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I2C LCD Modules 16x2 and 20x4
Both modules operate and connect in the same way
Includes a ready-fitted I2C Module (backpack)
Use the potentiometer on rear to adjust contrast
Same wiring for both 2-line and 4-line displays
Only 2 data pins are required
Close-up of LCD Wiring
5V on Arduino to VCC on I2C backpack
Gnd on Arduino to GND on I2C backpack
A5 on Arduino to SCL on I2C backpack
A4 on Arduino to SDA on I2C backpack
Install the library files from
HERE
Load the demonstration sketch from below to test out the connections:
16x2 Module
20x4 Module