![]() I would go back to this condition and start from there. If you have it working on UNO, then it should work on Mega with no changes. That works with the older library by Malpartida on the Uno I know my pin numbers for the backpack, they are 2,1,4,5,6,7,3. you can't have more than library that has a LiquidCrystal_I2C.h header file installed So when you install another library you must make sure to remove any previous library. They cannot coexist and can step on each other toĬreate an environment where nothing works or things behave strangelyīecause you can end getting parts of one library and parts of another.
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