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Arduino 20x4 or 16x2 I2C LCD. Jump to bottom. Wotever edited this page Dec 17, 2018 · 2 revisions Warning, this LCD ... Try using the alternative I2C LCD library available in the setup tool. Wiring.

Reference circuit diagram of an Arduino-compatible LCD backpack is shown below. What follows next is information on how to use one of these inexpensive backpacks to interface with a microcontroller in ...