XM-15B Bluetooth serial port module master-slave integration Compatibel Arduino HC-05 HC-06

Need to support IOS, Android (no limit system version number), Windows system, please choose XM-26B Bluetooth 4.1 dual mode serial port module



Bluetooth module <===> MCU

CE/CLR <===> MCU-GPIO can be disconnected (module power switch, high-on, low-off, built-in pull-up resistor, can be left floating)
VCC <===> External power supply (3.0~6V)
GND <===> GND is connected to the GND of the microcontroller
TXD <===> MCU-RX MCU UART data receiving pin
RXD <===> MCU-TX MCU UART data send pin (compatible with 3/3.3/5V)
STATE <===> MCU-GPIO can not be connected (used to judge the current module running status, the same as the LED display)
Note:
The state of the XM-15B module operation (STATE),
1 jump: the module is in search or waiting to be connected
2 fixed high (LED is always on): has established a connection with the pairing module
?

3 fixed low (LED does not light): shutdown