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.
543
questions
0
votes
0answers
27 views
GPIO readout from Geiger Müller board is low when it clicks
I am using a RPI 3b and this board. I setup everything according to this guide. It's also my first RPI project so maybe I am missing something.
The code I am running:
import RPi.GPIO as GPIO
GPIO....
1
vote
2answers
51 views
+50
Thermal mini printer receipt adafruit printing gibberish
I have written a very simple program in python to print the text value in the mini thermal receipt printer adafruit.
Code:
# On a CircuitPython microcontroller:
import board
import busio
import serial
...
0
votes
0answers
23 views
pause raspberry pi 4 taking input from MFRC522 while the video is playing
The cards have video file names written to them. When a card is placed on the MFRC522 sensor, the video is played. Now, I am unable to figure out how to stop or pause the raspberry PI from taking the ...
0
votes
1answer
41 views
How to use multiple HC-SR04 distance sensors
For a project I need to use many distance sensors HC-SR04 using less pins possible of a Pi Zero W. I was able to do a test program in python3 with one sensor connected using gpiozero library and it ...
0
votes
0answers
22 views
Tkinter's 'create_text' inconsistent between raspberry pis
This one has me completely stumped, hoping someone can point me in the right direction!
Here's my MRE of the issue:
from tkinter import *
root = Tk()
w = 200
h = 200
c = Canvas(root, width=w, ...
1
vote
0answers
31 views
GPIO9 Input Always Active
Porting an application from a RPi 3 to an RPi 4 that requires several button inputs. All are working properly, except the button in GPIO9 (Pin 21) is always high/true. Guessing this has to do with SPI ...
0
votes
1answer
141 views
problems installing deepspeech on a pi 4
Ive been trying to get Mozillas deepspeech installed but i keep running in to the same problem. here is the terminal output
pi@raspberrypi:~/dev/deepspeech $ pip install deepspeech
Looking in indexes: ...
1
vote
1answer
312 views
Pi Camera 1.3 not detected despite v4l2-ctl listing it
Before you say that I haven't searched the internet, whenever I type "pi camera not detected" I literally don't see a single unclicked result. I am slowly breaking apart.
PI 4 (8gb), V1.3 ...
0
votes
0answers
35 views
How to setup webserver?
Good day, I know this has been asked A LOT, but everything I've tried doesn't work at all. I've tried using Geany and python code to create the webserver as well as apache2, but neither of them work. ...
0
votes
1answer
16 views
RF433 Rpi Serial cannot read signals in Python
I am running this code.
import serial
import time
serialport = serial.Serial('/dev/serial0',baudrate=1200, timeout=3)
t = "ttt"
while True:
serialport.flush()
serialport.write(t....
0
votes
0answers
31 views
Unable to open pycharm on raspberry pi 4
when i type ./pycharm.sh in terminal it throughs the following error:
"Error occured during intialization of VM
java/lang/ClassFormatError: Unknown constant tag 101 in class file java/lang/...
-1
votes
2answers
172 views
How can I resolve this error? SSLError("Can't connect to HTTPS URL because the SSL module is not available.")
I can't figure this out. I've now researched and tried for hours but I can't solve this so hear me out.
I have a Raspberry Pi 3 B+ and installed Raspbian OS on it.
Raspbian came with Python2.X and ...
0
votes
0answers
98 views
picamera: Incorrect buffer length error when resizing in picamera.capture
I am trying to use picamera to record and save a high resolution video, and capture low resolution images for processing using openCV.
import picamera
import picamera.array
import cv2
import numpy as ...
0
votes
2answers
64 views
Pyserial, Python3, and RPi not working together
I'm trying to get a TTY to USB converter hooked up with my Raspberry Pi. I'm using Pyserial to setup the connection and write data to the port in a script called pc_test.py. For some reason the script ...
0
votes
0answers
37 views
Not Able to Change Volume with Cron (tried Python)
Alright, I've been trying this for several days and I'm just dying here...
I am putting together a kiosk that should play video. I'm using a NUC with Raspberry Pi Desktop. Everything works but ...
0
votes
1answer
35 views
Raspberry Pi 4 b+ with SIM900A Module Error
I'm working on a project that includes send a SMS message. I have tried connecting my raspberry pi with sim900a. Having problems with communication with sim. I've tried using AT commands with minicom ...
0
votes
1answer
75 views
Raspberry Pi Zero W taking 38 seconds to boot, how can I speed it up?
I'm using Crontab to start a python file with the code:
@reboot sleep 5 && Sudo python3 /home/pi/file.py
The file uses the internet to retrieve some JSON data and display it on a screen
...
