Originally Posted By: mlord
.. are those the same ones also being driven by the USB serial chip on the board?


I just had a look at the schematic, and yes, they are. You will need to cut the trace at JP4 to be able to use the WT32i serial port directly (non-USB).

Just run a very sharp knife between the two solder blobs there to cut the thin copper trace. This will deny power to the USB-serial chip.