Questions tagged [python-3]
Use this tag when referring to the Python 3 language. This can include discussions about specific features unique to the language or perhaps when referring to software that requires Python 3 in order to function. Note that general programming questions are often better suited to Stack Overflow; use this tag only where directly relevant to the Pi.
581
questions
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16
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Send data from FPGA to Raspberry Pi 4 B using USB and implement GUI in RPi to plot the data [closed]
I am new to Raspberry Pi as well as FPGA
I have some data coming from ADC to be loaded into SDRAM of FPGA and then that data is to be send to Raspberry Pi 4 B over USB for plotting in the GUI created ...
0
votes
1
answer
17
views
Python requests is too slow with certain WI-FI connection
I'm working on a TTS app using AWS Polly in Raspberry PI 3 B+ and when I post a text using Python requests it take a long time receive the response, around 16-17 seconds. This happens only with a ...
- 111
1
vote
0
answers
25
views
Tkinter GUI not starting on boot with ROS
I'm trying to launch a tkinter GUI I made that is used to read GPIO pins as well as some ROS topics. I'm using Buster 10 and ROS Melodic with Python 3.7. I am using Clearpath's robot_upstart package ...
- 11
1
vote
1
answer
48
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2 motors on L298N controlled with GPIO from Rpi3B .. python telling me channel already in use and motors not turning
I have adopted Electronics hub tutorial to run 2 motors from a L298N controlled by Rpi3B using GPIO.
Why is my version of the code not working?
I do understand that I could ignore the "channel ...
- 13
0
votes
0
answers
19
views
LoRa HAT communication module don't send anything
I'm working now an long range communication system, and I need help. I can't use GSM, WIFI, etc. I test one LoRa Raspberry pi shield, and I bought this: link, and I have followed this tutorial. Ofc I ...
- 1
2
votes
1
answer
32
views
Raspberry Pi 4 Python not finding installed libraries
I trying to connect an OpenCV OAK-D to an R Pi 4B.
I've downloaded & installed all the requirements & installed the depthai library using pip
To check its there,
pip3 list | grep depthai
...
- 147
1
vote
1
answer
50
views
How to get measured(analog/digital) output from 801s vibration sensor? [closed]
I have Rpi3B+, 801s vibration sensor and a ADC. I need the analog output to plot a graph for analysis. Basically I need to observe how vibration is affecting the other properties of the machine. ...
0
votes
2
answers
45
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How to programically detect if display is plugged in to GPIO
I've attached an ePaper display to a GPIO bonnet/HAT and have set up cronjobs to run scripts that print data onto ePaper display.
If I remove the HAT and display, then how to check if it's plugged in?
...
- 11
1
vote
1
answer
189
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(raspberrypi) ImportError: Unable to import required dependencies: numpy
I use raspberrypi 4 ; 32 bit, linux run python
error occur:
ImportError: Unable to import required dependencies: numpy
Original error was: libcblas.so.3: cannot open shared object file: No
such file ...
- 133
1
vote
0
answers
56
views
(Raspberry Pi 4 and Python) Raspberry Camera mode raise picamera.exc.PiCameraMMALError and picamera.exc.PiCameraError
System: Raspberry Pi 4 model B, use external USB Logitech camera
I'm follow the youtube tutorial but get picamera.exc.PiCameraMMALError andpicamera.exc.PiCameraError
Relate discussion on other site ...
- 133
1
vote
1
answer
499
views
Trouble using Tensorflow: SyntaxError
I'm trying to use the LSTM neural network found here on my Raspberry Pi 4 Model B
https://machinelearningmastery.com/text-generation-lstm-recurrent-neural-networks-python-keras/
I have trouble running ...
- 23
1
vote
1
answer
42
views
How to give Ownership to Pi from root to Mount_Folder
Here is my workflow and the issues I want to fix.
First I mount the windows shared folder on Raspberry Pi. But in order to use that, I have to mount using sudo.
sudo mount.cifs //<hostname or IP ...
- 51
1
vote
1
answer
58
views
Raspberry Pi spidev CLK working but no signal on MOSI
I have a Raspberry Pi Zero W that uses this LCD screen, including its touch interface using SPI0.
What I am trying to achieve is to add another SPI device that uses SPI0. I am able to successfully ...
- 113
0
votes
0
answers
67
views
Program stops running midway using OpenCv
Good evening. I wanted to track hand and body movements on my Raspberry Pi 2B (Debian 10 Buster), however, I keep getting this error in Thonny IDE:
Backend terminated or disconnected. Use 'Stop/...
- 1
1
vote
1
answer
68
views
Exposure time in PiCamera not working
I am trying to take a long exposure image (30 sec+) in python using a RPi HQ camera (https://raspberry.piaustralia.com.au/products/raspberry-pi-hq-camera and the PiCamera module).
This is my code:
...
