Uart3; Useful Application - Quectel M10 User Manual

5.6. UART3

Module provides two UART ports for achieving Dual UART. One is UART1 which is the main UART; the
other is UART3 which is the assisted UART.
AT+QEAUART=1 is used to enable UART3. For more details, please refer to chapter 7 in document [5].

5.7. Useful Application

If the module has been welded on your PCB, you can follow the steps below to connect the module with
our EVB. After that, URAT communication is ready.
Remove the resistance R102 to the place of the resistance R224 to change the power supply.
Pull out the module pins of TXD, RXD, VBAT, and GND to the EVB pins of TXD, RXD, VBAT, and GND
with 4 wires. Short-circuit the power key to GND for 1s and cut down the connection to run the module.
M10_EVB_User_Guide
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M10 EVB User Guide
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