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.
0
votes
0answers
10 views
Pygame initalisation for TFT on /dev/fb1 only succeeds as root
I connected a 320x240 TFT to my Raspberry Pi A+ running Raspbian stretch via SPI and set it up as fbtft_device.
It shows up in /dev/fb1 and I can write images to it via pygame.
I initialize it like ...
0
votes
0answers
19 views
How can I install/use smptlib in Python 3.x with Thonny
I have got this response. I have no idea how to avoid it:
Traceback (most recent call last):
File "/home/pi/Franz/email3.py", line 2, in <module>
import smtplib
File "/usr/lib/python3/...
0
votes
0answers
25 views
MQTT connection to broker
Hello I would like to configure paho mqtt but I am having trouble to get it to work properly. I am trying to connect my raspberry to external server where broker is up and running. Port and IP are ...
1
vote
1answer
32 views
JSON not working with LIRC
I have the following script which is meant to write/read a json file. The problem is it will only write/read the file from the command line and not when using a remote via LIRC.
import RPi.GPIO as ...
0
votes
1answer
63 views
prevent script running twice consecutively - Python
I have the following two Python scripts one sends a motor forward while the other script sends it backwards. Each script is operated by it's own button on a remote.
Script A
import RPi.GPIO as GPIO
...
-4
votes
0answers
33 views
I need help coding a toggle button for led? [duplicate]
I have hooked up my circuit and it works as a hold button to turn light on. Then when I let go of button light turns off but I have found no way to make a toggle button for led. If somebody were so ...
0
votes
0answers
16 views
Gpiozero inside custom function
So I have a odd problem.
I have raspberry pi model 3 using gpiozero in python 3.
Just trying to turn on the motor at half speed when calling the function.
Issue is that nothing happens when ...
0
votes
2answers
53 views
How to make a button toggle a led?
I have some code which turns an led on when I hold the button. But only when I am pressing it. Could somebody help me so when I press the button then the light stays on and if I press it again the led ...
0
votes
1answer
20 views
Need help blinking a led continuously?
I'm new to Python and just go this Raspberry Pi, and need help blinking this led. I have got it to where the LED will blink once( Turn on for a second, then turn off). I need some help so when I hit ...
0
votes
0answers
31 views
Not able to install the latest version of Scipy(1.2.0) on Raspbian
I have Scipy version 0.18.2 on my RaspberryPi 3. However, I need the find_peaks() function which is only available on higher versions.
I followed this link to install scipy.
But the python3 setup.py ...
2
votes
1answer
38 views
read variable and trigger event - python
I have the following script which increases the counter variable every time a button is pressed. When counter reaches a certain number i.e. 10 lets say I want an event to trigger.
from time import ...
0
votes
0answers
52 views
Installing gstreamer on raspian
I am trying to compile gstreamer 1.14.4 to take advantage of the webrtc module. I was able to successfully compile it using cerbero on my raspberry pi but I have an issue where when testing my webrtc ...
-1
votes
0answers
24 views
real time voice to qrcode using pyhton
How to convert audio signals to QRcode using raspberry using python.I want to record the voice using a microphone and convert it into QRcode.When I scan the QRcode the audio should be played.I have ...
1
vote
1answer
34 views
Running a Python Script with Tensorflow via systemd doesn't work, but running the same script via the terminal works
I have successfully coded a Python 3 Script that detects objects in a frame given my the camera. Based on those objects detected, I run commands and logic. I have tested this and I can run it via the ...
0
votes
0answers
54 views
problem connecting with port serial0 for serial comm
I am facing this issue that I can't solve, I've been on this like 3 days and it is really frustrating!
I'm trying to test AT commands through port serial0, I've tried it in a python file and when i ...
0
votes
1answer
38 views
How can hide ffmpeg output?
os.system('ffmpeg -ss 00:08:00 -i '+dAdi+' -frames:v 1 /home/pi/Desktop/filmekrangoruntuleri/'+egAdi+'2.jpg')
When I run my python(3) script through the terminal, I see the following outputs produced ...
0
votes
0answers
43 views
Using Python smbus to communicate with Smart Battery
Getting I/O errors when using Python 3 smbus module under Raspbian to retrieve (read) data back from a laptop Smart Battery. A similar program coded in C for Arduino works perfectly with this battery. ...
