02 Microbit talks to PC via Serial and Python

Have your Microbit talk to your PC/Laptop/Raspberry Pi etc. using a serial connection over USB. Coded using Python.

[deanpaul]

Thanks very much for this mate, going to convert it now to do accelerometer data, you’re a life saver 👍

[christinecarew]

Thanks Pauric, these videos are very useful. Very clear and easy to follow. Thanks for taking the time to create them.

[paulmulvey]

Pauric, I'm getting garbled data from the microbit in both Thonny and Teraterm (terminal program). This is happening on two different PCs. The serial monitor in Makecode works fine.

[kmhooibg]

# Import Libraries
import serial
import time

# Set up the Serial connection to capture the Microbit communications
ser = serial.Serial()
ser.baudrate = 115200
ser.port = "COM9"
ser.open()

# Loop forever
while True:

# Read in a line from the Microbit, store it in variable 'microbitdata' as a string
microbitdata = str(ser.readline())

# Print the returned unique ID from Firebase on receipt of our data
print(microbitdata)

Error msg: SerialException: could not open port 'COM9': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)

error opening port, but I checked the port, it's correct

[jacobstech]

is it almost the same that send from computer to microbit?

[DownhillAllTheWay]

Using PuTTY (terminal emulator) in the PC, I am able to send strings and numbers from the Micro:bit )language = Makecode) and display them in the PC screen - but they all come out in one, long line. How can I send a CR or NL character (Carriage Return / New Line)

[alfredundheim]

Doing all exactly as you did it, same micro:bit code and java code. Copied from your GitHub, but got these error codes:

Traceback (most recent call last):
File "D:\Apps\Thonny\Project Files\Microbit input.py", line 9, in <module>
ser.open ()
File "D:\Apps\Thonny\lib\site-packages\serial\serialwin32.py", line 62, in open
raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))
could not open port 'COM13': FileNotFoundError(2, 'Systemet finner ikke angitt fil.', None, 2)



Anyone who now what I can do?

[littlepiggames]

[Running] python -u
Traceback (most recent call last):
File programs\microbitsender\microbutton.py", line 9, in <module>
ser.open()
File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\serial\serialwin32.py", line 64, in open
raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))
could not open port 'COM13': FileNotFoundError(2, 'El sistema no puede encontrar el archivo especificado.', None, 2)

[Done] exited with code=1 in 0.145 seconds