// Rotary Encoder Inputs
#define inputCLK 4
#define inputDT 5
// LED Outputs
#define ledCW 8
#define ledCCW 9
int counter = 0;
int currentStateCLK;
int previousStateCLK;
String encdir ="";
void setup() {
// Set encoder pins as inputs
pinMode (inputCLK,INPUT);
pinMode (inputDT,INPUT);
// Set LED pins as outputs
pinMode (ledCW,OUTPUT);
pinMode (ledCCW,OUTPUT);
// Setup Serial Monitor
Serial.begin (9600);
// Read the initial state of inputCLK
// Assign to previousStateCLK variable
previousStateCLK = digitalRead(inputCLK);
}
void loop() {
// Read the current state of inputCLK
currentStateCLK = digitalRead(inputCLK);
// If the previous and the current state of the inputCLK are different then a pulse has occured
if (currentStateCLK != previousStateCLK){
// If the inputDT state is different than the inputCLK state then
// the encoder is rotating counterclockwise
if (digitalRead(inputDT) != currentStateCLK) {
counter --;
encdir ="CCW";
digitalWrite(ledCW, LOW);
digitalWrite(ledCCW, HIGH);
} else {
// Encoder is rotating clockwise
counter ++;
encdir ="CW";
digitalWrite(ledCW, HIGH);
digitalWrite(ledCCW, LOW);
}
Serial.print("Direction: ");
Serial.print(encdir);
Serial.print(" -- Value: ");
Serial.println(counter);
}
// Update previousStateCLK with the current state
previousStateCLK = currentStateCLK;
}