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.
3,206
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GPIO input pins high at 3V, and detect when ground is connected when I want it to detect when 3V is connected
This is on a Raspberry Pi Zero 2 W
The physical pin 3 and 5 (gpio2 and gpio3) are the input pins I am using and for whatever reason, they are at default 3V and detect a change when they are connected ...
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How to write a code to toggle switch that will read to custom GUI [closed]
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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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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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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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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68
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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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34
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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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67
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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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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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How to selectively read Mifare blocks with an NFC reader?
I want to use a RPi combined with a RC522 NFC reader to make a Mifare card-based authentication system(1). I am struggling with the capacity to read selected blocks of data on the NFC card.
I have ...
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68
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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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pymodus unknown message
I am using Pymodbus in Raspberry Pi for data acquisition from Modbus rtu (RS485) sensors. Other sensors worked perfectly fine so coding is ok.
However one particular sensors is giving me this message ...
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69
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Connecting Two SPI LCD to raspberry pi GPIO pins
I am doing my NEA project right now and I have a problem using 2 TFT LCD. Here are more details about the LCD 2.8" LCD SPI, Driver: ili9341 with touch version 1.2, this a picture of it:
I have ...
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1
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64
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PWM output frequency incorrect
I am trying to create an accurate PWM output using a raspberry pi, model 4b, and hope you can help.
At this stage I am wanting to; change the Duty cycle and frequency, run the code, and see these ...
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Issue with running multiple processes on a single webcam with Raspberry Pi 4
I have a Python program that utilizes threading to run multiple processes on a single webcam. The code works perfectly fine on my laptop, where it can run different processes simultaneously on one ...
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1
answer
20
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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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Where does Pico micropython print go with main.py?
If you load a main.py file onto the Pico with micropython firmware running, it will run on startup. I can tell that this is working because I observe GPIO outputs changing, etc.
However, I'm not sure ...
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800
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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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1
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45
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How to put Raspberry Pi into shutdown by keypress/hold?
I am running latest retropie on a rpi3b+. I am also using retrogame to map GPIO pins the keyboard keys to arcade buttons.
What I would like to do is run the sudo shutdown command if a designated key (...
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67
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Failed to add edge detection - Raspberry Pi 4 GPIO
I am trying to run a LoRa receiver using python
from time import sleep
from SX127x.LoRa import *
from SX127x.board_config import BOARD
BOARD.setup()
class LoRaRcvCont(LoRa):
def __init__(self, ...
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1
answer
80
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Adding a WiFi network with Python over bluetooth
I'm working on a project where a mobile app can find and pair with a headless raspberry pi running Pi OS (Debian Buster Port) over bluetooth, send it an ssid and password and it'll create and hop on ...
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Why My Spi Connection Is Not Getting started?
Hello Guys I Am New To Embedded & Rasberry PI. So In Order To Understand SPI Connection I Made An PI-PI SPI Setup PS. I am Using Two Rasbrry Pi Model 4 B with Raspi OS & i did the followings ...
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166
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Bleak/Python: BLE filtered scan with timeout, and getting AD data
My task is to scan for x seconds for a BLE device with a specific name or service UUID, then get the RSSI value for returned device(s).
Bleak seems to be the best option as far as I can see. I've been ...
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1
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235
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Camera Module 3 / PiCamera not working on Ubuntu Raspberry Pi
I have a Raspberry pi 4B with Ubuntu, and I’m trying to use my camera module 3 with python (I’ve tested the code with Raspberry Pi OS, so I know it’s right) using PiCamera and in a virtual environment ...
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1
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236
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Python PIP not working after upgrade
How do I fix this? I was trying to upgrade my Python to 3.10.2 which works fine. However, pip is throwing errors.
These are the steps I followed to upgrade:
#Downloaded new version and Extracted ...
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0
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78
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Gpredict and Hamlib's rotctld problem. AZ & EL reads error message in Rotator controll section
I'm trying to build an automatic tracking system to track CubeSats with my Raspberry Pi 4B using GitHub Python code to emulate the Yaesu GS-232B and Gpredict via TCP 4533 to control a future Yaesu ...
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2
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1
answer
120
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How to create open network for Raspberry Pi Pico using micropython?
I seem so close to getting it working but every route I take just doesn't seem to work. I'm trying to make an access point from my Raspberry Pi Pico with no password. SOUNDS SIMPLE DOESN'T IT. Here's ...
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Raspberry Pi 4B - VLC player - Pir Sensor - Camera
I'm starting to know Python, so you can say I'm a newby.
For Halloween I'm working with a Python script for a Scare.
The idea is to show a nice picture (a paused video) on a tv screen and when motion ...
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43
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wired connection between raspberry pi and android app
I am reading Can data with Pcan, and I am transferring my Can data to my Raspberry Pi 4. With this code
import can
import serial
# CAN bus setup
can_bus = can.interface.Bus(bustype="pcan", ...
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1
answer
142
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server stuck at socket.accept()
I am trying to establish the connection between my pc (windows11) and rpi 4 (buster v10). I have set rpi as an access point so that it has a fixed ip address, for example, 192.168.20.1 and connected ...
