ublox-baudrate.py

import serial

ser = serial.Serial(
    port='/dev/ttyACM0',  # adjust to your setup
    baudrate=230400,      # old baudrate
    parity=serial.PARITY_NONE,
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS
)

if not ser.isOpen():
    print("Failed to open serial port")


# https://content.u-blox.com/sites/default/files/products/documents/u-blox8-M8_ReceiverDescrProtSpec_UBX-13003221.pdf?utm_content=UBX-13003221
# 31.3.1.1 Set protocols and baud rate  Page 178
# NMEA checksum calculator: https://www.meme.au/nmea-checksum.html
ser.write(b"$PUBX,41,1,0007,0003,9600,0*10\r\n")
ser.close()
print("ok.")