Problem Statement: I am facing difficulties establishing communication between my Arduino board and a Python script running in Jupyter Notebook. The Arduino board responds correctly when communicating via the Arduino IDE, but does not respond at all when running the Python script in Jupyter Notebook.
Description: I have a Python script that communicates with an Arduino board via serial communication. The script sends signals to the Arduino to control LEDs and a buzzer. When running the script in Jupyter Notebook, the Arduino does not respond, even though the same script works fine when executed in the Arduino IDE.
Troubleshooting Steps Taken:
Verified the correct serial port and baud rate settings in the Python script.
Checked permissions to access the serial port in the Jupyter Notebook environment.
Restarted the Python kernel in Jupyter Notebook.
Tried running Jupyter Notebook with administrative privileges.
Added debug statements throughout the Python script to narrow down the issue.
Ensured there are no conflicts with other processes accessing the serial port.
Checked USB connection, and power supply, and reset the Arduino board.
Request for Assistance: I'm seeking guidance on how to troubleshoot and resolve the communication issue between the Arduino board and the Python script running in Jupyter Notebook. Any insights, suggestions, or alternative approaches would be greatly appreciated.
A Huge Thanks, I finally made it, and my project is saved thanks to your solution,
Steps that we made:
Identifying the Available Ports: We began by identifying the available serial ports on your system using the serial.tools.list_ports.comports() function. This helped us determine which port your Arduino was connected to.
Selecting the Correct Port: We created a function selectArduino() to interactively select the Arduino port from the list of available ports. This function allowed you to choose the correct port your Arduino was connected to.
Configuring the Arduino Communication: We then created a function configureArduino() to initialize the serial communication with the Arduino. This function opened a serial connection to the selected port at a specified baud rate.
Listening to Arduino Messages: We implemented a function listenToArduino() to continuously listen to messages coming from the Arduino. This function read characters from the serial port buffer and added them to a message buffer until it encountered a newline character (\n), indicating the end of a message.
Handling Local Messages: We created a function listenToLocal() to listen for local messages (input from the Python script). This function continuously read input from the standard input (stdin) and added the messages to a local message queue.
Configuring User Input: We configured a function configureUserInput() to start a separate thread for listening to local messages using the listenToLocal() function.
Main Code Execution: In the main code section, we called configureArduino() to set up the Arduino communication and configureUserInput() to set up the local message listening thread. We also printed "Arduino Ready" to indicate that the Arduino communication was successfully configured.
Sending Messages to Arduino: Finally, we sent a test message "Hello from Python" to the Arduino using the handleLocalMessage() function, which sent the message to the Arduino over the serial connection.
By following these steps and carefully configuring the Arduino communication and message handling, we were able to establish bidirectional communication between Python and the Arduino, allowing messages to be sent and received seamlessly.
Also, I forgot to mention that I installed all additional libraries on Arduino IDE that helps to establish communication via serial ports, after that my port was changed from '/dev/ttyACM0' to '/dev/ttyACM1', then I applied this code:
#!/usr/bin/python3
import sys, threading, queue, serial
baudRate = 9600 # or any other baud rate you want to test
arduinoQueue = queue.Queue()
localQueue = queue.Queue()
def configureArduino(arduino_port):
global arduino
arduino = serial.Serial(arduino_port, baudrate=baudRate, timeout=.1)
arduinoThread = threading.Thread(target=listenToArduino, args=())
arduinoThread.daemon = True
arduinoThread.start()
def listenToArduino():
message = b''
while True:
incoming = arduino.read()
if incoming == b'\n':
arduinoQueue.put(message.decode('utf-8').strip().upper())
message = b''
else:
if incoming != b'' and incoming != b'\r':
message += incoming
def handleLocalMessage(aMessage):
print("=> [" + aMessage + "]")
arduino.write(aMessage.encode('utf-8'))
arduino.write(b'\n')
def handleArduinoMessage(aMessage):
print("<= [" + aMessage + "]")
def listenToLocal():
while True:
command = sys.stdin.readline().strip().upper()
localQueue.put(command)
def configureUserInput():
localThread = threading.Thread(target=listenToLocal, args=())
localThread.daemon = True
localThread.start()
# ---- MAIN CODE -----
# Provide the port where your Arduino is connected
arduino_port = '/dev/ttyACM1'
configureArduino(arduino_port)
configureUserInput()
print("Arduino Ready")
# Your business logic goes here
# For example, sending a message to Arduino
handleLocalMessage("Hello from Python")
# To continuously check for messages
while True:
if not arduinoQueue.empty():
handleArduinoMessage(arduinoQueue.get())
if not localQueue.empty():
handleLocalMessage(localQueue.get())
, and then my script:
import serial
import time
# Initialize serial connection
ser = serial.Serial('/dev/ttyACM1', 9600)
# Define a function to send a signal
def send_signal(signal):
ser.write(signal.encode())
print(f"Sent signal: {signal}")
time.sleep(1)
# Send signal '1' to Arduino
send_signal('1')
# Wait
time.sleep(5)
# Send signal '0' to Arduino
send_signal('0')
# Close serial connection
ser.close()
, and now it's working.
WOO HOO!!!
Thank you so much for help.
I moved your topic to an appropriate forum category @OctaBot.
In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.
Your python code looks very much what I shared in my tutorial that you have been guided to.
It would have felt natural to expect that you kept the reference and attribution / MIT licence mention that is at the beginning of the code…
I also did not appreciate the chatGPT summary and mention of
Because you did not… that’s what the tutorial is about.
Seems you posted what you provided to your teacher which is basically a complete rip off of the tutorial and chatGPT generated summary of the code explanation…
Dear Jackson, 'we' I mean all who took part in this topic, this is my project which I am working on with my friend, I had a problem which again I described above. I was so excited that my problem was solved, and all I wanted was to share the steps that I had taken, I didn't want to waste my time on a full description with sources and documentation, just wanted to get back to my project as soon as possible so I used chatGPT to generate a path which I went through and solved the problem. (by the way, I removed the libraries that I have installed and the problem gets back to me). This gonna be a lesson to me. Thank you for providing your tutorial and shared with us.
