#help-with-linux-sbcs

1 messages · Page 12 of 1

tired marsh
#

oh I feel like I would check the server's config for what ip it listens to and accepts from, but other than that I don't know, I'm not aware of anything that could block it otherwise, sorry

midnight stone
#

that's all i've got on the server properties stuff

unknown.png
opaque wagon
#

on a different computer, try going to the inet address (192.168.1.133) in a browser

midnight stone
#

thats what i do

#

but it doesnt work

opaque wagon
#

could you post your code between backticks like this:
```python

code here

```
becomes:

# code here
#

if it's large do a pastebin/gist and link here

midnight stone
# 
from http.server import BaseHTTPRequestHandler, HTTPServer

hostName = "127.0.0.1"
serverPort = 8080

class MyServer(BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        print(self.path)
        #if self.path == "openGate"

if __name__ == "__main__":
    webServer = HTTPServer((hostName, serverPort), MyServer)
    print("Server started")
    try:
        webServer.serve_forever()
    except KeyboardInterrupt:
        pass
    webServer.server_close()
    print("Server stopped")```
opaque wagon
#

maybe change the hostName to 0.0.0.0?

midnight stone
#

i had it at 0.0.0.0

opaque wagon
#

127.0.0.1 tells it to only serve on localhost

midnight stone
#

changed it to 127.0.0.1 to test just now

#

wait

#

now it owrks

#

somehow

opaque wagon
#

what did you change?

midnight stone
#

changed it from 127.0.0.1 to 0.0.0.0

opaque wagon
#

ah good it works on other computer now?

midnight stone
#

yeah

opaque wagon
#

nice! if you have any other problems just ask here again - this community is very nice

midnight stone
#

alright

wise sonnet
#

So I’m using a Pi ZeroW to generate a control signal for a brushless motor and ESC. Doing it in circuitpython with pwmio. With the raspberry, the pwm signal is very jittery around its set value. I tried with a microcontroller and it’s rock solid - so I don’t think it’s anything downstream of the control signal. I oscilloscoped the pwm signal and I can see duty cycle jumps around a bit directly when it’s being generated by the Pi.

Does this just come down to Pi’s not being ideal for real time applications? That’s why the microcontroller works fine? Or is it something else? I want to control over WiFi and while that’s possible on Microcontroller of course, it’s trivial on a Pi (and that’s what I have on hand) - that’s why I’d like to use that if I can.

#

I guess a more succinct question is: is a raspberry pi equally good at generating a pwm signal as a microcontroller? Not sure what goes on under the hood myself to know.

opaque wagon
wise sonnet
#

@opaque wagon , thanks! I had a feeling it might be something like that - guess I’ll stick with a feather

hybrid vortex
opaque wagon
#

IMHO, it would be easier to buy like an Adafruit AirLift Featherwing for the Feather as there are very nice APIs and you don't need to wait for a Pi to boot, worry about file system corruptions, etc.

wise sonnet
#

@opaque wagon @hybrid vortex the Raspberry Pi 5 with an on-board RP2040 will be a nice upgrade 😛

hybrid vortex
#

It definitely would

#

I feel there is a good chance for it happening as the rp2040 was designed around having very flexible and powerful io

wise sonnet
#

for sure

wraith grove
#

rapsberry pi pico, pin 15, do not use, has a special purpose
I feel awkward yakking about a microcontroller here, but there I go

what is the special purpose of pin 15 that must not be said in the first few google search results I tried?

#

several demo projects seem to use that to blink a LED, so I'm not gathering it is as bad of a line of thought as "why should I waste two buckets when I can fit my matter and antimatter in one?"

finite bay
#

Who says it has a special purpose?

wraith grove
#

"You get a total of 25 GPIO pins (technically there are 26 but IO #15 has a special purpose and should not be used by projects)" -- Adafruit product 4864

#

their pinout card also says "DO NOT USE ->"

#

more digging,
"GP15 should not be used, it is used by the internal USB peripheral" -- ladyada

finite bay
#

Interesting, since the official datasheet / docs don't mention anything about this.

wraith grove
hybrid vortex
#

It’s a bug with how it interacts with USB I think

#

Something like that or the startup process if I remember correctly

wraith grove
finite bay
#

Well, there you go 😄

wraith grove
#

still pondering why the earth is not covered in anitmatter explosion marks, lots of examples use that pin

finite bay
#

It's always fun when a chip has a bug but existing applications depend on this bug, and so it will either never get fixed, or when it gets fixed everything breaks 😉

midnight stone
#

weird for some reason only 2 out of 4 pins that i have easy access to wont drive the relay

#

using a raspberry pi zero W

#

and by wont drive i mean

#

the relay wont open after being closed

#

or other way around idk the technical terms

#

the TxD and RxD named pins work fine

midnight stone
#

ill jsu switch to different pins

balmy niche
#

does anyone know if it is possible to use a raspberry pi zero as a usb audio device?

fresh trench
wise sonnet
#

Here’s the issue to maybe explain better than my text

#

You can see how jittery the duty cycle is

fresh trench
#

which os

wise sonnet
#

Raspbian Lite

fresh trench
#

I think given the default scheduler in all of those distros is for general purpose, they will never give us the level of control on the rise/fall edges we want in software. its always going to preempt for things we dont care eabout. Id wager the real time kernal is not up to par with the mainline tree on these devices yet, but using a RTK with a single use focuse scheduler might help.

#

custom built gentoo, in other words, with zero fluff

wise sonnet
#

Thanks! I have a feather laying around too so I think I’ll just use that though

#

This is the first time I ever bumped into this as a practical issue. I’d heard people say “watch out” for these cases before

fresh trench
#

welcome to the jungle, we got fun and games 🙂

mint leaf
#

I need a lot of specific help with raspberry pi integration with Adafruit’s RGBW NeoPixel strips. I’ve made a lot of progress, but I am stuck on the flickering issue. Who can I talk to for help?

umbral sable
#

Pretty much everyone here is just an enthusiast or a volunteer, so you'd want to just explain what you've done and what problems you're seeing. Trying to reduce it to the simplest case that still causes the issue is often useful.

hybrid vortex
#

Often when I use neopixels I will use a microcontroller to drive them as they handle the timing requirements much better which might help with the issue

wraith grove
#

way above my pay grade, but suddenly wondering how hard it'd be to tell linux to leave a core alone to run its own bitbanging daemon

#

actually, you can largely tell it to leave a core alone and that a program can stick to one core, not sure how much that would help, but, thats a thing

hybrid vortex
#

I feel it would be much easier to add a low cost microcontroller to deal with it as modifying the linux kernel to do that sounds difficult

#

You will need to make lots of changes to the scheduler to make it closer to how rtos works

wraith grove
#

if it is the only program on the core, I'm wondering of the scheduler will get in the way all that much

#

set it to "not very nice at all" and tell everything else to attempt no landings there :-)

mint leaf
#

So, I have a microchip running animations for the lights, but I still want to set colors from a raspberry pi. Single output and done is all I’m looking for... solid colors. Someone in another thread online mentioned blacklisting the audio kernel module as a fix... but I can’t find any information as to how to do this.

mint leaf
#

Okay, I think I figured out the blacklisting and it didn’t work. Here is my next question... I have a raspberry pi 4, and I will be running the lights off an Arduino Leonardo. Is there a way to se my color value for solid colors to the Arduino?

mint leaf
#

Never mind, I think I found a solution. In frustration, I just grabbed a bunch on grounding wires and grounded and double grounded things... and then it worked. Some days, I just don’t understand electronics...

strong topaz
#

(Cross-posted from help-with-audio): I have some ICS41350 MEMS PDM mics and would interface to RPi 3B. I know the Broadcom chip has built-in PDM support -- does that include built-in decimation and LPF? Or do I need to implement that in software?

waxen valve
wise sonnet
waxen valve
#

you must use the pwm peripheral

#

and an example of:

import pigpio
import time

pi = pigpio.pi()

pi.hardware_PWM(18, 38000, 300000)
wise sonnet
strong topaz
#

Hmm. To re-cast my question: has anyone interfaced PDM mics to an RPi 3? I've already got I2C working, but need to switch to PDM...

solemn finch
#

ladyada said on ask an engineer tonight that an I2S mic is the way to go with RPi

strong topaz
#

Yes, but...the I2S mic is frequency limited. The PDM mics are the only way to go if you want to listen to bats and other ultrasonic sounds...

#

I've seen one recipe for tweaking the RPi kernel to switch from I2S to PDM, but wanted some consensus on how to do it.

faint sparrow
#

Hi guys, I just saw a video about the CrowPI - A Raspberry Pi built into a small hardcase along with a range of peripherals to interact with.
As a linux and python nub this looks like an awesome way to learn - Not too expensive either, but I wonder, are you aware of a somehow better product out there?

molten glen
#

wasting a lot of time if i keep having to unplug it, reboot and enter sudo bash setup.sh config.json [-s 1234] to resume the installation.

#

temperatures are fine it doesnt go past 25c but CPU usage is way up at 100 constantly causing my VNC client to disconnect

#

im going to have SD card issues again if i keep powering it off by yanking the cable out

umbral sable
#

Maybe use nice to run the installation at a lower priority, or use a simple ssh terminal instead of VNC?

molten glen
#

ssh freezes as well

#

think its because i have it idling for too long

#

thats why i used VNC instead

umbral sable
#

That's unexpected. Something in the install script might actually be crashing the Pi.

molten glen
umbral sable
#

Or maybe purposefully rebooting it?

molten glen
#

done that 20 times

umbral sable
#

I'm a little suspicious of the 25C temperature reading, as that seems pretty low even for normal idle consumption.

#

Maybe consider underclocking the processor temporarily?

molten glen
#

now that im ssh'd in what can i do when it freezes

unknown.png
#

rebooted and used nice in 10 before the install script command hopefully that helps

#

connection was reset see this is what i mean

#

ssh keeps disconnecting and now i cant get back in it says timed out!

#

pinging it doesnt go through, plugging in hdmi and keyboard and its still unresponsive.

