I bought RENFELL UART RS232-4W IoT card (0107-03-R2.1) and inserted it to IoT slot#0 on mangOH green.
I confirmed that WP76 module can detect this card by “dmesg | tail –n 22” command. But UART#1 did not work on IoT slot#0. Please let us know the correct procedure to activate UART#1 on IoT slot#0.
When I inserted Ether IoT card, it is working fine.
To confirm UART#1, I set AT!MAPUART=4,1 and am checking whether WP76 module can output NMEA message.
Should I use Mux control? https://github.com/mangOH/MuxControl