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.

823 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
6 votes
1 answer
1k views

Rasberry Pi zero and 3 bluetooth transfer speed is slow RFCOMM

I am trying to send a series of bytes from the Raspberry Pi zero W to the Raspberry pi 3 via bluetooth. Im using the PyBluez python package. I believe that Raspberry Pi Zero has Bluetooth 4.1 and ...
user avatar
  • 93
4 votes
0 answers
746 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 ...
user avatar
4 votes
0 answers
426 views

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 ...
user avatar
3 votes
1 answer
198 views

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 ...
user avatar
  • 173
3 votes
0 answers
166 views

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 ...
user avatar
3 votes
1 answer
7k views

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 ...
user avatar
  • 31
3 votes
1 answer
2k views

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 ...
user avatar
  • 31
3 votes
1 answer
380 views

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 ...
user avatar
3 votes
1 answer
628 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 ...
user avatar
  • 171
3 votes
0 answers
724 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 ...
user avatar
3 votes
0 answers
727 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 ...
user avatar
3 votes
0 answers
2k views

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 ...
user avatar
  • 31
3 votes
0 answers
2k views

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 ...
user avatar
3 votes
0 answers
3k views

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 ...
user avatar
  • 31
3 votes
0 answers
673 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 = ...
user avatar
  • 133
3 votes
0 answers
1k views

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) ...
user avatar
3 votes
0 answers
287 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 ...
user avatar
2 votes
1 answer
716 views

Fullscreen GUI App on Raspbian startup

i'm working on a Simple DIY Home Control project Language is Python, and GUI is PyQT5 The project is just some ESPs connected to a main Raspberry Pi (3B+) controller The problem is that I'm trying to ...
user avatar
2 votes
0 answers
154 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 ...
user avatar
2 votes
0 answers
867 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 ...
user avatar
2 votes
0 answers
209 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 ...
user avatar
  • 21
2 votes
0 answers
737 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' ...
user avatar
  • 21
2 votes
0 answers
333 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. ...
user avatar
  • 21
2 votes
0 answers
120 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 ...
user avatar
2 votes
0 answers
75 views

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 ...
user avatar
2 votes
0 answers
32 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 ...
user avatar
  • 21
2 votes
0 answers
152 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 ...
user avatar
2 votes
0 answers
782 views

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}'...
user avatar
  • 103
2 votes
0 answers
4k views

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 ...
user avatar
2 votes
0 answers
41 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 ...
user avatar
  • 131
2 votes
0 answers
99 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 ...
user avatar
2 votes
0 answers
107 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 ...
user avatar
  • 219
2 votes
0 answers
200 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 ...
user avatar
2 votes
0 answers
127 views

PICamera white balance difference between preview and capture

Below is a screen shot of the preview and the captured image of the same scene taken from a single PICamera at the same time. As you can see the one on the left (the capture) is noticeably bluer than ...
user avatar
2 votes
0 answers
79 views

efficiency of python sleep function to set a raspi pin HIGH and pause the script

I am continuously measuring some parameters using Raspberry Pi. I am using Python. When the measured value is higher than a particular value, I want to set a GPIO pin high (for some LED indicator) and ...
user avatar
  • 129
2 votes
1 answer
452 views

Control on-board led triggers from python

I know the trigger for on-board leds can be controlled from the command-line (or a script) I have a python program that I want to temporarily take over the system led blink it a little and return ...
user avatar
  • 121
2 votes
0 answers
978 views

Threading on Raspberry pi Serial Port

I have multiple Raspberry Pi(RPis) using which I have to send data (wireless,using Long Range modules connected to TX RX of RPi) on just one Rpi. All the RPis(Ones sending data) use different ...
user avatar
2 votes
0 answers
372 views

Detecting “No Mouse Movement” in python on Raspberry Pi

So this is going to be a bit confusing but using a basic loop i can detect keyboard and mouse inputs using the following: globals()['keyboardEvent'] = evdev.InputDevice('/dev/input/event0') globals()...
user avatar
2 votes
0 answers
326 views

Need help with Controlling WS2812B LEDS

I have made a 5 x 5 WS2812B RGB LED matrix to work with my raspberry pi. I'm trying to figure out how to run several tests from this tutorial: https://tutorials-raspberrypi.com/connect-control-...
user avatar
2 votes
0 answers
1k views

Send alert message to telegram from Raspberry Pi

I am currently working with an IR sensor for paper shelves. When the sensor detects no paper, it will turn the LED light on. at the same time, it will send an alert message through Telegram for the ...
user avatar
2 votes
0 answers
928 views

Pi Camera choppy video/skipped frames

I'm using the Pi camera to record 30 seconds of footage, triggered by an IR break beam sensor. This is running on a Pi 3 B+. I've soldered in all the wiring using an Adafruit Perma-Proto Pi Hat. My ...
user avatar
2 votes
3 answers
2k views

Connecting multiple load cells Pi Zero W to read individual values

I have a project in mind where I want to measure the weight and position of an item on a shelf. The idea was to mount the shelf on a load cell in each end and then get the weight and ratio between ...
user avatar
2 votes
0 answers
1k views

Permission Denied as root when connecting BluetoothSocket with Bluez 5.43

I've been trying to get bluetooth working on my Raspberry Pi 1 Model B+ running Raspbian Stretch Lite 4.14 with a 3rd party USB bluetooth dongle. I installed Bluez 5.43 for python 2.7, and was able ...
user avatar
2 votes
1 answer
82 views

fork() Process Issue on Channel Switching via Rotary Encoder

I have KY040 rotary switcher(encoder) as shown below picture. It is the scenario that there are 5 radio stations(simple html url) in urls.txt which are read into stations list in radyoCS.py, at every ...
user avatar
  • 141
2 votes
0 answers
1k views

Illegal instruction when running python on raspberry pi

I was doing a pi project where pi communicates with a UHF ID card reader via hardware serial and read cards. Pi gets the card information through serial and upload them to a remote database. Also some ...
user avatar
2 votes
0 answers
5k views

How do I test if my UART port is working? Simple example... loopback-test

I am working on a NMEA(GPS)-datalogger for a drone. I followed the tutorial from fishandwhistle and createt this script: #!/usr/bin/python3 import os, time, sys, glob, datetime, syslog, pynmea2, ...
user avatar
2 votes
0 answers
2k views

RPi camera stream to OpenCV in Python

I have been searching everywhere and tested what seems to be everything in order to get OpenCV in python to accept a video stream through gst-launch-1.0 from a RPi camera connected to a RPi. So far, I ...
user avatar
  • 21
2 votes
1 answer
807 views

USB audio from Pygame

I am running Raspbian Stretch. I've connected a USB sound device and selected it through the graphic interface. This sends the sound out fine from youtube in Chrome but is silent with a Python ...
user avatar
  • 21
2 votes
0 answers
2k views

Segmentation fault, running out of memory? PyQt5

I am programming code to display camera feed with my raspberry pi 3 and Raspbian. Strangely, sometimes the code shows the video and sometimes i get the Segmentation fault error. I used gdb to find ...
user avatar
2 votes
0 answers
1k views

High speed photography using RPi Camera module

I'm trying to capture high speed water flow movement in a small dark chamber with a cool white 5 W high power LED as a flasher. My target is to achieve quick exposure using 0.8 millisecond light pulse....
user avatar
  • 121

1
2 3 4 5
17