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.
189
questions
-1
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1
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63
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Reading serial data from Arduino in Python continually
Using a stepper motor and a range finder (TFLuna), I am trying to build a "Lidar" (like a Radar, but with light). Here is the algorithm:
Turn motor one step, calculate angle, measure ...
- 101
0
votes
0
answers
20
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Receives data from Light sensor with ISR
I use a laser module (HW483) to transmit a series of 0 or 1 data and Light Sensor Photosensitive(LM393) utilizes ISR to receive data and its digital pin as output. On the transmitter, I use the ...
- 1
0
votes
0
answers
36
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Python program can read but not write on serial monitor
I'm trying to write a small python program to communicate with my Arduino board but, somehow, I'm having a little trouble.
My goal is to switch on and off a LED by interacting with the desktop program ...
- 11
0
votes
1
answer
70
views
Python script cannot connect to serial port
I want to control the LEDs with my hand, for this I used the repository https://github.com/paveldat/finger_counter/tree/main. I want to control the LEDs with my hand, for this I used the repository. ...
2
votes
1
answer
48
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Micropython installation on Arduino nano
I am currently trying to use micropython on an arduino Nano 33 BLE using MacOS. Following the instructions from arduino website I was able to complete steps 1-3. At step 4, I can find the bossac file ...
- 21
0
votes
1
answer
42
views
How to fix UnicodeDecodeError when using Serial.println
I am using an Arduino Uno R3 to send instructions to a serial monitor in a Python program with Serial.println. But when I send a specific line, I get a a UnicodeDecodeError.
The line in the Arduino ...
- 107
3
votes
1
answer
134
views
How to ignore garbage values in serial communication between arduino and python
I have arduino uno. I am trying to send and receive serial data from arduino to python. I have usb to uart converter. I have connected its tx to rx of Arduino and rx to tx of Arduino and gnd is ...
- 183
4
votes
1
answer
380
views
ESP32 SocketIO Client is not connecting to Flask-SocketIO Server
I'm trying to connect a ESP32 client using SocketIO with a Flask-SocketIO server and it's not getting connected.
The server uses SSL. The local server address is https://192.168.1.137:3000.Is the ...
- 153
2
votes
0
answers
80
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Connecting Arduino Mega 2560 to Python with PyFirmata
I am currently controlling two servos using the Arduino IDE, but now need to integrate my Arduino code into a Python script. I read about how to use PyFirmata and went through the process of uploading ...
1
vote
1
answer
78
views
Sending values with pyserial does not function if there is also sensing on Arduino Due
I'm using an Arduino Due to make a feedback loop using python, but this does not seem to function. The python code I'm using is the following:
from serial import Serial
board = Serial('COM11',9600)
...
- 19
2
votes
0
answers
228
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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 ...
- 29
1
vote
1
answer
141
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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
vote
0
answers
87
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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
vote
1
answer
661
views
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 ...
- 13
-2
votes
1
answer
177
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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
votes
1
answer
89
views
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
1k
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 ...
- 11
0
votes
1
answer
229
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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 ...
- 11
1
vote
1
answer
1k
views
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
vote
1
answer
311
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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
51
views
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
1
vote
1
answer
508
views
`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
724
views
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
vote
0
answers
223
views
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
vote
0
answers
29
views
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
2
votes
0
answers
440
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 ...
- 21
1
vote
1
answer
171
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
vote
1
answer
161
views
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. ...
- 21
1
vote
1
answer
294
views
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 ...
- 11
1
vote
0
answers
454
views
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
vote
1
answer
332
views
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/...
- 11
2
votes
0
answers
38
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 ...
- 21
0
votes
1
answer
40
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
262
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 ...
- 135
1
vote
1
answer
656
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
2k
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....
- 135
0
votes
1
answer
312
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, ...
- 145
1
vote
0
answers
159
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 ...
- 11
-2
votes
1
answer
823
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 ...
- 19
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votes
2
answers
208
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....
1
vote
1
answer
942
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 ...
- 21
1
vote
1
answer
208
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 ...
- 21
2
votes
1
answer
112
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 ...
- 121
2
votes
0
answers
54
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
votes
0
answers
2k
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 ...
- 21
1
vote
0
answers
45
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 ...
- 11
1
vote
0
answers
135
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 ...
- 11
1
vote
0
answers
150
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(...
- 51
1
vote
0
answers
190
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 ...
- 135
1
vote
1
answer
955
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