I tested the board with a multimeter’s buzzer and found that both As are connected together and both Bs are connected together (see the datasheet for As and Bs). So all you need is:
H1 –> 5V, A1 –> 5V, GND –> GND, B1 –> Microcontroller’s input
I tested the board with a multimeter’s buzzer and found that both As are connected together and both Bs are connected together (see the datasheet for As and Bs). So all you need is:
H1 –> 5V, A1 –> 5V, GND –> GND, B1 –> Microcontroller’s input