#

increased my swap on size to 4GB gonna see if that helps, after this i will underclock.

umbral sable
#

My best guess at this point is that the temperature sensor is not working correctly, so the processor is continuing to run flat-out and eventually overheats and crashes, instead of knowing to throttle itself back. So hopefully underclocking would help it keep cooler. Obviously if you have a fan or heatsink, that might also help.

#

Maybe see if there's a build option to run on only one core instead of multithreading the compile?

molten glen
#

ITS WORKING!

#

increasing the swapon size helped!

#

it was a memory issue according to github

molten glen
worthy locust
#

Hi, I'm using the DC and Stepper Motor bonnet for the raspberry pi and trying to control a 5V DC motor using it. However, when I run my code, I find that the motor just sits there and makes a high pitched noise rather than actually turning. I've tried using other motors as well, ending up with the same result. Any suggestions as to why this is happening and how I can fix it? I've found similar questions online but they're mostly related to Arduino and controlling PWM. Any help would be much appreciated 🙂

#

I measured the voltage across the terminals of M1 using a multimeter and it seems to be around 6V. I also tried connecting an LED instead of a motor, and that worked just fine. So why doesn't the motor work properly? 😦

hybrid vortex
#

@worthy locust try using stepper1 instead of motor1 and motor2

#

And stepper2 instead of motor3 and motor4

#

And onestep instead of throttle

#

If you want to move more than 1 step you will want to put it in a loop

worthy locust
#

Sure, I'll try it out, thanks!

hybrid vortex
nova karma
#

I have a raspberry pi case (this: https://www.adafruit.com/product/4341) where the foam was damaged in disassembly. I'd like to reuse. The gap between the raised parts and the pi is too large for heat sink tape, and I'm considering using some PC CPU cooler thermal compound. Terrible idea?

tawdry lynx
#

Hi! I am getting this error after trying to run the example inside Adafruit PN532;

File "readmifare.py", line 44, in <module>

pn532 = PN532.PN532(cs=CS, sclk=SCLK, mosi=MOSI, miso=MISO)

File "build/bdist.linux-armv7l/egg/Adafruit_PN532/PN532.py", line 166, in init

File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/GPIO.py", line 420, in get_platform_gpio

ImportError: No module named Adafruit_BBIO.GPIO

#

I would be very much appreciated if anyone helps 🙂 (I am not sure if i asked the question on the correct channel, warn me if its wrong.)

marsh monolith
#

Hi I have a pi4 and i have a Qwiic HAT and I have the BNO085 IMU sensor i attached to the HAT with JST 4 pin cable. I would like to know how i can detect if sensor is responding ? I am a total N00b.

umbral sable
marsh monolith
#

Thank you. I will try that

hearty path
hearty path
tawdry lynx
hearty path
#

That's quite peculiar 😕 And that was on this same device?

tawdry lynx
#

Yes exactly.

#

This is what i have been trying to use.

hearty path
#

Ok. I don't have that sensor, but I'm trying to reproduce the issue you're seeing up to that point

nova karma
tawdry lynx
hearty path
#

You might want to try uninstalling the BBIO library with pip uninstall Adafruit-BBIO and add "adafruit-blinka" with pip install Adafruit-Blinka

tawdry lynx
#

I already have Adafruit-Blinka but i will try uninstalling and installing those asap.

#

Btw, i just noticed that my rpi has python 3 in it. Is there way that there is a mismatch cause this library seems quite old?

hearty path
# nova karma hard to measure. 1 mm?

Worth a try. Seems a bit big of a gap to bridge, but at the same time, the PI doesn't run so hot that it will spontaneously vaporize itself if it gets too hot

hearty path
tawdry lynx
hearty path
#

Were you able to get past that error?

tawdry lynx
#

My rpi is not in my hand at the moment 😦 and it is 03:26 AM here atm lol. Will try these in the morning and give a feedback for sure 🙂

hearty path
#

Yikes! Fair points. Good luck, and good night!

#

If you still run into issues, someone's around 🙂

tawdry lynx
#

It is great to hear that sir! Thank you so much again and have a good night, or a day, or whatever it is :=) Will ask more questions for sure 😄

runic kettle
#

is there a proper tutorial link for raspberry pi4

stoic finch
#

Cursed images incoming:

#

Assuming I match up the GPIO pinouts, would the above work as a sort of GPIO passthrough? I want to use the Braincraft Hat on a Pi4 but want access to additional GPIO pins and am reluctant to solder on to the board.

ruby night
#

If you are planning to attach a ribbon cable to the black 2x20 header, make sure you have the "key" on the correct side. It looks to me like it is reversed in your picture -- Pin 1 of the header should be 3.3V - the "key slot" should be on the 3.3V side.

ruby night
#

another simpler solution is to use one of these https://www.adafruit.com/product/2223 - I have used it with other hats (I have not actually tried it with a Braincraft) The long pins should pass through the Braincraft header and allow access from the top of the board.

GPIO Stacking Header for Pi A+/B+/Pi 2/Pi 3

Connect your own PCB to a Raspberry Pi B+ and stack on top with this normal-height female header with extra long pins.  The female header part is about 8.5mm tall, good for small HATs ...

runic kettle
#

guys please help me, i need to control my LED connected to GPIO pins on my Raspberry pi 4 by google assistant, searched some on google nothing seems to work fine

runic kettle
#

my script says connected and turns on the relay , but i cant turn off or on through adfruit

unknown.png
tawdry lynx
#

I have managed to create some small projects using PN532 NFC Module with a Raspberry pi 4 to read and write to MiFare cards but i need to do it on android smartphones. Yet, i couldn't find any examples or documentation related to NFC read/write to smartphones. Can anybody help?

mystic thistle
#

I am soooo confused! I have been googling for the best way to connect pi units via bluetooth. They all have built-in hardware and I am using the Raspbian buster lite. I have read that the lite version has an issue directly out-of-the-box with using bluetoothctl. I had to add pi to bluetooth.
Then I see that using the hci0 and hciconfig is another way.

#

Then I see the bluetooth wrapper on git.
This has confused me as to what is the best way to ensure that bluetooth is running after boot on each pi.
I want to script one of the devices to be a 'server' and the others as 'clients'. So that the server can send, redirect, and receive messages.

#

What is the best way to script bluetooth?

final solstice
#

TLDR; will CircuitPython still work with Blinka on my Pi 4 if I’m running on Ubuntu rather than Raspian?

Hello, I am trying to plan out my next robotics project. I’m hoping to build it on the ROS2 framework.

ROS2 requires Ubuntu and doesn’t fully support Raspian. Will CircuitPython with Blinka work on the Pi4 with Ubuntu? Are there any considerations?

faint sparrow
#

@final solstice Just try it.

#

Ubuntu is Debian, pretty much.

final solstice
# faint sparrow <@!441385031106166794> Just try it.

Thanks. I’m in the architecture planning stage for my next robot project and I’ve never used an RP nor ROS and I’m a noob with Linux, so I’m trying to get past as many of the “is this wrong or a terrible idea” before I start tinkering.

For example, I’m watching a James Bruton video and I see he uses an arduino to control his components and then that talks to the RP over UART

faint sparrow
#

I was pleasantly surprised to find that 99 percent of my Debian (AMD64) skills work in Raspbian.

#

For all intents and purposes (save a few; there's always a gotcha I suppose) Raspbian and Debian are about the same.

#

Ubuntu is mostly Debian. Anything good the Ubuntu team comes up with probably makes it into a later Debian release.

modest dune
#

@final solstice When you run Blinka on a Raspberry Pi, either under Ubuntu, or Rasbian, you are running full Python 3.7 or latest, not CircuitPython. Blinka is a library interface that allows all the Circuitpython device drivers to run under full Python. In general, it works fine.

#

When you run Ubuntu, you may have to adjust some of the I/O permissions to permit the I/O access.

mystic thistle
#

What is the correct way to script bluetooth for RPI0, RPI3, RPI4 with embedded BT?

solemn finch
#

We use bleak to do BLE from python. (You can use CircuitPython's BLE libraries via Blinka BLE)

mystic thistle
#

@solemn finch thanks. I am in information overload. Just need a single direction to go.

solemn finch
#

what are you trying to do over bluetooth?

mystic thistle
#

I am trying to configure 2 RPI0, a RPI3 and RPI4 to communicate remote procedure calls and offloading compute from the RPI0s to the 3 and 4.

#

AI is the more important of it all, but hardware status and display is the other.

#

I have a RPI0 that will act as a battery manager. This provides a UI on a 1.13" tft display also will respond to command to shutdown the other RPIs when the operator request it.

solemn finch
#

I'd recommend using ethernet or wifi to do that. BLE has low data rates

mystic thistle
#

@solemn finch I think I will look into WIFI for Pi-to-Pi communications. Thanks

molten glen
#

does it matter how i position the MCP3008 chip? the side with the dot is facing the cobber.

steady rose
#

the dot indicates where pin 1 is on the MCP3008

#

so just need to use that to make sure the correct pins get connected

molten glen
#

i dont have enough space on my breadboard to put the fsr there

2015-01-07-rasp-pi-fsr-breadboard.png
#

the green dots near each component, are those unavailable for the FSR to be placed there?

steady rose
#

green dots in that fritzing diagram?

molten glen
#

yes

#

on another diagram they have placed this wire 3 down, does that matter?

unknown.png
#

can the wire be placed anywhere near 3v3 as long as its on the line?

molten glen
# molten glen

my setup looks like this but the breadboard doesnt extend pass the mcp3008

steady rose
#

fritz is using those green dots to indicate breadboard "rows" that are used

molten glen
#

oh okay

steady rose
#

the idea being that once something is connected to a given location, everything on the breadboard connected to that location shows the green dot

#

just so you know something is connected

#

in terms of how breadboards are arranged - see above guide

#

i think knowing that will help understand what fritz is doing

#

that red wire - it could have gone in any of the 4 locations

molten glen
steady rose
molten glen
#

can i put another component behind that red cable if i have the space? or will that interfere

steady rose
#

all those breadboard holes in the red rectangle are connected

#

not sure what you mean by "behind"

molten glen
#

so i couldnt put my FSR in any of the green holes here aww man

unknown.png
#

ill send pic of my setup

steady rose
#

in general, correct

#

you could do something like this maybe

unknown.png
#

but would want to move the resistor leg also

molten glen
#

where can i put the FSR?

