I would like to feed RTCM data via Bluetooth to the Rover from my Phone. I can do this with the switches set in the default positions. I also need to supply my Tractor Autosteer system with NMEA Data via RS232 and I have the necessary max 232 wired to the proper connector. If I slide the Serial 1 NMEA connector to EXT Cntr I can get Data out the Data port but I can no longer use Bluetooth for RTCM data. I can send RTCM data thru the Radio port via rs232/max232 and get a RTK lock. Can I tap into that UART with the two holes above the word serial or is there something I missed?