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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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