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.
336
questions
0
votes
0answers
16 views
Can't sudo apt-get update && sudo apt-get upgrade (won't complete task)
I am having an issues updating my raspbian operating system. After running sudo apt-get update && sudo apt-get upgrade -y I receive the following error messages:
Hit:1 http://raspbian....
1
vote
0answers
10 views
Why does native resolution capture with picamera raise 'Incorrect Buffer Length' for Arducam 8MP with IMX219 sensor?
I am trying to capture() full resolution images using picamera.array but it fails raising a PiCameraValueError: Incorrect buffer length for resolution 3280x2464.
camera.MAX_RESOLUTION gives ...
0
votes
0answers
23 views
Issues with timestamp creating overflow error
I'm trying to run a python script I wrote on my Raspberry Pi Zero but I keep getting the error OverflowError: timestamp out of range for platform time_t.
I'm relatively certain it's something with ...
-1
votes
0answers
52 views
Need help creating gif from timelapse images. Fails to write
I'm trying to create a gif from 960 images on an RPi 4 B.
I kept getting the cache error so I modified the ImageMagick policy.xml to reflect the values (PASTED AT BOTTOM OF POST)
Here's the .py ...
0
votes
2answers
63 views
Python3, Run two functions at the same while func1 accesses the variables created in func2 [closed]
I would like to run two functions at the same time.
One of the functions has to access the created variables of the other one.
What I've done so far:
import multiprocessing import Process
import sys
...
-3
votes
0answers
20 views
How to get optMouse coordinate (X,Y) on a raspberry?
I need to use my optical mouse as a sensor so I need a code that can get me the coordinate of the optmouse cursor on the raspberry pi.
Thank you.
0
votes
1answer
37 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
2answers
65 views
Use HC-SR04 Distance Sensor and Relay to trigger the Water Pump - Need help with triggering the pump
I am trying to trigger/stop a water pump with the use of a 4-channel relay and a UC-SR04 distance sensor.
I tried with some codes but I think I am missing something because although there was no error ...
0
votes
0answers
19 views
picamera.exe.PiCameraIOError: Failed to write 291840 bytes from buffer to output <picamera.stream.BufferIO object at 0x62f70c60>
Using the PiCamera Advanced Recipies in the link I am trying to capture the image to a numpy array. My code basic lines of code are.
final_image = np.empty((height , width , 3), dtype=np.uint8)
...
1
vote
0answers
29 views
PiGpio – pass through binary data
I have two ports connected to GPIO on a Raspberry, where I read and send data NMEA sentences to external equipment using the PiGpio library in python, and this is working fine.
Now I need to transfer ...
0
votes
0answers
117 views
issues while installing scipy
I updated the python version to 3.7. While installing scipy using sudo apt-get install python-scipy it says python-scipy is already the newest version (1.1.0-7)..
I also need a python package called ...
-2
votes
1answer
36 views
How to print list of availble networks and connect using python
I have been search for a couple of hours to find a a tutorial on how to show the list of available networks and connect to a network programmatically.I don't want to use command line.
I have ...
0
votes
1answer
37 views
Raspberry3b, Python3, Combine 2 codes which work by themself (Thonny, Geany) but not together in the same IDLE
I have to combine two codes and run them one after the other. Unfortunately, I can't start the gps_receiver on Thonny_ide and neighter the other code on the default Geany_ide.
Can somebody help me to ...
1
vote
1answer
60 views
lighting up LEDs from suricata security alerts
so I am a Python newbie attempting to write a script that will light up a different LED based on the priority level of the latest security alert added to a log file generated by the Suricata Intrusion ...
1
vote
1answer
39 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
90 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 ...
4
votes
3answers
133 views
Raspberry Pi Cluster for Computation
I am new to Raspberry Pi's (as well as this stackexchange) and would like to use them to learn how to build a small cluster. (Currently using this guide: https://medium.com/@glmdev/building-a-...
0
votes
0answers
16 views
How to add the hfp/hsp profile based speaker for input (speech recognition)and output simultaneously?
