AUX-RX/TX pins are auxiliary UART pins designed to help developers monitor and debug Notecard applications.
Enabling AUX-RX/TX
By default, the AUX-RX/TX pins are disabled to prevent unnecessary power draw when not in use.
In order to enable AUX-RX/TX, the AUX-EN pin must be jumped to the Notecard logical high voltage. On Notecarrier boards, you can jump AUX-EN to VIO>.
The use of AUX-RX/TX are not recommended for deployed applications, especially if they are battery powered. The auxiliary UART requires more power than the UART on the RX/TX pins.
Auxiliary Serial Communications Config
To communicate with the Notecard using the auxiliary UART, configure your serial device as follows:
| Baud Rate | 115200 (bits/second) |
| Data | 8 bit |
| Parity | none |
| Stop bits | 1 bit |
| Flow control | none |