsh danh. I previously made some small projects on adafruit circuit express boards, but didn't know that Mu also work with Pico.
Got halfway started with Thonny, but it doesn't seem to have the nice libaries available with Circuitpython, so that was an easy choice 🙂
Already a couple of pages into the intro.
Thanks for sharing your insigts.

simple flame
#

hey is the pi 3 b+ usb ports 5v pin hooked directly to vcc?

turbid rivet
ruby bolt
#

Hello, I have inherited 3 LED panels. P2 indoor 128 x 256 each. I done some Googling and it looks like there is no way to drive these panel with simple RPI hats. I have found an LED Controller Novastar receiver card which has a Ethernet Gigabit port. There are "Sending Cards" in the very expensive category. Is there a way to drive these panels using a RPI and Hat or Receiving card?

unknown.png
wet falcon
#

Question. I have a Pi zero W hotspot. Can I hook two different power sources to the ports at the same time and unplug the other? Like switching from portable to shore power without powering off?

turbid rivet
tame canyon
#

Looking for a consultant for a specific issue involving current and voltage monitoring with a Raspberri pi/ads1115.

Please PM me.

wet falcon
rotund pivot
#

usb to only the data port (the inner connector) from a host will also power it

wet falcon
#

So my question stands, can I plug in a power source to both ports simultaneously and disconnect the other without frying it or turning it off?

mystic spindle
#

"If you have already installed the kernel module, you will need to remove it by editing your /boot/config.txt file before proceeding"

#

Im editing and I can't find any reference to SPI or Kernel in the config

#

its just to use board.SPI() from the blinka packages

simple flame
#

did you enable SPI through raspi-config?

old parcel
#

heya ya'll!~ i'm a beginner with electronics (rasberry pi, dupont cables and the rgbw ring from ada)

but i'm having issues with getting to talk from the pi to the ring

see: https://www.reddit.com/r/adafruit/comments/t07qgq/how_to_setup_the_neopixel_ring_16_x_5050_rgbw/?utm_source=share&utm_medium=web2x&context=3

tldr:
i can't seem to use the adafruit library, i believe it's missing support for the rpi 4b v1.5? but i'm not sure about this

reddit
r/adafruit - How to setup the NEOPIXEL RING - 16 X 5050 RGBW LEDS o...

1 vote and 2 comments so far on Reddit

faint sparrow
#

That steers you to Blinka

old parcel
old parcel
#

Where can I find the progress on making the lib 64-bit compatible?

mystic spindle
rotund pivot
mystic spindle
#

Cheers, Ill try to source a similiar product from Australian stock if I can

#

4 wire SPI?

rotund pivot
#

I believe so, it just plugs onto the headers, there are also some buttons on those

#

it's the same display as some standalones that are SPI that I also use with CircuitPython on MCUs

mystic spindle
#

hopefully

#

the next perogative I have is that it needs to be less than 50mm wide on one side, I'm helping a mate with his diorama using the display as a cyberpunk billboard

rotund pivot
#

oh, cool!

mystic spindle
#

kinda niche 😅

rotund pivot
#

pretty small, and very crisp display

mystic spindle
#

wow thats very tempting

#

right side is where its going

#

bottom pic

#

i mean

#

and top is kinda what hes thinking

rotund pivot
#

dang that is so cool and realistic, incredible detail

mystic spindle
#

haha cheers, Hes an amazing artist, Helped me with coding project logos for my portfolio. So im helping him with this 😛

rotund pivot
lost wolf
#

Depending on the breakout, if you're careful, you could pull the display off the breakout being SUPER careful not to tear the cable, and then put only the display on the outside, and run the cable through the window or something, and put the actual PCB inside the building. In theory.

mystic spindle
rotund pivot
#

in future hopefully we'll see more EYESPI displays, and controllers with EYESPI

mystic spindle
lost wolf
mystic spindle
#

I dont really wanna touch c as well

lost wolf
mystic spindle
#

Pi Zero 😛

#

I usually just ssh and sftp for everything

lost wolf
#

Did you try running CircuitPython libraries? I don't think we have an ili9225, but I absolutely know we have ST7735.

#

You'd pip install adafruit-blinka which then allows you to use CircuitPython libraries on Raspberry Pi.

mystic spindle
#

Ya I tried both the circuitpython one and the normal adafruit_st7735 one

lost wolf
#

Hmm.

#

The latter of those two is probably deprecated at this point.

#

But the CP one should have worked. Is it an Adafruit display?

mystic spindle
#

had some github commits like 9 days ago

lost wolf
#

(You may have already answered all of this, apologies if so.)

lost wolf
mystic spindle
#

I love any help that I can get hahaha

lost wolf
#

Oh, no, Arduino one is Adafruit-ST7735-Library.

#

Nm.

#

It's possible whatever display breakout you have isn't compatible for some reason, if it's not an Adafruit display.

mystic spindle
#

apologies both circuitpyton

#

one from adafruit-circuitpython-st7735 and one from adafruit-rgbdisplay > st7735

lost wolf
#

I feel like it should be, but hardware can be weird.

#

AH! Ok, that makes more sense.

#

Wait, is it a ST7735 or an ST7735R?

#

Because they're apparently different enough that we have separate libraries for those two.

mystic spindle
rotund pivot
#

it may be some different init sequence is needed

mystic spindle
#

IC just says st7735 I guess

lost wolf
#

Yeah I see that.

mystic spindle
#

I wish I can buy direct from adafruit but only US stores

#

And Aus stores are mostly in our eastern states other side of Australia

lost wolf
#

Yeah, unfortunately direct is US-only. We have resellers though, are there none near you?

mystic spindle
#

I guess I dont mind paying shipping just not international rates

#

I believe they are an adafruit reseller

lost wolf
#

Yep!

mystic spindle
#

perfect

lost wolf
#

Should only take a few minutes to test, and if it doesn't work, you're not any further behind than you currently are.

mystic spindle
#

Perfect will do

#

If I could describe the behaviour with the curent ones

old parcel
#

Is there an issue I can track for 64-bit support for adafruit blinka?

mystic spindle
#

When I triggered a script and set the display image, I put a delay for each frame written, On the Display's backlight, It would flash everytime I would send a write signal?

lost wolf
mystic spindle
#

super interesting

#

both libraries

old parcel
lost wolf
#

@mystic spindle What is your code?

lost wolf
mystic spindle
#

one sec ill get the gist

mystic spindle
#

even tried from board.SPI() into busio and assigning the clk and mosi but still no luck

#

just same flash behaviour

lost wolf
#

Hmm. I was hoping there would be something obvious causing the backlight flashing. But there is not.

mystic spindle
#

its like a very minor flash

#

like u cant detect it with a camera but a human eye can see it

lost wolf
#

I mean the fills could be responsible. But that seems unlikely.

#

Yeah, it's tough getting images with things like that.

mystic spindle
#

and yeah also same exact behaviour with the adafruit_rgb_display libs

lost wolf
#

That's the one you sent me.

mystic spindle
#

different one

lost wolf
#

Ah

mystic spindle
#

one I sent is most recent try

lost wolf
#

Is the baudrate right?

mystic spindle
#

originally had it for 640000

lost wolf
#

Ok

#

So you've already tested others there.

mystic spindle
#

I tweaked that setting a bit with no effect

lost wolf
#

Ok

#

😕 I'm not sure what to tell you.

#

I don't suppose you have a CircuitPython-compatible microcontroller sitting around..?

#

Which is only useful if you haven't soldered the display to the Pi. But still worth asking.

mystic spindle
#

Ive only got some arduinos laying around but Ive never used em

lost wolf
#

I'm no help with Arduino anyway. If it doesn't work, I'm useless for troubleshooting.

#

It's not my usual realm.

mystic spindle
#

me too hahah

lost wolf
#

Graphics stuff sometimes baffles me though. And with the hardware being a potential variable in this, it's difficult to troubleshoot.

#

There isn't even an old Python version of that library to have you try separately.

mystic spindle
#

Yeah I had an I2C project that went so smoothly, but my first foray into SPI

#

im into 2 displays and 4 different driver libs hahaha

lost wolf
#

Yeah... at some point, there's an issue elsewhere.

#

Are you certain those pins are right? Wait, you used MOSI and MISO so yeah.

#

Are you certain you wired it up properly?

#

What power pin did you use?

mystic spindle
#

tried both 3.3 and 5, both displays said they could take either

lost wolf
#

Ah ok. I'm pretty sure we always go with 3.3 on Pi for the Adafruit stuff, even when they can take both.

#

I mean, obviously it's getting power if it's flashing, but sometimes that means spurious signal.

mystic spindle
#

cs on gpi08 ce0, GPIO23 for rst and 24 for D/C or RS

lost wolf
#

I think those can be whatever.

#

So that's probably fine.

#

Wait, CE0?

mystic spindle
#

and clk and mosi wired correctly

lost wolf
#

I thought all the pins were GPIOx

mystic spindle
#

CS or GPIO08 SPI_CE0_N

lost wolf
#

Ah ok

mystic spindle
#

ill try the st7735r lib in the morning, Im praying it will work hahaha

#

for best compatibility, any ideas for a search on this store?

#

currently just doing PI TFT

lost wolf
#

Oh um...

#

That won't get you the breakouts, I think.

mystic spindle
#

maybe SPI LCD?

ruby night
lost wolf
#

Look for Adafruit TFT maybe.

#

That popped a few for me.

