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.
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How to write a code to toggle switch that will read to custom GUI
Hi im new to the raspberry pi world and im trying to see where to start on creating a code that will read to my GUI from a toggle switch i have as hardware. I've seen alot of push button codes, but ...
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How to toggle button on and off with gpiozero?
Abandoned post by Unregistered user.
I can't seem to find a solution of doing this using gpiozero. I've done it using rpi.gpio with add_event_detect and call back to change state but I was under the ...
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Button.when_activated event is not firing even though Button.is_active is setting correctly
Thanks in advance!
I am using a Pi 3B to detect activation of a sensor on my model railroad layout. The sensor by default only offers a rising edge detection scenario. I decided to go with gpiozero ...
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Make screenshot of a program without being connected to a monitor
I am working on a project at a company where I read the temperature of a machine with a raspberry pi. I have downloaded the necessary program and can use it through Wine.
In addition, I have made a ...
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How to transmit hand gesture data from a laptop to Raspberry-pi
I am making a hand gesture bot. In this hand gestures are detected from a laptop using image processing (used OpenCV & Python). I don't know how to transmit real-time output wirelessly of image ...
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Upgraded RPi and lost my functionality using gpio zero
Recently upgraded my RPi and lost my LED functionality
I've installed all kinds of things to attempt to resolve this and no success
Thanks
pi@JASPER:~/controls $ python controlscript.py
Traceback (...
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ShiftBrite - running on Python
I was wondering if anyone can help me out with converting the example Shiftbrite Arduino code into Python so I can run it on my RPi. Here is the example code in question:
int datapin = 10; // DI
int ...
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mq5 gas sensor not alerting of leakages
I'm currently using an mq5 gas sensor in my kitchen with the MCP3208 ADC. my code shows a continuous loop of the voltage charge. in the mq5 as it detects gases in the air. It is supposed to print ("...
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smbus write_word_data command
I am trying to use the smbus write_word_data command which takes three arguments addr, cmd, value - all of the documentation that I can find tells me that I need to specify cmd, but gives no clue as ...
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Python Script that handles Bluetooth doesn't work when loaded on startup
Background
I am using my Raspberry Pi B+ to control a 32x32 LED matrix and I am trying to send commands from an Android app to my Pi over bluetooth to display text on the LED matrix. I am using ...
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Raspberry Pi - Press for on / Press for off switch
I've begun tinkering with using electronics and am also new to using Python.
I was wondering if someone could help me please?
What I'm trying to achieve is to use an on/off switch to run a motor - ...
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Audio cuts out periodically when using audio hat
I am currently live streaming some audio to and from a raspberry Pi Zero W using the waveshare audio hat however I have found that the audio periodically cuts out when I do this. When I used my logic ...
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BME280 sensor: OSError [Errno 5]
I recently bought a Raspberry Pi 4B along with a BME280 T/P/humidity sensor. I use the bme280 and smbus2 Python libraries to interface with the sensor. For a while it worked pretty well, but yesterday ...
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Controlling Raspberry Pi GPIO with c and Python
I was searching for C and Python Libraries which support Pi4.
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py-spidev and ADNS3080
I have been trying a lot to deal with the flow-motion sensor but I couldn't arrive to a clear result. It might be I can't understand the procedure..
I'm using cs1 on raspberry Defining the spi by ...
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WS2812B LED strip problems
For starters, I'm using a generic 5 meter, 30 pixels/meter, 5V WS2812B LED strip. I've got a 5V/20A (100W) power supply as well.
I'm using the adafruit-circuitpython-neopixel library, and my code I've ...
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OLED 128x128 is not displaying correctly the colors
I'm having trouble using the OLED SSD1351. I'm running python programs with the luma.oled library.
When I run a program that uses colors, these are displayed incorrectly, red is displayed like blue, ...
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OBD Raspberry Pi bluetooth and serial connections issues
So I've been trying to get my digital dashboard code working and I have to connect to the OBD plug to the Pi but ive run into a plethora of issues since then. The first time I did it, the OBD device ...
