I'm having issues with mwlwifi driver and I want to report a log to find what is causing the problem...
The router sometimes locks-up or reboots... logging to an USB flash drive doesn't work because the log is stopped before the lock-up or reboot...
The only solution is to log via Serial cable... I don't have an USB TTL Serial cable, but I saw you can do with an Arduino Uno (which I have one)
My only concern is the Arduino is 5V and the router is 3.3V, I only need use the Ground and (router) TX -> RX (arduino) pins to receive the log... so this shouldn't be a problem? right?
I also have an Bi-Directional Logic Level Converter if 3.3V is really needed...
My concern I don't what to fry my expensive router...
Voltage pin isn't utilized on the WRT AC Series for the serial connection. Normally, the voltage pin would be used to supply voltage to the board without a power supply.
You may already know this, but if you don't, the Marvell driver for the WRT3200 has had issues since the WRT3200 was released when utilized on non-OEM firmware. Have you compiled the most recent 88W8964 version from 2 week ago?