From 46ca7f92e9f453b418f4355886f50144991ef0e3 Mon Sep 17 00:00:00 2001
From: Tilman <tliero@gmx.net>
Date: Fri, 27 Jan 2023 09:43:10 +0100
Subject: [PATCH] esp rotary encoder

---
 .../nano_ky-040_rotary/nano_ky-040_rotary.ino | 118 ++++++++++++++++++
 .../nano_simple_rotary/nano_simple_rotary.ino |  71 +++++++++++
 2 files changed, 189 insertions(+)
 create mode 100644 nano/nano_ky-040_rotary/nano_ky-040_rotary.ino
 create mode 100644 nano/nano_simple_rotary/nano_simple_rotary.ino

diff --git a/nano/nano_ky-040_rotary/nano_ky-040_rotary.ino b/nano/nano_ky-040_rotary/nano_ky-040_rotary.ino
new file mode 100644
index 0000000..08e29ac
--- /dev/null
+++ b/nano/nano_ky-040_rotary/nano_ky-040_rotary.ino
@@ -0,0 +1,118 @@
+// https://lastminuteengineers.com/rotary-encoder-arduino-tutorial/
+
+#include <Adafruit_NeoPixel.h>
+
+#define NUMPIXELS 12
+#define LEDPIN 2
+
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, LEDPIN, NEO_GRB + NEO_KHZ800);
+
+// Rotary Encoder Inputs
+#define CLK 8
+#define DT 9
+#define SW 10
+
+int currentStateCLK;
+int lastStateCLK;
+String currentDir = "";
+unsigned long lastButtonPress = 0;
+
+#define HUE_STEP 1200
+#define VAL_STEP 10
+
+long hue = 0;    // 0-65535 https://adafruit.github.io/Adafruit_NeoPixel/html/class_adafruit___neo_pixel.html#a1f16aee5b96e16e62598f826e292b23b
+int saturation = 0; // 0-255
+int value = 60;    // 0-255
+
+
+
+void setup() {
+  Serial.begin(115200);
+
+  pinMode(CLK,INPUT);
+  pinMode(DT,INPUT);
+  pinMode(SW, INPUT_PULLUP);
+  
+  // Read the initial state of CLK
+  lastStateCLK = digitalRead(CLK);
+  
+  pixels.begin(); // initialize NeoPixel library.
+  pixels.fill(pixels.gamma32(pixels.ColorHSV(hue, saturation, value)), 0, NUMPIXELS);
+  pixels.show();
+
+  Serial.println("PIXELS");
+}
+
+void loop() {
+  currentStateCLK = digitalRead(CLK);
+  int btnState = digitalRead(SW);
+
+  // If last and current state of CLK are different, then pulse occurred
+  if (currentStateCLK != lastStateCLK  && currentStateCLK == 1){
+
+    if (digitalRead(DT) != currentStateCLK) {
+      currentDir ="CW";
+      if (btnState == LOW) {
+        hue += HUE_STEP;
+        if (hue > 65535) {
+          hue = 65535;
+          saturation = 0;
+        }
+        else {
+          saturation = 255;
+        }
+      }
+      else {
+        value += VAL_STEP;
+        if (value > 255) {
+          value = 255;
+        }
+      }
+    } else {
+      currentDir ="CCW";
+      if (btnState == LOW) {
+        hue -= HUE_STEP;
+        if (hue < 0) {
+          hue = 0;
+          saturation = 0;
+        }
+        else {
+          saturation = 255;
+        }
+      }
+      else {
+        value -= VAL_STEP;
+        if (value < 30) {
+          value = 0;
+        }
+      }
+    }
+
+
+    Serial.print("Direction: ");
+    Serial.print(currentDir);
+    Serial.print(" | Hue: ");
+    Serial.print(hue);
+    Serial.print(" | Sat: ");
+    Serial.print(saturation);
+    Serial.print(" | Val: ");
+    Serial.println(value);
+
+    
+    pixels.fill(pixels.gamma32(pixels.ColorHSV(hue, saturation, value)), 0, NUMPIXELS);
+    pixels.show();
+  }
+/*  else if (btnState == LOW) {
+    //if 50ms have passed since last LOW pulse, it means that the
+    //button has been pressed, released and pressed again
+    if (millis() - lastButtonPress > 50) {
+      Serial.println("Button pressed!");
+    }
+    lastButtonPress = millis();
+  }*/
+
+  lastStateCLK = currentStateCLK;
+
+  // Put in a slight delay to help debounce the reading
+  delay(1);
+}
diff --git a/nano/nano_simple_rotary/nano_simple_rotary.ino b/nano/nano_simple_rotary/nano_simple_rotary.ino
new file mode 100644
index 0000000..77984bc
--- /dev/null
+++ b/nano/nano_simple_rotary/nano_simple_rotary.ino
@@ -0,0 +1,71 @@
+// https://starthardware.org/arduino-und-encoder-schaltplan-erklaerung-code/
+
+#include <Adafruit_NeoPixel.h>
+
+#define NUMPIXELS 12
+#define LEDPIN 2
+
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, LEDPIN, NEO_GRB + NEO_KHZ800);
+
+int encoderPinA = 4;
+int encoderPinB = 5;
+int encoderPos = 0;
+int encoderPinALast = LOW;
+int encoderPinANow = LOW;
+
+long colorNew = 65535;
+long color = 65535;
+
+
+void setup() {
+  pinMode (encoderPinA, INPUT_PULLUP);
+  pinMode (encoderPinB, INPUT_PULLUP);
+  Serial.begin (115200);
+
+  delay(150);
+  Serial.println("PIXELS");
+  
+  pixels.begin(); // initialize NeoPixel library.
+
+  //pixels.setBrightness(40);
+  //pixels.fill(pixels.Color(217, 101, 0), 0, NUMPIXELS);
+  
+  pixels.fill(pixels.gamma32(pixels.ColorHSV(65535, 255, 190)), 0, NUMPIXELS);
+  pixels.show();
+  
+  /*
+  for(long firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
+    pixels.rainbow(firstPixelHue);
+    pixels.show();
+    delay(10);
+  }
+  */
+}
+
+void loop() {
+  encoderPinANow = digitalRead(encoderPinA);
+  if ((encoderPinALast == HIGH) && (encoderPinANow == LOW)) {
+    if (digitalRead(encoderPinB) == HIGH) {
+      encoderPos++;
+      colorNew += 4096;
+    } else {
+      encoderPos--;
+      colorNew -= 4096;
+    }
+    
+    if (colorNew > 65535) {
+      colorNew = 0;
+    }
+    else if (colorNew < 0) {
+        colorNew = 65535;
+    }
+  }
+  encoderPinALast = encoderPinANow;
+
+  if (colorNew != color) {
+    color = colorNew;
+    pixels.fill(pixels.gamma32(pixels.ColorHSV(color, 255, 100)), 0, NUMPIXELS);
+    pixels.show();
+    Serial.println(color);
+  }
+}