#

There's two pages for that search.

old parcel
lost wolf
mystic spindle
#

Awesome thanks so much kattni, Can I ping you for any future problems? sorry to be annoying

lost wolf
lost wolf
ruby night
lost wolf
#

Plus, I'm not great with displays. There are a few others who are far better. 🙂

old parcel
#

I’ll explain then why there’s soap lmao

mystic spindle
ruby night
old parcel
#

True, I just normally read trough the whole documentation before I start xP so if I see smth that wouldn’t work bc of my setup it saves me time (I would think)

lost wolf
ruby night
# 
Linux gjnpi400usb 5.10.92-v8+ #1514 SMP PREEMPT Mon Jan 17 17:39:38 GMT 2022 aarch64 GNU/Linux

pi@gjnpi400usb:~ $ cd projects/blinka/
pi@gjnpi400usb:~/projects/blinka $ python3 blinkatest.py 
Hello blinka!
Digital IO ok!
I2C ok!
SPI ok!
done!``` Blinka on 64 bit RaspiOS
ruby night
#

There may well be some modules that are not working...yet

old parcel
ruby night
#

Yes, that issue was resolved.

old parcel
#

https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/digital-i-o#blinky-time-2993446-16

so i did this step and everything with the blinkatest went perfect

but did realtest to get a blink doesn't seem to work, i do believe all my cabeling is correct

made it so like this person did:
https://raspberrytips.nl/neopixel-ws2811-raspberry-pi/

raspberrytips.nl
Richard IJzermans
NeoPixel Ring (WS2812) aansluiten op een Raspberry Pi • raspberryti...

Een NeoPixel (WS2811) is een meerkleurige led met een hoog contrast, de leds kunnen op een Raspberry Pi met behulp van een Python script worden aangestuurd.

Adafruit Learning System
CircuitPython on Linux and Raspberry Pi

Make hardware and interface with sensors super easy using CircuitPython

#

all show my soap setup one moment

grand sparrow
#

hello I want to create simple nodejs script for push button but it doesnt work

#

I followed this tutorial

#

and when Im holding the button nothing happens

turbid rivet
#

@old parcel If you don't solder to the neopixel ring, you'll have to apply enough sideways pressure on the wires to maintain enough connection for it to work properly.

#

Even then, it won't be very reliable. Best to solder and get a good solder sucker if you need to make changes.

old parcel
#

i'll wait a bit with that until i have a special case in (the person who send me the case also gave some wires and i wanna like style it a bit XD)

grand sparrow
#

Im using this code ```var Gpio = require('onoff').Gpio; //include onoff to interact with the GPIO

var pushButton2 = new Gpio(17, 'in', 'rising', {debounceTimeout: 10});

pushButton2.watch(function (err, value) {
//Watch for hardware interrupts on pushButton GPIO, specify callback function
if (err) { //if an error
console.error('There was an error', err); //output error message to console
return;
}
console.log("Btn2");
});```

old parcel
lost wolf
old parcel
#

(Were gonna try to apply more pressure to the ring solder points)

Oooh that’s maybe the reason why it didn’t work!

#

I’m looking online for an example to test the ring

#

But can’t find one sorry

lost wolf
#

You'll need to change the pin to match your setup.

#

Also you need to install the neopixel library.

old parcel
lost wolf
#

No worries! If you don't know what you're looking for, it's difficult to find things. 🙂

old parcel
#

yep xD

also, i believe i lost all my /lib files b/c of the moving of the lib folder sadly xD

#

have to reformat the whole os so it'll take a bit longer for me to test this out

old parcel
lost wolf
old parcel
#

mm, so pip install adafruit-circuitpython-neopixel ?

lost wolf
#

I believe so, yes

old parcel
#

oo awsome will try that out after i did the initial setup (like opening ic2 etc, and the default adafruit pip)

old parcel
#

heya, i wanted to test it again (this time, i didn't move the lib to /lib

but i get this error:

vim therealtest.py
macley@delta-pi:~/adafruit-circuitpython-bundle-7.x-mpy-20220224 $ sudo python3 !$
sudo python3 therealtest.py
Traceback (most recent call last):
  File "/home/macley/adafruit-circuitpython-bundle-7.x-mpy-20220224/therealtest.py", line 8, in <module>
    import neopixel
ModuleNotFoundError: No module named 'neopixel'

i am inside the folder of the bundle, and made a python script, but i believe i'm not importing the lib correctly

i'm normally used to use apt, or that having the project cloned fully, it'll build/work (never used a libarly like this before)

lost wolf
old parcel
#

ooo ok, i'll remove that zip asap!

but, which pip am i'm forgetting?

sudo apt-get install python3-pip
sudo pip3 install --upgrade setuptools
sudo pip install adafruit-circuitpython-neopixel
sudo pip3 install --upgrade adafruit-python-shell

(also there's no python 2/pip2)

lost wolf
#

Um.... Does it install Adafruit-Blinka when you install neopixel?

old parcel
# 
sudo pip install Adafruit-Blinka
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: Adafruit-Blinka in /usr/local/lib/python3.9/dist-packages (7.0.1)
Requirement already satisfied: pyftdi>=0.40.0 in /usr/local/lib/python3.9/dist-packages (from Adafruit-Blinka) (0.53.3)
Requirement already satisfied: Adafruit-PureIO>=1.1.7 in /usr/local/lib/python3.9/dist-packages (from Adafruit-Blinka) (1.1.9)
Requirement already satisfied: rpi-ws281x>=4.0.0 in /usr/local/lib/python3.9/dist-packages (from Adafruit-Blinka) (4.3.2)
Requirement already satisfied: Adafruit-PlatformDetect>=3.13.0 in /usr/local/lib/python3.9/dist-packages (from Adafruit-Blinka) (3.20.0)
Requirement already satisfied: RPi.GPIO in /usr/local/lib/python3.9/dist-packages (from Adafruit-Blinka) (0.7.1)
Requirement already satisfied: sysv-ipc>=1.1.0 in /usr/local/lib/python3.9/dist-packages (from Adafruit-Blinka) (1.1.0)
Requirement already satisfied: pyserial>=3.0 in /usr/lib/python3/dist-packages (from pyftdi>=0.40.0->Adafruit-Blinka) (3.5b0)
Requirement already satisfied: pyusb!=1.2.0,>=1.0.0 in /usr/local/lib/python3.9/dist-packages (from pyftdi>=0.40.0->Adafruit-Blinka) (1.2.1)

nope!

lost wolf
#

Says you already have it, it's there.

#

I don't think you're missing anything.

old parcel
#

hmm, strange (sorry i still don't see neopixel in that output)

lost wolf
#

No, Blinka doesn't auto install neopixel, other way around.

old parcel
#

oh wait, moving it to the cd ~ gives now this:

python3 therealtest.py
Traceback (most recent call last):
  File "/home/macley/therealtest.py", line 10, in <module>
    pixel_pin = board.A1
AttributeError: module 'board' has no attribute 'A1
lost wolf
#

NeoPixel auto installs Blinka.

#

There is no A1 on Pi.

old parcel
#

ooh i see

lost wolf
#

You need to update it to match the pin for the Pi that your ring is connected to

#

I have to head out. Hopefully this gets you fixed up. If not, post here and someone will hopefully be able to assist.

old parcel
#

sure thing! thank you so much for everything! i noted every singel step from the brand new os! thanks!

#

So far all the libs are in working order, it seems i'm not understanding what this error means:

python3 therealtest.py
Traceback (most recent call last):
  File "/home/macley/therealtest.py", line 10, in <module>
    pixel_pin = board.A1
AttributeError: module 'board' has no attribute 'A1

i'm using this test script to see if this ring works:
https://www.adafruit.com/product/2856

# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
#
# SPDX-License-Identifier: MIT

"""CircuitPython Essentials NeoPixel RGBW example"""
import time
import board
import neopixel

pixel_pin = board.A1
num_pixels = 16

pixels = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.3, auto_write=False,
                           pixel_order=(1, 0, 2, 3))


def colorwheel(pos):
    # Input a value 0 to 255 to get a color value.
    # The colours are a transition r - g - b - back to r.
    if pos < 0 or pos > 255:
        return (0, 0, 0, 0)
    if pos < 85:
        return (255 - pos * 3, pos * 3, 0, 0)
    if pos < 170:
        pos -= 85
        return (0, 255 - pos * 3, pos * 3, 0)
    pos -= 170
    return (pos * 3, 0, 255 - pos * 3, 0)


def color_chase(color, wait):
    for i in range(num_pixels):
        pixels[i] = color
        time.sleep(wait)
        pixels.show()
    time.sleep(0.5)


def rainbow_cycle(wait):
    for j in range(255):
        for i in range(num_pixels):
            rc_index = (i * 256 // num_pixels) + j
            pixels[i] = colorwheel(rc_index & 255)
        pixels.show()
        time.sleep(wait)


RED = (255, 0, 0, 0)
YELLOW = (255, 150, 0, 0)
GREEN = (0, 255, 0, 0)
CYAN = (0, 255, 255, 0)
BLUE = (0, 0, 255, 0)
PURPLE = (180, 0, 255, 0)

while True:
    pixels.fill(RED)
    pixels.show()
    # Increase or decrease to change the speed of the solid color change.
    time.sleep(1)
    pixels.fill(GREEN)
    pixels.show()
    time.sleep(1)
    pixels.fill(BLUE)
    pixels.show()
    time.sleep(1)

    color_chase(RED, 0.1)  # Increase the number to slow down the color chase
    color_chase(YELLOW, 0.1)
    color_chase(GREEN, 0.1)
    color_chase(CYAN, 0.1)
    color_chase(BLUE, 0.1)
    color_chase(PURPLE, 0.1)

    rainbow_cycle(0)  # Increase the number to slow down the rainbow

NOTE: i did notice the number of pixels was 8, changed that to 16. But can someone help me what i need to look for with the board missing the A1 module?

wiring is done as shown here:
https://raspberrytips.nl/neopixel-ws2811-raspberry-pi/

NeoPixel Ring - 16 x 5050 RGBW LEDs w/ Integrated Drivers

What is better than smart RGB LEDs? Smart RGB+White LEDs! These NeoPixel rings now have 4 LEDs in them (red, green, blue and white) for excellent lighting effects. Round and round and round ...

raspberrytips.nl
Richard IJzermans
NeoPixel Ring (WS2812) aansluiten op een Raspberry Pi • raspberryti...

