Custom Enhanced series HMI optional IO expansion board experimental board

1. The IO expansion board belongs to the enhanced series HMI optional kit and is not standard, so it needs to be purchased separately. Please be aware!

2. Only enhanced and above series support extended IO, while basic models do not support extended IO.

3. Please refer to the enhanced sample project directory in the standard documentation package for application cases and schematic materials of the expansion board.

1. The 6 buttons on the interface respectively bind the 6 buttons on the expansion board

2. The left and right keys control the volume of the buzzer, and the up and down keys control the brightness of the LED

3. The control of the buzzer and LED is achieved by setting the PWM duty cycle

4. This instance does not require the participation of a microcontroller