Display: 4 lines x 20 characters
Backlight: Blue with white character color
LCD controller: HD44780
Pin Definition: VCC / GND /SDL and SCA
Contrast Adjust: Potentiometer
Backlight Adjust: Jumper
Default Address: 0x27 for PCF8574T chip; 0x3F for PCF8574AT chip
Working voltage: 5V







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