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67
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Reading Durations of signal train
I am receiving a signal train of alternate high low pulses and trying to read it on Raspberry Pi Zero W. I have enabled the one wire pin(GPIO-4) and used that pin to read the pulses.
I am reading the ...
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2
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70
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Why does this GPIO button click run twice if I remove the print statement?
I run this script when the Raspberry Pi boots. When a key is pressed (GPIO 19) the interrupt function gets called.
If I remove the print("BUTTON PRESSED") statement on line 10, the interrupt ...
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Desktop Weather Display using Pi-pico-w
I'm trying to replicate this (https://mustardcorner.com/desktop-weather) project but I'm trying to use the Pico w instead of the Pizero w he was using.
But the code obviously does not work on the Pico,...
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I am trying to print "Hello World" 15 times from my Raspberry Pi Pico to a text file on my windows desktop via serial communication
Here is my code:
Main.py (PICO code)
import time
for i in range(15):
print("Hello World")
time.sleep(1)
Windows Desktop Python Code
import serial
port = "COM5"
ser = ...
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1
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119
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How can I monitoring permanently a sepeaker device and always it plays i measure the sound decibels peaks using python
I found this code below and apparently it could solve my problem but how can I modify to observe the speaker device rather than mic? And also appears to me that audioop lib is deprecated in pynthon 3....
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1
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73
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Multiprocessing to speed up data acquisition for I2C devices
Here's my situation: I have four FDC1004 devices that I want to have connected to an array of 64 electrodes through four ADG1206 16:1 multiplexers. Each device is slaved to a pi4 using separate I2C ...
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0
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31
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IR Remote POWER event when using EVDEV library
I have a python script that handles IR remote events using the EVDEV library.
The problem I have is that the when debugging the KEY_POWER event code, it completely powers down the PI.
Ideally, I want ...
- 101
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46
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Audio popping/crackling when playing via Python - Raspberry Pi 4
Currently I have a pair of speakers connected to my Raspberry Pi 4 via the 3.5mm jack. The speakers are powered by USB, but I'm using a wall adapter to power them rather than using the Pi to power ...
0
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1
answer
63
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Open CV threading to get frames
I am working on a project for which I need run 3 threads in python. 1 for getting frames and the other 2 for proccessing them. I don't know how to pass variables between threads (I want to pass frames ...
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DS18B20 not detected on Raspberry Pi [duplicate]
In ls /sys/bus/w1/devices/ I only have w1_bus_master1
I have added w1-gpio and w1-therm in /etc/modules
I have also added dtoverlay=w1-gpio in /boot/config.txt
I am not sure what is wrong. The RP 4 ...
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1
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did I fry Raspi I2C pins?
So I wanted to test a sensor I have on the pi, the sensor has on-board level switchers supports both 5V and 3.3V with a 10k pull-up resistor for both SCL/SDA, Mistakenly I wired the Vin into the 5V ...
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How can I make some videos in the GUI that was designed using qt5 run in a loop?
I have some videos in a GUI that plays when certain conditions are met. The problem I have is that I am unable to make the videos start again after they end. Here is the code for the UI:
import os
...
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1
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How can I run at boot or autostart an app with GUI?
I have a python script with a GUI that was designed with qt5, the script runs fine whenever I run it through the terminal or Thonny IDE. But no matter how much I tried, after trying many guides, ...
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1
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101
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Where does the normal terminal output go to when a script is started by init.d?
I've a Python script which runs OK manually. I've started it on boot init.d. It runs, but exits. Can you tell me where the normal terminal output goes in this case? There's debug output I've sent to ...
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1
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Using init.d to Start Script Driving Hardware PWM
I'm using init.d to start a Python script on boot. The script employs hardware PWM.
When I run the Python manually as the pi user, it works fine.
When I start the script manually, calling the daemon ...
- 698
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90
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How would I connect and control this linear actuator to my raspberry pi 4 b+
So I have 2 questions for you guys, girls, or whatever you may be, this is the actuator I am planing on buying:
https://www.robotshop.com/products/kitronik-linear-actuator-micro-servo-kit?...
1
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2
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320
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How to set Hardware PWM Pins
I need a fairly deterministic PWM duty cycle. I don't believe it's rocket science to use hardware PWM.
Numerous sources tell us that we can modify /boot/config.txt by adding
dtoverlay=pwm-2chan
which ...
- 698
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0
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69
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photogrammetry solutions for raspberry pi 4
Question:
What open source and automatable software solutions for photogrammetry with Raspberry Pi 4 are available? What are their features, strengths, and weaknesses?
I am not averse to using ...
- 101
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0
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52
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Raspberry Pi Pico accurate sunrise time
Is there a way to access or calculate sunrise and sunset times according to latitude and longitude with a raspberry pi pico ? I can do it with my raspberry pi 3b+ and astral but astral doesnt seem to ...
- 11
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0
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35
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How to modify Pi Camera sensor size?
I have an Arducam 5MP autofocus camera (OV5647), which I believe is almost identical to the Pi Camera V1, but with a motorized lens for focusing.
https://www.arducam.com/product/raspberry-pi-camera-...
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