Een NeoPixel (WS2811) is een meerkleurige led met een hoog contrast, de leds kunnen op een Raspberry Pi met behulp van een Python script worden aangestuurd.

tired marsh
#

A1 is a pin name, there is no pin named A1, what pin are you using ?

#

ah with that wiring, that would be board.D18

tired marsh
pure hill
#

Hey everyone! Just a quick question, so I bought the Adafruit bno055 IMU and I have a Raspberry Pi 3B+ running Ubuntu 20.04 (64-bit). Most of the tutorials seem outdated and so I was wondering whether I should use i2c or uart to connect to the IMU? There are some posts about an i2c clock-stretching problem, is that still a problem.

hardy plaza
#

I don't use Ubuntu on a Raspberry Pi, nor can I recommend it, but certainly the BNO055 (and BNO08x) can be connected via I2C, and there are software libraries for that purpose. I've been using various BNOx IMUs for years now, all connected over I2C and never messed with the system clock speed.

#

...put it this way: try it out and if you don't run into a problem don't mess with system fundamentals like I2C bus speed as that will effect the performance of other I2C peripherals.

ruby night
hardy plaza
#

There won't be any Python-based differences between Raspberry Pi OS and Ubuntu as they both use the Linux kernel (likely even the same version), so the only difference may be the Python version. I am aware of clock-stretching, I'm just saying that I've never done it, nor needed to. I can't comment on CircuitPython as I don't use it, only CPython and MicroPython. If you're running this on a Raspberry Pi you won't need CircuitPython as you'll be using CPython (i.e., the installed Python on the Raspberry Pi OS and Linux generally).

visual crescent
#

How do you connect a mouse and keyboard to a Pi Zero 2 W since it only has one usb input? A Hub?

hardy plaza
visual crescent
#

What kind of keyboard is suited for Raspbian that will be used mainly for coding other projects? I wanted a build a 60 percent but now am worried about needing Fn keys or the arrow keys

zinc jackal
#

Full-size is correct size.

visual crescent
zinc jackal
#

Ooof

visual crescent
#

Anyway, the question was, do I need Fn keys or the arrow keys for Raspbian Coding. I already have a Full sized keybaord at home when I actually have space lol

ruby night
#

The bno055 lib may not need blinka. It depends on its dependencies.

hardy plaza
# visual crescent Making a portable device, it's either less than full sized or non at all sadly

I use a sub-size Rapoo radio-remote keyboard with the little USB dongle so I can type into the console on the Pi with a Pi MiniTFT display. But I would never code that way.

Instead, I'd recommend remoting from a laptop or desktop into your Pi over ssh to do your coding and not connecting a keyboard to it at all. If you properly set up ssh keys you don't even need to use a password to connect. So I can open a normal terminal window on Ubuntu and ssh in securely with no password at all.

hardy plaza
ruby night
#

Blinka provides in interface to some CircuitPython "core" modules like board and busio. Glancing at the bno055 lib I don't see any use of those, so it may be just Cpython.

visual crescent
visual crescent
#

Never used Pi OS before either so idk much about the OS

#

Wanted to use the Pi Zero 2 W as a core for the laptop, figured I wouldn't need much since I only want to code on it

hardy plaza
#

Well, I've been a software developer since the 1980s. The most important thing for anyone who is going to be spending hundreds or even thousands of hours coding is proper ergonomics. That means a proper monitor whose center is just slightly below eye level, a proper full sized keyboard, and a decent mouse. You elbows should be relatively horizontal and you should not be resting your palms on the table nor your forearms even touching the table. Proper lighting. Basic ergonomics. That's probably the best advice I can give you. Your health is important. When you're young you generally think you're indestructable, and you're not. I've known several people who've blown out their wrists and can no longer type at all (and are now using voice software).

#

If you're on a Raspberry Pi you're on a Linux computer, with basically all the features of a Linux computer.

#

The Pi Zero 2 W is a fine small computer and has four cores, not a lot of memory but enough for some tasks. If you're going to use a desktop rather than console then maybe bump up to a Pi 3 B+ with a proper 1GB of memory. But you don't need a desktop environment to code on a Pi. I do all my coding from a terminal window remoting into my Pis.

#

I have a git repository and I push all my project code to github as I'm working so there's no danger of me losing my work.

visual crescent
#

Was thinking of using my phone as a display

hardy plaza
#

Would you be comfortable not having a desktop? Just a terminal window?

visual crescent
#

Maybe, worth a try. Still a good project to learn stuff either way

ruby night
#

Keeping good backups is critical -- I try to never assume my code will be there when I come back after I power off a Pi or a Microcontroller..

hardy plaza
# visual crescent Maybe, worth a try. Still a good project to learn stuff either way

Yeah, sure. Coding is a combination of your skills and your tools. The better you get with both the better a coder you are. But those tools can be almost anything. I spend the vast majority of my time on my own projects in Python using a vi editor, for my day job using Java inside an Eclipse IDE. Very different environments, very different tools, same brain. As you gain experience you layer new things onto the old.

visual crescent
hardy plaza
visual crescent
#

Yes, no WiFi

hardy plaza
#

How big a display do you plan to use?

visual crescent
#

I would need internet for a remote thing, right?

hardy plaza
#

Yes, you'd need WiFi or an Enternet connection to get to the internet.

visual crescent
hardy plaza
#

iPhone or Android?

#

I think you're going to find using your phone very difficult. You'd be better finding the largest HDMI display you're comfortable carrying with you.

#

In any case, I just realised it's very late here so I've got to head to bed.

visual crescent
hardy plaza
#

So in summary, if there's no internet you're not going to have access to software libraries or updates, no ability to push your code to a safe repository or backup. Not while you're at the restaurant, but when you get home you can. I'd say use an HDMI display, a radio-style USB keyboard. If you are console only (recommended on the limited power of the Pi Zero 2 W) then you won't need a mouse. When you get home you can ssh into the Pi from a laptop or desktop and from the Pi itself push your code to github or at least archive a copy of your code regularly to a proper backup medium.

I sometimes code while on a train using a MacBook 12, one of those tiny laptops. No connection. So when I do have a connection I'm updating and downloading libraries, getting set up for no connection while on the train. When I get home at night I sync everything back up.

#

'night

visual crescent
#

Do F keys(F1,F2) and Numberpad/Arrow-keys become a necessity in coding or something, still confused about that bit

hardy plaza
#

If you're using a console you'll seldom if ever need function keys as they're mostly a desktop feature. You will want arrow keys though. Most small keyboards have arrow keys, though some make you hold down a modifier to use them, which is annoying. If you can get a keyboard with proper arrow keys get that.

#

My normal keyboard is a Cherry MX BOARD 3.0S, just today replacing an earlier SteelSeries 6Gv2 whose keys finally gave out. I use MX Black mechanical keys, which are loud but fast. I find even the MacBook frustrating to type on, and those tiny portable keyboards just too difficult to do anything apart from type commands and things, never code. But you're certainly welcome to try.
https://www.cherry-world.com/cherry-mx-board-3-0-s.html

CHERRY MX BOARD 3.0 S

Expect to win!

Accessories MX BOARD 3.0S

#

anyway, it's 3:05am so 'night finally

visual crescent
#

Making a custom keyboard, so I should be able to do everything that's needed, only problem was knowing what was needed. Thanks, I'll integrate a arrow-key ouo

mystic spindle
#

@visual crescent Just get a pi 400

#

literally built for what ur describing

visual crescent
mystic spindle
#

what dev do u plan on doing

#

anything visual or web you can kiss that goodbye on a pi zero

visual crescent
mystic spindle
#

That should be fine as long as u can run console only

visual crescent
opaque wagon
vapid python
#

I do a lot of work on my pis over ssh using an old Chromebook w Linux on it. It's much more streamlined (no wires), gets me a large display for cheap, and still has good battery life.

opaque wagon
vapid python
#

No idea where you are located, but in the US you can get an old Chromebook like the c720 for the same price or less than a Pi4 (which aren't in stock anywhere)

visual crescent
visual crescent
vapid python
#

You don't need internet to ssh. You could create a wireless hotspot (for a network connection) on the pi itself, your phone, or even use a serial cable

#

With the pi zero you can even setup networking over the USB OTG port

visual crescent
#

Oh, that's what you meant 😄

trim umbra
#

does anyone know if there are animation libraries that handle animations on the raspberry pi in python or do i need to calculate them out myself

umbral sable
trim umbra
old parcel
old parcel
#

@tired marsh @lost wolf @ruby night thank you all so much for your help!
when i fixed the script i noticed i was getting the same error i had with this lib:

https://github.com/jgarff/rpi_ws281x

luckily another guy added some code into a PR and by compiling that and using the included demo it worked in one go!

https://github.com/jgarff/rpi_ws281x/pull/492

i do really hope it's possible to merge this pull as i can't wait to use the script outside of that cloned project and continue experimenting!

are there more example scripts i can read trough to come up with how to like time my lights etc? (like don't play after 11pm, or use a static one light, or slowly transition from one color to the next forever?

