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

I observed this problem with Python 2.7 win7 x64, and PySerial 2.5 installed automatically from easy_install.exe

The problem is not there with PySerial 2.4, so if your code is compatible with 2.4, just use that one instead and the problem is solved. Notice that you have to use pywin32 also, and chose the version that correspond to your python (e.g. pywin32-216.win-amd64-py2.7.exe).

See also https://sourceforge.net/tracker/?func=detail&aid=2921959&group_id=46487&atid=446302%5D2921959