Store variable data and display sum after 60 seconds

[deanhystad]

This is not a speed thing. Your laser engraving machine is not sending individual values separated by newlines. It appears to send 4 values at a time, and it doesn't look like there are any delimiters between the values. That is rather rude.

I would start by reading 1 value and seeing what is sent. Always start solving a problem by understanding what the problem really is. Does the engraver send 4 numbers at a time or is there something happening in the program that concatenates the strings (I don't see how).

import serial
 
ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
ser.flush()

while True:
    value = ser.readline()
    if len(value) > 0:
        print('Bytes', value)
        print('String', value.decode())
        break

Try running this and posting what is printed.