Upload TouchBrightnessControl Usermod for ESP32 (#1183)

* Upload Usermod

* Fix missing : public Usermod

* Increased default threshold, added touchPin #define

Co-authored-by: Aircoookie <cschwinne@gmail.com>

usermods/ESP32_TouchBrightnessControl/readme.md

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+# ESP32 Touch Brightness Control
+
+Toggle On/Off with a long press (800ms)
+Switch through 5 brightness levels (defined in usermod_touchbrightness.h, values 0-255) with a short (100ms) touch
+
+## Installation 
+
+Copy 'usermod_touchbrightness.h' to the wled00 directory.  
+in 'usermod_list.cpp' add this:
+
+> #include "usermod_touchbrightness.h"
+above "void registerUsermods()"
+
+and
+
+> usermods.add(new TouchBrightnessControl());
+inside the "registerUsermods()" function
+
+

usermods/ESP32_TouchBrightnessControl/usermod_touchbrightness.h

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+//
+//  usermod_touchbrightness.h
+//  github.com/aircoookie/WLED
+//
+//  Created by Justin Kühner on 14.09.2020.
+//  Copyright © 2020 NeariX. All rights reserved.
+//  https://github.com/NeariX67/
+//  Discord: @NeariX#4799
+
+
+#pragma once
+
+#include "wled.h"
+
+#define threshold 40                    //Increase value if touches falsely accur. Decrease value if actual touches are not recognized
+#define touchPin T0                     //T0 = D4 / GPIO4
+
+//Define the 5 brightness levels
+//Long press to turn off / on
+#define brightness1 51
+#define brightness2 102
+#define brightness3 153
+#define brightness4 204
+#define brightness5 255
+
+
+#ifdef ESP32
+
+
+class TouchBrightnessControl : public Usermod {
+  private:
+    unsigned long lastTime = 0;         //Interval
+    unsigned long lastTouch = 0;        //Timestamp of last Touch
+    unsigned long lastRelease = 0;      //Timestamp of last Touch release
+    boolean released = true;            //current Touch state (touched/released)
+    uint16_t touchReading = 0;          //sensor reading, maybe use uint8_t???
+    uint16_t touchDuration = 0;         //duration of last touch
+  public:
+  
+    void setup() {
+      lastTouch = millis();
+      lastRelease = millis();
+      lastTime = millis();
+    }
+
+    void loop() {
+      if (millis() - lastTime >= 50) {                           //Check every 50ms if a touch occurs
+        lastTime = millis();
+        touchReading = touchRead(touchPin);                      //Read touch sensor on pin T0 (GPIO4 / D4)
+        
+        if(touchReading < threshold && released) {               //Touch started
+          released = false;
+          lastTouch = millis();
+        }
+        else if(touchReading >= threshold && !released) {        //Touch released
+          released = true;
+          lastRelease = millis();
+          touchDuration = lastRelease - lastTouch;               //Calculate duration
+        }
+        
+        //Serial.println(touchDuration);
+
+        if(touchDuration >= 800 && released) {                   //Toggle power if button press is longer than 800ms
+          touchDuration = 0;                                     //Reset touch duration to avoid multiple actions on same touch
+          toggleOnOff();
+          colorUpdated(2);                                       //Refresh values
+        }
+        else if(touchDuration >= 100 && released) {              //Switch to next brightness if touch is between 100 and 800ms
+          touchDuration = 0;                                     //Reset touch duration to avoid multiple actions on same touch
+          if(bri < brightness1) {
+            bri = brightness1;
+          } else if(bri >= brightness1 && bri < brightness2) {
+            bri = brightness2;
+          } else if(bri >= brightness2 && bri < brightness3) {
+            bri = brightness3;
+          } else if(bri >= brightness3 && bri < brightness4) {
+            bri = brightness4;
+          } else if(bri >= brightness4 && bri < brightness5) {
+            bri = brightness5;
+          } else if(bri >= brightness5) {
+            bri = brightness1;
+          }
+          colorUpdated(2);                                       //Refresh values
+        }
+        
+      }
+    }
+};
+#endif