Again thank you all for this, i'm really happy that the ring works! and given the intense light... well i'm sure 3.3v is more then enough to drive them XD my eye's still hurt haha (also the 64-bit warning can be removed from the official docs maybe? correct me if i'm wrong!)

GitHub
GitHub - jgarff/rpi_ws281x: Userspace Raspberry Pi PWM library for ...

Userspace Raspberry Pi PWM library for WS281X LEDs - GitHub - jgarff/rpi_ws281x: Userspace Raspberry Pi PWM library for WS281X LEDs

GitHub
Support for RPi4 4GB v1.5 by bbeesley · Pull Request #492 · jgarff/...

Adds support for the 4GB pi 4 v1.5 based on the details provided in the comment here

lost wolf
# old parcel <@!199811382793863168> <@!330227457296957440> <@!343570430042308609> thank you a...

The Adafruit Learn System has a lot of NeoPixel examples. Most are RGB, but you can make them RGBW by following the explanation in the first guide link I sent you. (Basically adding another tuple member at the end of the RGB number, i.e. (255, 255, 255, 0).) Check out the LED Animation library. I'm fairly certain it works on RPi, but I haven't tested it. Also, fairly sure it supports RGBW, but I don't recall for sure.

pure hill
#

Hey everyone! My raspberry pi (3B+) doesn't seem to detect i2c with the bno055 IMU. I just connected the pi with my arduino and tried turning a led on over i2c and it worked perfectly. The wiring should be good so I'm a little surprised that it doesn't detect the i2c. When I used my Arduino, I set it at 0x8 and when I ran i2cdetect -y 1, it returned something at 0x8. Right now, this is all I get when I run i2cdetect. Does anyone know what could be going on?

old parcel
lost wolf
old parcel
#

mhmhm, btw really nice website, love how you guys make easy but not to distracting gifs of the projects

trim umbra
#

just gonna ask again because my question got burried, is there a python animation library for the neopixels or do i need to hardcode them myself?

lost wolf
trim umbra
#

thanks

#

ill look into the circuit python one

lost wolf
trim umbra
#

thankyou

pure hill
#

Hey! Does anyone know how I could test whether my bno055 IMU is broken? I tested whether the voltage and ground are connected correctly by letting it light a LED so that should be okay

trim umbra
#

given your in the raspberry pi section have you enabled spi on the pi?

#

@pure hill

pure hill
#

yup, you mean i2c right?

trim umbra
#

yeah

#

just wanted to make sure, thats about all i could think of xD

pure hill
#

Yeah haha. I'm not sure what to do at this point... I must say, I'm not the greatest solderer and I was using a really bad soldering iron so is it possible that I damaged the IMU like irreversibly?

trim umbra
#

any direct contact with the pcb at high temps for a long period of time has a chance of damaging the onboard components

#

but normally isnt too bad

pure hill
#

Well this sucks haha. I'm still in high school at the moment and I'm doing like a special project my school started. I have an "instructor" that gives me these things I have to do and reading an IMU is one of them, I really wanted to get it done asap but if it's damaged it'll take me another couple of days

ruby night
# pure hill Well this sucks haha. I'm still in high school at the moment and I'm doing like ...

Can you post a picture of the soldering? Also, have you ever used the I2C on this Raspberry Pi just o be sure it is OK -- Third, have you tried running the "simpletest " on the bno055 even though the I2C scan does not report it. There have been issues with the scan in the past. The bno055 is can be difficult on a pi. Have you been following htis guide ? https://learn.adafruit.com/adafruit-bno055-absolute-orientation-sensor/python-circuitpython

pure hill
# ruby night Can you post a picture of the soldering? Also, have you ever used the I2C on thi...

I used i2c to communicate with an arduino earlier today so it should work perfectly fine. When I connected the arduino, running i2cdetect -y 1 also returned the i2c address of the arduino if you know what I mean. I haven't tried running simpletest but I'll test it out now! I've used multiple guides, this one being the latest: https://cdn-learn.adafruit.com/downloads/pdf/adafruit-bno055-absolute-orientation-sensor.pdf but I'll try out the simpletest and your guide now!

#

I'll send a picture of the soldering in a moment

ruby night
#

Have you installed "blinka" on your Pi?

pure hill
#

yes

#

I know the soldering kinda sucks but I had a really crappy soldering iron okay haha

ruby night
#

The scan you posted shows I2C devices at 0x60 and 0x70 -- what are those?

pure hill
pure hill
ruby night
pure hill
#

thanks for helping me btw, means a lot

#

oh yeah

#

Are both the shield or can it only be one?

ruby night
#

The soldering could be a problem . If you have access to the soldering iron again, you could try reheating the connections to get the solder to flow better. It does not look like you need to add any solder except maybe to the RST pin. The VIN looks particularly suspect.

ruby night
pure hill
#

Alright, apparently we got a new one and I used the old one. So I'll try resoldering tomorrow and just quickly try out the simpletest and tutorial you sent me

ruby night
#

Good luck!

pure hill
#

Thanks! :)

mystic wharf
humble marsh
mystic wharf
#

hmm fair. I had used it this way for a different project and I guess it worked not bad. Since I want to use some of the circuitpython libraries, this seems is the easiest way. Thanks!

#

that being said, I feel like the tutorial I followed is maybe obsolete at this point? or maybe it needs to specify older versions of adafruit_platformdetect?

tired marsh
#

platformdetect should be fixed to try/catch on import typing, you can try removing the imports

steady rose
pure hill
pure hill
#

thanks for the help everyone!

mystic spindle
robust tangle
#

Hi can you tell me what version of circuitpython in need to download to use on a RPi 3b+ plz? there i cant find 3b+ in the list
Many thanks

tired marsh
robust tangle
#

Thanks

pure hill
ruby night
old parcel
#

i was wondering which pip install added this library and how

because there's a bug fix that i would like to in the production (not community) of adafruit's libraries

steady rose
#

any updates to rpi_ws81x need to be released first, by that library

#

and then you could update blinka to pull in latest

#

you'll have to wait for that PR to be merged and released

#

and that's entirely up to the maintainers of the rpi_ws281x repo

midnight stone
#

could i connect a raspberry pi zero 2 w safely to a 6V power source

#

i read that it operates between 4.75v and 5v

rough forge
#

i have a pca9685 servo shield and a raspberry pi 2b to drive 9 servos.
when i move the servos in software, the servos move, but not at the same time. the move one after another.

this is my code: ```python

from future import division
import time
import Adafruit_PCA9685

pwm = Adafruit_PCA9685.PCA9685()

def set_servo_pulse(channel, pulse):
pulse_length = 1000000 # 1,000,000 us per second
pulse_length //= 60 # 60 Hz
print('{0}us per period'.format(pulse_length))
pulse_length //= 4096 # 12 bits of resolution
print('{0}us per bit'.format(pulse_length))
pulse *= 1000
pulse //= pulse_length
pwm.set_pwm(channel, 0, pulse)

pwm.set_pwm_freq(60)

print('Moving servo on channel 0, press Ctrl-C to quit...')

while True:
pwm.set_pwm(0, 0, 90)
pwm.set_pwm(1, 0, 90)
pwm.set_pwm(2, 0, 90)
pwm.set_pwm(3, 0, 90)
pwm.set_pwm(4, 0, 90)
pwm.set_pwm(5, 0, 90)
pwm.set_pwm(6, 0, 90)
pwm.set_pwm(7, 0, 90)
time.sleep(1)
pwm.set_pwm(0, 0, 635)
pwm.set_pwm(1, 0, 635)
pwm.set_pwm(2, 0, 635)
pwm.set_pwm(3, 0, 635)
pwm.set_pwm(4, 0, 635)
pwm.set_pwm(5, 0, 635)
pwm.set_pwm(6, 0, 635)
pwm.set_pwm(7, 0, 635)
time.sleep(1)```

is there something wrong with my code or can the shield do only one servo at a time?

umbral sable
#

There is a set_all_pwm() call to do them all at once, but I'd ordinarily expect that the sequential calls would be fast enough to not notice with human senses. How much of a time lag are you seeing?

rough forge
#

from first servo moving to last servo moving about 2 seconds id say

#

i can send a video if you want

umbral sable
#

That's very unexpected. You've got a 2-second loop in total in the code. Does the back-and-forth go slower than that?

rough forge
#

nope

#

i modified the code so it runs with dmx values, and it is still delayed

# 
import sacn
import Adafruit_PCA9685
print("Import completed")


receiver = sacn.sACNreceiver()
receiver.start() 
pwm = Adafruit_PCA9685.PCA9685()

def set_servo_pulse(channel, pulse):
    pulse_length = 1000000    # 1,000,000 us per second
    pulse_length //= 60       # 60 Hz
    print('{0}us per period'.format(pulse_length))
    pulse_length //= 4096     # 12 bits of resolution
    print('{0}us per bit'.format(pulse_length))
    pulse *= 1000
    pulse //= pulse_length
    pwm.set_pwm(channel, 0, pulse)
    pwm.set_pwm_freq(60)
    
print("Started")

# define a callback function
@receiver.listen_on('universe', universe=1)  
def callback(packet):
    for i in range(9):
        pwm.set_pwm(i, 0, int(90 + ((packet.dmxData[i]*100/255)/100) * (635-90)))
        print((packet.dmxData[i]))```
umbral sable
#

Any chance your I2C setup is accidentally using a ridiculously low frequency, like 100 Hz instead of 100kHz?

rough forge
#

where can i check that?

umbral sable
#

It looks like you're just using the default I2C initializer, so that's probably not it. But I am confused. You might some quick timing tests like:```import time

start = time.time()
for i in range(9):
...
print(time.time() - start)```

rough forge
#

it returns:
0.0001125335693359375

umbral sable
#

That's what I'd expect, less than a millisecond to go through the loop. So the servos should be getting their signals quickly. Not sure why there would be a delay.