- 11
0
votes
0
answers
30
views
raspistill taking long time to respond
I am trying to make a long exposure time lapse camera using a RPi HQ camera and RPi zero W, in python.
The code for my camera is (for a 30 sec exposure time):
import subprocess
filename = str(input(&...
- 11
0
votes
1
answer
99
views
'/dev/v4l-subdev1' node not created anymore for 16 MP Arducam with autofocus (IMX519 based) with Rpi 4B
/dev/v4l-subdev0 and /dev/v4l-subdev1 nodes used to be created before when booting up the Rpi with the ArduCam plugged in (via MIPI CSI-2 port). Now only /dev/v4l-subdev0 shows up, and I'm not sure ...
0
votes
1
answer
39
views
why GPIO does not work when executed from python shell but works from script
When I run this python script led.py it works.
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(24,GPIO.OUT)
print("LED on")
GPIO.output(24,GPIO....
- 355
0
votes
0
answers
114
views
Replace a KeyboardInterrupt with a button press to stop a continuous recording
I am trying to use the following code to act as the recording module for a wedding guest phone, I plan to run this script from one that will sense when the handset is lifted, play a message, and then ...
0
votes
1
answer
136
views
Record audio whilst pressing a button in scipy
I am trying to make wedding guest answer phone for my sister. The basic idea of these things is you pick up the handset, hear a message from the host, leave you own, replace the handset, and the ...
0
votes
0
answers
24
views
WorldTimeApi client_ip
I am trying to use World Time Api to get the ip address assigned by my ISP. In Micro Python on an RPi Pico W my_ip = json["client_ip"] returns an ipv4 address and in Python3 on a RPi 4B it ...
0
votes
0
answers
27
views
Activate or disactivate GPIO with another computer (with python)
I am doing a project and I tried to use my raspberry pi's gpio with another computer. I want that my computer send to the raspberry pi a signal with wifi (my raspberry pi is a local server) to ...
0
votes
1
answer
62
views
Raspberry pi 4 is not booting with Disk image that is working on Raspberry pi2
I am new to this project. The project was developed in 2015 using Raspberry pi2 and a 7' touch display. The disk image works perfectly on Raspberry pi 2. I tried to flash the disk image to an SD card ...
- 1
0
votes
0
answers
30
views
python3 Gtk & WebKit2 script taking too much CPU
I'm running Buster on a pi4 with 2GB of ram and a python3 script to load some web scripts and I noticed the CPU usage was 99%, I can't figure out why.
import gi
gi.require_version('Gtk', '3.0')
gi....
- 101
2
votes
0
answers
47
views
How can I get my python program that uses the requests library to run on boot via the crontab
I am working on creating a python script to retrieve data from a server using the requests library, and then display it on an adafruit led matrix using a raspberry pi. I have a program that functions ...
- 31
0
votes
0
answers
72
views
why i can't run use command python3 but it work on thonny python
it work here
but it get erro when i use commend. this erro that i get
192.168.247.109 - - [15/Jul/2022 19:46:59] "GET / HTTP/1.1" 200 -
OpenCV Error: Assertion failed (!empty()) in ...
- 1
0
votes
1
answer
123
views
I2C communication on Raspberry Pi 3B using smbus2
I'm trying to connect my energy measurement IC with Raspberry Pi 3B using the I2C protocol. I'm using sudo i2cdetect -y 1 to detect the connected devices and it is correctly showing the address(7-bits)...
1
vote
0
answers
99
views
Why can’t I print to this thermal printer on this python print server?
I'm trying to run a python based print server, based on these instructions, and this code.
I have the print server running on a Raspberry Pi Zero.
I assume the print server is working correctly, as ...
- 158
0
votes
0
answers
71
views
Raspberry Pi4- Dual HDMI -fbi
I am trying to display tkinter GUI on raspberry pi touch screen which is on hdmi0 and project the images using projector on hdmi1. But when I click the button to project image ie when I execute the ...
0
votes
0
answers
49
views
Python 2.7 and 3.x coexisting in harmony?
I'm on an RPi4 running the 64-bit version of Raspbian and want to have 2.7 and 3.x coexisting with NO problems. 3.x is part of the 64-bit Raspbian when installed. I just installed 2.7 (i.e., sudo apt ...
- 141
0
votes
0
answers
162
views
Problems with three USB cameras using OpenCV
I am currently working on a project with a Raspberry PI 3 b+. The idea is to film a surface with 3 USB cameras to locate objects. To test if my setup works, I wanted to stream their content to three ...
0
votes
0
answers
194
views
Help! GSM/GPRS/GNSS HAT - SIM 868
have be struggling for a while with this bit of Python. I have not wrote this code it got installed with the the tracker from this website (https://medium.com/@onehitwonder/how-to-build-a-raspberry-pi-...
1
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0
answers
68
views
Problem with reading GPIO input value - photoeletric sensor
Good night!
