Hi guys,
A word from France...
I have same issue (no lan anymore) with this cam (Huisun) Yunch YC-HD785-20XA.
Today, on cam board, i found a RX port and perhaps TX port. (picture joined : It's JP9 middle pins are TX (#2 i think) and RX (#3) ; Ground is #4 ; I take Ground on other pin linked on...