IMG_0607.JPG
molten glen
#

already bent 2 lol

steady rose
#

ooof. no room 😦

#

need either a full size breadboard or a second breadboard

molten glen
#

gonna order another breadboard now

steady rose
#

^^ i have a couple of pi's setup with that to use for testing

molten glen
#

UK so i cant get superfast adafruit delivery :(

#

have to use amazon or pimoroni

steady rose
#

you might be able to get the FSR in on that setup

molten glen
#

think i will because its huge

#

the two adafruit links are out of stock too

steady rose
molten glen
#

FSR wont reach those two holes

#

is there anything else i should get for future projects?

steady rose
#

what do you have in the way of jumper wires?

molten glen
#

dont have any jumper wires just ordinary breadboard wires

#

ordering the big breadboard now that should also let me position the FSR like the person in this guide has

#

placing it sideways is stronger, the way i was placing the FSR you could yoink it out easily.

steady rose
#

probably same thing "breadboard wires" = "jumper wires" = "hookup wires"

#

various names

#

but worth having a nice stash of dedicated wires of various lengths and colors

molten glen
#

i ordered this electronics kit that comes with a bunch in various sizes

steady rose
#

yep. those.

#

cobbler...full sized breadboard...jumper wires...

#

that should be good to get you started at least

molten glen
#

got it

faint sparrow
#

Why can i not use commands on my pi zero, Ive connected over SSH using usb OTG

unknown.png
#

am i doing somthing wrong

#

omg nvm im dumb there was no files in that directory

hearty path
#

D'oh! It's always the simple explanations!

faint sparrow
#

yea i got it, Ive never used ssh before, its just that the pi put me into the home/pi directory by default and i thought no commands were working

#

i thought ls wasnt working

hearty path
#

Gotcha. SSH is nice - it's like a command line version of remote desktop. Except secure, and been around for much longer

floral fjord
#

I installed a Pi inside of my 3D Printer without remembering that a metal case = bad WiFi haha

I bought myself a compatible USB dongle with a big antenna, I'm hoping the larger antenna helps with the metal case but if not, the antenna is removable so I can always panel mount it with an adapater so the antenna is outside

Is there a way to tell the Pi to use the WiFi Dongle instead of the onboard through SSH?

I'm unsure which one it's going to be using without me specifying

#

I got it

#

$ echo "dtoverlay=pi3-disable-wifi" | sudo tee -a /boot/config.txt

#

Didn't know you could do it like that

#

Hmm, maybe not as simple as I thought, any idea what I'm doing wrong?

hearty path
#

Are you trying to add the content dtoverlay=pi3-disable-wifi to the /boot/config.txt file?

floral fjord
#

Just following this

#

Not that Pi knowledgeable

hearty path
#

What you can try is doing an output redirect, instead of using tee. Something like this...

sudo echo dtoverlay=pi3-disable-wifi >> /boot/config.txt, which will append dtoverlay=pi3-disable-wifi at the end of the file

echo hare
#

hi everyone, i need to run it with raspberry pi with ph sensor. I could not find the required library. Can anyone help with the DFRobot ph sensor

faint sparrow
#

~~Hey all, I am trying to get data using a barcode scanner and a python script, but when I run it, all it does it write the barcode, it doesnt seem to read it from the /dev/hidraw0... I am using this to get the data: https://bin.charles-bot.com/iwudawexoy.py~~

faint sparrow
faint sparrow
#

nvm got this to work, only issue I'm having now is its printing the barcode twice... because it writes it as keyboard and from the print(), so is there any way I can disable the keyboard input?

novel mist
#

Hey alll,
I need some help.
I am connecting to the raspberry via xrdp, so remote desktop.
If I want to run a Thonny as an admin from the command line, it is not running, I just got an error...

#

is there a solution for that?

novel bay
#

Has any one used minty boost with the Pi Zero W

#

I can't seem to find the best way to power a Pi Zero W in a way that I can carry it around, yet it doesn't add a lot of weight to it.

Wanted to even add a e-ink or TFT display if required, but yet again unable to understand the voltage / amp requirements and suitable power supply for the same, when not connected to a wall socket

fast tapir
molten glen
#

SPI is enabled in raspi-config and here is my code

import time
import busio
import digitalio
import board
import adafruit_mcp3xxx.mcp3008 as MCP
from adafruit_mcp3xxx.analog_in import AnalogIn

# create the spi bus
spi = busio.SPI(clock=board.SCK, MISO=board.MISO, MOSI=board.MOSI)

# create the cs (chip select)
cs = digitalio.DigitalInOut(board.D22)

# create the mcp object
mcp = MCP.MCP3008(spi, cs)

# create an analog input channel on pin 0
chan0 = AnalogIn(mcp, MCP.P0)

print('Raw ADC Value: ', chan0.value)
print('ADC Voltage: ' + str(chan0.voltage) + 'V')

while True:
    # hang out and do nothing for a half second
    print(chan0.value)
    time.sleep(0.5)```
steady rose
#

can you post photo of actual setup?

molten glen
#

oh just realized i could be looking at the wrong channel on the chip!

#

nope, the channel is correct its 0.

#

ill send a pic now

balmy bronze
#

@molten glen [you were briefly muted due to sending multiple messages in a short period of time, you may need to repeat something you said]

molten glen
#

thanks

#

took a few incase the angle was bad 😄

steady rose
#

one thing right off - your breadboard has split power rails, just something to be aware of

molten glen
#

ohno

molten glen
steady rose
#

don't think so for your current setup

#

see how the red/blue lines don't run the full length of the breadboard? there's a gap mid way?

molten glen
#

yes

#

so i can only use that side of the board?

steady rose
#

the lines indicate what's connected

#

you can use them however

#

just realize that they don't run the full length of the breadboard

molten glen
#

yeah

steady rose
#

only half way

#

that trips a lot of people up, as full length is more typical

#

doesn't look like you are on the SPI pins

novel bay
faint sparrow
#

Does anyone know the total height of a raspberry Pi 3/4 with a 2.4 piTFT hat

mystic arch
#

hey guys do anyone have idea how to connect 3.5 inch lcd to rpi and a motor and a led

mystic arch
molten glen
mystic arch
#

do i need to download the software or it's web version is available

molten glen
#

dont know i havent used it

molten glen
#

From the imagine it looks like I need to connect the MCP3008 CS to GPIO 6

#

Think I've resolved it now, code says cs = digitalio.DigitalInOut(board.D22) and D22 is GPIO 25 so the MCP3008 CS pin goes there :)

molten glen
#

Stuck again, wired everything except the FSR now trying to find out how to do that.

#

ITS WORKING!!!

steady rose
#

@molten glen cool. looks like you figured it out. that pinout.xyz site is a great reference, i use it all the time. the cobbler and libraries use the BCM numbering.

molten glen
# 
    if chan0.value >= 0:
        print(chan0.value)```
steady rose
#

make the conditional > instead of >=

molten glen
#

tried already

#

it outputs zeros and speeds up when i touch the FSR

steady rose
# 
value = chan0.value
if value > 0:
    print(value)
molten glen
#

chan0.value is an int ive tested it

steady rose
#

try like that also, store the reading in a variable

#

otherwise you are reading twice

#

each call to chan0.value takes a new reading

molten glen
#

tried already no output

#

think thats the first solution i tried

steady rose
#

so the value in the conditional may not be the same as in the print

molten glen
#

typerror? nah

steady rose
#

no, not type error

#

just code

molten glen
#

now it fills console with 54720 🤔

unknown.png
steady rose
#

move the reading inside the loop

#

weight = chan0.value

molten glen
#

just print(weight) inside the while spams zeros

steady rose
# 
while True:
    weight = chan0.value
    if weight > 0:
        print(weight)
molten glen
#

that works!

#

thank you :)

steady rose
#

do you understand why it wasn't working before?

molten glen
#

print(weight) inside of the while loop only had an output of zero so ik that it couldnt reach weight = chan0.value

steady rose
#

i think you're seeing that assignment as sort of a mapping, or linking?

#

and you're expecting to be able to use weight elsewhere in code and have it provide chan0.value ?'

molten glen
#

yes

#

i will turn this while loop into a function instead and call that when i need to get the weight

#

going to leave it running for a few mins and see what the highest value that comes up without anything touching the FSR then compare that to weight.

#

trying to weigh small items like tablets/ pills with it

#

oh no its not as stable as i thought it would be

#

getting a max reading of 512 without any pressure on the FSR 😟

steady rose
#

the syntax may be a bit confusing, but this chan0.value is the actual "call" to get a new value, in something like arduino, that'd look more like chan0.value()

molten glen
#

ohh

steady rose
#

weight = chan0.value simply assigns the returned value from the "call" to chan0.value into the variable weight

#

but unless you do that again, weight just keeps the same value

#

don't expect "no pressure on FSR" to equate to a reading of 0

#

you'll need to calibrate raw ADC readings to FSR pressure somehow

#

and then do the math

molten glen
#

what is ADC?

steady rose
#

analog to digital converter

#

analog = real world values, like voltages, things that vary continuously

#

digital = 1's and 0's in computer land

molten glen
#

oh i can get voltages!

#

print('ADC Voltage: ' + str(chan0.voltage) + 'V')

#

"Returns the voltage from the ADC pin as a floating point value. Due to the 10-bit accuracy of the chip, returned values range from 0 to (reference_voltage * 65472 / 65535)"

steady rose
#

^^ yep

molten glen
#

idc about getting the value, the voltage reading would be better in this case.

fierce spire
#

How can I eliminate the jittering when I control a Servo with Rasperry Pi PWM?

steady rose
#

is it jittering at a fixed output?

fierce spire
#

No I try to rotate it with the eulerangle data from the bno055 sensor so if sensor is oriented -5 degrees I calculate 90 + -5 for the angle the servo should rotate

bright meteor
#

Hello, I'm having some trouble finding the IP address of my raspberry pi so I can SSH into it. I've installed the finder, but it wasn't working since it couldn't find the network.