#

The only thing that pops to mind is that your power supply might be browning out when too many servos are moving at once, so the later ones can't draw enough power to start moving until the first ones stop, or something like that. If you have a multimeter you might check the power rail voltage while this is going on.

rough forge
#

oh 1 sec i have no power supply connected rn

#

but i tested it with power supply so it should work

#

i mean not work but not be different

umbral sable
#

I'm not following. What's powering the servos right now?

rough forge
#

only the raspberry

umbral sable
#

That's probably not going to be sufficient for 9 running at once. Motors really ought to have their own power.

rough forge
#

i tested it previously only on a esp8266 and external power supply. that didnt worked

#

raspberry and power supply works

#

thanks for your help

#

and sorry for my stupidity not to connect a power supply

#

no wait
it is still not completely synced.
its just a lot better but there is still about half a second of delay between the movement

old parcel
#

Or does a fork of that repo need to@make a new release? Then I can contact the maintainers to get that going and all 🙂

iron kestrel
#

hello guys, I'm a student working on a project with raspberry pi for my bachelor's degree, and currently I am stuck trying to figure out if there is any way to get a 5v relay working? I saw only around two results on the web that used NPN transistors and resistors to convert from 3v3 to 5v, and I have those only the schemes were not matching (the electrical diagram and fritzing diagram), so I'm not trustworthy. Can you offer me any help?

old parcel
iron kestrel
#

and according to the research I have made, it seems like the relay is rated for 5V, so this means he sees output low even when sending 3V signal, I don't know if I explained very good, not my native language

olive haven
iron kestrel
old parcel
iron kestrel
#

thanks

#

but since you guys are here, one more question for tonight

#

i can't get the machine library

#

installed micropython and everything (I read it is included in micropython)

#

for the DHT11

olive haven
iron kestrel
#

with that version I get only the errror, and I do the wiring good

olive haven
#

what error?

iron kestrel
#

Sensor failure. Check wiring.

#

it never reads

#

according tot the debugger

#

always skips the if

olive haven
iron kestrel
#

yes, followed the instructions from adafruit

#

yesterday i tried both

#

i tried with adafruit library and also pigpio

#

is there any way the sensor is faulty being brand new?

olive haven
#

It's always possible. I don't know that particular part

#

so I don't really know how you would troubleshoot it.

iron kestrel
#

i understand, thanks for the effort

#

have a nice night

ruby night
#

But be forewarned, the DHT sensors can be frustrating on a Pi.

hardy plaza
# iron kestrel hello guys, I'm a student working on a project with raspberry pi for my bachelor...

It's not clear from your description if the solution is part of your project or you simply need a controllable relay. If the latter, here's an option: https://shop.pimoroni.com/products/ht0740-breakout?variant=29453796606035

HT0740 40V / 10A Switch Breakout

Oh boy, this is a Big. Damn. Switch. Program it to switch loads up to 40V / 10A connected to the HT0740 breakout's sturdy screw terminals, and use up to four breakouts at the same time using the configurable I2C addresses. Great for home automation.

#

These are I2C/CPython-controlled fully-isolated electronic (not mechanical) switches. Work like a charm, I've used them for several years.

lofty charm
#

Hello, I have been trouble shooting how to figure how to get both my device with i2c communication to work. I figured out the issue is that they both share the same i2c 0x68 address and came to the conclusion that I need a i2c multiplexer https://www.adafruit.com/product/2717?gclid=CjwKCAiAvOeQBhBkEiwAxutUVM4tzCFfjHtHW_LdC7iPCs3fzR0OYYpFb3VDYw2gyad_ME89HEZ6BRoCArkQAvD_BwE. I have this raspberry pi ups hat https://www.pishop.us/product/raspberry-pi-ups-hat/ and this Adafruit accelerometer https://www.adafruit.com/product/4464. My question If I would to get the i2c multiplexer. I have my UPS HAT connected straight into the Raspberry Pi GPIO pins or does the UPS HAT need to be on a bread to connect to the i2c multiplexer with the accelerometer as well? Also is there alternative UPS HAT that work with my accelerometer so I don't need the i2c multiplexer?

TCA9548A I2C Multiplexer

You just found the perfect I2C sensor, and you want to wire up two or three or more of them to your Arduino when you realize "Uh oh, this chip has a fixed I2C address, and from what I ...

PiShop.us
Raspberry Pi UPS HAT

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.

umbral sable
normal vale
#

Might anyone know why EGL is able to GetDisplay, but unable to Initialize with the returned(valid) display handle?

#

Am I supposed to set max_framebuffers to 2?

lofty charm
half nexus
#

What is raspberry pi zero 1.3, and what's the difference with original zero, and zero W(wifi) (I know, the zero 2 is out)

ruby night
half nexus
#

Error 1020 is still present on their shop website

ruby night
#

I don't get an error...

half nexus
#

it's ironic that it doesn't blocks the vpn

#

works fine now

#

I'm looking for a rpi-like computer that easy to ssh into, because it's sometimes awkward to ask a friend for an ethernet cable

ruby night
#

With WiFi? the Zero 2W (or zero w) work well for me -- or the 3B+/ 4B if you want something more powerful.

half nexus
#

I would like to have more common standards like usb or... usb

#

I don't know whether electronically micro usb ports capable of data transfer or not, but I'm sure type C on newer ones does

#

Although I know one compromise

productsraspberry-pi-zero-usb-stemraspberry-pi-zero-usb-stem-hardware.png
#

zerostem comes fully disassembled, so I probably can solder micro usb or usb B

productsraspberry-pi-zero-usb-stemraspberry-pi-zero-usb-stem.png
half nexus
#

I can probably make one for the normal sized pi

olive haven
#

The Zero 1.3 works with a wireless dongle through an OTG USB adapter. I was able to use the Imager to create a wifi- and ssh-enabled image and was able to ssh over wifi as soon as it finished booting.

#

I believe the Zeros are the only Pis that can work as USB Device, just Host. A Zero can be Host or Device. (The USB port is set up to be Device, which is why you need the OTG adapter to make it a host for wifi-dongle & other USB devices.)

rough forge
#

i have 2 adafruit pca9685 servo shields, i know how to controll one with a raspberry pi. But i dont know how to tell it there is another.

this is the code to move channel 0 on the first shield:```py
from future import division
import time
import Adafruit_PCA9685

pwm = Adafruit_PCA9685.PCA9685()

def set_servo_pulse(channel, pulse):
pulse_length = 1000000 # 1,000,000 us per second
pulse_length //= 60 # 60 Hz
print('{0}us per period'.format(pulse_length))
pulse_length //= 4096 # 12 bits of resolution
print('{0}us per bit'.format(pulse_length))
pulse *= 1000
pulse //= pulse_length
pwm.set_pwm(channel, 0, pulse)

pwm.set_pwm_freq(60)

print('Moving servo on channel 0, press Ctrl-C to quit...')

while True:
pwm.set_all_pwm(0, 0, 90)
time.sleep(1)
pwm.set_all_pwm(0, 0, 635)
time.sleep(1)


i have bridged the last of the 8 adress pins on board 2, so it should have a different adress than the first one

thanks in advance
umbral sable
rough forge
#

thank you

olive haven
lucid nebula
#

My Raspberry Pi Zero W does nothing when connected to power, and I have a micro sd card in

zealous seal
lucid nebula
#

Not really

zealous seal
#

I would try to reflash it with the default image

#

If you see the LED blinking green i think it means its reading the SD card

lucid nebula
#

I'm not seeing any lights on the Pi

west sierra
lucid nebula
#

Micro USB to wall plug

west sierra
#

have you tried a different plug?

lucid nebula
#

I believe so. I remember getting a second plug

west sierra
#

or a different power supply I should say

lucid nebula
#

I remember getting a second one

west sierra
#

did you try that one since you got it, though?

lucid nebula
#

I'm pretty sure that's the one plugged in now

west sierra
#

have you tried with the old one

#

or, does that same power supply work with other things other than the Pi?

lucid nebula
#

I don't remember where I put the old one

west sierra
#

Alright. So you can power a Pi Zero W off of a computer as well, it only needs 1 A as far as I know.

#

also, throwback to hall of fame support staff questions: "Is your power on?"

lucid nebula
#

Yes, power is on, lol

west sierra
#

😄

#

and you said you do not have a second SD card?

lucid nebula
lucid nebula
west sierra
#

unplug something else for a moment... priorities 😄 ¯_(ツ)_/¯

lucid nebula
#

I did a rewiring job on where my Pi was plugged into, and still nothing

west sierra
#

Have you plugged anything into the Pi while it was powered? If so, what?

#

And, to what pins did you plug said thing into?

lucid nebula
#

Not really. The power was plugged in last. HDMI was first to the correct port, and the USB input was plugged into its correct spot

west sierra
#

you remember touching anything to the pin headers on the Pi? or have you connected anything to the pin headers?

#

Basically... were you being a dingus and now you're looking for a way to save your Pi? 😄

#

(because I have also killed a Pi before)

lucid nebula
#

No, only thing I have done was put the Zero into a case

west sierra
#

dang

#

OK, so I think you need to test with a different SD card.

