Store variable data and display sum after 60 seconds

[the_dude]

Hi @menator01 Your code has really helped me out. I can take readings until the 60 second mark but then it throws me this error-

Traceback (most recent call last):
File "****.py", line 19, in <module>
print(sum(mynums))
TypeError: unsupported operand type(s) for +: 'int' and 'str'

Any idea what might be causing that? I've tried converting runtime to a float with all types of different formatting but that hasn't worked.

Updated code below:

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))

I'm not familiar with using serial but, you may be able to do something like

mynums = []

while True:
    # Code .........
    mynums.append(runTime)

print(sum(mynums))