#

been tryna solve this issue since a week

#

also the raspberry pi is connected through a wire which connects to my mac (through wifi)

#

@ me with answer, please

fast tapir
# bright meteor Hello, I'm having some trouble finding the IP address of my raspberry pi so I ca...

There's lots of things that can be wrong, and the networks configurations have changed a little bit over the past few years. If you're sure the network settings are correct, I'd check the syslog to see what IP address the pi thinks it has. This is what a typical reservation looks like:
Apr 15 13:10:13 debian dhclient[30411]: DHCPREQUEST of 192.168.0.181 on wlp2s0 to 255.255.255.255 port 67 Apr 15 13:10:13 debian dhclient[30411]: DHCPACK of 192.168.0.181 from 192.168.0.1 Apr 15 13:10:13 debian NetworkManager[557]: <info> [1618506613.4716] dhcp4 (wlp2s0): address 192.168.0.181 Apr 15 13:10:13 debian NetworkManager[557]: <info> [1618506613.4716] dhcp4 (wlp2s0): plen 24 (255.255.255.0) Apr 15 13:10:13 debian NetworkManager[557]: <info> [1618506613.4716] dhcp4 (wlp2s0): gateway 192.168.0.1

steady rose
#

@fierce spire sry, walked away. so you're feeding BNO sensor data straight into servo angle in a loop?

fast tapir
#

There will also be reports about things that go wrong in there. Syslog is at /var/log/syslog

#

Can you log into your pi over serial, or is there a UI? If you don't have anything, you can shut it down and check the syslog on the sd card

steady rose
#

^^ yep. that. can you get into the Pi some other way than network?

bright meteor
#

sorry, I'm a beginner

steady rose
#

system log

#

it logs various system level messages. some of those may contain useful information about what is happening with network setup.

bright meteor
#

okay

#

oh

#

I've already tried that

#

and I did those

#

but my code in the .conf file is different

fast tapir
#

How are you interacting with your pi?

bright meteor
bright meteor
#

and plugged the pi into my mac

#

that's it

bright meteor
fast tapir
#

Do you have a serial cable, or any other way of logging into the pi?

#

It's OK if you don't

bright meteor
#

I don't

#

but I think I can

#

not sure idk

fast tapir
#

OK; are you editing the network config file by plugging the sd card into your computer?

bright meteor
#

I put in the sd card, edit it, take it out, put it in pi

steady rose
#

yah, try it per the guide. i think this

    scan_ssid=1

line helps.

bright meteor
#

ok, let me try that

#

and after that, I will use the finder

steady rose
#

or just try pinging it from the mac

molten glen
#

After connecting the Adafruit Voice Bonnet board with a GPIO header and plugging in the ribbon cable, im no longer able to get an output from the FSR.

Entire_setup.JPG
steady rose
# 
ping -n 3 raspberrypi.local
bright meteor
#

ok I edited the file

#

oh

#

so you want me to type that now?

#

in terminal

steady rose
#

after you reboot and wait a bit

#

do that in terminal on mac side

bright meteor
#

how do i reboot?

steady rose
#

cycle power

bright meteor
#

🤔

steady rose
#

should be removing the SD card with power removed

bright meteor
#

kk

#

let's hope it works

steady rose
bright meteor
#

what does that mean

molten glen
#

I used a stacking header

steady rose
#

oh. ping is diffy on mac...hmmm....

#

use -c instead of -n

molten glen
#

its not visible in the img because of the angle

bright meteor
#

oh no

#

okay so

#

I removed the card from the pi and put it into my mac

#

to check the files

#

but now I don't see the ssh or the .conf

#

they're not there anymore

#

is that normal?

steady rose
#

yep. they go away after booting.

bright meteor
#

alrighty

#

lemme try this: ping -c 3 raspberrypi.local

#

ping: cannot resolve raspberrypi.local: Unknown host

fast tapir
#

Can we try letting it run for a minute or two, then looking at the system log?

steady rose
#

@molten glen go back to just the ribbon cable and make sure you can read the FSR again, i.e. repeat your previous success

bright meteor
#

let me wait for a minute

#

how do I look at the system log?

fast tapir
#

When you plug the sd card back into the mac, navigate to /var/log/syslog

#

then open it with a text editor

molten glen
fast tapir
#

There will be lots and lots of info in there, but looking for ip-addresses will point you to the network stuff

bright meteor
fast tapir
#

oop: try /var/log for folder

#

syslog is a file...

bright meteor
#

oh right

#

which one

molten glen
bright meteor
#

oh

#

found it

steady rose
#

^^ yah. that. are you looking for more info on what that is?

bright meteor
#

it's just the regular one

molten glen
#

i already have these but the FSR doesnt fit

#

its hard to lay the FSR flat when its very short

steady rose
#

hmm. those are essentially the same as guide. the FSR pin won't go into a female end connector?

molten glen
#

im going to try once more

steady rose
#

it's a hack. those aren't the exact same style connector.

#

so you may need to push firmly, etc.

fast tapir
ruby night
steady rose
#

might need to mount the pi's other partition from the SD card

molten glen
steady rose
#

the boot one is FAT, so mac is probably auto mounting it

#

@ruby night nice. thanks. that's good info.

molten glen
#

like a generic name

ruby night
molten glen
#

Looks to be what I need, time to buy one.

#

guessing i can use the leads from before after putting the FSR into this connector

#

ohno shipping to UK is very expensive 😟

steady rose
#

try farnell/newark maybe?

molten glen
#

dont think they have it and shipping is still very expensive 😔

#

rs-online has it but need to buy a minimum of 10 and at that point its the same price as shipping from NA

mystic thistle
#

"tca9548a" I have installed the adafruit_tca9548a library via pip3 but the code fails because it says that the module is not found. I also tried the Sparkfun version of this driver and it will not import also. I am trying to connect to the SparkFun qwiic Mux (Adafruit - P4704)

#

Help??

steady rose
#

what was your exact pip install command?

mystic thistle
#

sudo pip3 install sparkfun-qwiic-tca9548a and sudo pip3 install adafruit_tca9548a

#

both said requirement compete (or something like that) @steady rose

steady rose
#

pip3 install adafruit-circuitpython-tca9548a

#

try that

mystic thistle
#

I will try that

#

@steady rose this is what I get:
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: adafruit-circuitpython-tca9548a in /usr/local/lib/python3.7/dist-packages (0.4.0)
Requirement already satisfied: Adafruit-Blinka in /usr/local/lib/python3.7/dist-packages (from adafruit-circuitpython-tca9548a) (6.4.2)
Requirement already satisfied: Adafruit-PlatformDetect>=3.1.0 in /usr/local/lib/python3.7/dist-packages (from Adafruit-Blinka->adafruit-circuitpython-tca9548a) (3.4.1)
Requirement already satisfied: RPi.GPIO in /usr/lib/python3/dist-packages (from Adafruit-Blinka->adafruit-circuitpython-tca9548a) (0.7.0)
Requirement already satisfied: sysv-ipc>=1.1.0 in /usr/local/lib/python3.7/dist-packages (from Adafruit-Blinka->adafruit-circuitpython-tca9548a) (1.1.0)
Requirement already satisfied: pyftdi>=0.40.0 in /usr/local/lib/python3.7/dist-packages (from Adafruit-Blinka->adafruit-circuitpython-tca9548a) (0.52.9)
Requirement already satisfied: Adafruit-PureIO>=1.1.7 in /usr/local/lib/python3.7/dist-packages (from Adafruit-Blinka->adafruit-circuitpython-tca9548a) (1.1.8)
Requirement already satisfied: rpi-ws281x>=4.0.0 in /usr/local/lib/python3.7/dist-packages (from Adafruit-Blinka->adafruit-circuitpython-tca9548a) (4.2.6)
Requirement already satisfied: pyusb>=1.0.0 in /usr/local/lib/python3.7/dist-packages (from pyftdi>=0.40.0->Adafruit-Blinka->adafruit-circuitpython-tca9548a) (1.1.1)
Requirement already satisfied: pyserial>=3.0 in /usr/local/lib/python3.7/dist-packages (from pyftdi>=0.40.0->Adafruit-Blinka->adafruit-circuitpython-tca9548a) (3.5)

steady rose
#

how are you running your code?

mystic thistle
#

In Visual Code Debug and Lint. I get this message
Exception has occurred: ModuleNotFoundError
No module named 'adafruit_tca9548a'
File "/home/pi/Power/Display/battgui.py", line 8, in <module>
import adafruit_tca9548a

steady rose
#

it may be setup or configured for a different python version

mystic thistle
#

Current version of Python is 3.9.0

steady rose
#

not sure. i've never run python that way. but seems like a configuration thing with visual code.

mystic thistle
#

I will get that when running from command line also python3 battdui.py

steady rose
#

same thing from REPL?

mystic thistle
#

not used REPL. Do not know it

faint sparrow
steady rose
# 
 /usr/local/lib/python3.7/dist-packages
#

it's installing in a 3.7 location

#

what do you get from this?

python3 --version
mystic thistle
#

Python 3.7.3

steady rose
#

just to be sure - this is on a Pi?

mystic thistle
#

pi3 but will run on PI0

steady rose
#

ok. one sec. let me boot one up and i'll run you through the REPL thing...

mystic thistle
#

VS Code will not connect to PI0 so I debug and code by moving my SD to th PI3

#

k

steady rose
#

REPL is just interactive python

#

so, try this:

pi@raspberrypi:~ $ python3
Python 3.7.3 (default, Jan 22 2021, 20:04:44) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import adafruit_tca9548a
>>>
#

the >>> is the prompt

mystic thistle
#

got it

#

no error there

#

so it is installed in 3.7 dist not 3.9?

steady rose
#

seems like it

mystic thistle
#

That make sense, the VS Code interpreter was pointing to 3.9. I change that back to 3.7 and the error went away

#

thanks for your help @steady rose 😅

bright meteor
fast tapir
#

The sd card on the pi! This should be somewhere on your finder system

bright meteor
#

oh

#

ok, thank you

#

I'll loook for it soon

mystic thistle
#

Does the adafruit_tca9548a lib work with the SparkFun Qwicc Mux Breakout 8 Channel(Adafruit P4704)?

