- Characters cannot be displayed
- Please make sure you have downloaded the correct library and the Grove wire is connected to the I2C Port.
- The working voltage of Grove - LCD RGB Backlight is 5V. So switch to 5V power while you are using Base shield V2.
2. How to adjust the contrast
- R7 on the back can be used to adjust the contrast. When it's replaced by a larger resistor, the back-base color will become more light.