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Autostart python programm
i prefer ask you that i'm French ^^
So I will be very simple.
I would like, when i start my raspberry a execution of my python file.
That is to says, I want that when my pi starting the programm is ...
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Raspberry Pi 3 & Arduino: [bluetooth.btcommon.BluetoothError: (112, 'Host is down')]
I am trying to send informations from Raspberry Pi 3 to Arduino Uno with bluetooth. I managed to connect the Arduino's bluetooth module with the Raspberry Pi.
But I have this error when I execute my ...
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unable to install drawnow package
when I try to install the drawnow package, there are some mistakes.
I type
sudo pip install drawnow
it returns
pi@raspberrypi:~ $ sudo pip install drawnow
Looking in indexes: https://pypi.org/simple, ...
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Listen for certain keyboard input and insert to SQL Server DB
I have a USB NFC reader (acts as an emulated keyboard that types out the 10 digit ID number on the card when scanned).
I want an app to listen for this input and when it sees 10 digits, I want it to ...
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BlueZ BTGATT-client.py WriteValue
I had a successful attempts with BlueZ-5.50 > test > example-gatt-client.py with ESP32 set as HeartRate Sensor Server.I am able to read from ESP32 which i modified to suit the BlueZ example.
...
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Access the display from a python app running as a service
Problem: The code below can't access the display when running as a service.
I have my raspi hooked up to a touch screen monitor in the kitchen and I've attached a Passive Infrared sensor to the GPIO ...
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SPI clock is not switching on RPi
I need to use SPI for a project I'm working on with a Raspberry PI, but the little bit of test code I wrote doesn't seem to work.
#test program for spi
import spidev
import RPi.GPIO as GPIO
from time ...
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Problems Connecting to Bluetooth devices through python
I am trying to write a simple python script that connects any bluetooth audio device to the raspberry pi 4. I keep getting "bluetooth.btcommon.BluetoothError: (111, 'Connection refused')"
Here is ...
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Scan Distance from Eddystone Beacons
I would like to read an Eddystone Beacon using my Raspberry Pi 3 to calculate distance from the beacon.
I can't find any resources to do this from the official Eddystone documentation.
How should I go ...
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Rpi Zero W - How to automatically accept bluetooth pairing and log mac and info request?
I am using Raspbian Stretch 9.4 on a Zero W. The goal is to deploy it headless for long periods of time where it will broadcast a specified bluetooth signal. When someone tries to connect to it, it ...
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RPi Zero as 4-pin-fan-controller: Faulty RPM readings on open collector with gpiozero
Introduction and Goal
Disclaimer: I do not have profound but basic knowledge in electronics and hardware and my python is a bit rusty. For tl;dr, jump to the problem section below.
Hello,
I'm trying ...
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Issue in installing mediapipe on Raspberry Pi 3B
I am trying to install mediapipe on my Raspberry Pi 3B running Raspbian GNU/Linux 12 (bookworm) on ARMv7 Processor rev 4 (v7l).
I have created a virtual environment, venv and already installed opencv-...
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Buffer size for /dev/ttyS0 in python
I got a Raspberry Pi 4 processing Lidar data (RPLIDAR S2) with python (PySerial library). The lidar sends data in chunks of about 50-60 bytes at 1000000 bps over serial. When I use a USB Serial FTDI ...
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Cannot turn web streaming into a function
I'm working on a project with my Raspberry Pi 0 and a camera. I'm writing my code in Python using the PiCamera module.
This file handles setting up the camera and Starting Web streaming. I had no clue ...
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ALSA issue with Raspberry Pi 4b and voice recognition
I get the following error, and it does not return the speech_recognition information:
Expression 'GetExactSampleRate( hwParams, &defaultSr )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: ...
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RFID RC522 Reader & Chromium Web Page
I'm having a bit of difficulty locating a specific example, however I have found people referencing that they have accomplished what I am looking for.
