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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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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1
answer
51
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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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84
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Raspberry Pi HQ Camera: Capture NEF or DNG?
I'm making a raw capture tool for raspberry pi and the official HQ camera. I can't seem to get RAW DNG or TIFF images, whatever I do. Here's my current code:
from picamera import PiCamera
print('...
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Problem Using Python CAN with Pi Can 2 Hat
I hope to find some answers here regarding a program of mine that doesnt seem to work! It is a modified version from https://rb.gy/blrhk . I am using the RPi in conjunction with an arduno uno with a ...
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Audio output not working with cli
I am using Raspberry pi OS with raspberry pi 4. I have an application which uses playsound with python to play an audio file created by gTTS library. I am using a usb sound card card 2 which has a ...
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45
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How can I keep a VNC session running when not connected to it?
I'm running a scraping bot with selenium, and to get results as stable as possible I'm running a chrome instance from a VNC desktop and then attaching selenium to it ; it's not headless and allows me ...
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54
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web page show GPIO pin status (on or off) automatically
How do I read a raspberry pi GPIO pin value and say show a red or green button on a web page reflecting the pin's current status, and have this automatically update when the GPIO pin's state changes?
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errors trying to import numpy on rasperry Pi 4 B
I am using the most recent version of Rasperry Pi's OS on a Pi 4 model B. Apparently the version of python that comes with the OS is 3.9. I'm not sure if Numpy comes with it or that I installed it ...
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205
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Selenium on raspberry pi zero 2w
I've been trying to run selenium webdriver on raspberry OS.
Basically what I did:
pip3 install selenium
sudo apk-get install chromium-chromedriver
And run this script:
from selenium import webdriver
...
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30
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Unable To Make MicroServo99 SG90 spin with raspberry pi
I am having an issue with my raspberry pi and making it spin a motor with python. I am currently using a battery connected to a PCA9685 16-Channel 12-bit PWM driver which connects my motor on channel ...
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Tkinter based UI in yocto has only one font size
I have a python 3 app with a TKInter interface. Very simple UI, there are 4 frames each with a headline (big text) and a status (small text). It works well on my Ubuntu 22.04 desktop.
fr = Frame(root, ...
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114
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can't send spi message: Invalid argument
I'm using the SPI library SPI-Py with MFRC522 RFID Library. I'm getting this error when I run REad.py. This issue is related to the SPI-Py library
can't send spi message: Invalid argument
I have ...
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77
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Need help with Raspberry Pi camera - mmal error
Hello Raspberry Pi community,
I'm reaching out for assistance with a recurring error related to the Raspberry Pi camera module.
so it showing this error:
###############################################...
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104
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Stepper motor control with RPi 3B+
I want to control 2 stepper motors with RPI.
I wrote a loop with HIGH, LOW and delay.
When I increase the speed the waveform changes and the driver(Rtelligent R86) stops the motor (NEMA 34).
The ...
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91
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i2c LCD Backlight
I have an LCD display that has a backlight (since when I plug it in it lights up). However, using the code below I cant get it to turn on. Any help would be greatly appreciated
import smbus
import ...
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How do I run a python script that polls for user input on boot?
I'm reasonably familiar with software, and wanted to help my friend with their cosplay project, which was using this RGB matrix and toggling between different images using this mini three-key keyboard....
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Can't play song on startup using Python and rc.local
I have a python app called main.py, that runs upon startup using rc.local.
During this app's runtime, it runs an external bash script 'play.sh' that runs vlc to play a song.
The code in the 'play.sh' ...
- 31
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1
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120
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How to program remotely on horribly slow Pi-2
I have an old RPi 2 B which I've loaded the latest version of Raspberry Pi OS Lite onto. I'd like to use it to make an IoT device using an TFT LCD screen to show information like the weather and my ...
- 113
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103
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Receiving push messages sent through my phone (Android) to my Raspberry Pi via Pushbullet [closed]
I am already using the Pushbullet API via python running on my Raspberry Pi 3 B+ to send push notifications upon certain events, that I receive on my Android phone. I would like to also send back ...
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781
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VideoPlayer using python, tkinter and pythong-vlc
I have created a video (with audio) player using vlc on Raspberry pi 4 board. Code and other details below. I have an HDMI screen attached on HDMI-1.
I am hiding the desktop using this approach.
This ...
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450
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Raspberry Pi Camera: Picamera2: Cannot configure camera in the middle of a stream
I'm making a remote config PiCamera for astrophotography, using the official Camera Module 3. When the user configures the camera, my application sends a request in JSON format over an HTTP socket. ...
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53
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Trouble capturing images from a Raspberry Pi camera using Python
I am having trouble capturing images from a Raspberry Pi camera using Python. The following code works fine the first time, but fails to read data from the camera on subsequent attempts:
# shotFoto.py
...
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70
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How to generate proper pulse with python (with RPi.GPIO or pigpio) and GPIO pins to count with 4026 IC?
How to generate proper pulse with python (with RPi.GPIO or pigpio) and GPIO pins to count with 4026 IC? At this question it seems it is solved, but it isn't clear how:
How can I control a 4026 counter ...
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35
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Why is my Raspberry Pi booting an infinite number of times when I turn it on?
I recently got a Raspberry Pi 4 Model B board in 2022, and I did not use my Raspberry much. When I put the OS in the Raspberry, it works. But When I tried using it now with a new OS and a new sd card. ...
