User's Manual

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VCC
GND
Positive reference of module power supply, voltage range: 2.3v ~ 5.2v DC
Ground
NC
GND
NC
Ground
NC
NRST
NC
NC
GND
GND
ANT
GND
Ground
Ground
Antenna
Ground
4 Connect to MCU
No.
Description
（
STM8L MCU
）
1
2
The UART module is TTL level.
For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
Shanghai Smart Control Co., Ltd.
8