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A rotary encoder is an electromechanical device that converts rotational motion into electrical signals. It is commonly used to measure rotation, direction, and position. Below is an example of interfacing a rotary encoder with Arduino to detect rotation direction and position.
Example Code: Reading Rotary Encoder
#define CLK 2 // Clock pin#define DT 3 // Data pin#define SW 4 // Switch pinint counter = 0;int currentStateCLK;int lastStateCLK;String currentDir = "";void setup() {pinMode(CLK, INPUT);pinMode(DT, INPUT);pinMode(SW, INPUT_PULLUP); // Internal pull-up for the switchSerial.begin(9600);// Read initial state of CLKlastStateCLK = digitalRead(CLK);}void loop() {// Read current state of CLKcurrentStateCLK = digitalRead(CLK);// Detect rotationif (currentStateCLK != lastStateCLK && currentStateCLK == HIGH) {if (digitalRead(DT) != currentStateCLK) {counter++;currentDir = "Clockwise";} else {counter--;currentDir = "Counter-clockwise";}Serial.print("Direction: ");Serial.print(currentDir);Serial.print(" | Counter: ");Serial.println(counter);}// Save last state of CLKlastStateCLK = currentStateCLK;// Detect button pressif (digitalRead(SW) == LOW) {Serial.println("Button Pressed!");delay(200); // Debounce delay}}Gekopieerd.āKopiëren Arduino - Rotary Encoder | Arduino Tutorial
Rotary encoder with Arduino in detail with example codes
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