#

Adafruit sells some cheap ones. As do Amazon.

lucid nebula
#

Too bad I have $0 right now

west sierra
#

OK, so, if you plug that SD card into your computer (I hope you have an adapter), can you read the card?

lucid nebula
#

I do have a built-in one, yes

#

I'll check in a bit here

west sierra
#

k

#

yeah, other than that... maybe your dog/cat/hamster/ferret/housegnome chewed on your Pi when you weren't looking...

lucid nebula
#

Idk how they got back there, considering you have to be flat as a board to get to the cables

west sierra
#

or, if you've had any power outages, or power surges.... it might have been affected depending on where it was plugged in

lucid nebula
#

Maybe

#

I don't remember if I had it plugged in before the power strip

west sierra
#

normally you reset the Pi by formatting the card and reinstalling Raspberry Pi OS on it

lucid nebula
#

K

lucid nebula
#

@west sierra "The directory name is invalid"

lucid nebula
#

And now the SD card is reading 121MB, and not 32...

zealous seal
lucid nebula
#

So, just format it again?

zealous seal
#

Use the Rpi disk imager app - it'll take care of the formatting for you

lucid nebula
#

Can't format through the imager unless the drive is 5 GB or more

zealous seal
#

Hrmmm, I've never had that issue - what OS are you on?

lucid nebula
#

Formatting on Windows

zealous seal
#

It might be worth formatting it with windows first then - usually you can select the entire device. Where did you order the SD card from initially? It might be worth verifying its not counterfeit

lucid nebula
#

It was a promo from Micro Center

zealous seal
#

Hrmmm, that should be good then

lucid nebula
#

I can't get it formatted through the default Windows formatter. Anyone have any third-party recommendations?

olive haven
#

I used the Imager (v 1.7.1) just a little while ago to put a Lite image on a 4GB card.

#

There's also an option in the Choose OS control to choose Erase (Format card as FAT32). That shouldn't be necessary, but you could try it before imaging the OS.

lucid nebula
#

Ah, thanks

#

Reeeee

Capture26.PNG
#

@olive haven Idk what to do. It's a RAW format type

olive haven
#

This is from the Erase option?

lucid nebula
#

Yes

olive haven
#

If so, I think it means you've got a bad SD. You'll just have to get another

lucid nebula
#

This is the second Micro Center brand product that has failed on me

olive haven
#

I've had good luck with SanDisk and with Samsung

lucid nebula
#

Yeah, I have a SanDisk in my Switch

deep pawn
#

sorry i am not sure which channel is most appropriate to post. i have a rudimentary python script that sends an email (to sms gateway thingy so it's a "text message"). stumbled thru that okay but i am having trouble with it sending the text without a new line at the end. what should i be googling to learn how to fix that? i've tried to use .rstrip() at the end but to no avail

#

#import smtplib
import smtplib, ssl
from email.message import EmailMessage

msg = EmailMessage()
smtp_server = 'smtp.gmail.com'
gmail_user = 'xxxx@gmail.com'
gmail_password = 'xxxxx'
port = 465

to = 'xxxxxx'

#msg['Subject'] = 'Current Temp'
msg['From'] = gmail_user
msg['To'] = to
#msg['Content-Type'] = 'text/plain'
txt = f'Current Temp: {temperature:.1f}F'
msg.set_content(txt)

context = ssl.create_default_context()
with smtplib.SMTP_SSL(smtp_server, port, context=context) as server:
server.login(gmail_user, gmail_password)
server.send_message(msg)
server.quit()

umbral sable
rotund pivot
#

it could be that Google is inserting one (or the library)

deep pawn
#

now to make this script a little more complex with some logical operators to send the text only if the temp is outside of a certain range, and make sure it doesn't go berserk when it's right on the cusp of one of the limits.

olive haven
#

Welcome to the Python club!

deep pawn
#

wish i started learning this stuff ages ago. theres so much you can do!

olive haven
#

(well, these days it's print("hello, world!"))

deep pawn
#

LOL i blindly imported several libraries today just for the heck of it 😆

normal vale
lucid nebula
#

Yeah, probably not going to do that again

normal vale
#

I've found that as long as you don't abruptly interrupt the Pi (pull out the power cord before shutting down, power outage, ect...) then they seem to work nicely, but you can't really control some of those scenarios

normal vale
#

Is it possible to have my program "detect" when auto-login occurs? I have a graphical application (custom splash screen) that runs early in the boot proccess with systemd, before auto-login. I want the program to be able to detect when the pi user is logged in, so it can display a different GUI

fickle shard
rocky flare
#

Are all MIPI interfaces created equal? Been looking at one of them oblong displays. Kinda cool. Found one for £32 and says it uses a MIPI interface. So wondering if will work with a RPi. WTL078401G04-24M

turbid rivet
#

There are a few products designed to be drop-in replacements for the RPi display, such as this out-of-stock SeeedStudio original: https://www.seeedstudio.com/5-Inch-800-480-DSI-Interface-LCD-Capacitive-TouchScreen-p-4559.html
However, the vast majority of MIPI displays tend to be ripped from mobile phones or other small touchscreen devices with their own wiring and various pair count, so it does take some research to verify the feasibility of a MIPI display from AliExpress...

5-Inch 800x480 DSI Interface LCD Capacitive Touchscreen (Raspberry ...

This is a 5-Inch LCD capacitive touchscreen with multi-touch support and has a resolution of 800x480. The panel is TN, which means, it has a very low power consumption with short response time and a high refresh rate. Also, only a single DSI interface is required for both power supply and data transmission. It is very easy to set up this LCD wit...

rocky flare
#

Thanks for the feedback. I did find that there is a difference in the data pair counts. RPi has one. I had hoped that like PCIe that a higher data lane display would 'fallback' to less data lanes. Not seen if that is the case, so may not be. I have a reTerminal from seeed. That uses a phone display. It's display is fixed in portrait so rotation has to be done in software. I can't find the datasheet for the display I was looking at. So a bit of a gamble. I can config the kernel easily. Just need the datasheet. :/

half nexus
olive haven
elfin vigil
#

Can someone tell me/help me with python and making one LED turn on then when a push button is pressed it toggles the first LED on and the second LED off?

hardy plaza
# elfin vigil Can someone tell me/help me with python and making one LED turn on then when a p...

I'm not going to be able to step you through but I can suggest you first consider what kind of computer board you're using, and then which version of Python (CPython as on a Raspberry Pi), MicroPython or CircuitPython, and that will lead you to the hardware-connecting software library that provides the ability to do things like read a pin (for your pushbutton) and drive your LEDs.

CPython, MicroPython and CircuitPython all do this differently, and sometimes differently again depending on the underlying hardware, though you're generally insulated from that for the most part for simple things like reading digital IO pins.

As an example, in MicroPython you'd be using the Pin class and/or the machine library (the latter if you wanted to use interrupts), see:
https://docs.micropython.org/en/latest/library/pyb.Pin.html
https://docs.micropython.org/en/latest/library/machine.html?highlight=machine#interrupt-related-functions

#

CircuitPython will have its own way, searching for examples online of how to read a pin or set a pin as an output will find you plenty of hits.

#

On the Raspberry Pi there are actually a number of different CPython libraries (e.g., RPi.GPIO, gpiozero, pigpio) that perform these same tasks, some have advantages over others.

half nexus
#

Help

mystic veldt
#

Looking for some advice on how to configure an rPi 400 to play an audio wav file from a python and headless.

System:
rpi 400
USB Sound Card
aplay and arecord works from commandline

pi@raspberrypi:~/SoundLevel/audio $ aplay bleep.wav
Playing WAVE 'bleep.wav' : Unsigned 8 bit, Rate 11025 Hz, Mono (yay sound)

play -l
card 1: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0

lsusb
Bus 001 Device 005: ID 8086:0808 Intel Corp. USB PnP Sound Device

I am trying to get:
pygame_audio.py

import pygame
pygame.init()
my_sound = pygame.mixer.Sound('/home/pi/test.wav')
my_sound.play()

Working on a rPi 400
When I run it from the command line:
sudo python pygame_audio.py

I get errors:
"pygame.error: No available audio device" (playing wav file directly from py)
or
aplay: main:830: audio open error: No such device (calling .sh script)

olive haven
#

I hooked up a RPF 7" Touchscreen (https://www.adafruit.com/product/2718) and had quite a time getting it working. (I deleted a bunch of posts giving a blow-by-blow account.) What finally worked for me and my 3B+ were these changes in /boot/config.txt:

#

Anyway, it's working fine for me now, and is a really sweet little display. (I'll get past today's sour experience by and by.)

mint leaf
#

I have a raspberry pi 4B controlling a 12V fan via PWM. However, I am ending up with a strange phenomenon:
The fan will run at the proper speed for a minute or so, then drop in speed by about 20% for 12-30 seconds (times really rough estimates, I haven’t timed them specifically), before speeding back up to proper speed. Does anyone have any ideas how to fix this?
Does a 12v fan require a 12v PWM? Do I need to find a way to convert my signal to 12V?
In case it isn’t too obvious, I am a noob.

#

I should note I am using pins 13 and 19 to control the fans.

hardy plaza
# mint leaf I have a raspberry pi 4B controlling a 12V fan via PWM. However, I am ending up ...

A 12 volt fan running at 5 volts will clearly run at less than half speed, regardless of PWM (and yes, normally one would use PWM to control speed rather than voltage). You don't mention how you're powering your fan but motors take a lot of current, and likewise you don't mention what kind of power supply you're using (same as the Pi?). A Pi 4 requires a lot of current, and it really needs a 5.1v supply of sufficient current capacity. There's also a lot of electrical noise generated by a motor, and you should be isolating that from your Pi. But frankly you've not provided enough information to even guess more than that what the problem actually is.

