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.
863
questions with no upvoted or accepted answers
5
votes
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answer
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Problem sending analog read values over serial
Ok I apologize as I have edited this quite a bit, but I have narrowed down the problem a bit more. For some reason I can't transfer values from my arduino analog pins??
I am trying to send values ...
- 193
4
votes
1
answer
7k
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Alsa lib error pyaudio on raspberry pi 3
I'm getting these ALSA lib errors when trying to use pyaudio.
I know my mic works as I can live stream audio through gstreamer.
Can anybody explain to me why i'm getting these issues:
ALSA lib ...
- 41
4
votes
0
answers
795
views
RPI 3B and Tiny Thermal Printer - Unable to use python library
I'm having trouble hooking up my Raspberry Pi 3 Model B to my Adafruit Tiny Thermal Printer (nb: not the mini thermal printer - this is the one with a mini-USB port built in).
I've got it connected ...
- 41
4
votes
0
answers
457
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Speech Recognition ERROR
I am using a speech recognition library on a Raspberry Pi in Python that I found here and I installed it through pip. I also had to install Pyaudio of their site here. Pip would not work for Pyaudio ...
3
votes
0
answers
189
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ADXL345. Bits, resolution and g's
I have a Kistler type 8921 which produces 1g (10m/s2) RMS (at 159 Hz). The ADXL345/Raspberry Pi 3 setup should produce similar g's, but currently doesn't.
As can be seen, it is not just about a ...
- 133
3
votes
1
answer
2k
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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 ...
- 31
3
votes
1
answer
419
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How to make sense of this Raspberry Pi project guide for building a theremin?
I have just started out using a Raspberry Pi, and for my first project, I wanted to build a pseudo theremin using an ultrasonic motion detector and other electronic components (requirements are laid ...
- 139
3
votes
1
answer
711
views
Is it possible to connect a Minecraft Pi Edition Python script to a specific active game window?
Is it possible to connect a Minecraft Python script to a specific active game window when multiple game windows are currently open?
For example, I have three different open games on one Raspberry Pi ...
- 171
3
votes
0
answers
799
views
Raspbian Reboot Hangs
Having a bit of a problem on Raspbian Jesse. I have 2 switches which I use to shut down and restart my raspberry pi. Python does an os.system ("sudo reboot") and os.system("sudo shutdown -h now") on ...
- 173
3
votes
0
answers
807
views
RPi.GPIO autocompletion
Is there any way to have auto-completion when working with the RPi.GPIO in Python? I don't see it having any Python sources that could be used for it.
I'm using IntelliJ IDEA, which uses PyCharm's ...
- 187
3
votes
0
answers
2k
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Raspberry Pi 3 Bluetooth Baud rate
How do I increase the available baud rate of the bluetooth module for the Raspberry P1 3 model B?
I have tried editing the /boot/config.txt file with:
init_uart_baud=1000000
init_uart_clock=16000000
...
- 31
3
votes
0
answers
2k
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Emulate a Bluetooth Keyboard with a Raspberry Pi 3
Raspberry Pi 2 Model B (Raspbian Wheezy and bluez 4.99)
Executes perfectly using a Bluetooth dongle.
Raspberry Pi 3 Model B (Raspbian Jessie and bluez 4.99)
Attempting to pair with Windows laptop ...
3
votes
0
answers
4k
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Jack server not working on Raspbian
I wrote a little python app (using PyDub), that plays sound files.
Everytime I run it, I get the these errors:
ALSA lib pulse.c:243(pulse_connect) PulseAudio: Unable to connect: Connection refused
...
- 31
3
votes
0
answers
707
views
Running two cameras at the same time (Pi Camera & USB camera)
I would like for my project to have one camera (PiCamera) Streaming video.
And another USB Camera (PS3 Camera) taking pictures when I execute this function:
def grabPicture(self):
grab_cam = ...
- 133
3
votes
0
answers
1k
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OpenCV. Can't open video from usb camera on the screen
When I'm trying to start simple code, the frame opens and don't respond.
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
while(True):
ret, frame = cap.read()
cv2.imshow('AIR',frame)
...
