The joystick is a double direction 10K potentiometer, the resistor value is changing when joystick direction changes. This module use 5V power supply, reading value around 2.5V at the raw condition, value will increase when the arrow go down till maxium 5V; the value will decrease when the arrow go other direction till 0V.

• Arduino standard 3 pins
• 2.54 standard pins
  

 
iint FirstShotX , FirstShotY;
 
void setup()
{
  for(int i=0; i<19; i++)
  {
    pinMode(i, INPUT);
    digitalWrite(i, 1);
  }
 
  Serial.begin(9600);
  FirstShotX = 0;
  FirstShotY = 0;
 
}
 
void loop(){
 
  int i, someInt, flag = 0;
  for(i=4; i<11; i++)
  {
    someInt = digitalRead(i);
    if(someInt == 0)
    { 
      flag =1;
      break;
    }
   }
   if(flag == 1)
   {   
     switch(i)
     {
       case 4: Serial.println("--------> Button A"); break;
       case 5: Serial.println("--------> Button B"); break;
       case 6: Serial.println("--------> Button C"); break;
       case 7: Serial.println("--------> Button D"); break;
       case 8: Serial.println("--------> Button E"); break;
       case 9: Serial.println("--------> Button F"); break;
       case 10: Serial.println("--------> Button KEY"); break;
       default: break;
     }
     flag=0;
   }
 
   int sensorValue = analogRead(A0);
   if(FirstShotX == 0)
   { 
     FirstShotX = sensorValue;
     Serial.print("FirstShotX = ");
     Serial.println(FirstShotX);
   }
 
   Serial.print("X = ");
   Serial.println(sensorValue - FirstShotX);
 
   sensorValue = analogRead(A1);
   if(FirstShotY == 0)
   { 
     FirstShotY = sensorValue;
     Serial.print("FirstShotY = ");
     Serial.println(FirstShotY);
   }
   Serial.print("Y = ");
   Serial.println(sensorValue - FirstShotY);
 
   delay(200);
}

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