At a basic level, I have a webpage being served ...
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Error trying to install python-firebase on Raspberry Pi 3
I have installed requests but I'm unable to install the python-firebase package.
I want to fetch data from firebase on my Raspberry Pi 3. I have used the following code to do the same on my PC.
from ...
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Raspberry pi 3 reading serial port
I have a python code that reads the serial port of the raspberry pi 3to obtain GPS positions from a fona808. The code works for some time and then throws this error.
Traceback (most recent call last):...
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Sending UDM message from Raspberry via SIM900a GPRS module in python. 1nce provider
I'm trying to send a UDP message via GPRS service from Raspberry but nothing happens. Here is my code. Any advice?
Sorry, but this is my first question on StackOverflow.
Thanks
import time
import ...
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Read Location from SIM868 while using as PPP(Modem Mode) on Raspberry
I trying to get device location using linked sim868 shield on Raspberry 3A+.
State: I have got successfully get device location with AT+ commands via UART protocol using Python.
State: I have got ...
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Running python GUI application with PyQt and python-vlc as a service
I'm trying to run a python GUI application as a service. The application is using PyQt5 and python-vlc packages. I have the following service file:
[Unit]
Description="Python VLC Service Test&...
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Kivy won't listen to "fulllscreen" setting
Working on a Raspberry Pi Model 3 B, running raspbian.
Running Kivy v1.9.2-dev0 and Python v2.7.3
Trying out one of the Kivy examples but for some reason the application won't come up in "Windowed ...
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Problem with GPS module and Python
I copied a program from the Adafruit webpage to test my GPS module and before running it I installed the Python gps with sudo apt-get install python-gps but when I run the program I get this error:
...
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Kumantech 3.5" LCD Touch Display, Python Library
I've a Kumantech 3,5" LCD Touch Display in front of me. I'm trying to find a python library to controll the LCD, because i don't want to use x or just to console. I couldn't find any. And I couldn't ...
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Problem with i2c communication between arduino and raspberrypi
I have connected Rpi with Arduino using i2c communication. Pin Configuration: Rpi ---- Arduino Mega SDA SDA SCL SCL GND GND
I also have an encoder attached to Rpi. Encoder `------ Rpi 5V 5V Gnd Gnd ...
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Automatic execution of a Python script using a Raspberry Pi 4
Im programming on a Raspberry Pi 4 and trying to make a python script start automatically, when powering on. The python script is working and has no errors.
I tried to insert a starting command in /....
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PSUTIL: module 'psutil' has no attribute 'getloadavg'
I'm teaching myself python with the aim of building a small, off-grid server for collecting/transmitting data on my rpi. One of the datasets I'd like to collect is the CPU load by making calls to ...
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can't get audio to play from python, on raspberry pi
I have a Raspberry Pi 3B+
For speaker, I have some ear phones plugged into the 3.5mm audio jack.
If I try
pi@raspberrypi:~ $ omxplayer ./mario1.mp3
Audio codec mp3float channels 2 samplerate 44100 ...
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Audio Processing Issues in PyAudio in RPi
Basically, I want to analyse the spectrum of the input audio stream to my Raspberry Pi. I have configured my Audio USB Adapter and ran sample tests on Play and Record.
I am using PyAudio to take ...
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controlling a continuous servo in both directions
I'm using a Fitec FS90R continuous servo with my Raspberry Pi Zero, and trying to make it turn slowly in either direction (it's controlling a small turntable with a display on it).
My test script is ...
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How to solve segmentation fault error on raspberry pi 4
I am currently trying to use yolov8 to perform object detection on the raspberry pi 4. I have installed ultralytics and other necessary packages but whenever i run the code on the terminal it says &...
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Access GPIO pins through a Flask + Apache/mod_wsgi
I get an internal server error when I import the gpio pins library in my simple __init__.py file. And the debugger doesn't show up.
As I understand it, the server doesn't have the permission to ...
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