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.
274
questions
1
vote
1answer
21 views
Can I just create a python thread per raspberry pi for parallel processing?
I have been looking to make a cluster of raspberry pi 4s, and have been pretty interested in it and made good head way. I have seen quite a few guides on the topic as well. I followed this one found ...
2
votes
0answers
38 views
Hardware controlled RTS on a Pi4 not working accurately
We need to use RS485 to talk to one of our custom tools. We need to use hardware controlled rts/cts. I've read so many articles about this but nobody ever says it works for them with fast timing and ...
0
votes
0answers
13 views
Display next up google calendar event (Python) [closed]
Hi I would like to somehow print in python what my next up or upcoming google calendar event(s) are.
I have never worked with API's before and I am new to python. Do you know what API / Library I ...
-1
votes
0answers
11 views
Raspberry Pi 3 connected to UCA202 using pyaudio to read analog sensor input in real time
I am trying to use a UCA202 as an ADC in a similar manner to that found on this blog:
https://makersportal.com/blog/2019/2/26/raspberry-pi-vibration-analysis-experiment-with-free-free-bar
So that ...
1
vote
1answer
28 views
Cannot install pandas on Raspberry Pi
I have been trying to install pandas for a week now. Read pretty much every thread I could find but nothing seems to work. I keep getting a ton of import and dpkg errors every time. Everything is up ...
0
votes
1answer
25 views
Running script after reboot does not work
I have a simple script will runs a loop that reads off temp data in the console from a sensor and then writes it to a file. I would like to make sure that this script starts running right after my pi ...
2
votes
0answers
33 views
Waveshare ADDA (ADS1256) full scale input issues
My question is about a problem of full scale output with the Waveshare ADDA ADS1256 card.
I use the Waveshare High-Precision AD/DA Board based on ADS1256 on a Raspberry Pi 3b and the Python3 examples....
1
vote
0answers
21 views
Schedule Video Recording
The code below records video for 24 hours straight which is too much. I wanna schedule the record like from 9.00am to 3.00pm only 6 hours of video. Being a novice and newbie I don't really know how to ...
0
votes
0answers
50 views
Speed drops in for-loops python on rpi
I am working with python 3.5 on rpi 3B+ and making a led matrix project. For that I would like to know at what speed my code is running each cycle. I will take the minimum and use that as a refresh ...
0
votes
1answer
20 views
spidev sanity check not working
ArchARM on Raspberry Pi 3, spidev installed from AUR.
I'm trying to control a Waveshare device via SPI, and can't get SPI to work from Python.
The most basic sanity test I can think of is failing:
...
-1
votes
1answer
38 views
Need a large (20 inch +) touch screen monitor Raspberry Pi 3b+/4b running Debian Buster
I'm looking for a large (20 inch +) touch screen monitor for Raspberry Pi 3b+/4b running Debian Buster. We tried the ViewSonic TD2230 but the driver support is lacking; Tkinter misses about 35% of the ...
0
votes
0answers
29 views
HC-SR04 Ultrasonic Rangefinder readings are off by a large margin
I'm making a robot that should avoid obstacles and im using a HC-SR04 to measure distances. My problem is that my readings are off by a large margin. when there is no obstacle in the way I get a ...
1
vote
0answers
20 views
I don't know why suddenly mjpg-streamer and webcam stop working
I have made a program that uses three webcams and three ultrasonic sensors using raspberry pi 3 and python 3. When each ultrasonic sensors detect stuff in front of them, webcam take a picture of it. ...
0
votes
2answers
19 views
Generating Stereo Audio in PI programmatically
I want a stereo output form the PI. The sound being played will not be a recorded sound rather it would be generated using a code (preferably python). For example, the program's input will be (x,y,z) ...
0
votes
1answer
36 views
Connecting pihut controller to pi zero. Syntax error when calling a script
Please let me know if I should provide any more information.
I'm trying to connect a pihut controller to a raspberry pi zero using code I found from approxeng. I am running python 3.5.
https://...
1
vote
1answer
91 views
No module named 'adafruit_circuitpython_servokit' [closed]
I have a Adafruit PWM hat and I am trying to run play around with some servos. However, when I run this line:
from adafruit_servokit import ServoKit
It returns:
No module named '...
-1
votes
2answers
51 views
How can i convert a python script into a Raspberry Pi 3 (Raspbian) executable?
