using RepRapDiscount Full Graphic Smart Controller encoder.

Projects General Guidance
1

Hello guys,
I have bought this module: RepRapDiscount Full Graphic Smart Controller - RepRap
and I want to use it for other purpose instand of 3D printers.

I've managed to access to the beeper and the 128*64 LCD and the rotary button,
But I was unable to detect right\left movement on the rotary, I have attached Rotary encoder to arduino before this way.

Using the code that i've wrote:

#include <Wire.h>                        
  
#define inputROTARYBUTTON 12
#define inputRIGHT 10
#define inputLEFT 11
#define BUTTONCLICKED 0
  
 int counter = 0; 
 int currentState;
 int previousState; 

bool ButtonClicked(int id){
  return (digitalRead(id) == BUTTONCLICKED);
}
 
 void setup() { 
  Serial.begin (9600);
   // Set encoder pins as inputs  
   pinMode (inputRIGHT,INPUT);
   pinMode (inputLEFT,INPUT);
   
   pinMode(inputROTARYBUTTON, INPUT_PULLUP);  
   digitalWrite(inputROTARYBUTTON, HIGH);
   
   // Setup Serial Monitor
   
   previousState = digitalRead(inputRIGHT);
 
 } 
 
 void loop() {  
  delay(10);
   currentState = digitalRead(inputRIGHT);  
   if (currentState != previousState){ 
     if (digitalRead(inputLEFT) != currentState) {  //TURN RIGHT
       counter --;    
     } else { //TURN LEFT
       counter ++;     
     }
     Serial.print("Value: ");
     Serial.println(counter);
   } 
   previousState = currentState; 
   if(ButtonClicked(inputROTARYBUTTON) == 1){
     Serial.println("clicked!");
   }
 }

according to "RepRap ..... smart controller" schematic I've plugged 3,5PINS on EXP2 to pin 10,11 on Arduino, but its seem to be all the time as 'HIGH'.

how cam i fix it?

2

set the pinModes to INPUT_PULLUP. With gnd to Arduino ground, of course. The encoder outputs are switches, so treat them as such.

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