3
votes
0
answers
290
views
Slice of Radio and Ithobox
I've got a Raspberry Pi with Ciseco Slice of Radio and I'd like to control my Ithobox LINK
It has an 868 Mhz RF transmitter/receiver and I also have the optional RF remote control unit which I'll be ...
- 31
2
votes
2
answers
98
views
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 ...
- 21
2
votes
0
answers
1k
views
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 ...
- 21
2
votes
0
answers
197
views
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
votes
0
answers
219
views
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
2
votes
0
answers
35
views
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 ...
- 21
2
votes
0
answers
65
views
HQ camera hanging after gpu_mem is increased
I just recently got a Raspberry Pi HQ camera and wanted to operate it using a python script.
I initially tried to take full resolution pictures using the default gpu_mem=128, but the program crashed ...
- 131
2
votes
2
answers
306
views
How to send data to a Pervasive eink display via Python?
I got a 5.8" eink display from Pervasive Displays and cannot get it to work, I feel that only a little bit is missing. After a lot of struggle I managed to run it via their sample C code, but the ...
- 73
2
votes
1
answer
145
views
Inconsistent error using HQ camera
I have been having some issues using the HQ pi camera. I am running Rasbian 11, latest apt update 11 march 2022. I use libcamera-still to take images and I call this command using python subprocess....
- 41
2
votes
0
answers
301
views
High-speed USB Audio Streaming
I am using a Raspberry Pi 3B+ as the USB host for an embedded device that I have configured to appear as a USB Audio 2.0 compliant microphone.
I am currently using PyAudio for opening and recording ...
- 46
2
votes
1
answer
809
views
How do I use NumPy and Pandas in my virtual environment?
I'm using Raspberry 4 to host a web service with FastAPI. In my code, there's a dependency on Pandas. When I ran the web service, it gives me the error message below:
File "/home/pi/Projects/...
2
votes
0
answers
2k
views
How to make sure BlueZ NoInputNoOutput agent does not ask for user authorization?
I am trying to pair my custom made BLE device with a Raspberry Pi 4, using the bluepy library, programmatically. I do not want to press "accept" or type "yes" whenever I try to ...
- 21
2
votes
1
answer
47
views
Bluetooth Ignition need help smoothing out functionality
I have been working on a Bluetooth authorized push to start the ignition in my truck. Right now it's installed and working but I would like to change the function of the button and shorten the time it ...
- 21
2
votes
0
answers
237
views
pi zero portable mp3 player software
i am thinking about a project for which i could use some guidance.
i want to build a flac/ high bitrate mp3 player with nice clicky buttons and rotary encoders.
i have a raspberry pi zero, a dac hat ...
- 21
2
votes
0
answers
471
views
pySerial - UART - Determining when a message has actually been sent (callbacks?) (RTS/CTS hacking?)
For reasons (explained at the end of the post) I need to have a pin change state immediately as the UART finishes outputting a set of bytes.
I'm using pyserial & pigpiod on a RPi3B+ and bluetooth ...
- 21
2
votes
0
answers
161
views
Input() called from GPIO input (button press) returns error
I'm learning Python whilst tinkering with various 'kits' I got for my Raspberry Pi. Currently messing around with the RFID-RC522, a simple to use RFID read/write board.
I have independent Write.py ...
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2
votes
1
answer
293
views
Remote Debugging Raspberry Pi 0W
Using Visual Studio to debug python applications on a Raspberry Pi 2 or newer is a real convenience, but Visual Studio Code does not support debugging on Raspberry Pi 0 or 0 W because of the older CPU....
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2
votes
0
answers
947
views
Getting "has no 'x' member errors" for Rpi.GPIO using vscode remote ssh extension
I just set up my raspberry pi and have been using vscode (remote - ssh extension) on my windows computer to code on there but I have been getting errors like "Module 'RPi.GPIO' has no 'output' ...
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2
votes
2
answers
529
views
I cannot install opencv
I just bought a new camera for my pi so I installed it and then I wanted to test it out so I got a simple python program to test it:
import cv2 as cv
def testDevice(source):
cap = cv.VideoCapture(...