If you're a noob I'd probably recommend not using a 12 volt fan unless that's a requirement of your project, as there are 5 volt fans available. If this is a 12 volt fan for a reason (like: a specific fan) and controlling that fan is actually your project, then you should investigate 12 volt motor controllers that can be controlled via a Raspberry Pi. There are lots of them out there. I do robotics and we of course use motor controllers all the time. Pololu is a great source for motor controllers that aren't too expensive. You can get C/C++ and Python libraries to support the controller and your task then is usually just to send the controller a number (e.g., 0.0 to 1.0 or 0 to 255, etc.) and the motor will respond accordingly.

mint leaf
#

Sorry, based on your reply I realized I left out a lot of information.
The 12V fans are connected to their own 12V power supply. The Raspberry Pi is on its own normal power supply. Obviously, a ground wire from the 12V supply is connected to a ground terminal on the Raspberry Pi. I have testing the setup in multiple ways on multiple fans… different fans, different wires, different power supplies. I have tried different PWM frequencies, and am currently operating at 25kHz. I have also tested multiple Pi’s, so in theory it should be possible for anyone to replicate. The fans are simple PC 120mm 12V fans.

mystic veldt
#

I have a Pi 400. Can a Python Script access a USB Soundcard(5Hv2)
from a cron Job?

hardy plaza
mint leaf
hardy plaza
# mint leaf Pin 13 on my raspberry pi connects directly into the PWM pin on the fan (which i...

I don't believe this is a software issue. I'm just trying to tease out the actual problem here and try to help you frame it so either you or somebody else can answer it. Until now I had assumed the fan was a two wire (power) connection, but now you say there's a PWM pin on the fan itself. It would have been helpful to know this at the beginning as there's a huge difference in a two wire motor driven by some kind of power controller and a fan that has a PWM pin. We (as people trying to help you) would now need to know what the requirements are on the PWM pin (can it be driven by a 3.3 volt login output pin?), the schematic of your wiring, etc.

turbid rivet
#

@mint leaf Is there a manufacturer or a part number for this fan that we can reference? Even a "simple" PC fan will differ from manufacturer to manufacturer.

mint leaf
mint leaf
hardy plaza
#

But I gotta run for now... ciao

mint leaf
# hardy plaza Is it possible that the behaviour you're witnessing is actually some kind of pro...

I don’t believe this is fan related… not specifically, anyway. As in, I don’t believe it is a defective fan, or a certain type of fan causing this. As I stated, I have tried multiple different styles and types of fans, (all four-pin fans), and experienced the same results. I have two main theories… 1) the PWM single isn’t the proper voltage. I don’t know enough to tell if the Raspberry Pi is sending 3.3V or 5V, and my main question is if that should, in theory work, or if it should be 5V instead of 3.3V, or 12V instead of either. 2) the PWM single itself isn’t constant from the Raspberry Pi… as in, for some reason, the PWM decreases for some coding (or hardware) reasons. My reason for this theory is because at lower frequencies, (I currently operate at 25kHz, but have done testing all the way down to 100Hz), and the lower the frequency, the more distinct the drop in fan speed. The higher the frequency (and I’m not sure the max of the raspberry pi, I typed in 100kHz), the more un-noticeable it becomes.

hardy plaza
#

Just for clarification, the supply voltage of a Raspberry Pi is 5.1 volts, but all of its logic (e.g., GPIO) is 3.3 volts.

#

If these fans are designed for use on a desktop computer you need to find out if the PWM signals they are expected are meant to be 12 volt PWM signals. If that's the case and you're sending 3.3 volt PWM that clearly won't be a high enough peak to peak voltage to trigger.

mint leaf
hardy plaza
#

That's the 5 volt power input pin, not an output.

#

That pin bypasses the fuse that is found on the USB connector so it's best to use a USB power source unless you're sending a safe voltage.

mint leaf
#

Yup, my power supply is through the USB C port.

#

However, I have a touch screen powered by the 5V pin… or at least, I thought that is how it worked.

hardy plaza
#

You'll need to look at the specifications of your fan to find out if it's expecting a 12 volt PWM signal.

hardy plaza
mint leaf
hardy plaza
#

I personally have no idea (and would still contact the manufacturer or find out what PWM signal is expected) but it seems that some 12 volt fans expect a 5 volt PWM signal. That may be common for all PC fans, but I don't know.

mint leaf
hardy plaza
#

Sure, that'd be nice. On looking at this now, if it's a 5 volt PWM signal that would make more sense than a 12 volt PWM as a 3.3 volt signal from the Pi wouldn't be enough to trigger the high side of the filter. But with 3.3 volts being close to 5 volts, you may be seeing the effect of parts of the PWM waveform having a partial effect as a factor of frequency. PWM signals are meant (usually) to be square waves but in reality they're not perfectly, so it may be that (as a function of frequency) the PWM signal is affecting the motor speed but imperfectly. Have fun!

#

...and if you share your working schematic here, other people can benefit from what you've learned.

mint leaf
olive haven
frozen kraken
#

What up party people! I found an old raspberry pi zero W that I had set up for headless mode, and have changed The Wi-Fi network since. How could I reconnect to this thing?

steady rose
#

you can remove the SD card, put in a PC, and add new wifi settings in /boot

frozen kraken
frozen kraken
#

Me again: I'm trying to print something via thermal printer, and the string I'm printing prints an additional "J" in front of the string I'm printing. e.g:

#

import serial import adafruit_thermal_printer import datetime uart = serial.Serial("/dev/serial0", baudrate=19200, timeout=3000) ThermalPrinter = adafruit_thermal_printer.get_printer_class(2.16) printer = ThermalPrinter(uart) printer.print("Child's Name:")

#

And that code will print out like this:

#

"JChild's Name:"

#

Anybody know why that additional character is printing?

steady rose
#

it looks like it was notionally fixed

frozen kraken
#

Awesome, thanks so much!

frozen kraken
steady rose
#

that change has already been done and should be in the latest release

#

it may be similar, but something else

frozen kraken
#

Interesting - gotcha. And if I just pip3'ed that library today in a vanilla raspi 0, where would I find the pip files? (If someone knows off the top of their head only - not trying to put the work on anybody else)

#

ie where would I find that Adafruit_Thermal.cpp file?

#

nvm - I just ran a find, and I don't think I have it.. Thanks so much for all the help!

steady rose
#

oh...wait...sry. i was looking at arduino lib. you're using the python lib.

frozen kraken
#

lol, I was like "well, they might ... idk, build python files from .cpp source files.... MIT and all that...."

#

The cognitive dissonance is real!

steady rose
#

does the firmware version get printed when you do a self test?

frozen kraken
#

Ah, gotcha! Yes! The firmware's version is: GV2.16.08 20191121_R

#

(Sorry for the late response - I got really chuffed when I got it to print my daughter's daily school COVID checklist via crontab!)

#

Fixed it!

#

The issue was I had the firmware version as 2.16, not 2.168

#

Big thanks, @steady rose !

steady rose
#

cool. glad that fixed it.

#

that's a pretty awkward interface for specifying firmware version 😦

frozen kraken
#

Yeah, I just took a guess, originally - didn't know the patch version needed to be concatenated.

#

Random question for you: what projects are you planning to start that you're excited about?

steady rose
#

the logic is not super fancy

frozen kraken
#

lol, I'm loving that logic!

hard dome
#

Huh apparently the Pi Cobbler Plus bridges all ground traces instead of being a 1:1 mapping for the 40pin connector

#

There's probably some reason ala good board design, but it makes it hard to use as a general purpose 40pin IDC to breadboard connector

storm lake
#

hi there I was hoping I could get a second pair of eyes on some PiJuice documentatation to help me clarify some things.

It's the section regarding the P3 header on the PiJuice Zero.

P3 is an expansion header which provides access to two unused GPIO pins on the ARM Cortex M0 (STM32-F0) MCU on board the PiJuice. There is also a regulated 3V3 and 5V0 pin, a GND pin and a VSYS pin which has the same function as VSYS on J3. VSYS output is programmable via with software with "OFF", "ON 500mA current limit" and "ON 2100mA current limit". The voltage for VSYS is in principle the battery voltage (nominal 3.7V, varies between 3V and 4.2V depending on charge level) The 5V pin is wired with the GPIO header and is then share amongst the Raspberry Pi's electronics and the PiJuice for battery charging.

https://github.com/PiSupply/PiJuice/tree/master/Hardware#connectors

Does this mean I can I use the P3 pins (specifically the 5v and GND pins) to provide power to the Zero4u USB Hub through the JST connector on the Zero4u?

you can use the JST XH2.54 connector on board as the alternative power input port.

https://www.adafruit.com/product/3298

Thanks in advance

obtuse merlin
#

Hey guys! I fell in love with the old macintosh style UI and im now making a slim RPI. At first i wanted to use the minimal linux image but is there a way i can code my own app launcher? Like just a simple screen with icons that i can click that start a app

hardy plaza
#

If you're not aware there is a fully functional Macintosh emulator. I've used it quite extensively, even developed some new HyperCard stacks with it. It's called Mini vMac and you can find it at: https://www.gryphel.com/c/minivmac/

#

...and yes, you can run it on a Raspberry Pi.

obtuse merlin
#

I am aware but thats not what i only want to run on the machine. Id like to run like maybe 3-4 apps, including mini vmac. But i dont need a full DE for this. What Im thinking is, that the pi boots into a App launcher (Just a screen with icons that i can click). But id like to design this app launcher. Any Ideas?

hardy plaza
#

Sorry, I think you're ahead of me on this one...