I'm designing a GUI for my Raspberry Pi 3 B+. I've written the code in Python3.5 and now I want my script to be run as executable (Raspbian package).
Is it possible to do so and if possible any ...
0
votes
0answers
22 views
Could I use Processing.py to display text and shapes on a Waveshare ePaper display?
I am new to Raspberry Pi and programming in general. I have very basic knowledge on Processing.py and I would like to know is it possible I could use this library to display shapes and text on a ...
0
votes
0answers
36 views
Packages are correctly installed using pip3 in my virtual environment but are not being imported, I get ModuleNotFoundError
I am using a raspberry pi 3 with raspbian buster and python 3.7.3.
I can install packages fine in my virtual environment using pip3 install. This can be seen when I use the command pip list, all my ...
0
votes
1answer
43 views
MGR996R rotation angle
Basically I want to control the angle of the rotation of the servo motor but I don't seem to know how...
From the tech sheet I know this motor shouldn't be a continuous one, any hint would be ...
0
votes
0answers
8 views
Can I save and open multiple videos with OpenCV or any other module/package/method
So, I have been working on a project which requires me to open an animation/video if the user gives an input of a recognized string mentioned in my code. Basically if the word entered by the user is ...
0
votes
0answers
29 views
How to Volume control PAM8610 from RPI
Does anyone know how can I control PAM8610 module volume through code from RPI?
Thanks.
1
vote
0answers
32 views
softly increasing and decreasing volume with mpg123
I am using Picroft on raspberry pi 3. In picroft, every mp3 files run with mpg123. I am creating my own device using this OS. when I say it to sing a song it starts singing by playing mp3 files and ...
0
votes
1answer
50 views
Simulating OpenCL on a Raspberry Pi using Python
Is it possible to run code on a Raspberry Pi which simulates the use of OpenCL?
I am developing code on a computer which is capable of using OpenCL, and am testing this code remotely on a Raspberry ...
0
votes
0answers
340 views
ALSA Errors on Pi 3B+ using SpeechRecognition and PyAudio (Original Post missing stuff)
Using PyAudio I simply ran this piece of code:
import pyaudio
p = pyaudio.PyAudio()
for x in range(p.get_device_count()):
print(p.get_device_info_by_index(x).get('name'))
Getting these Errors:
...
2
votes
1answer
39 views
Reading more than 8 bits from an SI7021 sensor
I am using the Si7021-A20 sensor on a Raspberry Pi Zero WH (headless, controlled via ssh and VNC). I want to get readings using Python (version 3). However, I have a very hard time to actually get ...
0
votes
0answers
21 views
Binding PiCamera stream to GstWidget
Well, today I began to program in Python and I'm doing a graphical app with PyGtk in Anjuta.
My first objective is to get the stream of the PiCamera in a window. But I'm getting problems to manage the ...
1
vote
2answers
84 views
Raspberry Pi “Temporary failure in name resolution”
After many hours of googling and testing for a solution, I am stuck. I would really appreciate some advice.
Situation - I have (5) Raspberry Pis 3B+ (RP) at various customer locations and I want to ...
0
votes
0answers
32 views
Detect fire with pi cam module
I have a python script that uses a usb cam to detect fire with opencv, it worked well until changed to the picamera and now i get this error when i run the code:
File "seeFire.py", line 23, in
...
2
votes
0answers
27 views
Pin Crosstalk Issue [closed]
I'm working on a quick project with my dad for his condo. He wanted to setup a bunch of moisture sensors around the condo near sources of water (sinks, bathtubs, toilets, etc), which, if triggered, ...
1
vote
1answer
38 views
How do I reinstall Python 3?
I cannot get pip to work and I think that reinstalling python 3.7 might help. When I try 'sudo apt install --reinstall python3' I get an error saying there are unmet dependencies. If I specify it to ...
0
votes
0answers
21 views
error while opening the default python3 install in raspbian
well, i have been using python3.4.2 for sometime on my raspbian os however recently i tried to change the default to 3.7.2. unfortunately i failed to do so... i downloaded it but i couldn't make it ...
0
votes
0answers
27 views
php file not executing python script when called through browser
I have an apache2 webserver running on the pi. I have a php file that uses exec() to run a python script. Everything works well from the command line. when loaded through the browser, the exec() ...
