Questions tagged [python]

Python is a programming language. Use this tag for questions regarding how to use Python with your Arduino, or on using of pySerial or such software. Also consider using [programming] and other specific tags.

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26 views

Can you use python to control an RGB matrix with Arduino Mega?

I want to use python to control a RGB Matrix with an Arduino Mega, is it possible? How do I use Adafruit library with python? My plan is to create IOS app to control the matrix via Bluetooth.
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0answers
21 views

Initial setup print getting cut off from printing

I am writing a program in Python (using PySerial) that needs to read data from the Arduino quickly. For this reason I have set the serial timeout to 0.01 seconds. (Baud rate is 115k) If I don't set ...
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1answer
28 views

How to receive commands to a running arduino program from a raspberry pi?

I have looked all over for a solution to this. I'm a noob in the arduino space and am really just getting my feet wet. It's possible that I am interpreting what I am reading wrongly. If so I apologize....
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1answer
50 views

What is the difference when an arduino has been unplugged vs when a serial port connection was closed?

Using python code for a serial port connection to an arduino, it sends a value to the arduino, which then starts printing values to serial. The python code will print the value on the first or second ...
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1answer
43 views

How to use pyserial to write two separate message?

I'm using pyserial to communicate with my arduino. I set up the connection and everything works fine. Now I have these two writing commands: pyserial.write("conn".encode()) pyserial.write(&...
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1answer
41 views

Why do I need to use latin-1 instead of utf-8 when using python with arduino?

When reading and writing with a python serial port connection to arduino, if I don't use latin-1 ('ISO-8859-1'), the results are not as expected. Like if I have int outP = 5; //... int outV = Serial....
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0answers
37 views

Read Arduino Serial from python for ulterasonic real time

I have a problem with Arduino serial and Python. I want to read data from my Arduino via Python and plot it out in real time but I'm getting delayed results. This is the code running on my Arduino: ...
0
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1answer
56 views

5V pin out, 8 pins and micropython/circuitpython support: does such a board exist?

For a project, I am looking for a board to connect eight different neopixel-strips to, on eight different data pins. Because of the great length between the board and the first pixels of these strips, ...
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0answers
65 views

drifting serial readings

I have a python script that continuously reads the serial port for digital thermometer reading. After a period of time, the serial reading will drift by 10+ degrees in some cases. I let it run, I ...
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0answers
25 views

Computer freezes while collecting serial data from Arduino Uno

I am an arduino noob. I have been searching for some interesting arduino projects recently and making a game controller using Arduino UNO seemed interesting. So I hooked up two dual-axis joystick ...
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0answers
54 views

How can I control my Arduino with my computer? [closed]

I have an eye scanner python program on my computer and I want to make a motor, that is connected to an Arduino, move if it gets a certain signal. How can I make my python program in Pycharm/visual ...
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1answer
75 views

How to fix “expected primary-expression before '%' token” error code? [closed]

I'm trying to use this code to get temperature and humidity values from DHT11 sensor and send it to Python and I need to write the temperature and humidity values in the same line. But I keep getting ...
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0answers
26 views

Importing Arduino external data [closed]

I'm doing a project with my friends and I need to import some external data, which changes, to Arduino. I'm using python to use opencv, take photos and count the faces in that photo. And I need to use ...
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2answers
46 views

How can I execute a string in my Arduino Uno board?

I was making a project with Arduino Uno , It's working is like this it connects to a key pad and a 7segment display ,and when you press a run button connected to Arduino it should run the code written....
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1answer
92 views

ESP8266 SocketIOclient constant disconnect with Python WebServerSocket

I am writing a program that echos back the message sent to the web socket server on a host machine. When running the ESP module, the connection is established but immediately disconnects as seen in ...
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1answer
62 views

EEPROM programmer works with serial monitor but not with pySerial

I'm trying to modify Ben Eater's eeprom programmer to flash a 32K eeprom, since the arduino has 32K of program data total the data wouldn't fit in the program. So I wrote a python program using ...
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0answers
126 views

python spidev receive data from Arduino

I am trying to communicate between Arduino and raspberry pi over SPI. I am using spidev in python and sending data to Arduino using xfer2. But I do not have an idea of how to receive bytes from ...
0
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1answer
34 views

share enum between python and arduino

I have created a gui in python that allows an arduino controlled mecanum wheel cart to move around. The cart allows for 8 different move directions and can rotate left and right. Commands are sent ...
2
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0answers
43 views

