📺 HiLetgo HD44780 2004 LCD 20x4 2004A Character LCD Screen Display Module with Blue Backlight and IIC/I2C Serial Interface Adapter: Product Review and Features Review

There are complaints that this unit does not show anything on the display. Because the user is not aware that the output brightness has to be adjusted via the potentiometer screw on the back of the device. When trying to use the display for the first time, customize the display to your liking. Nothing showed up on my first try until the brightness control was changed.

Although all LCDs are basically the same, this model is matched to I2C backpack, which makes it very easy to use. Rather than requiring 4 serial lines (pins) plus power and a contrast potentiometer, the backpack offers communication over a 2-wire I2C connection and has a built-in contrast potentiometer.

Although all LCDs are basically the same, this model comes with an I2C backpack, making it very easy to use is. Rather than requiring 4 serial lines (pins) plus power and a contrast potentiometer, the backpack offers communication over a 2-wire I2C connection and has a built-in contrast potentiometer.

There are complaints that this device does not show anything on the display. Because the user is not aware that the output brightness has to be adjusted via the potentiometer screw on the back of the device. When trying to use the display for the first time, customize the display to your liking. Nothing showed up on my first try until the brightness control was changed.