TX and RX inverted Ardusimple F9p UART

GPS / RTK / GNSS
1

I recently bought 2 Ardusimple modules, and after weeks of trying to get RTK without success, I decided to invert the TX and RX connections of the base and rover, and it worked!

but is this correct? because it is the opposite proposed by the documentation and the logic of UART ports

below my configuration , wiring and video:
https://youtu.be/31XM6Oo_KVM

the documentation shows this

esprtk-base2rover-simplertk2b-esp32-rtk-lowcost-rtk-
esprtk-base2rover-simplertk2b-esp32-rtk-lowcost-rtk-1710×1068 185 KB

zed 2
zed 21138×800 324 KB

Zed
Zed1254×800 326 KB

rover
rover838×842 159 KB

Processando: VID_20220318_121228.mp4…

2

Good info including wiring and setup available for Benjamin’s Dual GPS V1.4 board

Benjamin’s Dual GPS PCB v1.4
Forum thread
Oshwlab.com link

Ken

3
  • TX1: ZED-F9P UART1 TX
  • RX1: ZED-F9P UART1 RX
  • TX2: XBee UART TX (this pin is also connected to ZED-F9P UART2 RX).
  • RX2: XBee UART RX (this pin is also connected to ZED-F9P UART2 TX).
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