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.
182
questions
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Sending an image captured using ov7670 using arduino and serially transmit it to python
I am working on using an ov7670 camera module with arduino uno,capturing the image frame wise and transmitting the image serially line by line of each frame to python for image processing, however i ...
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1
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34
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My issue is, 51:28: error: expected primary-expression before ')' token can someone give me advice or steer me to correcting my issue? Makes no sense [closed]
// notes in the melody:
int melody[] = {
};
// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
4, 8, 8, 4, 4, 4, 4, 4
};
//Constants:
const int ledPin = 2; //...
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1
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1
answer
31
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CircuitPython - how to connect Adafruit esp32 AirLift with Adafuit HttpServer - incompatible socket object
I am building a CircuitPython weather station based on Adafruit M4 board stacked with Adafruit ESP32 AirLift module. Both work fine together when it comes to making http calls (via Adafruit_requests ...
- 125
1
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0
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47
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Converting more strings from serial monitor to int arrays
I want to transfer 8 lists from a python script, via Serial Monitor to the Arduino. I can get the strings to Arduino and Arduino saves them as String array, but I can't change it to integer (it shows ...
-1
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1
answer
39
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Arduino Facial Recognition Locking System
I'm an extreme beginner in Arduino, so please forgive me if I'm asking basic questions. Essentially what I'm trying to create is a facial recognition locking system. I have experience with Python and ...
1
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1
answer
142
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What is the best (fastest and most robust) way to send messages back and forth between Python on a PC and an Arduino, over serial?
I am trying to communicate between a PC running Python using PySerial and an Arduino. The Arduino itself has a CAN shield, and is responsible for interfacing with a motor. My goal is for the PC to ...
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-2
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1
answer
94
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Serial communication between python and Arduino nano BLE sense 33 for running six DC motor
I am controlling six DC motors by varying their voltage. I have figured out the voltage required for each motor in python; now it's time to send this voltage through Arduino Nano BLE Sense 33 to run ...
-1
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1
answer
60
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Constantly Stream data vía Bluetooth to monitoring
I am using a Bluetooth module HC-05 to Stream data from Arduino to My computer. In they computer I am using a python script to receive
They specifications:
Baud rate: 9600
But I am getting an error. ...
1
vote
0
answers
614
views
ESP32 wifi server with multiple clients
I have a program where I configure my ESP32 as a server and it sent randomly generated data, the problem is that I can only connect 1 client at a time, what I want is that multiple clients can connect ...
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0
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1
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114
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Using pyFirmata with a 360° servo; how do I stop it?
I am testing out pyFirmata. I have a 360° servo, and know how to change its direction, but I dont't know how to stop it.
What command, like servo.write(), would work to make it stop moving until ...
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1
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1
answer
864
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Sending float values from Python to Arduino using Serial communication
I need to send an array of floating-point numbers from python to Arduino Mega. For that, I read many sources [this this this this this] this] and many more links for the same I referred. But unable to ...
- 147
1
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1
answer
144
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Pan and tilt bracket move to sound, control servo motors using microphone sound sensors
I'm trying to code the pan and tilt bracket to turn based on where I speak, I know how to move the servo motors, but I really need help with the sound sensing. This is the code I've got currently:
#...
- 19
0
votes
1
answer
39
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Controlling Arduino through python
How to set the registers of Arduino through python code to vary the sampling rate of Arduino?
Can we control Arduino through python?
- 21
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1
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275
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`time.sleep` in python script reading serial output causes erratic behavior
I am attempting to control the position of my computer's cursor using a potentiometer hooked up to my arduino nano. The arduino is running the following code:
int potPin = 3; // select the input ...
3
votes
2
answers
431
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get data from arduino using python
I am trying to read potential meter data from Arduino using python, with the program on Arduino as follows :
#include <cvzone.h>
SerialData serialData;
int sendVals[2];
void setup() {
...
1
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0
answers
148
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I can get arduino code/board to show voltage using analog input but not python/board
I am trying to simply read a voltage from a battery. I am able to work out how to do this using arduino code on an arduino board. (UNO)
When I try to do the same thing on a board using python the ...
Stu Sutcliffe
1
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0
answers
28
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Serial communication between Python & Arduino: [duplicate]
I need to transfer information between pyton script and arduino.
Data is always built like this "wheelbase:1000"
wheelbase can be another word and 1000 can be another value, : is always the ...
- 113
1
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0
answers
302
views
esp8266 wifi/ read serial data with python
I'm trying to read some serial (ADC) data from my esp8266 nodeMCU v3 over wifi using python.
I connected the esp on my local wifi and set it with fixed local IP using arduino IDE, but I couldn't find ...
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1
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1
answer
112
views
opencv reading the display and doesnot provide serial communication with arduino
I was creating a project where the following part of the code reads certain area of the display(which i screen shared from mobile)
import cv2 as cv
import numpy as np
from PIL import ImageGrab
import ...
- 13
1
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1
answer
97
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Arduino randomly stops sending data to python over serial
I want to send commands to Arduino over USB Serial from my python program and Arduino should send back received command to make sure data wasn't lost. However Arduino randomly stops sending data back. ...
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1
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1
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206
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How do I control a servo with python through an Arduino
I'm trying to make it so I can control 2 servos with data that I get from a python script that tracks my face.
I have found 2 libraries that do this:pySerial and pyfirmata.
Is one superior to the ...
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1
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0
answers
277
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Pyfirmata util.Iterator causes serial communications issues with more than one Arduino
I'm using two Arduino Megas in a project to read data from a bunch of analog sensors and then output PWMs on digital pins according to their value. These analog signals are also being plotted on a ...
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1
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253
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Arduino , python , pyfirmata , standard firmata
Is there a way to change arduino analog reference to EXTERNAL IN PYTHON using pyfirmata or any other library ?
Necessary Links : https://www.arduino.cc/reference/en/language/functions/analog-io/...
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2
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0
answers
27
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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 ...
- 21
0
votes
1
answer
35
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....
- 103
2
votes
1
answer
210
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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1
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1
answer
353
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(&...
- 161
0
votes
1
answer
912
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....
- 35
0
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1
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242
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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, ...
1
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0
answers
127
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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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1
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605
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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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2
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118
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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....
1
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1
answer
725
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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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1
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1
answer
167
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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2
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1
answer
94
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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 ...
- 121
2
votes
0
answers
52
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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
votes
0
answers
2k
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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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0
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38
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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 ...
- 11
1
vote
0
answers
95
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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1
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0
answers
127
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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0
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166
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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 ...
- 35
1
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1
answer
594
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 ...
- 11
1
vote
1
answer
313
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
vote
1
answer
2k
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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1
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1
answer
2k
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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 ...
- 111
0
votes
1
answer
448
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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0
votes
2
answers
85
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
vote
2
answers
240
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=...
- 39
1
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1
answer
604
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 = ...
- 11
1
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0
answers
167
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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