0
votes
1answer
25 views
Is in Python anything like in Java platform.exit() to leave the program [closed]
I got a Button and when the Button was tapped it runs a function.
Till here I got everything ready. And now my question I will close the program correct like in the title. Is in Python anything like ...
1
vote
1answer
113 views
Upgrading to Latest Numpy Version on Raspberry Pi 3
I'm not sure if this is a Raspberry Pi issue, Raspbian Issue, Python Issue, or all of the above. So forgive me if this is the wrong place to ask this.
I just got me a Raspberry Pi 3B+ and installed ...
0
votes
2answers
79 views
AttributeError: 'NoneType' object has no attribute 'send' pigpiod
So I create an another program that can run stepper motor clockwise and counter clockwise with a ramp up and ramp down in there and adding limiter switch on GPIO 16 and 26 to stop the pi....
0
votes
2answers
20 views
Program not able to open file at start up but when running from command line, runs as expected
using a library from https://github.com/BLavery/LIBtft144
this line of code doesn't seem to run when I run the program from a systemd. I also tried calling it from a crontab call of my .py program.
...
0
votes
1answer
34 views
GPIO LED Python
I am not sure what I am doing wrong here.
I found this guide on but it's not working for me. The program does not output any errors but the LED doesn't light up.
I have and LED with + on GPIO 12 ...
0
votes
2answers
578 views
Installing Python 2.7
I am new to the Raspberry Pi, I have a project. I would like to work on Python 2 not Python 3.
By default Python 3 is installed on my Pi. I want to change or remove this version and I want to ...
-2
votes
1answer
38 views
Run a fan 5scs long GPIO
def fan_on():
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
FAN_PIN = 23
GPIO.setup(FAN_PIN,GPIO.OUT)
GPIO.output(FAN_PIN,True)
This is my code to run a fan on my rpi via GPIO
...
0
votes
0answers
27 views
DC Motors Not Moving, Programming or Wiring Error?
I got a Raspberry Pi 3B, That ive hooked 4 DC motors up to (with a motor controller of course). I run the program and they do not move, i cant figure out if im missing something or wired something up ...
0
votes
1answer
62 views
pigpio python serial wave output not correct
I am trying to use joan's pigpio to write a serial command on my Rpi 3 gpio 14(UART0TX).My goal is to write a command from the pi to another device.
When i send the command i do not see the ...
0
votes
1answer
42 views
cv2.line is not working in Rpi 3
model no: RPi 3 B
Software: Python 3.5.3
Problem:
I am using opencv 3.4 .I was trying to draw a line using function cv2.line().But it returns nothing.But the same code was working fine in my laptop ...
0
votes
0answers
37 views
Flask/Apache running @app.before_first_request twice
I have my raspberry pi running flask/Apache. I have a background task that I run using multiprocessing. (I know celery does this, but I just wanted something simple).
My issue is that the background ...
0
votes
1answer
46 views
Installing library to raspberry pi problems
I'm trying to install a library to my RPi 3 B, but for some reason when I try to import it in my script, it won't recognize the library. This is the library:
https://github.com/widgetlords/...
0
votes
1answer
86 views
Reading Real-Time Temperature of Raspberry Pi in Guizero
Is there an option to display Raspberry Pi's internal temperature value to be able to display it into Guizero UI?
I saw this source code on GitHub, but this only displays random float numbers in the ...
0
votes
1answer
179 views
Stream Deck Using PI 2
I have a RPi2 1gb. I've recently got a touch screen for it and have decided that I actually should use it for what it was intended for. Programming! So my adventure starts here.
I want to make a ...
0
votes
0answers
50 views
GSM/GPRS SIM800L working in England,UK
I am from England and I am using SIM800L Module for sending the SMS. My module is not connecting with the network. I don't know what's the issue, I wanna know whether this module (SIM800L) works in ...
0
votes
0answers
47 views
AttributeError: ge_add_event_data
I get this error when i try to import pynput to control my motor using keyboard:
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/Xlib/display.py",
line 224, in ...
1
vote
0answers
42 views
Pi-3, Model B, SenseHat - How can I restart my code while it's active.?
I am new with python and PI. I have been looking all over for information about this but with no luck.
currently it works like this:
I start the program, I press the button and then it starts counting ...