#

If you're going to require X windows the easiest thing is the DE

#

but of course you can run X windows from a script (that's how it starts), so you could launch that from your app launcher, assuming you aren't planning it to itself be a windowed application.

obtuse merlin
#

@hardy plaza Im just planning on running them in fullscreen, without a window manager.

hard dome
#

not all apps know how to open full screen, so you might want to use a window manager like compiz or metacity, then use xdotool to fullscreen the app

mint leaf
hardy plaza
# mint leaf So, stepping the 3.3V signal to 5V did not solve the problem. I am really disapp...

Sorry to hear that didn't work out. There is no "standard" PWM from a Raspberry Pi, you just control the output from a pin according to your software, and it will output 3.3 volt logic (peak to peak) at the frequency you generate, with the pulse width likewise according to your software. So if your software library says 25kHz, 50% duty cycle, that'll be the output. It will be relatively accurate as the Pi has an accurate hardware system timer (actually, four of them).

Are you sure your logic level converter is working correctly? Do you have an oscilloscope to actually test it? If not you're kinda flying blind, i.e., guessing as to what is actually going wrong. It's very hard to diagnose problems like this without the tools necessary. We're both just guessing otherwise.

mint leaf
mint leaf
hardy plaza
#

You can possibly borrow or rent one as well. It's a relatively expensive investment, but if you're planning to do this kind of work could be worth it. There's both standalone oscilloscopes as well as USB units that plug into a laptop. I went old-school and bought a 1970s era Iwatsu (Japanese) four channel oscilloscope, the ones with the green screens that hum when they're on.

#

Most oscilloscopes will do basic stuff nowadays pretty well, so the biggest questions are maxiumum frequency and how many channels. I use four channels for robotics but two is usually fine for a lot of things.

#

I don't have a recommendation on a brand but you get what you pay for, as in any tool.

#

But if you ask that question in an appropriate forum you'll get lots of opinions I'm sure.

#

I was looking and I can't think what would be an appropriate forum. I run the Personal Robotics server and we have a bunch of hardware geeks, but here should be a bunch of them here as well and this is a huge community. Maybe in #general-tech

#

It looks like Adafruit sells a variety of oscilloscopes if you search on their website.

#

I'd imagine any that they sell are effectively endorsed by the company so should be pretty reliable.

#

If you don't want a physical unit you can buy a logic analyser or oscilloscope that is just a multi-channel sensor that plugs into a laptop or desktop computer. Digilent sell them but there are many brands, and I have no experience to help you choose, sorry.

#

I know that Digilent is a good solid brand and I've heard of Siglent, Hantek and others but can't advocate for them as I don't have any personal experience. There's a ton of Chinese ones that are pretty cheap and might work fine, dunno. I don't think you'd go wrong with Digilent, but their stuff is of course more expensive.

mint leaf
thorny pike
#

Does anyone know of a python module or other language library that will work with the Zigbee standard? I've found lots of stuff for controlling other switches/bulbs etc but I'm looking for the opposite; something that will report as a standard Zigbee RGB bulb so that it can be controlled with a third party hub.

Ideally it'd receive signals e.g. "turn light off" or "set brightness to 0" or "set colour to x" and allow me to then do whatever (I will be controlling a custom LED matrix I've built).

heady cedar
#

I'm still very new to interpreting the messages that scroll through when the Raspberry Pi installs software. When going through a Blinka install on a new Bullseye install, I received this error half-way through, but it seems this was the only error to show in red & the rest of the install looked like it worked - the Pi offered to reboot. Any reason to worry about this? Thanks!

E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?```
heady cedar
#

Did a reboot & reinstall & the error didn't show up the second time. Any info on this is always useful since I'm still trying to learn. Thanks!

faint sparrow
#

it's just going to fail to completely install.

#

there's an audit you can do to correct stragglers

# 
 $ sudo apt-get check
#

that's probably the one I'm thinking of.

turbid rivet
#

Any fan recommendations for a Pi 3B? It's being mounted in an electronics enclosure, so no need for a case. I would prefer a reliable fan that's not super noisy, but these days everything has mixed reviews...

hardy plaza
#

Yes, there's a Pi buried somewhere in the rat's nest, the fan just blows sideways over the board.

#

My biggest issue with a lot of the fan HATs is that my GPIO pins are generally already stacked to the heavens with them, so there's never room for Yet Another HAT, and blowing sideways always makes more sense when there is a stack of boards (creating an enclosure) anyway. But if you have no other HATs a HAT based fan may be easier to mount, though you mention you have an enclosure, so putting the fan on the enclosure itself vents the case.

turbid rivet
#

I've yet to figure out how to mount anything to the enclosure without drilling holes, so mounting to the Pi directly would've been my first thought. I do have access to 24V in the enclosure, so I was considering a 4-channel mosfet module and a 4-pack of those cheap 3d-printer blower fans wherever I figure I can mount one. However, those fans don't seem to be much more reliable compared to the 5V counterparts...

hardy plaza
turbid rivet
#

I do know Noctuas are pretty solid fans from my one-and-a-half PC builds, but 12V is an awkward voltage I'd rather avoid if possible...

hardy plaza
#

The little 30mm ones I'm using are 5v fans, quiet, and enough for a Raspberry Pi. And cost something like $3.

turbid rivet
#

I did 3D print a mounting bracket that screws to the aluminum extrusion, so I might pursue a custom bracket for the fans as well.

hardy plaza
#

Ah, so you're cooling more than just the Pi. What you want to do is make sure the heat generated can get out of the enclosure, otherwise you're just blowing warm air around inside (which helps, but not so much as getting rid of it). I'm not a fan of hot glue, but if you're trying to avoid screws that could work.

turbid rivet
#

Well, the other parts already have their own cooling, so it would be only for whatever components I would add myself. The Pi, plus a mosfet module and a 24V/5V converter of sorts.

#

I do have hot glue, and I guess I could "borrow" some thermal epoxy from work if needed...

hardy plaza
#

I'd say concentrate on exhausting the case rather than the Pi or components themselves then. Regular epoxy would be fine unless you expect your temperatures to get that hot (which seems unlikely) but of course thermal epoxy would be good too.

turbid rivet
#

If I had access to machining tools, I might've considered opening up the bottom panel some more, but ehhh

lost stirrup
#

hi! does anyone have any idea how to count cycle in pioasm for rp2040? I want to have a clock frequency at 5 MHz, so it will be really helpful to know how many cycle in this:

​​c .program pio595 .side_set 2 .wrap_target pull block side 0 set x, 7 side 0 loop: out pins, 1 side 0 nop side 0x1 nop side 0 jmp x-- loop side 0 nop side 0x2 nop side 0 .wrap ​​

native token
last bramble
#

whats the tiniest model of raspberry pi to exist

#

i wanna try building a hidden pi machine inside a trident gum packet

#

as a 'first project'

wraith grove
#

pi zero methinks?

#

might not get as small as you want there, even a pi microcontroller may have a hard time fitting that.

last bramble
half nexus
#

afaik orange pi zero is the smallest one, but vertically you have to unsolder the ports

last bramble
#

Will this work on a zero w?

IMG_20220309_163652.jpg
#

Or do I have to get specific displays for the zero w

hardy plaza
hardy plaza
half nexus
#

and also, some 3,5" displays only source power from gpio and require external hdmi dongle

hardy plaza
#

Well, it doesn't even run the Raspberry Pi OS, so it's kinda in a different category entirely (as this is the Help with Raspberry Pi channel). If duck is interested in displays that are GPIO compatible then the Orange Pi won't work. As to displays, there are different types of course. Most of the smaller ones that attach to the GPIO pins are SPI devices, most that are separate units that use HDMI will of course use HDMI connectors at both ends, which makes the overall unit very large. If it's going to fit into a gum packet it'll have to be an SPI display like one of the tiny Adafruit PiTFT displays, e.g., https://www.adafruit.com/product/4393

Adafruit Mini PiTFT - 135x240 Color TFT Add-on for Raspberry Pi

If you're looking for the most compact li'l color display for a Raspberry Pi (most likely a Pi Zero) project, this might be just the thing you need!The Adafruit Mini PiTFT - ...

half nexus
#

I thought he would use it as some small linux machine, not potentially portable device that's greatly dependent on pi accessories compatibility

hardy plaza
#

There's not a lot of hardware accessories for the Orange Pi boards.

half nexus
#

Display wasn't in context until I sent my message

hardy plaza
#

Ah

#

There's probably no display that can fit thickness-wise in a gum packet though the tiniest PiTFT (the link I provided) could be wired side-by-side with the Pi Zero, but I think that'd use up the enclosure entirely. If the display were on top then it'd require the GPIO pins as well as clearance of the CPU, etc. and the thickness is now around 16-18mm. Probably not feasible unless the display were to ride above the gum packet. It's kinda at the limit of possibility, might be worth a try. Not an expensive experiment and if it doesn't fit one could find a next-size enclosure. That little display is great especially combined with a Pi Zero.

amber fulcrum
#

i know this is a channel for Pi's and not the pico specifically, but i've seen some 1.3" displays for the pico like this one, if it's any help?

1-3-oled-display-module-for-raspberry-pi-pico-64x128-waveshare-wav-19376-28584776007875_60x.png
half nexus
#

I've had this idea laying around for quite a while

unknown.png
#

Ooops, forgot it to upscale