Screens may come with different I2C addresses, trying these addresses should help : 0x27 or 0x3f If your display still does not work : Use testing mode in order to show "hello world" on the screen at ...

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