How can I fix “[Error 6] The handle is invalid.” with PySerial

Question

I\'m trying to connect to my phone from my Windows 7 PC using PySerial with the following code:

import wmi
import serial

c = wmi.WMI()
modem = c.query(\"SEL         


        

Answer 1

This happened to me too and it was actually due to the serial port being closed when I tried to access it. This is because I was using a 'with' structure which makes sure to close the port afterwards and a bad code refactoring lead to this issue.