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67
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Relay light on but not providing power
Hi I am trying to create an automated watering system using a submersible pump, raspberry pi 4 and 2 channel relay.
The setup I had before worked until I added a usbc power supply(5v) and after that ...
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1
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50
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How to PID Control a 47 Ohms, 8W resistor with a Raspberry Pi and Python?
I got a Raspberry Pi 4B, a 12V power supply, a 12V air pump controlled by a MOSFET, a ds18b20 for feedback and a 47 Ohms, 8W resistor that we should somehow heat. Everything up to actually heating the ...
- 111
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What sort of order of magnitude in time does it take from code like GPIO.output(led_pin, GPIO.LOW) to be executed to led being lighted up?
So I am lighting up an through hole led using 5V and an GPIO pin. I have code in python and I’m trying to get a precise timestamp of when the LED lights up with something like this:
GPIO.output(...
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130
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How to detect the position and rotation of objects in Python?
I'm building a robot that needs to detect the position and rotation of multiple trained objects from a single image. For this I'm using my Raspberry Pi 3B with Raspberry OS 64-Bit.
I tried Localizer ...
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413
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Python code cannot detect my i2c address
I would like to ask some opinions regarding i2c communications with pca9685. My i2c1(SDA=GPIO2, SCL=GPIO3) of my rpi 4b is used by my mpu6050, which I had to enable one more i2c channel of my ...
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647
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Raspberry pi camera module 3 works only on libcamera
I recently bought a Raspberry Pi 3b+ and Camera module v3. After days of troubleshooting, I got the camera to spit out images on the libcamera CLI. But, I can't create a picamera.PiCamera object in ...
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Can't retrieve PySerial ListPortInfo.vid, ListPortInfo.pid, ListPortInfo.description
I am developing a cross platform Python application which will need to work on Windows and Raspberry Pi. I am using 64bit Raspberry Pi OS on a Raspberry Pi 4.
On Windows I have no problem getting via ...
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2
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2k
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Using micropython on Raspberry Pi Zero W
I have found a library and sample code that seems to work very well on the Pico W, but I need a bit more power, so I'd like to use the same library on the Pi Zero W instead. Initially, I tried using ...
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3
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301
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Checking angle of servo motor with a Raspberry Pi 3B+
I was trying to check the angle of a servo motor using my Raspberry Pi 3B+. Although when i run the code the servo motor jumps to 90 degrees (physically) and returns an angle of 0.0 in the terminal. ...
- 11
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231
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Picamera2.stop() Behavior - do controls persist?
With Pycamera2 you can set controls e.g. autofocus. There doesn't seem to be a get_controls() function to verify what is set. Do the controls perist after using Picamera2.stop()?
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Pi camera video stream to a PC (not through a web page) which has low latence
I need to send a video stream from my pi camera on a Raspberry pi to a computer on the same network. The video transmission should preferably have a low latency and a good image resolution. After the ...
2
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2
answers
95
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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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184
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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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1
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602
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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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SIGINT in python using button
I am struggling with my work on how could I power on/off the script with only using the button only. I was planning to use only button for my work, I had researched and so far all of it doesn't work ...
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Coin sorter Coding
Hello I'm a college student and we have a project in our class and I was assigned into making a coin sorter, the hard part is we didn't have knowledge about programming rpi and some codes are new to ...
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Postgres ERROR: SSL SYSCALL error: Connection timed out
I wanted to develop an app with Python that would run on a Raspberry and be remote controlled. This app should control (switch on and off) 2 leds based on the current day, time and the user's ...
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How can I reduce the memory usage of my python3 scripts on a Raspberry Pi Zero 2? [closed]
I created 9 python scripts that I run as cron jobs.
When I run them on a VirtualBox virtual machine running Ubuntu Server 20.04 with 512MB of RAM with a single processor, everything runs smoothly and ...
2
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2
answers
69
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Unable to start python file with http framework on crontab
This is my very first question, so forgive me if I am not correctly following the forum rules ;;))
I am looking to automate a python script for a webpage using GPIO pins that I can remotely enable ...
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90
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Screen recording a specific window with audio
Raspberry Pi / Python. I need to be able to capture a specific tkinter window with audio, if the specified window is not possible then a predefined area of the screen is.
We are currently using ...
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1
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283
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Threading using Python in Raspberry Pi for GPIO inputs
My self-working on encoders of differential drive robot, I need to read the speed and position of wheels using two encoders simultaneously. I have used the threading library in Python even though I ...
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254
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Matplotlib error on Raspberry
On my Rapberry Pi Model3 is installed by default python 3.9.2
I've correctly installed :
matplotlib 3.6.3
numpy 1.24.1
If I create a simple .py file like this:
import matplotlib.pyplot as plt
import ...
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0
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57
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Raspberry pi capturing rs232 data and outputting through pushover
I'm wondering if anyone would be able to help me? I can see loads of tutorials on using Python to capture data from RS-232 but I can't figure out how I would be able to use that data to send ...
- 11
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1
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2k
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Raspberry Pi Python Picamera2 Motion Detection Camera Frame Rate
I am trying to write my own motion detection camera Python program for my Raspberry Pi for recording video when motion is detected. I have the following code using Python Picamera2:
#!/usr/bin/python3
...
- 9
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0
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20
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Monitor lightbox project – does this exist yet?
I have a second monitor next to my iMac. What I’d like to do is set up a Pi that simply outputs solid colour to the monitor over HDMI or composite (it has both), thus allowing me to use it as a video ...
2
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0
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195
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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
...
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