Product parameters:
Size: 41.5mm (length) *19mm (width) *15.3mm (height)
PCB color: black
Supply voltage: 2.5V-6V
Support I2C protocol
With backlight, you can set whether to have backlight through the jumper cap. Plug in the jumper cap to bring the backlight, unplug the jumper cap to cancel the backlight;
The contrast can be adjusted by the blue potentiometer, clockwise to increase, counterclockwise to decrease. The potentiometer is designed on the front, which is convenient for customers to adjust freely;
Device address: It can be modified by short-circuiting A0/A1/A2, and the default address can be detected by program.
Address modification instructions: (take the default address 0x27 as an example)
A0, A1, and A2 are all floating, and the device address is 0x27
Short circuit A0, the device address is 0x26
Short circuit A1, the device address is 0x25
Short circuit A2, the device address is 0x23
A0, A1, and A2 are all short-circuited, and the device address is 0x20
Wiring instructions:
GND: negative system power supply
VCC: system power supply positive
SDA: IIC data cable
SCL: IIC clock line