I've got some problems with GPIO input values in my code (Python). I'm using a Raspberry Pi model 3, and RPi.GPIO as GPIO module. I'm tring to get the signal values of a photoeletric ...
1
vote
0
answers
271
views
Need to take a screenshot headless
I have a weather station and take a screenshot of a webpage (windy.com) once an hour to integrate into my display which runs on a Pi 3
It was working perfectly until I had an SD card crash and had to ...
- 11
2
votes
1
answer
281
views
Controlling stepper motor with Raspberry pi
I am building a sorting machine for a project where I want to sort the balls based on their color. For the actual sorting mechanism I am using a stepping motor (NEMA 17 with Driver DRV8825). I ...
- 21
0
votes
1
answer
448
views
reading two webcams in opencv
If I run this code on a PC with two webcams attached it runs fast (or fast enough) without any issues:
import cv2
cap0 = cv2.VideoCapture(0)
cap1 = cv2.VideoCapture(1)
while True:
ret0, img0 = ...
- 51
0
votes
1
answer
88
views
Talking to MAX31865 from Raspberry Pi using Serial Peripheral Interface
I am trying to talk to the MAX31865 board from a Raspberry Pi over SPI but am not getting the results I'd expect. Can someone with more SPI experience take a look at my setup and point to what I may ...
0
votes
3
answers
700
views
Python script stops mysteriously after a few hours
The Problem
I have a raspberry pi 3b+ running a python 3.7 script that is controlling an arduino. The arduino is reading values in from a few different sensors, and sending the data back to the python ...
0
votes
0
answers
157
views
How to controlling a mouse with a joystick and button using python, gpiozero
I am trying to use the GPIO pins from my raspy berry pi to control my mouse
I have a joystick connected to these gpio pins
pin 24 - mouse up
pin 25 - mouse down
pin 5 - mouse left
pin 6 - mouse right
...
0
votes
1
answer
55
views
Why can't Pycharm find remote python3.9?
I am using pycharm for remote development with rpi3, when I try to run my code I get the error from pycharm that it can't find a file: (IGNORE the X)
Error running 'test': Cannot run program "...
- 5
0
votes
0
answers
331
views
RPI USB Camera stops sending images, times out, and fails to work
TL;DR - My camera on my Pi stops working all together after an hour-ish. Any ideas why would be a big help.
I'm running a camera on my RPI which times out after a while and even if I try to do a USB ...
- 101
0
votes
2
answers
101
views
Cronjob Raspberry Pi not working
I am trying to use my raspi to host a discord bot that every morning publishes the food in my school. I have setup a bronjob with crontab -e but it's not working.
Crontab lookis like this:
45 07 * 2-5 ...
0
votes
0
answers
23
views
Python IDLE behaves differently in Windows and Raspbian
I have an developed an application in windows. The application is used to read some data from the sensor, process it and display it in GUI. When the application is running the python shell is not ...
0
votes
1
answer
962
views
How to communicate between multiple Raspberry Pi using Python
I am looking to buy some Raspberry Pi computers to do various tasks. For example, maybe one could water a plant when requested. The part I am struggling to find help with is creating a server where a ...
- 1
1
vote
0
answers
152
views
librosa on a raspberry pi
I have a problem with librosa installation on raspberry pi. I followed the instructions from the comment @Austin from:
Unable to pip install librosa in raspberry pi 3 model b+ (Raspbian stretch)
I ...
- 21
0
votes
2
answers
65
views
Using multiple LDRs and capacitors with Raspberry Pi 3B +
I am pairing an LDR with a capacitor to to make a light sensing project by returning the value of the variable COUNT when the capacitor is charged. But when i do this with 2 or more LDRs the values of ...
- 1
1
vote
0
answers
303
views
ftd2xx python library doesn't work in raspberry pi
I have installed Raspberry Pi OS with desktop and recommended software(bullseye). I tried pip install ftd2xx. The installation was complete. I have used the library in windows and developed an program....
0
votes
0
answers
29
views
Intermittent problem with HQ camera
I am using PiCameraX to gather Bayer level images repeatedly using an HQ Camera. Every so often it fails in the following way, and I'm struggling to see what is wrong. The camera is working fine ...
- 101
-1
votes
1
answer
98
views
Analog audio out when starting from /etc/rc.local
I am working on a python program that I am having some issues with. When the user presses a button a video starts playing. I need the audio to come from the analog jack. It works perfectly when I run ...
-1
votes
1
answer
602
views
NameError: name 'I2C' is not defined (Raspberry Pi 4 Model B - Ubuntu 18.04 - adafruit_lidarlite)
I am getting an issue while trying to use the library "adafruit_circuitpython_lidarlite".
Below are the details of my environment:
1- Distributor ID: Ubuntu (ubuntu-18.04.5-preinstalled-...
- 99