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.

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4
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3answers
4k 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 ...
2
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1answer
678 views

Capture image when camera is not covered

I am very new to R Pi, but I know my Python. I am working on a project where I have an always running camera, that is kept in dark. What I need to do is to capture an image when there is light. (lets ...
1
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3answers
78 views

Reboot not starting python app but executing runs with no Errors

I'm running a bell app connected by ENet between two RPI 4. The button end works well, but the server end only works when I sign in to activate it. How do I get it to start at start-up in Crontab? @...
6
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2answers
12k views

How fast can GPIO pins toggle?

I'm currently using Python's RPi.GPIO module to toggle some pins, and I want to know how quickly it can do this. I need the pins to be toggled on the schedule of a ~50 mhz FPGA clock, which I'm ...
1
vote
1answer
633 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 '...
3
votes
1answer
718 views

Turn Up or Down Volume for OMXPlayer 3.5mm Audio Jack

on my raspberry pi i have a speaker wired connected via aux cable to the 3.5mm audio jack. My first question ishow can i get rid of the noise coming out of my 3.5mm audio jack when keys are pressed or ...
2
votes
1answer
3k views

Found a PyPi Package for Opencv-contrib, but can't install using pip

I'm trying to install OpenCV for python with extra modules on my raspberry pi. The OpenCV website has a set of instructions that I have tried with different variations for the past several months. I ...
1
vote
1answer
2k views

Seeed ADC (ADS1115) with Raspberry Pi 3 B+to read voltage values using python3

I'm using a Seeed 4-Channel 16-Bit ADC (ADS1115) for Raspberry Pi with a Stretch installed Raspberry Pi 3 B+ and successfully configured following below guidelines & GitHub. http://wiki....
0
votes
1answer
372 views

Rpi python using L298 motor driver and PCA9685 servo controller to change speed and diretion of robot car

I am unable to understand the code provided with the raspberry pi robo kit I got. I need help in understanding the code as I am new to raspberry. Thanks! #!/usr/bin/python3 # File name : ...
4
votes
2answers
6k views

Raspberry Pi 3B+ freezes randomly

General setup My RPi is connected to a mouse, keyboard, and monitor. My swap size is set to 1000 MB and I'm not using wifi. Problem The RPi freezes randomly, meaning the GUI is frozen, no SSH ...
1
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3answers
2k views

Raspberry Pi won't recognize nRF24L01+

I'm a Raspberry Pi n00b and a python beginner, but I have a lot of experience with DIY electronics, arduino and c#. I've tried everything I can think of, and I just can't get the Pi to recognise the ...
3
votes
2answers
9k views

Pip3 install throwing error on raspberry pi 3 Raspbian-Jessie

I am trying to install a python 3 library on a raspberry pi 3 running Raspbian-Jessie. sudo pip3 install LIBRARY However, regardless of what library I try to install, I am getting this error: ...
2
votes
5answers
17k views

How do I connect GSM SIM 900A to a Raspberry Pi 3?

I want to connect the GSM SIM 900A to a Raspberry Pi 3 but I don't where the problem is. I used this configuration: https://qph.fs.quoracdn.net/main-qimg-c124f9e741afd438969e869e52d0df6b Then I ...
2
votes
2answers
557 views

How does Raspbian know it's been installed in a Pi or Compute Module?

I want to design a python script that would allow me to check whether it's currently in a standard Pi 3 or it's in a Compute Module 3. But I have no idea even on how Raspbian OS know itself is ...
2
votes
2answers
264 views

How can Rpi4B select multiple ADS1115 ADCs using PCA9546 / TCA9548A I2C multiplexer?

I have a PCA9546 i2c multiplexer hook to my raspberry pi under it are 4 ads1115 i2c ADC. My first main problem is how do you switch the address of the i2c in python the sample code that i have seems ...
1
vote
1answer
77 views

python script not launching when put into crontab

I have two python scripts, flickSwitch.py & measureTemp.py, the first calls the second when a button is pressed. All works fine when run directly from /home/pi. I put the first script into ...
1
vote
0answers
42 views

How to run “ import serial” and “import cv2” in one python file?

I am actually creating my project wherein I can control my raspberry pi in my pc using FPV Radio Telemetry. The scenario is my pc will send string data like "red" and "blue" to my pi. After my pi ...
1
vote
1answer
224 views

Raspberry Pi 4 to Mitutoyo Digimatic interface

I've been trying to interface a Mitutoyo digital caliper. I used the code from here and I think I made the right corrections according to the posters comments but as I checked he was last online in ...
1
vote
1answer
349 views

Error Installing TensorFlow on Rasperry Pi 3 B

I'm following this guide to create an AI chatbot which requires Python 3.6, TensorFlow etc. So I installed Python 3.6.8. To install TensorFlow I tried sudo pip install tensorflow I also downloaded the ...
1
vote
1answer
56 views

Is there a motion/ location sensor for RPi/Python?

I'm currently working on a rough VR system using the Raspberry Pi 3, and, of course, for that, I need a way to track the custom headset and controllers. I need the sensors to be compatible with Python ...
1
vote
1answer
901 views

Picamera capture to array is slow

In python module picamera, does anyone noticed that camera.capture(array, 'rgb') is quite slow?? If you try to measure this time is about 540ms... example code (the "real code" is irrelevant): from ...
1
vote
1answer
337 views

How to open .bat file in VSCode using raspbian

From the website ( https://channel9.msdn.com/Blogs/jsturtevant/Setting-up-Project-Oxford-for-Python-on-Windows ) at about 4:27, the author opens the activate.bat file by using code .env\Scripts\...
1
vote
1answer
646 views

python.exe file not found; creating “virtual environment”

Aim: Build projectoxford into raspberrypi3 - https://channel9.msdn.com/Blogs/jsturtevant/Setting-up-Project-Oxford-for-Python-on-Windows At 2:11 of the video, for windows, the command used to create ...
1
vote
1answer
1k views

Cannot import patterns; workaround doesnt work either

Aim: Build projectoxford into raspberrypi3 - https://channel9.msdn.com/Blogs/jsturtevant/Setting-up-Project-Oxford-for-Python-on-Windows I have reached the steps of: pi@raspberrypi:~/happy-image-...
1
vote
1answer
4k views

Problem with matplotlib

I am attempting to run some matplotlib tutorials on my Pi3 running Raspbian Stretch. I have installed matplotlib & numpy using pip3 When trying to run any of the tutorials I get an error ...
0
votes
1answer
78 views

How can Rpi python 3 uses PCA9685 PWM controller to change direction and position of a servo?

I need help understanding the code in the turn.py file, which is a part of the this project, please look #!/usr/bin/python3 # File name : car_dir.py # Description : By controlling Servo,the camera ...
0
votes
3answers
662 views

Crontab suddenly doesn't start jobs

I'm suddenly having crontab issues, I didn't do anything other than change the script names and then change them in crontab as well so they all natch, the scripts work if I start them manually, so i'm ...
0
votes
0answers
340 views

Failed to load a keras model to my raspberry pi3 b+

I am trying to load a keras model to do classification task using my raspberry. But after running this code: import keras from keras.models import load_model model = load_model("mobilenet_v2_3(...
-1
votes
1answer
129 views

Distance sensor with 16x2 lcd display- ImportError: cannot import name lcddriver

Happy new year. I am working on a personal project which involves a distance sensor and a LCD display. The distance sensor's data should ideally be displayed on the 16x2 LCD display. The codes for the ...