#include "U8glib.h"
#include "ESP32Servo.h"
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0 | U8G_I2C_OPT_NO_ACK | U8G_I2C_OPT_FAST); // Fast I2C / TWI
// Rotary Encoder Inputs
#define CLK 15
#define DT 2
Servo servo;
int counter = 0;
int currentStateCLK;
int lastStateCLK;
void setup() {
u8g.setFont(u8g_font_tpssb);
u8g.setColorIndex(1);
// Set encoder pins as inputs
pinMode(CLK,INPUT);
pinMode(DT,INPUT);
// Setup Serial Monitor
Serial.begin(9600);
// Attach servo on pin 9 to the servo object
servo.attach(4);
servo.write(counter);
// Read the initial state of CLK
lastStateCLK = digitalRead(CLK);
}
void loop() {
// Read the current state of CLK
currentStateCLK = digitalRead(CLK);
// If last and current state of CLK are different, then pulse occurred
// React to only 1 state change to avoid double count
if (currentStateCLK != lastStateCLK && currentStateCLK == 1){
// If the DT state is different than the CLK state then
// the encoder is rotating CCW so decrement
if (digitalRead(DT) != currentStateCLK) {
counter --;
if (counter<0)
counter=0;
} else {
// Encoder is rotating CW so increment
counter ++;
if (counter>179)
counter=179;
}
// Move the servo
servo.write(counter);
// Serial.print("Position: ");
//Serial.println(counter);
}
// Remember last CLK state
// lastStateCLK = currentStateCLK;
u8g.firstPage();
do {
u8g.drawStr(25, 50, "Ruder:");
u8g.drawFrame(0, 10, 128, 20);
u8g.drawBox(10, 15, counter, 10);
} while ( u8g.nextPage() );
}