I have upgraded the TIU and Handheld remote to V 5.
The MTH WIFI was also upgraded to V 1.2
I does connect to my home Wi-Fi without a problem.
But can not find the TIU, I have tray several 9-pin to USB adapter and cables.
I upgraded the TIU, using one of the 9-pin adapters that I have with out problem, so I do not think is the connection on the TIU.
Thanks