1. Easy to use. Less I/O ports are occupied, only four - VCC, GND, SDA (serial data line), SCL (serial clock line).
2. Support the IIC protocol. The I2C LCD1602 library is provided, so you can call it directly.
3. With a potentiometer used to adjust backlight and contrast.
Power supply: +5V?
4. Address of the module: ox27.
Used to display Characters, letters and Numbers.
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