0
votes
0answers
82 views
Simulate a mouse click in python tkinter
I have a tkinter GUI running on a Pi 3B+ with a 5" tft touch screen display. I am writing my own touch screen driver. The GUI works when I mouse click on a button that is bound to Button-1.
self....
2
votes
1answer
25 views
CE1 not going low for pigpio.spi_open() with flags
I'm attempting to modify joan's test script (https://raspberrypi.stackexchange.com/a/44320/42126) for an RPi SPI master to communicate with an Atmega328P slave. I cannot change which GPIO pins I have ...
0
votes
0answers
30 views
My Relay suddenly turns on and off, and this happens in a second
Well, I had written a code for Automatic Cooling with DHT 11, but I did not get any successful result in it, I want the Relay turn on when the humidity rises up, and I did not have any errors in my ...
1
vote
1answer
53 views
Timeout function for user input on 4x4 membrane keypad with pad4pi
I'm making a python script for a 4x4 keypad that's connected to a raspberry pi where the user enters a 4 pin code and the program tells the user whether or not it's correct. In order to take in the ...
1
vote
0answers
36 views
Making Python3 default on command line
I have been trying to run the Jupyter notebook on my Pi but the Kernels will not install into Jupiter even though I downloaded them through the Pi's Software download window. A little bit stumped and ...
0
votes
0answers
24 views
Cannot turn web streaming into a function
I'm working on a project with my Raspberry Pi 0 and a camera. I'm writing my code in Python using the PiCamera module.
This file handles setting up the camera and Starting Web streaming. I had no clue ...
0
votes
0answers
26 views
Start python server and Vue front end at boot
I'm trying to have my raspberry pi start a python server with connected Vue.js frontend at startup.
Right now i'm using crontab with the following configuration:
@reboot sh /home/pi/Desktop/server-...
2
votes
1answer
37 views
Why no result from os.popen() when script is run from crontab?
When I run this Python3 script from the command line or from Thonny I get correct results. When I run it through crontab the variables ipaddress an ssid stay empty.
Can anyone tell me why? Any ...
1
vote
1answer
24 views
RC522 modules stop working when more than 2 are connected
So, here's a synopsis of what I am trying to do. I want to put 3 RC522 readers side by side inside of a book, facing the cover, that will be constantly on, using a Rpi zero W. When an RFID chip gets ...
2
votes
2answers
473 views
Python3.7 with Numpy on Raspbian
Goal:
Install Python3.7 on the Raspberry Pi. Then install Numpy for Python3.7
Found this very useful Github Gist: https://gist.github.com/SeppPenner/6a5a30ebc8f79936fa136c524417761d
Ran the ...
2
votes
1answer
120 views
Raspberry pi 3 RFID RC522 Card UID is not same with USB RFID Reader
I'm working with RFID RC522 using Raspberrypi 3B+. I'm following https://github.com/mxgxw/MFRC522-python this package and works like a charm. I can able to read the data from the card, able to write ...
1
vote
2answers
51 views
Can't exit my apllication in a clean way
Not sure if my problem is related to RaspberryPi, GPIO or just my understanding of Python but since I'm detecting my problem while playing with a button attached to my PI I ask it here.
I have a ...
-1
votes
1answer
70 views
Segmentation fault error. Trying to loop a python program [closed]
I'm using AT commands to send data over http, but the problem is that sometimes the program has an error and wont run again until I reboot and the GSM. Im using a crontab and also running the file as ...
1
vote
0answers
16 views
Launch a python script in a lxterminal window using supervisord
I'm trying to launch a python script in a lxterminal window using supervisord. I'm stuck on using supervisord than a .desktop file. I'd like to keep the process running on loop Below is my config:
[...
0
votes
1answer
41 views
hc-sr04 stops on python after a very short while. F5 (run) and it works again, but only for a very short time again
Here's the code, it communicates with Sonic Pi, don't know if that matters:
import RPi.GPIO as GPIO
import time
import signal
import sys
from pythonosc import udp_client
from pythonosc import ...
1
vote
2answers
71 views
Detecting device path for USB scanner
I'm currently exploring ways to detect the correct device path (for ex: /dev/input/event0) for an USB scanner. With the following code in Python using the evdev package, I am able to filter down to a ...
4
votes
3answers
518 views
Launch a GUI Tkinter program on boot
I am trying to auto launch a Tkinter/Python program when the Raspberry Pi boots up.
Ideally I would like to boot the Pi into the console and then launch a GUI Tkinter Python program. In testing – not ...
