1602A LCD Module:
Working voltage is 5v
Size si 80*36*7mm, weight is 32g
With 16-pin interface
White Character Blue Backlight
Displays 2 X 16 characters or 32 characters

IIC Module Parameters:
1. Size: 41.5mm (length) * 19mm (width) * 15.3mm (height)
2. Weight: 5g
3. PCB color: Black
4. Power supply voltage: 2.5-6V
5. Supports I2C protocol
6. With backlight power control, you can set whether to connect the backlight power supply through the jumper cap. Insert the jumper cap to connect the backlight power supply, remove the jumper cap to disconnect the backlight power supply.
7. The contrast can be adjusted, rotate the blue potentiometer to increase clockwise and decrease counterclockwise. The potentiometer is designed on the front, making it convenient for customers to adjust freely anytime and anywhere.
8. Modules can be cascaded up to a maximum of 8. Modify the device address by short circuiting A0/A1/A2.
9. The default address of the I2C adapter board is 0x27.
Wiring instructions:
GND: Negative pole of power supply
VCC: Positive pole of power supply
SDA: IIC data line
SCL: IIC clock line