• UART2 and GNSS UART are internally connected so while using GNSS ensure that UART 2 is kept
as floating and vice versa.
3.6.4 Serial Port Application Circuit
The serial level is 1.8V.
The module's serial port baud rate can be set to 600 to 3000000bps baud rate and the default is 115200bps.
The UART1 serial port can realize
✓ AT interactive instructions
✓ Print program log information
✓ Interact with peripheral data
When users want to use the full-featured serial port, they can refer to the following connection methods
Figure 8 Full-featured serial port design
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