I have two RCT-DCx units
They are connected over network (LAN) not with rs465
I found that On master unit
0x0BA16A10;40 wifi.sockb_protocol = 1
On slave unit
0x0BA16A10;40 wifi.sockb_protocol = 2
0x7DDE352B;453 wifi.sockb_ip is IP of Master
0x6D7C0BF4;384 wifi.sockb_port is 8899