Two LED Patterns Task Controlled by GUI

I am very new to Arduino and coding/programing. I set a task for myself to make a simple circuit of 5 LEDs controlled by pins 2, 4, 8, 11, 12. I want to be able to make two different pattern for the ...
2
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0answers
248 views

Reading JSON from Arduino over serial in python and writing to a JSON file on computer

I'm fairly new to Arduino so I used a sample code before integrating this into my main code. I'm printing my value in a JSON format over serial. My Arduino outputs this and the python receives this ...
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0answers
19 views

My servo wont follow my cam

So i am trying to make the servo follow my face which will end up my camera following my face But the servo isnt doing anything please look at this (Also im only using Horizontal because I would like ...
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0answers
33 views

Connect and detect multiple arduinos using firmata

i am trying to connect several arduinos to usb ports and have the abillity to define between them. i added Firmata.attach function on the arduino board. how do i call it from my python script? thank ...
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0answers
50 views

Arduino code equivalent for python code binascii.unhexlify command

I want to convert a hexadecimal string or an array of bytes to binary data. For example, if i have a string like '424D368403' my output should be like b'BM6\x84\x03' The python code binascii.unhexlify(...
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0answers
101 views

Change arduino output from input

I'm trying to change values such that the arduino uno outputs comes from what is input, with the code, int PinOutput = 11; int PinInput = A0; int inph; int inpl; int input; void setup() { // put ...
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1answer
98 views

wdt reset cause:4, boot mode:(3,6)

I'm working on Python and nodeMCU with websocket connection. So, I send a string from Python to nodeMCU and nodeMCU collects the string and decodes to set values to a stepper motor. Initial code ...
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0answers
44 views

Ultrasonic sensors not working

The target of this is for the system to print "Done" when distance, measured by 2 ultrasonic sensor, is between 6-17 cm. This is my python code: import serial arduinoSerialData = serial....
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1answer
103 views

Best way to ask Arduino for data from Python?

I'm trying to send numerical data from inertial sensors from my Arduino to a Python script via serial (PySerial). I found that if I continuously send the data from the Arduino without stopping, the ...
1
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1answer
64 views

Code for 2 ultrasonic sensors

This is my code: int trigPin=13; //Sensor Trig pin connected to Arduino pin 13 int echoPin=11; //Sensor Echo pin connected to Arduino pin 11 float pingTime; //time for ping to travel from sensor to ...
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0answers
97 views

Control Servo motor via Python GUI (PyQt) component “QDial”

I want to control a servomotor via a Python Gui (PyQt) component "QDial". Hopefully the servomotor should rotate "simultaneously" with the Dial in GUI. Below is the related code: ...
1
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1answer
643 views

Flash firmware with hex file over serial with Python (no avrdude, Arduino IDE)

I'm trying to make a Python function in the TCLab package to flash firmware to an Arduino Leonardo (32u4). I can compile the TCLab ino (firmware) and deploy with the Arduino IDE or with the Python ...
0
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1answer
128 views

Serial Read Data Loss With Arduino Nano

I am trying to use Serial reading from a python serial code (which is running on my Jetson Nano) in my project, but in some loop in my code, my data is receiving wrong. I use Serial.readBytesUntil() ...
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2answers
55 views

Arduino sends bad data ONLY when not connected at the launch my application

I'm trying to write a little sensor reading application with a light sensor attached to an Arduino, which writes the information from the sensor over serial. I have written a python program to read ...
1
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2answers
144 views

Debugging different serial receive / send behavior between Uno & Mega

I have a simple text parser (as a component of a larger project) coded up and seemingly working correctly. It parses a key-value delimited command like the following: <key1=value1;key2=value2;key3=...
1
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1answer
195 views