#

I am connecting multiple LC709203 but I do not see how to address them

#

with the qwicc_tca9548a lib

mystic thistle
#

I actually found the information I needed. Please disregard

bright meteor
#

sorry

#

let me try again

molten glen
#

@steady rose why doesnt this work lol

#

remember that part from yesterday I tried to create my own lmfao

#

I might be onto something...

#

its very cursed

novel bay
#

Would really be grateful if someone could tell me whether a button shim can be combined with an eink display and attached to a RPi without soldering

ashen parcel
novel bay
#

Hey @ashen parcel this is exactly what I'll be using, sorderless headers from pimorini

#

The issue is I'm not sure whether I can add one female header with a shim as well as a pHAT

steady rose
#

@molten glen not sure i fully understand what you're trying there. also, no need to mention just me. lots of helpful people here. can just ask in the open and see who can help.

copper kelp
#

is there a paper somewhere about the pi's GPU's?

copper kelp
#

nvm found it

ashen parcel
#

anyone here able to get MLX90614 working on Pi Pico?

fleet summit
#

my raspberry pi will do internet a bit but then stop

#

like it says connected and it works on other devices

ashen parcel
faint sparrow
#

think i broke my pico first time soldering

#

its not turning on now

wraith grove
#

any bridges?

faint sparrow
#

yea im thinking so

#

gonna fix it later i assume it isnt broken i just need to fix the solder right

pliant fulcrum
#

My code doesnt work, it says there isnt a comment called "text" what should i do?

unknown.png
hidden patio
#

you need to use it, its very important

finite bay
#

You can solder pins like that just fine without flux.

#

But IIRC they didn't have the proper soldering iron.

fierce spire
#

I´m currently accessing my rpi zero via vnc. Is there any way to start my tkinter gui program without booting the desktop to encrease performance?

wraith grove
#

X11 forwarding via SSH?

steady rose
#

@wraith grove -X

ashen parcel
steady rose
#

looks like device number is 0

molten glen
#

whoops i missed a line card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones], a bit confused but i realize that card and device number can be the same.

jade pagoda
#

Eek that soldering

#

Maybe you should practice a bit with regular kits

#

I have a SP25 which can do 0603 with some extended practice and cheap irons can handle 2.54 very well

molten glen
#

Not sure if this is the correct channel, I have a Adafruit Voice Bonnet and the microphones are extremely good apart from the constant electronic whine noise, how do I stop that?

#

from the review page on pimoroni 😟

unknown.png
umbral sable
dapper meteor
#

Hi , what is the wifi range of raspberry Pi 4?

uncut lagoon
#

the important questiona are:

  • where is the pi?
  • how far away you need it to be?
  • what materials are used for the building, if it is indoors?

and other things related to that

dapper meteor
#

@uncut lagoon the pi will be behind the concrete wall and I want it to connect with another device outside of the wall(open area )approx 100 m away.
(And mainly I want to know pi Wi-Fi coverage area approx)
Thanks in advance

uncut lagoon
#

i dont think it will work

#

you can try with an external antenna for the pi zero, but im not sure if the pi 4 has one

#

it seems the pi 4 doesnt have an external antenna, but you can get some cheapo dongle with one

#

wait

#

i was wrong

#

the external antenna on the pi zero seems to be an hack as well

#

an alternative could be an old router, which sometimes may be found for free

#

and you can set some routers as access points, and use it to make a network for the pi, with extra ports

#

or even an old access point

jagged panther
#

how do i setup CCTV without motioneyeos, id like to use rasbian only\

#

think i found some info had to do "CCTV raspberry pi -motioneyeos" i learned how to exclude stuff in a search just now 🤪

hard marsh
#

Hi there... looking for some help on Blinka Bridge. After receiving some number of messages, I get error below. I tried to add gc in the main loop, but no joy. The code running it is basically the demo code, but set to run while TRUE, so it just loops through the after the SCANNING print statement. ```Traceback (most recent call last):
File "ble_broadcastnet_blinka_bridge.py", line 119, in <module>
adafruit_ble_broadcastnet.AdafruitSensorMeasurement, interval=0.5
File "/home/pi/.local/lib/python3.7/site-packages/adafruit_ble/init.py", line 258, in start_scan
active=active,
File "/home/pi/.local/lib/python3.7/site-packages/_bleio/common.py", line 236, in start_scan
active=active,
File "/home/pi/.local/lib/python3.7/site-packages/_bleio/common.py", line 317, in _start_scan_hcitool
stderr=subprocess.DEVNULL,
File "/usr/lib/python3.7/subprocess.py", line 775, in init
restore_signals, start_new_session)
File "/usr/lib/python3.7/subprocess.py", line 1412, in _execute_child
errpipe_read, errpipe_write = os.pipe()
OSError: [Errno 24] Too many open files

steady rose
#

you may have included some creation stuff in the loop that was only meant to run once

#

what line did you add the while True: to?

hard marsh
# steady rose you may have included some creation stuff in the loop that was only meant to run...

Yes, that is exactly the one I am using. As shown below, just after it starts scanning I added the line to make it loop and indented the rest. On the GIT page, line 114. ```print("scanning")
print()
sequence_numbers = {}
while True:
#gc.collect(generation=2)
# By providing Advertisement as well we include everything, not just specif$
for measurement in ble.start_scan(
adafruit_ble_broadcastnet.AdafruitSensorMeasurement, interval=0.5):
reversed_address = [measurement.address.address_bytes[i] for i in range$
sensor_address = "{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}".format(*reverse$
print("Got a measurement")
if sensor_address not in sequence_numbers:

fierce spire
unreal stirrup
#

today I find myself right back at the basics. My button switches are occasionally triggering without me pushing them. They are wired from the raspberry pi pin to the button and then to ground. In the python code I am using the GPIO library with the pull_up.

steady rose
#

still seems like a pull issue maybe?

unreal stirrup
#

so should I try removing the pull_up from the code and adding an external pull_up circuit?

steady rose
#

what GPIO library are you using?

unreal stirrup
#

import RPi.GPIO as GPIO

steady rose
#

can you share, or link, full code?

unreal stirrup
#

my full code is a crazy mess of things. I am over a year into a project (which was probably a little bit more than I have the expertise to complete). I will try to pull the code out for the button to share here

steady rose
#

yah, make just a simple button read program to help sanity check the behavior

#

should be like 10 lines of code

unreal stirrup
#

GPIO.setup(sbutton,GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.add_event_detect(sbutton, GPIO.FALLING, callback=sbutton_interrupt, bouncetime=400)

#

I assume there is someway to put code into the chat better than this. I am looking for the pin number now. I have many units and not all are using the same pin. the basic button code worked when I started the project and only had the button

steady rose
#

write a simple polling code for testing. don't use the edge detect/callback stuff.

unreal stirrup
#

BCM pin 12

#

but my problems are so infrequent that I don't know that I will see a problem with the basic code

steady rose
# 
import RPi.GPIO as GPIO

channel = 12

GPIO.setmode(GPIO.BCM)
GPIO.setup(channel, GPIO.IN, pull_up_down=GPIO.PUD_UP)

while True:
    if GPIO.input(channel):
        # button not pressed
        # print('Input was HIGH')
        pass
    else:
        # button pressed
        print('Input was LOW')
#

run that and let it sit. you should never see any output.

unreal stirrup
#

ok I will go set it up for today and see what happens.

steady rose
#

run it with the HIGH print uncomment just to verify basic functionality

#

but then comment it out for testing

unreal stirrup
#

good advice 🙂

steady rose
#

the output will be spammy, but its simple code for basic testing

unreal stirrup
#

I understand your "output will be spammy" comment now. There is no debounce on the button. I have it setup and running now. I am not fully understanding where this troubleshooting is leading but i am excited to find out. What conclusions are you going to draw if there are no false button presses (without the other electronics running I am guessing that I have a good chance of seeing no false pushes)? And if there are false button presses is this when an external pull-up might help me?

steady rose
#

@unreal stirrup sry, went AFK for a bit. "spammy" as it will print something whether button is pressed or not (if you uncomment lines). so for actual testing, comment out the print statement for when button is NOT pressed. that way you should be able to let it sit there forever and see nothing.

final solstice
#

Question: I'm looking to use PyGame to display an interface on my pi with this H5MI display: https://www.adafruit.com/product/1678

If possible, I'd like to use a headless setup (without desktop).

Will this method pointing PyGame to the framebuffer still work? https://learn.adafruit.com/pi-video-output-using-pygame/pointing-pygame-to-the-framebuffer

I have Raspberry Pi 3 Model B with latest Raspberry Pi OS (buster) installed without Desktop and 8gb of RAM.

HDMI 4 Pi 5" Display not Touchscreen 800x480 - HDMI/VGA/NTSC/PAL

Yes, this is a cute little 5" TFT display with WVGA 800x480 resolution (NOT TOUCHSCREEN). We tried to get the smallest display that would be good for embedded computing usage and at a ...

Adafruit Learning System
Pi Video Output Using pygame

Add a video display to your Pi!

hard marsh
steady rose
#

@hard marsh don't know the solution, but pretty sure it's related to what is happening under the hood. the start_scan call does some subprocess stuff that may leave stuff open with each call.

hard marsh
#

I am learning debugging with Code, so will try to follow it down that hole. Thanks!

steady rose
#

@humble marsh any ideas ^^ BLE related (original issue in scroll back), calling start_scan in loop eventually leads to OSError: [Errno 24] Too many open files

humble marsh
#

@hard marsh try adding ble.stop_scan() at the bottom of the loop, on the same indent level as the for ... start_scan()

#

there may be some other error, but this ameliorate the problem.

hard marsh
humble marsh
#

it should do the stop_scan() automatically, which should terminate the hcitool process, so I'm a little :head_scratch:

hard marsh
hard marsh
# humble marsh it should do the `stop_scan()` automatically, which should terminate the hcitool...

