pyserial - How to read the last line sent from a serial device

Question

I have an Arduino connected to my computer running a loop, sending a value over the serial port back to the computer every 100 ms.

I want to make a Python scr

Answer 1

This method allows you to separately control the timeout for gathering all the data for each line, and a different timeout for waiting on additional lines.

# get the last line from serial port
lines = serial_com()
lines[-1]              

def serial_com():
    '''Serial communications: get a response'''

    # open serial port
    try:
        serial_port = serial.Serial(com_port, baudrate=115200, timeout=1)
    except serial.SerialException as e:
        print("could not open serial port '{}': {}".format(com_port, e))

    # read response from serial port
    lines = []
    while True:
        line = serial_port.readline()
        lines.append(line.decode('utf-8').rstrip())

        # wait for new data after each line
        timeout = time.time() + 0.1
        while not serial_port.inWaiting() and timeout > time.time():
            pass
        if not serial_port.inWaiting():
            break 

    #close the serial port
    serial_port.close()   
    return lines