Sequential Board Module Port PCF8574 IIC / I2C / TWI / SPI Interface Module 1602 LCD Display
Support I2C protocol
The contrast can be adjusted by turning the clockwise and counterclockwise weakening blue potentiometer. Potentiometer movement design and customer convenience, freely adjust anywhere.
The module can be cascaded up to 8 cascades. Change the address of your device via / A1 / A2 Myopia Circuit A0. The default address is 0x27