" Where does setPinValue get valued? Where does parameter get valued? This code snippet does not provide enough information.
Your topic says "lcd.clear() doesn't work", but it looks more like it ought to say "lcd.clear() doesn't work because I don't call it".
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Thank You for the answers.
I bought a board with LCD and with 5 buttons already soldered to the analog input A0, int setPinValue is the value on the input. Voltage on the pin depends on which button is pressed. There are some parameters in the program, each parameter has a value. Using "up" and "down" buttons a parameter is chosen at first, then press "select" button and the value of the chosen parameter can be changed with the buttons.
Actually it works, but with rubbish from the previous screen. plus expected information.