Pin Definition
No
Pin
Definition
Description
1
GND
GND
Ground
2
VCC
Input
3.0 ~ 6.0 V
3
RXD
Input
UART input
4
TXD
Output
UART output
5
BZ
Output
Module’s operation status
6
P2
Input
Pin2 for switching operation mode
7
P1
Input
Pin1 for switching operation mode
Product Size