Uart Interfaces - Quectel BG96 Manual

3.10. UART Interfaces

The module provides three UART interfaces: UART1, UART2 and UART3 interfaces. The following are
their features.

UART1 interface supports 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 230400bps,
460800bps and 921600bps baud rates, and the default is 115200bps. It is used for data transmission
and AT command communication.

UART2 interface supports 115200bps baud rate, and is used for module debugging and log output.

UART3 interface supports 115200bps baud rate, and is used for outputting GNSS data and NMEA
sentences.
The following tables show the pin definition of the three UART interfaces.
Table 11: Pin Definition of UART1 Interface
Pin Name Pin No.
DTR 30
RXD 34
TXD 35
CTS 36
RTS 37
DCD 38
RI 39
NOTE
AT+IPR command can be used to set the baud rate of the UART, and AT+IFC command can be used to
set the hardware flow control (hardware flow control is disabled by default). Please refer to document [2]
for details.
BG96_Hardware_Design
I/O Description
Data terminal ready.
DI
Sleep mode control.
DI Receive data
DO Transmit data
DO Clear to send
DI Request to send
DO Data carrier detection
DO Ring indication
LPWA Module Series
BG96 Hardware Design
Comment
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
1.8V power domain
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