I m trying to make kinda type of assistant out of my raspberry pi 3 b+ model and so bought this
Speaker . So that I can use it to give audio input as well as get the output at the same time .
But I'm ...
2
votes
1answer
47 views
5v/12v power source/submersible water pump/RPI/relay. What kind of combination is suitable?
I am using a 12v DC water pump with a 20 l/min flow rate, a raspberry pi 3B and a distance sensor.
I would like to use a relay and an external power supply to control turning on/off the water pump. so ...
1
vote
0answers
35 views
Is there a way to stop Pyaudio and omxplayer from printing info
I am trying to create an application which uses wakeword with snowboy and speech recognition using the speechRecognition library in Python.
When I start my scripts, when say I my wake-word - 'Python'...
1
vote
0answers
30 views
“Attribute Error”- How to display data from distance sensor on lcd display?
I am trying to incorporate LCD display features with the codes that are already written for the sensor. "lcddriver.py" is in "lcd". "distance.py" contains codes for my distance sensor.
This is the ...
-1
votes
1answer
43 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 ...
1
vote
1answer
44 views
While loop picking up button press twice with gpiozero
good morning! I've been working on some python (pretty new to the language) to control some buttons and LEDs utilising gpiozero and I've run into a few issues which I've been trying to troubleshoot ...
-1
votes
1answer
45 views
TFMini Plus LiDAR not working
I'm trying to work with a Benewake TFMini Plus Lidar sensor in a RaspberryPi. I'm using a USB-2-TTL serial adaptor, which is working properly according to the tests I've ran.
I'm testing the sensor ...
0
votes
1answer
19 views
Raspberry pi failing to take still
I am developing my remote camera robot with flask on raspberry pi zero w. Where is mjpg-streamer used for video stream and picamera python lib used to take high resolution stills. And I having very ...
2
votes
2answers
73 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
62 views
How to execute a Python 3 + OpenCV 4 script @reboot on Raspbian Lite (headless)?
The Python script works perfectly fine when ran from the command line while signed in as the "pi" user, with this command:
python3 /home/pi/www/main.py &
But from the crontab, it just doesn't ...
0
votes
0answers
15 views
time.time() taking a big jump after initial boot up [duplicate]
I have a Python3 program that is constantly using time.time() to measure elapse time of each loop in the program to drive a real time plot. When I run this program normally either from a terminal ...
3
votes
1answer
243 views
Open a Folder in the File Manager by a Python Script
I would like to open a specific folder (not a file) in the file manager by pushing a button in a Tkinter frame. Does anyone know the function?
1
vote
1answer
53 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 ...
0
votes
0answers
44 views
Can't connect waveshare hat to raspberry pi 3b via python3 to obtain gps
I'm stuck with my waveshare hat and it would be cool if you could help me.
I would like to obtain the gps location.
I'm a python beginner and tried to use some already written code from this websites:...
0
votes
0answers
21 views
Why i can't write OBD 2 value of a car to firebase?
Hello guys im having a problem sending a value to firebase
here's the code that i use
import obd
connection = obd.OBD("/dev/ttyAMA0")
while True:
cmd1 = obd.commands.RPM
response1 = ...
0
votes
0answers
56 views
Tkinter no display error
I'm using Tkinter and running into the next error:
Traceback (most recent call last):
File "TKtest.py", line 3, in <module>
master = tk.Tk()
File "/usr/lib/python3.7/tkinter/__init__.py", ...
1
vote
1answer
48 views
Using GPIO from my virtualenv
I have a project I am developing with python3. I would like to add some status LED functions to it.
If I am not root everything is fine, my activated virtualenv is all good, but I cannot use GPIO (...
0
votes
1answer
88 views
Azure IoT Hub/Services with Raspberry pi in python
I have been googling how to connect raspberry pi 4(with and without buster) to Azure IoT using the python SDK and found somethings but they are not clear as they should be for a beginner like me who ...
