Hey there, i have a question: I used ther library a lot of times without any problems. No, i am building up a new board with a 20x4 lcd. first, i connected the lcd to the Arduino Uno, but i didn't connect any keys for input. Later, i wanna use normal keys with pullup_input, i did this before without any problems.
But after wiring the lcd, i would make a test for the wiring. I compiled my menu and uploaded it to the Arduino. The display doesn't work, there were no lettes on the display, only symbols.....
Then, i selected "No input required", and everything was working fine. Why that ?????
When i will connect the keys, and no key is pressed, it will be the same hardware!!!!
What happend here ?
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