0
votes
1answer
36 views
Tkinterhtml fails to run on raspbian. Python 3.7
Tkinterhtml fails to run on Raspbian. Python 3.7
_tkinter.TclError: couldn't load file "/usr/local/lib/python3.7/site-packages/tkinterhtml/tkhtml/Linux/32-bit/Tkhtml/libTkhtml3.0.so":
/usr/local/lib/...
0
votes
2answers
35 views
Is it possible to find the current sampling rate of MCP3008? [closed]
I am using MCP3008 with Raspberrypi Model B. MCP3008 is sampling the analog signal. But is there any way through which I can verify if it is correct or not. For example, I need a sampling rate of 1.5 ...
0
votes
0answers
18 views
Is it possible to use half the screen as touch screen and the other half as a waveform display pane?
I am using waveshare 3.5 inch RPi LCD (A). Is it possible to use it as just a display for waveforms and half the screen of it responsive to the touch?
0
votes
0answers
79 views
Running python in PHP shows error. -sudo: no tty present and no askpass program specified
I want to run a python script to turn an led on from PHP. The script did not run. I used echo to print the error. It said "sudo: no tty present and no askpass program specified". What should I do? ...
1
vote
2answers
78 views
crontab schedule .py file
I am attempting to run a scheduled .py file every 5 minutes with crontab but I don't think it's working.
I'm following this post with the instructions:
Can't run python script from cron
I opened ...
1
vote
2answers
261 views
open a terminal on boot and auto-run a looping python script
When my RPI3 is booted, I would like it to automatically have the terminal open with my python script already running. Note that it loops endlessly. I want to open the terminal so I check the output ...
1
vote
1answer
119 views
Python script not running when added to crontab
I have an on_reboot.sh file that contains the following:
#!/bin/bash
source /home/pi/.profile
workon cv
cd /home/pi/reboot
python pi_test.py
After that I made the file executable using
$ chmod +x ...
1
vote
1answer
854 views
How to fix Remote I/O Error Whilst Using i2c OLED
I was using my i2c OLED perfectly well when seemingly for no reason I started getting the Remote I/O Error when I ran my Python program. For some reason this was fixed by installing i2c tools again. ...
0
votes
1answer
41 views
Picamera (in Terminal and Python 3) just does nothing
I have a Picamera V2, a brand new Flex Cable (so that's not the problem) and a Pi 3B.
I am using VNC from Ubuntu. The Pi connects OK. But in the terminal (raspistill - o hi.jpg) and in Python 3
(
...
-1
votes
1answer
35 views
python basic problem in developing raspberry pi 3 GPIO skill
this is a part of a code for picroft skill:
def handle_command_intent(self, message):
if message.data["command"].upper() == "BLINK":
self.speak_dialog("ledblink")
the "data" and "...
0
votes
1answer
33 views
Run python function once usb is mounted [closed]
I'm currently having a problem on how can I run a python function once the user mounts a flash drive. I have a GUI that's in idle mode and the user can start using when he/she plugs a flash drive. ...
3
votes
0answers
187 views
Accelerated Numpy on Pi 3 B+
I'm looking to do some work with NumPy on my Pi 3 B+, and I'm not sure what the deal is with optimization, blas, etc.
I installed libatlas using:
sudo apt-get install libatlas-base-dev
Following ...
0
votes
0answers
20 views
Rpi stops giving encoder data
I am again reposting my question.
I am working on a hobby project and I have written the code to take encoder data and calculate the motor RPM which works fine. But sometimes it is very strange that ...
1
vote
1answer
112 views
Why does my raspberry pi zero w crashes when controlling a DC motor with an L9232D and a 9g Servo motor?
I use this simple circuit to control a DC motor with an L293D, and a 9g servo motor with a Raspberry PI Zero W:
I use the simple following code to test the circuit:
from time import sleep
import RPi....
2
votes
0answers
4k views
How to install Python 3.7 with SSL? [closed]
I have compiled and installed Python 3.7 on my Raspberry Pi, but SSL is not working.
These are the steps I took to install the new Python:
Prerequisites:
$ sudo apt-get update
$ sudo apt-get ...
1
vote
2answers
89 views
Autostarting a python script at boot not working in /etc/rc.local and systemd
I am working on a data acquisition project where I am sending a bunch of sensor data to the cloud. Here is a small snippet from my code:
#!/usr/bin/python3
# coding: utf-8
import ctypes
from systemd ...
