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// Arduino and KY-040 module
int encoderPinA = 8; // CLK pin
int encoderPinB = 9; // DT pin
int encoderBtn = 10; // SW pin
int count = 0;
int encoderPinA_prev;
int encoderPinA_value;
boolean bool_CW;
void setup() {
Serial.begin (9600);
pinMode (encoderPinA, INPUT);
pinMode (encoderPinB, INPUT);
pinMode(encoderBtn, INPUT_PULLUP);
encoderPinA_prev = digitalRead(encoderPinA);
}
void loop() {
encoderPinA_value = digitalRead(encoderPinA);
if (encoderPinA_value != encoderPinA_prev) { // check if knob is rotating
// if pin A state changed before pin B, rotation is clockwise
if (digitalRead(encoderPinB) != encoderPinA_value) {
count ++;
bool_CW = true;
} else {
// if pin B state changed before pin A, rotation is counter-clockwise
bool_CW = false;
count--;
}
if (bool_CW) {
Serial.print("Clockwise | ");
} else {
Serial.print("Counter-Clockwise | ");
}
Serial.print(count);
Serial.print(" | ");
}
encoderPinA_prev = encoderPinA_value;
// check if button is pressed (pin SW)
if (digitalRead(encoderBtn) == LOW) Serial.println("Button Pressed");
else Serial.println("Button Released");
}Рекомендуемые ссылки:
Using the Rotary Encoder Module KY-040 with Arduino – Phipps Electronics
GitHub – codingABI/KY040: Arduino library for KY-040 rotary encoders. The library has debouncing and works in polling mode, with pin change interrupts or normal interrupts · GitHub
KY-040 Rotary encoder – SensorKit
Rotary Encoder.pdf
KY040 – Arduino Libraries