In one question in this forum , following ( generally an exception ) TX/RX connection between serial PC & ardusimple board UART2 was shown :
Is it really true ?
In our hookup guide we tried to summarize these connections: https://www.ardusimple.com/simplertk2b-hookup-guide/
I paste here:
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).
Don’t forget to connect IOREF to enable above pins.
Good info, maybe it could be stressed more in the hookup guide that the IOREF pin needs to be fed some voltage for these pins to work at all. I was not aware and thought my bluetooth module was faulty.
Thanks for the feedback.
We have updated the Arduino rails section in the hookup guide remarking the need of connecting IOREF if custom hardware needs to be used via UART1/UART2.