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Which are the minimum connections I have to make between Arduino UNO and the LCD screen. The TFT screen plugs right on top of your Arduino Uno. I have a "cheaper" model with the same size screen and identical pins as your screen (exact same text printed beside the pins). Before you plug it in, I have a few pieces of advise. It's possible to install the ...


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You're using an invalid variable name (1cd starts with the number 1). Variables can consist of both uppercase (A-Z) and lowercase(a-z) letters. Variables can contain numbers 0 to 9, but cannot start with a number. Variables may not have the same names as Arduino language keywords, e.g. you cannot have a variable named float. If you try and save a sketch ...


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stick to one type of variable, to prevent mix-up So if you stick to a byte (uint8_t) type for keypad: uint8_t keys[4][3] = { {1,2,3}, {4,5,6}, {7,8,9}, {0xF,0xA,0xB} // F-* B-# } then you can save it to your EEPROM as a byte and read it as a byte.it will prevent mix-up. your code which you are not displaying (everybody here can ...


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