- volatile byte aFlag = 0; // let's us know when we're expecting a rising edge on pinA to signal that the encoder has arrived at a detent
- volatile byte bFlag = 0; // let's us know when we're expecting a rising edge on pinB to signal that the encoder has arrived at a detent (opposite direction to when aFlag is set)
- volatile byte encoderPos = 0; //this variable stores our current value of encoder position. Change to int or uin16_t instead of byte if you want to record a larger range than 0-255
- volatile byte oldEncPos = 0; //stores the last encoder position value so we can compare to the current reading and see if it has changed (so we know when to print to the serial monitor)
- volatile byte reading1 = 0; //somewhere to store the direct values we read from our interrupt pins before checking to see if we have moved a whole detent
- volatile byte reading2 = 0; //somewhere to store the direct values we read from our interrupt pins before checking to see if we have moved a whole detent
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