Ramps 1.4 and REpRapDiscount Full Graphic Controller

[cedvano]

Hi,

I would like to use the controller's potentiometer. But I tried all the pins but couldn't recover the slightest movement. In button or AnalogRead mode, nothing.

Do you have a sample code or did I miss something?

On the other hand, I can write well on the screen, so the connection is ok.

Thank you in advance.

[groundFungus]

The only potentiometer on the board is the LCD contrast control.

If you mean the control on the red circle, it is not a potentiometer. It is a rotary encoder.

The encoder A pin is connected to EXP2 plug pin 5, the encoder B pin is connected to EXP2 plug pin 3 and the switch is connected to EXP1 pin 2.

Note: The encoder board used in the examples has pullup resistors installed. The display board does not have those resistors so the internal pullups need to be enabled on the A and B inputs. Change the example code as shown below.

void setup()
       {	
	// Set encoder pins as inputs and enable the internal pullups
	pinMode(CLK,INPUT_PULLUP);  // enable internal pullup on pin A
	pinMode(DT,INPUT_PULLUP);  // enable internal pullup on pin B
	pinMode(SW, INPUT_PULLUP);  // // enable internal pullup on switch pin

[cedvano]

Oh great, thank you very much. I was far from the answer.

Thank you very much.