Sad Trombone sound. ```Traceback (most recent call last):
File "ble_broadcastnet_blinka_bridge.py", line 119, in <module>
adafruit_ble_broadcastnet.AdafruitSensorMeasurement, interval=0.5
File "/home/pi/.local/lib/python3.7/site-packages/adafruit_ble/init.py", line 258, in start_scan
active=active,
File "/home/pi/.local/lib/python3.7/site-packages/_bleio/common.py", line 236, in start_scan
active=active,
File "/home/pi/.local/lib/python3.7/site-packages/_bleio/common.py", line 317, in _start_scan_hcitool
stderr=subprocess.DEVNULL,
File "/usr/lib/python3.7/subprocess.py", line 775, in init
restore_signals, start_new_session)
File "/usr/lib/python3.7/subprocess.py", line 1412, in _execute_child
errpipe_read, errpipe_write = os.pipe()
OSError: [Errno 24] Too many open files

humble marsh
#

could you upload your whole program? Use the + button on the left

hard marsh
hard marsh
humble marsh
hard marsh
humble marsh
final solstice
#

Question re-up (let me know if this too frequent) :
I'm looking to use PyGame to display an interface on my pi with this H5MI display: https://www.adafruit.com/product/1678

If possible, I'd like to use a headless setup (without desktop).

Will this method pointing PyGame to the framebuffer still work? https://learn.adafruit.com/pi-video-output-using-pygame/pointing-pygame-to-the-framebuffer

I have Raspberry Pi 3 Model B with latest Raspberry Pi OS (buster) installed without Desktop and 8gb of RAM.

HDMI 4 Pi 5" Display not Touchscreen 800x480 - HDMI/VGA/NTSC/PAL

Yes, this is a cute little 5" TFT display with WVGA 800x480 resolution (NOT TOUCHSCREEN). We tried to get the smallest display that would be good for embedded computing usage and at a ...

Adafruit Learning System
Pi Video Output Using pygame

Add a video display to your Pi!

hard marsh
#

Sorry for the mess above... it does not look like anything installed, but running it now.

humble marsh
#

Do this: cd Adafruit_Blinka_bleio; pip3 install .

#

it did not reinstall, so you are running the old version

hard marsh
#

Ah, did it in the examples folder

humble marsh
#

it tries hard to find Adafruit_Blinka_bleio in the name of stuff it downloaded from pypi.org, so we have to circumvent that

#

I actually did a pip3 install . locally because I was in the repo folder

#

I guessed wrong that it would use the unzipped folder

hard marsh
# humble marsh I guessed wrong that it would use the unzipped folder 
Building wheels for collected packages: adafruit-circuitpython-ble-broadcastnet
  Building wheel for adafruit-circuitpython-ble-broadcastnet (setup.py) ... done
  Created wheel for adafruit-circuitpython-ble-broadcastnet: filename=adafruit_circuitpython_ble_broadcastnet-0.10.6.dev0+gac76109.d20210422-py3-none-any.whl size=6307 sha256=d30f77e562ccc4cac7ee898f428c4ab9ecdfb1efff662cd2a2d06dc5c328fafc
  Stored in directory: /tmp/pip-ephem-wheel-cache-wcn9lxx9/wheels/a5/db/38/77ca41cf35af52b86c3a4e8e752406db5e2a45c06bf9ad77da
Successfully built adafruit-circuitpython-ble-broadcastnet
Installing collected packages: adafruit-circuitpython-ble-broadcastnet
  Attempting uninstall: adafruit-circuitpython-ble-broadcastnet
    Found existing installation: adafruit-circuitpython-ble-broadcastnet 0.10.5
    Uninstalling adafruit-circuitpython-ble-broadcastnet-0.10.5:
      Successfully uninstalled adafruit-circuitpython-ble-broadcastnet-0.10.5
Successfully installed adafruit-circuitpython-ble-broadcastnet-0.10.6.dev0+gac76109.d20210422```
humble marsh
#

it looks like you reinstalled broadcastnet. Unpack the zip somehwere else, like in ~/temp, and then cd Adafruit_Blinka_bleio; pip3 install .

#

are you using a modified copy of broadcastnet?

hard marsh
humble marsh
#

if not do pip3 install adafruit-circuitpython-ble-broadcastnet==0.10.5

#

it is all confused because of where you unpacked the zip. Remove the version from the examples folder and unpack it somewhere else for safety

hard marsh
#

I will do that, take it back to basics.

humble marsh
#

then do pip3 list |grep ble so you can check what versions you have

hard marsh
# 
adafruit-blinka-bleio                   2.2.1.dev0+g03b094d.d20210422
adafruit-circuitpython-ble              7.3.4
adafruit-circuitpython-ble-adafruit     1.2.4
adafruit-circuitpython-ble-broadcastnet 0.10.6.dev0+gac76109.d20210422
bleak                                   0.11.0
blessings                               1.6
#

Should I do the install .10.5?

humble marsh
#

no, your print statements should be fine. That looks good: the blinka-bleio is my test version

#

go ahead and try it; I tested on a pulse oximeter, but not in broadcastnet

hard marsh
#

Running now! I really don't need to see my own pulse between trying to fix this and a Mountain Dew

#

Hmmm, now I see no data at all.

#

It sends every 30 seconds

humble marsh
#

bleh

hard marsh
#

Should I try the simpletest file you included in examples?

humble marsh
#

you could, but it will probably work; there's something about the way you are using it that's different

hard marsh
#

Actually there are just headers in the file. No running code

#

The original GIT code goes through to SCANNING, then immediately to SCAN DONE. When it was working before, it waited until it received the first data, then finished.

humble marsh
#

i see a problem, hold on

#

@hard marsh this is going to take some further more intense debugging; I fixed one problem that should make it work but the Linux state of BLE gets messed up.

#

I can't do this right now but will work on it later

#

if you don't use hcitool/hcidump, then do you not get all the data?

hard marsh
#

All right... any easy way of returning to the semi-functional state?

humble marsh
#

sure just pip3 install adafruit-blinka-bleio==2.2.0. That will install the latest release without patches

hard marsh
#

I will check with hci

humble marsh
#

Put this on your PATH somewhere before /usr/bin/hcitool, and rename it hcitool instead of hcitool.off. You can rename it back and forth to disable/enable using hcitool. This fake version returns with an error and so disables the use of hcitool.

📎 hcitool.off
#

that is what I use for testing with/without the real hcitool

#

and of course chmod +x it

hard marsh
#

ok

hard marsh
#

@humble marsh I actually use a tool called bluetoothctl. Not sure what I am supposed to do with hcitool.

humble marsh
#

hcitool and hcidump are used together by adafruit-blinka-bleio to do scanning

hard marsh
#

Ah, thanks.

humble marsh
hard marsh
#

No, reading it now.

#

Not wishing to be obtuse, but not sure if I am doing that... ```# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries

SPDX-License-Identifier: MIT

"""This is a basic sensor node that uses the internal temperature sensor and reports it every 10
seconds."""

import time
import microcontroller
import adafruit_ble_broadcastnet

print("This is BroadcastNet sensor:", adafruit_ble_broadcastnet.device_address)

while True:
measurement = adafruit_ble_broadcastnet.AdafruitSensorMeasurement()
measurement.temperature = (
microcontroller.cpu.temperature # pylint: disable=no-member
)
print(measurement)
adafruit_ble_broadcastnet.broadcast(measurement)
time.sleep(10)```

#

I thought this send the advertisement and then the data upon reply.

humble marsh
#

broadcastnet is connectionless, it just sends the data to anyone who is listening

hard marsh
#

Ah, got it.

unreal stirrup
#

@steady rose had me run a simple button test script to help me solve my occasional false triggering problem. Now I have a good baseline since in 24 hours I didn't get any false triggers. This of course is with my pi pretty much in sleep mode not when running its lights, selector or display. I was wondering if an external pull-up resistor might help. If so, does 10k for the resistor sound good and do I turn the internal pull_up off?

hard marsh
# humble marsh Put this on your PATH somewhere before `/usr/bin/hcitool`, and rename it `hcitoo...

OK, climbing the learning curve here. There is MUCH conflicting info about putting stuff into PATH. I don't have .bash_profile, .bash_login, or .bash_aliases, there isn't much other than prog completion and bash aliases in .bash_rc, and only the below in .profile. I cannot figure out quite how to "Put this on your PATH somewhere before /usr/bin/hcitool" Can you point me to a better answer (or just give me the spoiler command line)? ```# if running bash
if [ -n "$BASH_VERSION" ]; then
# include .bashrc if it exists
if [ -f "$HOME/.bashrc" ]; then
. "$HOME/.bashrc"
fi
fi

set PATH so it includes user's private bin if it exists

if [ -d "$HOME/bin" ] ; then
PATH="$HOME/bin:$PATH"
fi

set PATH so it includes user's private bin if it exists

if [ -d "$HOME/.local/bin" ] ; then
PATH="$HOME/.local/bin:$PATH"
fi

humble marsh
#

that .profile looks good: Do this:

cd ~
mkdir bin
mv hcitool.off bin/hcitool # will turn it on because it will be in path, before the `/usr/bin/hcitool`
#

now you have a ~/bin directly you can put your own executables into. don't forget to chmod +x bin/hcitool if you haven't already added execute permissions

hard marsh
humble marsh
#

make sure you are getting multiple readings from the sensor. The problem with not using hcitool/hcidump is that the Linux kernel does duplicate advertisement filtering. so you may get only the first reading

#

i think it filters on the sender, not the rest of the data in the advertisement, but I'm not sure off the bat

hard marsh
# 
Done logging measurement to IO. Took 0.4253011050168425 seconds

bridge-dca63203bff5-sensor-ee2f92475c90 [{'key': 'missed-message-count', 'value': 0}, {'key': 'temperature-0', 'value': 29.5}]
Done logging measurement to IO. Took 0.4855495730880648 seconds

bridge-dca63203bff5-sensor-ee2f92475c90 [{'key': 'missed-message-count', 'value': 0}, {'key': 'temperature-0', 'value': 29.5}]
Done logging measurement to IO. Took 0.44616022799164057 seconds

bridge-dca63203bff5-sensor-ee2f92475c90 [{'key': 'missed-message-count', 'value': 2}, {'key': 'temperature-0', 'value': 29.75}]
Done logging measurement to IO. Took 0.4710682409349829 seconds

bridge-dca63203bff5-sensor-ee2f92475c90 [{'key': 'missed-message-count', 'value': 0}, {'key': 'temperature-0', 'value': 29.5}]
Done logging measurement to IO. Took 0.45582288410514593 seconds
humble marsh
#

put your finger on the sensor 🙂

hard marsh
#

I only have one sender running right now

# 
Done logging measurement to IO. Took 0.43507031886838377 seconds

bridge-dca63203bff5-sensor-ee2f92475c90 [{'key': 'missed-message-count', 'value': 2}, {'key': 'temperature-0', 'value': 33.5}]
Done logging measurement to IO. Took 0.45801533991470933 seconds

bridge-dca63203bff5-sensor-ee2f92475c90 [{'key': 'missed-message-count', 'value': 1}, {'key': 'temperature-0', 'value': 34.5}]
Done logging measurement to IO. Took 0.4541545968968421 seconds
#

If you are working on a more permanent fix, can please PM me when I should try it without disabling hcitool?

