backlight. The communication address defaults to 0x27.
The original 1602 LCD can start and run with 11 IO ports, but ours is built
with ARDUINOIIC/I2C interface, saving 9 IO ports. Alternatively, the
module comes with 4 positioning holes with a diameter of 3mm, which is
convenient for you to fix on other devices.
(2)Parameters：
◆ I2C address: 0x27
◆ Backlight (blue, white)
◆ Power supply voltage: 5V
◆ Adjustable contrast
◆ GND: A pin that connects to ground
◆ VCC: A pin that connects to a +5V power supply
◆ SDA: A pin that connects to analog port 20 for IIC communication
◆ SCL: A pin that connects to analog port 21 for IIC communication
(3)Components Needed:
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