Questions tagged [python]
Python is a general-purpose, dynamically typed, object-oriented high-level programming language. Interpreters for versions 3.x and 2.x come installed on the Raspberry Pi's most popular operating system distributions.
3,205
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Error loading shared library on python
I'm trying to get a piece of code running on a raspberry pi model 4b that I believe was previously running of a server running Debian10 (although now I am not so sure). The code errors at this line
...
- 21
2
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2
answers
277
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HC-SR04 sensor's ECHO pin stuck on HIGH
I have a raspberry pi 4 and a HC-SR04 ultrasonic distance sensor. I want to use it in a raspberry-pi based robot. The other features look fine, the robot can move, et cetera.
But my code for the ...
- 21
1
vote
1
answer
22
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Scheduled screen dimming with mouse interrupt not working
I have the official raspberry pi 7" touch screen and I'm struggling to get my python script to reset the screen brightness when I touch the screen.
I've setup a service that calls my ...
- 11
0
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1
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183
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Python requests is too slow with certain WI-FI connection
I'm working on a TTS app using AWS Polly in Raspberry PI 3 B+ and when I post a text using Python requests it take a long time receive the response, around 16-17 seconds. This happens only with a ...
- 111
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0
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23
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GPIO Switch Issue
I am writing a PICO application that sends a urequest.
So far, I have everything done to what I feel is right until I execute python.
In my code, I have a while True statement starting my loop, so its ...
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1
answer
154
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Playing audio with Python scrpitpt run from Cron
I have a USB sound card connecting mic & speakers to a Raspberry Pi Zero W +
The following script plays audio fine when run from the terminal. However, when run from cron, nothing can be heard.
...
- 121
1
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0
answers
37
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Issue a custom command using pitunnel
I have a Pi 4 at home, which is wired in to some servos which, via a python script, make hands turn on a clock face, making them point to 'home', 'work', 'school' etc - I think you can see what this ...
- 111
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1
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2k
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Can't install Opencv on raspberry pi 4
I'm using the raspberry pi 4 (pip version: pip 22.3.1, python version: 3.9.2) on visual studio code and whenever I enter the command pip install opencv-python in the terminal, after 40 mins I get the ...
- 13
2
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0
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220
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Problem with the import bluetooth!
I have tried a lot of this lines programs but the terminal it keep's complaint.
Error message:
Import Error:No module named bluetooth._bluetooth
I have install some lib but again the problem it shows. ...
- 21
1
vote
2
answers
610
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Run python script with GUI on boot
I have set up a python script, that uses tkinter to launch a window and display some data.
My goal now is to let the Pi run this script after boot. For this, I tried many ways I found on the internet. ...
- 21
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0
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130
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Playing random Videos with omxplayer (PIR) [closed]
I am trying to do the following: I connected a PIR-Sensor to my raspberry pi to detect motion. If there is motion detected my pi should play random videos from the folder "videos" (about 20-...
- 11
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0
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99
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Command Raspberry Pi 4 GPIO via bash Windows 10
from RPi import GPIO
global ON
global OFF
OFF = GPIO.LOW
ON = GPIO.HIGH
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(21, GPIO.OUT)
x = open(testo.txt")
if x.read() == "true"...
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0
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2
answers
525
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How to make systemd wait for my network to come online?
I've created the following systemd unit:
[Unit]
Description=MagicMirrorConfig
After=network-online.target
Wants=network-online.target
[Service]
ExecStart=sh /home/pi/magicmirror-config/launcher.sh
...
- 101
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0
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71
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If I start a script using audostart where do my logs go?
I've added an entry to my /etc/xdg/lxsession/LXDE-pi/autostart file as follows:
@lxpanel --profile LXDE-pi
@pcmanfm --desktop --profile LXDE-pi
@xscreensaver -no-splash
@/usr/bin/python /home/pi/...
- 101
0
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0
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43
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No response from urllib3 package as of December 2022
for months I have used my Raspberry Pi (Raspbian version 10 [Buster]) to query different APIs using different python packages (such as tgtg or spotipy. Everything worked perfectly until the start of ...
- 63
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0
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62
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Not synchronized audio and video recorded with python
i bought an USB microphone and a Camera module for the raspberry pi4.
I managed to record Audio and Video but when i merge them with ffmpeg the are not synchronized, i'm trying to solve this for 2 ...
- 1
0
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0
answers
10
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plolty DASH on Raspberry pi 3+B
I have a question. I have written a python script in a raspberry pi3 to get data from a sensor and plot it with dash in Browser once per second. It works very well with pretty good accuracy when I do ...