#

Much easier to deploy that way.

timber shale
#

running sudo ./demo -D0 --led-rows=64 --led-cols=64 --led-chain=4 --led-slowdown-gpio=2 --led-multiplexing=0

#

why? :S

#

in the terminal i can see that it thinks it's a "256x64".... and not "256x256"

timber shale
#

aaaaaaaaaaaaaaaaaaaaaanyyy one?

umbral sable
#

Sounds like the rows/cols/chain parameters aren't quite working like you expect them to... it's treating them like "this is a chain of 4 64x64 panels", which probably isn't what you have.

timber shale
#

i dont know what is happening :S

timber shale
#

😦

timber shale
#

i updated that project with the lastest rpi-rgb-led-matrix library but something is a miss

timber shale
#

so the pattern is
2 on
2 off
2 on
2 off

#

why.... :S

stoic finch
#

Solved my gpio pass through problem with a slightly different cobbler I think

PXL_20210425_185617186.jpg PXL_20210425_185605573.jpg
timber shale
#

that can help me

#

when i try to compile that demo script in there i get

pi@raspberrypi:~/rpi-rgb-led-matrix/Mythical $ sudo gcc main.cpp
/usr/bin/ld: /tmp/ccoeHQYi.o: in function `main':
main.cpp:(.text+0x1c): undefined reference to `rgb_matrix::RGBMatrix::Options::Options()'
/usr/bin/ld: main.cpp:(.text+0x58): undefined reference to `rgb_matrix::RuntimeOptions::RuntimeOptions()'
/usr/bin/ld: main.cpp:(.text+0x80): undefined reference to `rgb_matrix::RGBMatrix::CreateFromFlags(int*, char***, rgb_matrix::RGBMatrix::Options*, rgb_matrix::RuntimeOptions*, bool)'
/usr/bin/ld: main.cpp:(.text+0xac): undefined reference to `rgb_matrix::PrintMatrixFlags(_IO_FILE*, rgb_matrix::RGBMatrix::Options const&, rgb_matrix::RuntimeOptions const&)'
collect2: error: ld returned 1 exit status
umbral sable
#

It looks like it comes with makefiles, so you should probably use those instead of calling gcc directly... there are probably some additional libraries or flags that it needs.

normal vapor
#

so i have raspbian lite, and i need to install raylib onto the pi. i don't have a usb stick, or an sd card

#

what do i do

trail belfry
#

GIT clone the source

#

then follow this guide

#

That would be my guess without any knowledge or experience with raylib

normal vapor
#

alrighty thanks

#

i'm currently cloning it

#

however i wonder

#

there are like 15 releases

#

so how would i clone a certain release

#

can i even do that?

#

actually no i need a specific asset

coral valve
#

Hello everybody. I need help with Raspberry Pi: I need to create an access point that will share TOR traffic. A similar project already exists on Adafruit, but it did not work for me. The access point works, but when I configure routing through the TOR, it stops sharing the internet, but I can still see it in the list of networks. How to make a TOR access point correctly? I use RPi model B+ with TL-WN725N dongle with installed drivers.

hollow mica
coral valve
#

hey guys

coral valve
velvet frigate
coral valve
#

I've tried this one, but how can I install wifi drivers on it?

#

My wifi dongle don't work out of the box, so I need to install wifi drivers every time I run system

coral valve
#

I just found out that I cannot access sites related to TOR, even torproject.org. Could it be possible that TOR is prohibited in my country and I cant create an access point because of this?

uncut lagoon
#

it is possible, yes

#

try using hidemyass.com with the webpage proxy, to try and download the program, if you want

#

or you can try a vpn, like tunnelbear or nordvpn or similars

hollow mica
coral valve
uncut lagoon
#

the access to the tor page has nothing to do with the tor protocol

#

now, it is possible that your isp blocks all tor nodes, so

coral valve
#

ok... i dont understand why none of the TOR AP guides works

uncut lagoon
#

why they dont work?

#

what do you see?

#

what do you get?

#

what happens?

coral valve
#

So I raise my AP with hostapd and dhcp, and it works. Then when I install and configure TOR on my raspberry, i can connect to my AP, but i get "No internet connection"

uncut lagoon
#

can you use the tor browser on your pc?

coral valve
#

yes, it works

uncut lagoon
#

then it is something you are doing

#

have you checked the system logs?

coral valve
#

no

#

I did it about 100 times, manually and with scripts

#

it doesn't work anyway

uncut lagoon
#

nuke it and try again?

coral valve
#

I think to do it again with TorBox

#

and then check logs

uncut lagoon
#

also, make sure the ips are correct

coral valve
#

how? 😄

uncut lagoon
#

i mean, did you even checked what ip your gateway has?

#

or your pc?

coral valve
#

no

uncut lagoon
#

if it worked, it would have been a miracle

coral valve
#

so how can i make it work?

#

TorBox doesn't work because of its new version of raspbian, and i cant install drivers

coral valve
uncut lagoon
#

the website says which specific version to use and has all the links

#

use etcher to write the image to the sd card

coral valve
#

i know, but TorBox is based on the latest version of Raspbian and driver for my wifi-dongle doesnt work

uncut lagoon
#

which pi are you using?

#

a pi zero?

coral valve
#

RPi Model B+

uncut lagoon
#

which one?

coral valve
#

Raspberry Pi 1 Model B+

uncut lagoon
#

and you want to access to it over wifi?

coral valve
#

i want to make it work as AP

#

to share internet

#

with wi-fi dongle

#

i access to it with SSH through Ethernet

uncut lagoon
#

let me guess: you bought the first dongle you saw?

#

and the cheapest one?

quaint schooner
#

whats the TOR box for? entering the deep sice of the network?

uncut lagoon
#

if you know the onion link

#

but also used to go around government censureship and allowing to access content from other countries

#

like, watching videos from bbc uk

#

and also as a layer to anonymize you, but using the tor browser is better for that

quaint schooner
random bison
#

Would a RPi4 CM have enough power to run two motioneye cameras at 1080p? Or should I I with 2x RPi?

uncut lagoon
coral valve
#

it works with standard AP which i can make with hostapd

#

but doesn't work with TOR AP

uncut lagoon
#

weird stuff then

coral valve
#

😦

#

can't find help anywhere

rose gull
#

I have raspberry pi 4
Bought 16 gb mini sim can’t get the os onto it to work someone please help I am very upset I have very limited funds to waste on this !!!!

uncut lagoon
#

make sure the reader is working properly, that the card is properly connected

#

and if you use an sdcard adapter, make sure it isnt locked

quaint schooner
rose gull
#

i know that data is being placed onto the mini sim. I went through a youtube guide 3 times something is being left out!!

uncut lagoon
#

wait, mini sim?

#

like, sim card for phones?

rose gull
#

microsd hc 16gb

rose gull
#

Anybody else have ideas?

mint pagoda
#

@rose gull what file system. Needs to be Fat 32.

rose gull
#

So with the micro as what do I do for fat 32 I downloaded software to format it is that additional or what?

hollow mica
coral valve
#

can i make wifi router based on rpi with completely free vpn?

sacred trellis
#

It depends for what reason do you need a VPN

tidal apex
#

Hi, is there a Jukebox Software besides Vollumio that allows for audio input via Bluetooth?

pseudo chasm
#

Hey, I'm getting an issue where I'm getting a temporary failure in name resolution when i'm on my university network, does anyone have a fix for this?

#

this is the first time I ever received an error like this, all my ssh and remote connections into the pi are working fine, I have a feeling it has something to do with my university network

molten steeple
#

HI! can someone please tell me how do I install the required files on my raspberry? Do I only move them to a specific location? If yes, where to? Thanks!

uncut lagoon
#

you need to create an image on the sdcard

#

its a lot easier if you just use the official raspberry pi imager

#

it does everything for you

#

if you want extra configurations, the latest version has a keyboard shortcut for it

#

im not sure which because it isnt intuitive

molten steeple
#

@uncut lagoon hi, my raspberry is already installed with raspbian os :D. What I meant is how do I install adafruit libraries with circuit python? what I meant there was that I see the files on github, and no installation file. Do I need to just download adafruit-circuitpython files to a specific folder or there's an installation process? Thank you!

uncut lagoon
#

you have to install blinka

#

just the standard pip3 install Adafruit-Blinka

#

(or with sudo)

ruby night
uncut lagoon
#

that's a lot different from what i found o.O

#

wait, that's 1 step next from what i read :x

ruby night
#

once Blinka is inatalled -- you install libraries with pip3 pip3 install adafruit-circuitpython-bme280 for example

#

You need to set up the dependencies -- now there is a script to do most of it for you.

pseudo chasm
#

My pi isn't connecting to the network anymore after i messed around in the interface files trying to connect to the eduroam network at my university, does anyone have a fix for this?

#

Only thing I can think of is completely wiping the sd card and resinstalling everything but I don't want to lose the programs i created in there already

ruby night
#

you can try restoring the originnal /etc/network/interfaces file -- here is what it on mine ```# interfaces(5) file used by ifup(8) and ifdown(8)

Please note that this file is written to be used with dhcpcd

For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'

Include files from /etc/network/interfaces.d:

source-directory /etc/network/interfaces.d

#

or did you change some of the other files as well

proven vigil
#

Hi

#

i have a question about some error!