0
votes
1answer
39 views
Turn On/Off 3D printer projector with Python/GPIO
There are similar questions but I don't want to turn on the LED but the 3D printer projector(NQM Plus Light engine) for the image projection.
The pins that I wanted to use are shown in the picture.
...
1
vote
1answer
51 views
Get time in microseconds (a 8 digit number) in python3
I am converting an Arduino code to python3. I am trying to read data from IMU 9250 sensor from the I2C interface of raspberry-pi. I am facing issue with the timing libraries of raspberry-pi and ...
2
votes
1answer
50 views
Installing pip3 mysqlclient results in error
I have tried a few different ways to get this installed. mysqlclient and also tried pip install MySQL-python both result in error.
pi@raspberrypi:/ $ pip install MySQL-python
Looking in indexes: ...
2
votes
1answer
113 views
Raspberry Pi 3 B+ (Buster) can't control Dynamixel AX-12A with Raspberry Pi 3 B+ (Buster) with half duplex communication
I have a project to make mobile robot with Dynamixel AX-12A as the wheel, so i changes the AX-12A to Wheel Mode with CM-530 and it works well.
I follow the guide from http://www.oppedijk.com/robotics/...
0
votes
0answers
27 views
VOIP phone dialer
What would the best way be to connect to my PBX or to dial a number to PBX?
I'm really lost where to start. looking to use python3 with some softphone maybe
0
votes
1answer
50 views
Is there a way i can view RPI screen to VNC on Raspbian lite
i have a problem where i need to view my running python GUI app (Kivy) to VNC. The app is running on the 7" RPI screen and i am using raspbian lite (no desktop), i used raspi-config to enable VNC but ...
0
votes
0answers
40 views
How to create a person or head (not face) detection using open CV that are not too slow when run in Raspberry Pi 3B+?
Hello guys my problem is creating a program that can detect the head(not face) or human detection for my project
One of the program that i see is too slow for raspberry pi 3B+ which is this : https:/...
1
vote
1answer
140 views
Reliable temperature/humidity logging with Python and a DHT11
There are more than 100 questions on this site concerning DHT11 or DHT22 sensors and I have used these with Python and c code using various libraries.
None that I have tried seem to give reliable ...
0
votes
0answers
54 views
Raspberry Pi 3B+ successfully connect and pair but can't receive data from OBD II
Hello guys my problem is i cant recieve any data from OBD II to Raspberry Pi 3B+
Here the materials that i use:
Raspberry pi 3B+
ELM327 -> OBD II
Operating System of Raspberry Pi -> https://medium....
0
votes
0answers
34 views
Nano Color Syntax for Python3
Currently if I use nano to edit a file with a .py extension nano will recognize it as a Python file and will color the syntax, but for Python 2. Is there anyway for nano to color syntax to Python3 ...
0
votes
0answers
126 views
Can't get OpenCV up'n'running in Raspberry Pi, what should I do? (details in the description)
I followed the whole tutorial (https://www.deciphertechnic.com/install-opencv-python-on-raspberry-pi/) line by line, but at the end when I imported the OpenCV library in Python CLI, it gave this error:...
0
votes
0answers
54 views
How do I read all registers of an INA219 sensor via SMBus in Python at once?
I'm trying to Connect my Raspberry Pi 3B+ with a Raspbian 10 to an INA219 current sensor (that also returns voltage and a premultiplied power) via SMBus in Python 3.7. After destroying one Raspberry ...
0
votes
0answers
54 views
how covert pyaudio sample rate 44100 to 16000 sample rate in Raspberry pi3 b+
Here I have provide the code which was working properly before but suddenly its stop working. But if I change the sample rate 16000 to 44100 its working. But i am not able to understand what exactly ...
1
vote
1answer
157 views
imutils VideoStream(src=0) return VIDIOC_QBUF: Invalid argument in raspberry pi
I am only doing a simple code in my Raspberry Pi 4:
from imutils.video import VideoStream
# initialize the video streams and allow them to warmup
print("[INFO] starting cameras...")
webcam = ...
1
vote
3answers
72 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?
@...