0
votes
0answers
44 views
How to control door opener from raspberry pi?
I am trying to control a 6V DC door opener which requires 660 mA current supply. Since the Pi only tolerates a maximum of 5V without a relay. As per my research I need a solid-state relay with ...
5
votes
1answer
108 views
raspberry pi 4 using SPI 4 & 5 at the same time causes kernel oops and crashes the whole system
intro
i want to use multiple SPI busses at the same time.
but when i use to use SPI 4 and SPI 5 at the same time it crashes the whole system
it doesn't crash instantly sometimes it takes 10 seconds ...
0
votes
0answers
6 views
is that a way we can boot Fast Compute module 3+ using QT5 Application on start
i am working on compute module 3 plus. and os is respbian buster. I need only wifi and usb services . so please could you please help me how can i boot the fast. because compute takes more than 20 sec ...
-1
votes
2answers
194 views
Raspberry pi 4 gpio pins not working
My Raspberry pi 4 gpio pins are not working for some reason I tried uninstalling and reinstalling rpi.gpio and gpio and it did not work here is the code
import RPI.GPIO as GPIO
import time
led = 26
...
0
votes
0answers
37 views
How to enable guests to join a captive portal in a new local network?
I am reading online tutorials about setting up captive portals for my raspberry pi using python, they all require an active internet connection to setup.
My question is: If I setup the Pi in my own ...
0
votes
0answers
28 views
i need execute code when user input number in terminal in python3
I have this python3 code.
import RPi.GPIO as GPIO
import requests
payload = {}
headers = {}
GPIO.setmode(GPIO.BCM)
GPIO.setup(14, GPIO.OUT)
string = input()
def buclick(event):
url = "http:/...
-1
votes
1answer
115 views
How can I use pigpio to "sniff" and collect data exchanged along an existing USB connection between two devices?
A controller module (power supply) for piece of scientific equipment in our lab uses a Windows program on a PC for a human interface via USB connection. I have a list of the "set" and "...
0
votes
1answer
200 views
How to transfer large amount of data (100Kbytes) over SPI?
Related/previous question here. I'm looking to do a data logging project that involves transmitting data from an FPGA to a Raspberry Pi 4 through SPI. The FPGA will transfer 250,000 bytes ...
0
votes
0answers
13 views
how to install onnxruntime on raspberry pi 3 [duplicate]
I want to setup onnxruntime python library on raspberry pi 3 and I tried some ways to install it but I couldn't . the ways that I followed are : 1 - way1 2 - way2 3 - using pip3 I want to know is ...
0
votes
0answers
62 views
HELP - Bluetoothctl Scan in Python3
I'm new to python and with bluetoothctl and I need to automate the bluetoothcl scan on process in python so that I just need to open the python file and start scanning right away.
I've been doing a ...
0
votes
4answers
530 views
Crontab won't run python script
I'm trying to run two simple python scripts from crontab:
crontab file:
@reboot /usr/bin/python3 /home/pi/init_server.py
@reboot /usr/bin/python3 /home/pi/scheduler.py
crontab log:
Aug 12 10:07:11 ...
0
votes
1answer
25 views
Servo control issue
I have written a small program that controls two servos: to start the recording process one servo opens a shutter (servo1), then the second one lifts a sky camera out of a housing (servo2). To stop ...
0
votes
0answers
24 views
Calling pulseaudio: paplay - p record.wav from python script doesn't work
Objective: run a wav file from python on a Bluetooth headset paired to the raspberry Pi.
So far my code works well when I run it on the raspberry pi in python. Once I call the same python script from ....
0
votes
0answers
48 views
PIP3: Install Offline & Update Older Library
Tried these commands to install an uncompressed package with pip3:
pip3 install --no-index --find-links=/home/pi/Downloads/GitHub/cryptography cryptography
sudo pip3 install -U --no-index --find-links=...
1
vote
0answers
33 views
Raspberry Pi Python 3 Script - RuntimeError: Failed to add edge detection
I have looked at all the posts about this error, but none have cured it for me.
I am using a ChronoDot RTC on an old Pi B+ with the SQW Wave Output going to Pin 8 which I use to update an LCD display ...
0
votes
1answer
39 views
How to run root in autostart
I have successfully launched a python script using "LXDE-PI" autostart function, however, this script needs to run as root in order to function correctly. How can I do this? Where would I ...
0
votes
1answer
32 views
python3 code doesn't write files when opened with rc.local
i coded a small datalogger in python3 that gets readings from an Arduino and stores them locally. The code works if i open it manually, but as soon as i reboot and code runs from rc.local it stops ...
