Store variable data and display sum after 60 seconds

[deanhystad]

This code doesn't make any sense.

import serial
import os
import time
 
mynums = []
 
if __name__ == '__main__':
    ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
    ser.flush()
 
    while True:
        if ser.in_waiting > 0:
            t_end = time.time() + 10
            while time.time() < t_end:
                value = ser.readline().decode('utf-8').rstrip() #reading from serial. It's a float 0.00 (second.milliseconds)
                runTime = (value) #convert variable to float.
                print(value) #prints variable result.
                mynums.append(runTime)
            print(sum(mynums))

Translating to Not Python

Repeat this
    If there is something in my serial port repeat this for 10 seconds.
        read the serial port.  Even if the read fails append the resuts to a list

Nobody has the code quite right yet. You should not be using ser.in_waiting() with ser.readline(). You can have bytes in the buffer but still be waiting for the newline character. Instead of peeking in the buffer just do the readline() with a timeout and check the length of the returned value.

import serial
import time
  
ser = serial.Serial('/dev/ttyUSB0', 115200, timeout=1)
ser.flush()

end_time = time.time() + 60
total = 0
while time.time() < end_time:
    value = ser.readline()
    if len(value) > 0:  # len() will be zero if readline() timed out
        print(value)
        total += float(value.decode())

print("Total", total)