- 21
2
votes
0
answers
642
views
adafruit_drv2605 AttributeError: object has no attribute 'try_lock'
I am using a Texas Instruments DRV2605 to drive some haptic motors. I am using the Adafruit library here to communicate with the DRV through Python. I need to set some bit registers of the chip but ...
- 115
2
votes
1
answer
704
views
Create Overlays with DispmanX in Python
How can i create preferably dynamic overlays using Dispmanx in Python on a Raspberry Pi (3B)?
My goal is to overlay custom images containing current information on top of a Picamera Preview. The ...
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2
votes
1
answer
2k
views
How to display an image full screen on my second monitor (raspberry pi 4)
I am using RPi 4 and running two monitors.
I want to display an image on the second screen using Python or Linux command line. I have tried but I couldn't do this with fbi(it displays on the both).
2
votes
0
answers
706
views
How to add 2 RFID readers to Raspberry PI 4
I managed to install 1 rfid reader following this link tutorial but i have no idea how to read with 2 and know from which one reads
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2
votes
0
answers
431
views
Raspberry Pi stops running cron job after a few hours
My raspberry pi 4 is set to run a python script every hour that turns on some philips hue lights and takes a picture with the camera module. It worked perfectly for 26 days, then it stopped running. ...
- 21
2
votes
0
answers
223
views
Sending an image from Pi Camera continuously to a display
I want to send 6 images per minute from the Pi Camera continuously to any display. Like for say I have the camera that is at my house but I want to send the images to my work computer.
The end goal ...
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2
votes
0
answers
81
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Raspberry Pi Jsch Diconnect Handler
I am using Android Studio "Jsch" package to connect my Android Device to my Raspberry Pi via SSH. The Event "on press" sends a command,which executes a Python file on my Raspberry Pi. This File turns ...
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2
votes
0
answers
47
views
Error opening InputStream USB Microphone and Raspberry PI3B+
I am trying to use a USB microphone with python sound device and raspberry pi3B+. When I execute the script in the console typing $ python3 sound.py it runs and records all ok. But when I try to ...
- 21
2
votes
0
answers
236
views
Using Motion to Post Photos Captured to API
I am attempting to build a program that will automatically post the photos taken by motion from my usb webcam to a rest API, and have ran into some problems. My livestream works correctly, and it ...
- 21
2
votes
0
answers
1k
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picamera: capture a frame while continuous capture in background
I'm capturing a timelapse with the picamera module for python:
def capture_thread_task(self):
filename = os.path.join(self.SAVEPATH, self.safe_camname + '_{timestamp:%Y%m%d-%H%M%S}-{counter:03d}'...
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2
votes
0
answers
4k
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Updating python version3.6 to python 3.8.1
currently, my raspberry pi runs python versions 2.7 and 3.6 [by default] and version 3.8.1 [I'm trying to update the current version]
This causes a lot of trouble when I try to install a new package ...
2
votes
0
answers
44
views
Permanent Arduino usb address on RPi!
So my project is using to Arduinos slaves to RPI that is master. They communicate through USB.
Each time I remove one of the Arduinos I need to modify the .Py script to add the new USB alocated.
Is ...
- 131
2
votes
1
answer
279
views
Timed trigger for GPIO input
I'm running a raspberry pi system that records fish as they swim passed an IR break beam sensor at a fish ladder. So far the system works well but I'm trying to cut down some of the false triggers. ...
- 41
2
votes
0
answers
131
views
PWM on pump not working as expected
I am attempting to run a PWM on a pump using rpi.GPIO using the following code:
def run_PWM_on_pump():
gpio.setmode(gpio.BOARD)
gpio.setup(8, gpio.OUT)
p = gpio.PWM(8, 0.5) #also works at ...
- 97
2
votes
0
answers
205
views
Adafruit OLED (128x64) display very dimmed?
I bought the Adafruit 128x64 OLED Bonnet and tested it with the demo program. Unfortunately the luminosity is very low and it is not satisfying:
I have tried to adjust the contrast from 0 to 255 but ...
- 219
2
votes
0
answers
224
views
Safe cut power supply from raspberry
I want to cut safe the power supply from the raspberry with a relay
connected to the gpio.
I know how to connect to relay to the board but..
When the relay turn off the power line will be cut off to ...