0
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0
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66
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pyenv deletes python after installing
I try installing python with
pyenv install 3.11.0
(though this happens no matter the version) on my Raspberry Pi. When the install is running, there's a 3.11.0 directory in ~/.pyenv/versions, pyenv ...
- 101
1
vote
2
answers
193
views
Python script will not write out file when scheduled (cron or bash.rc)
I have a python script to record a .mp4 file with picamera2 which executes and save correctly when run through the editor (thonny) and through the terminal. However, when I schedule it through crontab ...
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1
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0
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35
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Why would an app started by systemd on boot perform differently [closed]
I have a python application that I'm trying to start using systemd. I have my unit file set up and systemd configured to start the app. When I sudo systemctl start my_app.service it starts and ...
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0
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0
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70
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Why does my script fails on autostart but works fine when executed manually?
I am using a python script to send a json to an arduino to controll led intensity by pwm. The script parses a csv file to find the current led instensity to set up. The script looks like that:
#!/usr/...
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2
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1
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4k
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Python 3.11.0 Import sqlite not found
I've tried
python -m pip install -U sqlite
it returns
No matching distribution found for sqlite
I'm using python 3.11.0
1
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0
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217
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Rpi4b -> Use Serial HC-12 SI4463 Transceiver to send to Generic RF outlets and 433 switches
Raspberry Pi4B
Hi, I am using a 433 MHZ TX/RX kit connected via GPIO pin 27 for receive and GPIO pin 22 to send signals to my RF power outlets and receive signals from my 433mhz Wireless Magnetic Door ...
- 111
3
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2
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3k
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my raspberry pi pico oled display code is returning 'OSError: [Errno 5] EIO'
I've been trying to use an ssd1306 oled display with a raspberry pi pico but every time I run the code it returns an error. I don't know what the error means and can't really find anything online for ...
- 31
1
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1
answer
113
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My Application (based on python tkinter) is not running at Boot time (autostart) in Raspberry Pi Os?
I have made executable file of python tkinter application. It runs well when clicked. But I want to run it at Boot time (AutoStart) in Raspberry Pi Os.
I have tried many methods but they didn't work.
...
1
vote
1
answer
303
views
Python function following physical input not working with kivy
I'm trying to create this functionality that when a physical button is pressed a function is called that if true opens a popup on the main Kivy screen.
The idea was to have the display showing the ...
- 23
0
votes
1
answer
2k
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TypeError: unsupported format string passed to NoneType.__format__
I have 3 DHT22 sensor connected to my Raspberry Pi. Two connected to 5V, 1 to 3.3V.
Initially this worked fine. Now, one of the scripts running one of the sensors gives me this error:
RuntimeError, ...
- 23
1
vote
1
answer
89
views
gpiozero's wait for release not working as it should
I'm trying to build a program that has 2 inputs connected to 2 limit switches and each of these needs to be first opened and then closed before the function respective to each button begins. As a ...
- 23
0
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0
answers
33
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LoRa HAT communication module don't send anything
I'm working now an long range communication system, and I need help. I can't use GSM, WIFI, etc. I test one LoRa Raspberry pi shield, and I bought this: link, and I have followed this tutorial. Ofc I ...
- 1
1
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0
answers
259
views
Python flask webservice can be reached when on LAN, not on WLAN
So I'm running a simple (python) flask web service on the Raspberry Pi
@app.route("/", methods=["GET"])
def hello():
now = datetime.datetime.now()
timeString = now.strftime(...
- 11
1
vote
2
answers
137
views
Problems with I2C communication
Hi I am attempting to test I2C comms between an pi model 4B and teensy 4.1 (running code uploaded from the arduino IDE via usb). While I can read from the slave with a python script if the arduino ...
0
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0
answers
72
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raspberry pi 4b, python, opencv, When trying to process video frames the instructions do not run sequentially
I have a problem when executing the programme below, So basically what's happening is when I execute the programme I expect it to open the camera (logitec usb camera) capture a frame, process it, ...
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0
answers
82
views
Thonny Python while loop - output "flashing"
I have a test program I am working on. I am using a Raspberry Pi 4B running Thonny Python controlling an HT16K33 LED Driver via I2C.
My code right now is simple:
import board
import time
from ...