1
vote
0answers
30 views
heartbeat sensor for pi
i want to measure the heartbeat using the pulse sensor. i connected the pulse sensor to a mcp3008 adc and the pi.
this is the code i used
from pulsesensor import Pulsesensor
import time
p = ...
0
votes
0answers
20 views
Cmake : interpreter and numpy virtual environment path problem
I am trying to install OpenCV 4 on a Raspberry pi b+ flowing this Article , Everything looks good until i come to Step #5 the outputs of cmake are different, even though i followed the previous steps ...
-1
votes
1answer
61 views
How to UNDO unwanted changes on my raspberry pi 4. Bash_profile not found
Updated Question.
I was trying to add this directory "/usr/local/opt/python-3.9.0/bin" to PATH on raspberry pi 4 and so I edited the bash file by adding the line: PATH = "/usr/local/...
0
votes
1answer
79 views
Using Pymodbus, I want to tie coil states to GPIO pins within my server not from a client
I am writing a PyModbus asynchronous updating server based on the example on the Pymodbus Asynchronous Server Example and I want to link the states of the coils to GPIO pin states, such as when coil 1 ...
0
votes
0answers
38 views
AttributeError: 'module' object has no attribute 'FFI'
I am trying to set up Picovoice's Rhino to my Raspberry Pi Zero W. I have followed all the instructions on the website: link
My RPi uses Python 3.4.2. I have updated the packages using:
sudo apt-get ...
0
votes
0answers
24 views
Receive pycam video from socket and save to file or process it
I tried using the pycam documentation 3.13. Recording to a network stream where the client is the pycam that sends H.264 video over a socket and the server incrementally reads a file-like object and ...
0
votes
1answer
70 views
Raspberry pi zero don't see i2c device
I try to connect to raspberry pi zero by i2c bus 3 different devices: 3 accelerometers mpu6050, 1 barometer BMP280, 1 compass QMC5883L. The mpu6050, BMP280 and QMC5883L have a different addresses. ...
0
votes
0answers
291 views
Unable to import pyserial or serial in python 3.4.2
I am not able to import pyserial or serial module in a python script. Package is properly installed (I think) using the following commands:
sudo apt-get install python3-serial
pip3 install pyserial --...
0
votes
1answer
63 views
Systemd service not updating
I have a service on my Raspberry Pi which runs a bash file on boot. I recently updated the bash file (run.sh) but the service is not reflecting the update.
So far I have tried:
sudo systemctl disable/...
0
votes
0answers
18 views
using the # key to work as a enter button for 4x3 matrix keypad
I am doing a project where I require the user to enter the value on a keypad. this value is then given to the pi. I was using the pad4pi library function but I could only select a single digit ,is ...
0
votes
1answer
24 views
Autostart random video script throws IndexError
I am trying to autoplay a random video from an attached usb volume upon boot on my Pi 4 Model B Rev 1.2.
The following Python 3 script works within Thonny, popping a Tk message box with the randomly ...
0
votes
1answer
157 views
Cron python job not running
I tried to automate the launch of a python script.
After having tested it works in thonny, I moved to Cron and I got quite lost.
I started from calling 12 21 * * * /usr/bin/python3 /home/pi/main.py
to ...
0
votes
0answers
24 views
Temperature and Humidity does not print on LCD
I am working with a DHT 11 and LCD. When executing the code, the temperature prints one time on the pc and freezes. It does not print on the LCD though neither. Can I have someone assist me with ...
1
vote
2answers
207 views
Trying to debug why the magnetic sensor of my MPU9250/6500 Gyroscope Acceleration Magnetic Sensor won't connect via I2C but all the other sensors will
I am trying to debug why the magnetic sensor of my MPU9250/6500 9-Axis 9 DOF 16 Bit Gyroscope Acceleration Magnetic Sensor IIC/SPI won't connect to my Raspberry Pi 4+, but all the other sensors will. ...
0
votes
1answer
26 views
Understand the plumbing behind running RasberryPI code from Freenove in Python
I have downloaded some pre-made code from Freenove - https://github.com/Freenove/Freenove_Ultimate_Starter_Kit_for_Raspberry_Pi
Freenove uses WiringPi. So I downloaded WiringPi and ran build.
Question ...
1
vote
2answers
40 views
Take Serial (tx/rx GPIO) Input with script running at startup
I've run lots of cron jobs and have set up scripts to run at startup. I assumed this would be an easy task because maybe I'm missing something.
I have a script that when it sees a specific message ...