#

So i was doing raspberry pi with security camera

#

Now let's get the python code running! On the Pi, make a folder on the desktop called mcselfie. It must be the exact name so that the code can run. Open a new tab in your Pi's web browser and go to this shortlink: adafru.it/selfiecode. Extract the .zip file and drag the .py file into the mcselfie folder on your desktop.

#

this shortlink

#

for selfiecode is not working. Where can I find this code? so I can put it on raspberry pi?

#

Thanks!

ruby night
proven vigil
#

how to unlink from dropbox uploader. I put wrong key number

pseudo chasm
ruby night
#

You ‘might’ be able to mount the SD in another Linux computer and edit the file there. If you can get to it.

pseudo chasm
#

i mean, I only really have one code in there for a stepper motor application that was pretty basic, it'll probably save me time just starting the pi from scratch

steady rose
#

you can also edit /boot/wpa_supplicant.conf to try and reconfigure wifi and see if you can get back in

#

if you put the SD card in another PC, the /boot folder should show up

coral valve
#

Hi everyone! Is it possible to turn my Raspberry Pi into a TOR proxy server with worldwide access? For example, can I connect RPi to a router at home and use TOR proxy on it in any place in my country?

hardy plaza
pseudo chasm
hardy plaza
#

But it's easy to waste many hours trying to fix a broken OS, and when you don't have that much invested in the OS it's generally just easier to start over. Like I said, copy the files you've created onto a backup and start over. Life is too short.

coral valve
#

Hi everyone! Is it possible to turn my Raspberry Pi into a TOR proxy server with worldwide access? For example, can I connect RPi to a router at home and use TOR proxy on it in any place in my country?

hardy plaza
# coral valve Hi everyone! Is it possible to turn my Raspberry Pi into a TOR proxy server with...

The answer to your question is yes. The Raspberry Pi is simply a Linux computer, and TOR servers are Linux computers. It's beyond the scope of a chat channel to detail how you'd do that, but there's no inherent limitation in the Raspberry Pi Operating System that would prohibit you from setting it up as a TOR server. Comparing a Raspberry Pi 4 with its on-board network hardware with a dedicated 12 core 32GB Intel i9 Linux box running a fiber NIC on a fast network, but I'm sure you wouldn't expect that kind of performance. But the important thing to remember is that a Pi is simply a Linux computer.

coral valve
#

the main thing i need is worldwide access

#

and i cant find any guides how to do that

hardy plaza
#

But if you do this you should be aware that the moment your Pi is on the Internet it will come under attack. You'd have to security-harden it, especially if it's a TOR server.

mellow condor
#

can i use a 2.2k resistor as a pull up for a switch on the rpis gpio? haven't really done much with gpio

hardy plaza
mellow condor
hardy plaza
mellow condor
#

doesn't really matter, I just need to check whether the switch is flipped or not

#

how about when the switch is open, the gpio reads low

hardy plaza
#

If you want default high you'd tie the GPIO pin to V+ via the 10K resistor, then have the switch connected (as well) to the GPIO pin, it connected to ground (V-). Then when the switch is closed it pulls the pin low.

#

If you want default low you do the opposite.

#

Basically a pull-up or pull-down resistor just takes an open pin (the pin when the switch is not turned on) and pulls it either to positive or negative. The switch then pulls it the other way.

mellow condor
#

so would a pull up resistor be more ideal than a pull down resistor?

hardy plaza
#

No, they're exactly the same thing. It only depends on whether you want your default when the switch is off to be high (+) or low (-).

#

There's no preference except for what you want the default to be when the switch isn't turned on.

mellow condor
#

ah i see thank you

narrow wave
#

Are the castellated edges of the Pico plated?

raw solar
#

Yup!

narrow wave
#

Ooh! Lovely!

raw solar
#

Indeed

fickle spoke
#

I have hooked up two, 14x4 segment displays but cant get them to chain, it just copies the text displayed

#

what needs to happen so that the text appears on the rightmost segment and shifts left, leaving 8 total character spots?

#

I'm using a raspberry pi zero w by the way, let me know if I posted this in the wrong channel

fickle spoke
#

i got it to work

fallow fox
#

as my sensor a problem ?

raw solar
#

Might be faulty? I would try swapping 1 and 2 to see if it makes a difference -- if you see sensor 2 give that same result after swapping, I'd say it's that sensor

fallow fox
#

Yep, after further testing, my sensor seems faulty. But this is really strange that there is no problem before 360 mm

raw solar
#

strange... usually those are either working or totally dead in my experience

fallow fox
raw solar
#

faulty parts suck DX

fallow fox
raw solar
#

weird

umbral sable
fallow fox
#

Well, I will verify ! Maybe it's not the same component !

echo hare
#

Hello everyone, I installed raspbbery pi. I opened the I2C and SPI settings. I wrote a small led code. The code is running but the led is not flashing. I also tried it with the buzzer. I still do not get results. What would be the reason ?

tulip barn
#

How is the LED connected? Straight to GPIO pins or a controller over I2C/SPI?

echo hare
#

straight to GPIO

#

GPIO.BOARD
setup(11, GPIO.OUT)

#

for example

tulip barn
#

assuming you are using board pin 11 (GPIO17) try this and see if it works

#

from gpiozero import LED
from time import sleep

led = LED(17)
led.on()
sleep(2)
led.off()

steady rose
#

which pin are you connected to?

echo hare
#

GPIO 17

steady rose
#

do you have a resistor in line with the LED?

echo hare
#

yes

tulip barn
#

also with where @steady rose is going, make sure the anode (long pin) in connected to GPIO and the cathode (short pin) of the LED is connected to ground

steady rose
#

^^ yep.

echo hare
#

why ? long leg connected ground ?

steady rose
#

well, short pin to resistor, and then resistor to GND

tulip barn
echo hare
#

ı connected to long gpıo 17

#

ı connected short to resistor then rpi ground

lucid crest
#

(Not to disrupt the current help that's happening, but) Could someone help me with an issue I'm having with the Pi and the Pi HQ Camera?

steady rose
#

[GPIO] -- [long leg]LED[short leg] -- {resistor} -- [GND]

echo hare
#

yes

tulip barn
echo hare
#

yes ı tried

#

but code is working

#

led is not open

steady rose
#

direct power the LED to make sure it's good

lucid crest
#

I'm running a Pi4 (8GB) with the RPi HQ Camera. And what I'm trying to do is effectively:

  1. Take an image.
  2. Command a machine to move a little bit.
  3. Repeat a BUNCH of times.
echo hare
#

also ı tried with servo

tulip barn
#

bad led

echo hare
#

dont working

#

are gpıos pin dont working?

lucid crest
#

The problem I'm having is that I'm trying to optimize the code to make it run quicker. I'm unable to get the camera's turn around time for the image to be less than 1 second.

tulip barn
#

can you take a photo of your wiring and post it here @echo hare ?

steady rose
#

a servo and buzzer work differently than an LED

lucid crest
#

This is with both the picamera Python module and with the built in raspistill command.

echo hare
echo hare
steady rose
#

wrong pins

echo hare
#

why?

steady rose
echo hare
#

where?

#

import RPi.GPIO as GPIO
import time

steady rose
#

up in that image is toward board edge

echo hare
#

GPIO.setmode(GPIO.BOARD)

echo hare
#

thank you

#

my problem

#

I apologize for wasting your time

steady rose
echo hare
#

thank you for eveything

tulip barn
lucid crest
steady rose
#

not sure how much of this applies to HQ camera

#

but you may have to do some playing around with mode/settings/etc.

tulip barn
#

i only have the V2 camera i can test it on.

lucid crest
#

I tried the same on the Jetson Nano, and was able to get the 30 frames per second. With the huge caveat that it had a 3 second overhead time.

tulip barn
#

i assume you are using camera.capture(filename) after wards are you camera.stop_preview()?

lucid crest
#

I'm using camera.capture(), and I'm doing so without starting the preview, so I'm not stopping it.

tulip barn
#

try starting the preview right after you start your code and just leave it on and see how fast you can caputre

#

like start it before your functions

lucid crest
lucid crest
tulip barn
#

from picamera import PiCamera
camera = PiCamera()
camera.start_preview() # activate camera

your code.....

steady rose
#

it's been years, but i sort of remember playing similar games with V2 camera for something i was working on

#

knowing those underlying details about the actual hardware modes and plumbing helped

tulip barn
tulip barn
lucid crest
#

So, here's my code:

camera.framerate=30
time.sleep(2)
camera.start_preview()
time.sleep(2)
last = time.perf_counter()
for _ in range(0,10):
    camera.capture(filename,'rgb')
curr = time.perf_counter()
print(repr(curr-last))
camera.stop_preview()```
#

(And turns out, picamera decided to evict itself from my venv.... so that was weird.)

#

In the end, it needs to be a raw value (thus the 'rgb' in capture), but the timer responds with 12.5 seconds for jpg and 23-25 seconds for rgb

tulip barn
#

let me try that on my non HQ camera and see what i get

lucid crest
#

Ok, thanks. (I've omitted the housekeeping stuff up top btw, like the imports and initialization)

tulip barn
#

thats fine. i'm working through my own issues right now with the camera lol

#

just about done

lucid crest
#

Btw, I tried setting the framerate, awb, exposure mode and shutter speeds, but no change in timing. (The pictures are terrible though 😄 )

#

The next thing I'm investigating is if the port selection makes a difference. There seems to be a port splitter function within the picamera code, and I'm curious if that is affecting anything.

tulip barn
#

ok i got mine to 6.4

steady rose
#

^^ yep. all sounds very similar to what i went through.

tulip barn
#

but i had to drop the resolution significantly

steady rose
#

it wasn't focused on fast acquisition time though. it was more for "manual" control

lucid crest
tulip barn
#

yes

#

let me change the code to rename each file

lucid crest
#

Ok, that's reassuring.

#

I've actually been keeping the filename the same, so don't worry about it. It's an apples to apples comparison.

tulip barn
#

no, i want to see the timestamps

lucid crest
#

AH

#

I'll try dropping the resolution to see if that changes anything. Unfortunately though, for my application, I need all the pixels I can get.

tulip barn
#

ok

#

4.49 seconds