- 11
2
votes
0
answers
503
views
pigpio Python Raspberry Pi wave PWM generation
I am using pigpio to generate a PWM signal varying in time. I create a wave, which contains one period of a sine wave, in the form of PWM signal. I use wave_send_using_mode and WAVE_MODE_REPEAT_SYNC ...
- 21
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0
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403
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Raspberry Pi and OpenCV. The cv2.error while capture the image through camera lens
https://stackoverflow.com/questions/43572387/error-215-size-width0-size-height0-occurred-when-attempting-to-display-a
I have the similar issue with this discussion, after I read it still don't have ...
- 133
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1
answer
119
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Measurement in realtime Raspberry Pi 3
I have written a script in python in my Raspberry Pi 3, to get and plot data in real-time from an ADC.
The problem is that the data is not time accurate. I want my data to be read once per second or ...
1
vote
1
answer
1k
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Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly
I'm trying to install opencv on a raspberryPI 4 (RaspberryPI OS Bullseye x64, Python 9), that is part of installing all the dependencies for this tutorial but it always fails with the error below.
I ...
- 111
1
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1
answer
1k
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Trouble using Tensorflow: SyntaxError
I'm trying to use the LSTM neural network found here on my Raspberry Pi 4 Model B
https://machinelearningmastery.com/text-generation-lstm-recurrent-neural-networks-python-keras/
I have trouble running ...
- 23
2
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0
answers
35
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Moisture sensor gives weird results when connected to a relay
I was about to review the items as faulty when I connected my brain and made a second test.
The sensor is supposed to return 0 when dry and 1 when wet. In my script I repeat the reading 100 times. I ...
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0
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75
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RuntimeWarning: GPIO.setup(pin_rst,GPIO.OUT)
My python script was executed in the past 10 days without issues. I had to do some troubleshooting to find what is causing the problem.
Here is part of my code where the issue is caused:
from mfrc522 ...
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0
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116
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Is there any sound card or ADC for Raspberry Pi 4 available in the market?
The currently used sound card is "HIFIBERRY DAC+ ADC", I want to use the ADC function to recover the "modulated carrier signal (PSK, FSK)", because the "gnuradio" block ...
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0
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104
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Adding LUTs and film grain overlays to raspicam
learning python and such by coding and building a camera using the High Quality Camera. Being able to code physical inputs to control the various camera functions was a major win for me, so I don’t ...
- 119
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1
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291
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How do I take in recurring snaps from MLX90640 Thermal Camera?
I'm using an MLX90640 Thermal Camera and I got it to work after some time through a Raspberry Pi.
What I am trying to do however is take in a picture every minute (or every few minutes) from what it ...
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0
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0
answers
103
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PIR Sensor Triggering Script Doesnt Loop
I'm using trying to create a living portrait that triggers by motion. The idea is a pi4b connected to a lcd monitor that displays a picture. On motion the picture kicks over to video and morphs. Its a ...
0
votes
1
answer
681
views
Can't install PyBluez2 on Raspbian
Title - I can't install pybluez2:
bluetooth/linux/bluez/btmodule.c:20:10: fatal error: btmodule.h: No such file or directory
20 | #include "btmodule.h"
| ^~~~~~~~~~~~
...
- 113
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1
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656
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Why am I getting this syntax error in micropython?
I am testing the raspberry pi pico, and am getting a strange syntax error. I have no idea why.
from time import sleep
led = Pin(25, Pin.OUT)
wait = 0.1
while True
for x in range(9)
wait += ...
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1
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1
answer
312
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Rasperry Pi 4 - Python i2c Device Not Found
I'm having a hard time setting up a i2c device on a pi4.
I did i2cdetect -y 1
But when I run the python code
import board
import busio
import adafruit_ads1x15.ads1115 as ADS
i2c = busio.I2C(board....
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votes
1
answer
117
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pigpio I2C error
I would like to write 16 bits of data to an I2C bus. Considering that the data to be transferred is not in a list, I am using the pi.i2c_write_device() function, however I get the following error:
...
1
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1
answer
264
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RpiZero and RpiPico communication through nrf24l01 not receiving packages
I am trying to implement a wireless communication between RpiZero and RpiPico through NRF24l01 modules.
Pico is the receiver, and Zero is the transmitter.
I have successfully started the Pico ...
- 141
0
votes
1
answer
950
views
pyserial and parity check
I am using pyserial library to deal with serial communications between my CM4 and a particular device.
This are my settings:
_baudrate = 9600
_parity=serial.PARITY_EVEN
_stopbits=serial.STOPBITS_ONE
...
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