Can not receive data from Python code

I want to send 4 float numbers from Python code to an Arduino; I was trying to send it via serial and I have some problems. here is my Python code: import time import serial import struct data = ...
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0answers
55 views

serial problem with python to arduino

when i execute the python script, the arduino response but the code between the if(Serial.available()) not responding. python script import time, serial arduino = serial.Serial('COM7', 9600) ...
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1answer
31 views

Run servo when image is capture

I am trying to create a program when the camera capture the servo will rotate in 90 degrees continously, but my code will stop in print output 2 any idea to run the servo continously? Here's the Code ...
0
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2answers
3k views

Error 'exec: “python”: executable file not found in $PATH Error compiling for board AI Thinker ESP32-CAM.' in Arduino IDE 1.8.12

I am trying to upload a sketch to the ESP32-CAM board using Arduino IDE 1.8.12 and I get an error message: exec: "python": executable file not found in $PATH Error compiling for board AI Thinker ...
0
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1answer
1k views

Communication between Arduino and python: serial port sending empty data

Arduino code: this code is provided communication between sensor gy-521 and arduino. I read data by the command "1", after 1000 samples arduino is waited for new command for read data. Arduino code ...
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2answers
153 views

Can I run my python based virtual assistant using Arduino? [closed]

I have a working project which is python based virtual assistant and now I am thinking to make it more accessible than carrying my laptop. I want to make a device like alexa echo dot more or less.. ...
0
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4answers
63 views

How to link a computer processor to an Arduinno on a board? [closed]

I am completely new to Arduinno, so please forgive if the question is stupid. Here is the problem: I have a project where I want an Arduino (or similar microchip board) to handle some sensors and ...
0
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1answer
633 views

How to program Arduino LCD shield with Python?

so I want to run a Arduino LCD shield with Python code..But after having some research on the Internet, I can not found any tutorial, some just give some basic code with LED. And one things that how ...
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0answers
483 views

How to parse data most efficiently coming through mqtt with ESP8266

I am writing a program that is currently set up like so: Python script running on my computer. Raspberry pi is the broker for the mqtt data transmission An ESP8266 is programmed to listen to/...
0
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1answer
836 views

find out the pin numbers for the Arduino IDE for a certain board - the esp 32

I followed the tutorial I found here https://techtutorialsx.com/2019/03/29/esp32-arduino-controlling-a-dc-motor/ On the very interesting topic controlling a DC motor with the esp32 and Arduino I have ...
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0answers
982 views

Data logging from ESP32 through UDP socket to PC

The idea is to send raw sensor data from ESP32 to PC through WIFI UDP socket and store it into CSV file using Python. As you can see from the code I am chopping 8 bytes of data into single bytes and ...
1
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0answers
44 views

Multiple arduino connections problem

I have 2 Arduino Mega 2560 connected via USB to my Ubuntu 18.04 machine. When I boot, one connects to /dev/ttyACM0 and the other connects to /dev/ttyACM1. Communication works perfectly. However, ...
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1answer
134 views

Arduino IDE display DEBUG PORT Serial1 output

How can I display / capture Arduino IDE's Serial1 output? Can I display it using Arduino IDE or using a script in Python? This python script (courtesy of Chad G) works for the Serial: #!/usr/bin/env ...
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2answers
165 views

How Should I Send Data to My Laptop from Multiple Arduinos?

I'm working a project which involves reading multiple RFID tags, from multiple directions, at the same time. Because of the multiple directions, I need to use multiple antennae. Because of the ...
1
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1answer
743 views

Arduino communication protocol with python - beyond pyserial and Arduino example

TL;DR does someone know of a advance and reliable/redudent USB protocol for communicating between a raspberry pi and Arduino due (native port) I am trying to learn how to build a little robot which I ...
2
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1answer
75 views

The arduino can't seem to output correctly

i am a beginner at python and I am average at Arduino and I had the idea of using both of them together for a project. I have been trying to make a Arduino + Python car which I can control with my ...
1
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1answer
598 views

Running Python on Arduino

I've been using Python for quite long, and I was wondering if it can be used as a programming language for Arduino, rather than C/C++. When I'm using the Arduino IDE, the sketch is compiled into a ...