5PCS IIC I2C Serial Interface Board LCD1602 LCD2004 Blue Backlight LCD Display Adapter Plate PCF8574 Expansion Board for Arduino UNO R3 MEGA DIY Kit

I have already used two of these that I purchased earlier on two other projects. I have a water valve control project that will need at least one more display but I ordered the five pack so I would have extras. I am always needing a debug display of some kind usually on the fly during project development. Any way, these are great, Just load and initialize the liquidCrystaiI2c library and you are set to go.

So far all the boards are working fine.