LCD 1602 With I2C

The same 16x2 text display with a PCF8574 I2C adapter soldered to the back, which changes it from a six-wire job into a two-wire one. Connect SDA and SCL and you are done — no contrast potentiometer to fiddle with either, since that adjustment moves onto a small trimmer on the backpack. For any project with several modules competing for pins, this is the version to buy. Multiple I2C devices share the same two pins. Only two pins needed, SDA and SCL; Shares the I2C bus with other modules; Onboard contrast trimmer, no external potentiometer; Adjustable I2C address for multiple displays