I am testing XBEE3 with the mesh kit. Everything works in terms of sending and receiving messages, except for some confusion over two physical pinouts, XBEE_TX (DOUT/DI013) and XBEE_RX (DIN/CONFIG/DI04).
When a sender router sends out an UART message wirelessly, I expect to probe the same message (with my digital oscilloscope) on the sender router's XBEE_TX (DOUT/DI013). Strangely the message wasn't probed on TX but Instead is capture on the XBEE_RX (DIN/CONFIG/DI04). How could a sender's message appear on the RX pin?
I'm not sure if there is an error in the documentation or perhaps a bug in the firmware.