This backpack provide SPI/I2C serial interface to the otherwise parallel 16x2 LCD. There is a switch on the board to select which communication mode we can use. A potentiometer is provided to adjust the backlight. Also, an ON/OFF switch is provided.
Interface:
There is a switch on the board to select which mode we can use.
I2C:
- 5V to Arduino 5V pin
- GND to Arduino GND pin
- SCL to Analog #5
- SDA to Analog #4
SPI:
- 5V to Arduino 5V pin
- GND to Arduino GND pin
- SCL to Digital 2
- SDA to Digital 3
- LAT to Digital 4
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