Added option to set SpanButton type

Types include: GROUNDED, POWERED, and TOUCH.
Also added configureTouch() to customize parameters used for touch sensors.

src/HomeSpan.cpp

@@ -61,6 +61,8 @@ void Span::begin(Category catID, const char *displayName, const char *hostNameBa
 
   statusLED.init(statusPin,0,autoOffLED);
 
+  PushButton::configureTouch(4000,1000,10);                   // set default parameters for any touch-style pushbuttons
+
   if(requestedMaxCon<maxConnections)                          // if specific request for max connections is less than computed max connections
     maxConnections=requestedMaxCon;                           // over-ride max connections with requested value
     
@@ -1961,7 +1963,7 @@ SpanRange::SpanRange(int min, int max, int step){
 //        SpanButton         //
 ///////////////////////////////
 
-SpanButton::SpanButton(int pin, uint16_t longTime, uint16_t singleTime, uint16_t doubleTime){
+SpanButton::SpanButton(int pin, uint16_t longTime, uint16_t singleTime, uint16_t doubleTime, Button buttonType){
 
   if(homeSpan.Accessories.empty() || homeSpan.Accessories.back()->Services.empty()){
     Serial.printf("\nFATAL ERROR!  Can't create new SpanButton(%d,%u,%u,%u) without a defined Service ***\n",pin,longTime,singleTime,doubleTime);
@@ -1975,7 +1977,7 @@ SpanButton::SpanButton(int pin, uint16_t longTime, uint16_t singleTime, uint16_t
   this->doubleTime=doubleTime;
   service=homeSpan.Accessories.back()->Services.back();
 
-  pushButton=new PushButton(pin);         // create underlying PushButton
+  pushButton=new PushButton(pin,buttonType);         // create underlying PushButton
   homeSpan.PushButtons.push_back(this);
 }
 

src/HomeSpan.h

@@ -713,7 +713,10 @@ class SpanButton{
     LONG=2
   };
   
-  SpanButton(int pin, uint16_t longTime=2000, uint16_t singleTime=5, uint16_t doubleTime=200);
+  SpanButton(int pin, uint16_t longTime=2000, uint16_t singleTime=5, uint16_t doubleTime=200, Button buttonType=Button::GROUNDED);
+  SpanButton(int pin, Button buttonType, uint16_t longTime=2000, uint16_t singleTime=5, uint16_t doubleTime=200) : SpanButton(pin,longTime,singleTime,doubleTime,buttonType){};
+
+  static void configureTouch(uint16_t measureTime, uint16_t sleepTime, uint16_t thresh){PushButton::configureTouch(measureTime,sleepTime,thresh);}
 };
 
 ///////////////////////////////

src/Utils.cpp

@@ -85,12 +85,30 @@ String Utils::mask(char *c, int n){
 //         PushButton         //
 ////////////////////////////////
 
-PushButton::PushButton(int pin){
+PushButton::PushButton(int pin, Button buttonType){
 
   this->pin=pin;
   status=0;
   doubleCheck=false;
-  pinMode(pin, INPUT_PULLUP);
+
+  switch(buttonType){
+
+    case Button::GROUNDED:
+      pinMode(pin, INPUT_PULLUP);
+      pressed=groundedButton;
+    break;
+    
+    case Button::POWERED:
+      pinMode(pin, INPUT_PULLDOWN);
+      pressed=poweredButton;
+    break;
+
+    case Button::TOUCH:
+      pressed=touchButton;
+    break;
+
+  };
+  
 }
 
 //////////////////////////////////////
@@ -108,7 +126,7 @@ boolean PushButton::triggered(uint16_t singleTime, uint16_t longTime, uint16_t d
         return(true);
       }
       
-      if(!digitalRead(pin)){         // button is pressed
+      if(pressed(pin)){         // button is pressed
         singleAlarm=cTime+singleTime;
         if(!doubleCheck){
           status=1;
@@ -122,7 +140,7 @@ boolean PushButton::triggered(uint16_t singleTime, uint16_t longTime, uint16_t d
   
     case 1:
     case 2:
-      if(digitalRead(pin)){         // button is released          
+      if(!pressed(pin)){         // button is released          
         status=0;
         if(cTime>singleAlarm){
           doubleCheck=true;
@@ -138,7 +156,7 @@ boolean PushButton::triggered(uint16_t singleTime, uint16_t longTime, uint16_t d
     break;
 
     case 3:
-      if(digitalRead(pin))          // button has been released after a long press
+      if(!pressed(pin))          // button has been released after a long press
         status=0;
       else if(cTime>longAlarm){
         longAlarm=cTime+longTime;
@@ -148,7 +166,7 @@ boolean PushButton::triggered(uint16_t singleTime, uint16_t longTime, uint16_t d
     break;
 
     case 4:    
-      if(digitalRead(pin)){         // button is released          
+      if(!pressed(pin)){         // button is released          
         status=0;
       } else
       
@@ -161,7 +179,7 @@ boolean PushButton::triggered(uint16_t singleTime, uint16_t longTime, uint16_t d
     break;
 
     case 5:
-      if(digitalRead(pin))          // button has been released after double-click
+      if(!pressed(pin))          // button has been released after double-click
         status=0;
      break;
 
@@ -191,7 +209,7 @@ int PushButton::type(){
 //////////////////////////////////////
 
 void PushButton::wait(){  
-  while(!digitalRead(pin));
+  while(pressed(pin));
 }
 
 //////////////////////////////////////
@@ -200,6 +218,10 @@ void PushButton::reset(){
   status=0;
 }
 
+//////////////////////////////////////
+
+uint16_t PushButton::touchThreshold;
+
 ////////////////////////////////
 //         Blinker            //
 ////////////////////////////////

src/Utils.h

@@ -37,6 +37,12 @@ String mask(char *c, int n);          // simply utility that creates a String fr
   
 }
 
+enum class Button {
+  GROUNDED,
+  POWERED,
+  TOUCH
+};
+
 /////////////////////////////////////////////////
 // Creates a temporary buffer that is freed after
 // going out of scope
@@ -80,7 +86,14 @@ class PushButton{
   uint32_t doubleAlarm;
   uint32_t longAlarm;
   int pressType;
+  boolean (*pressed)(int pin);
+  
+  static uint16_t touchThreshold;
 
+  static boolean groundedButton(int pin){return(!digitalRead(pin));}
+  static boolean poweredButton(int pin){return(digitalRead(pin));}
+  static boolean touchButton(int pin){return(touchRead(pin)<touchThreshold);}
+  
   public:
 
   enum {
@@ -88,8 +101,8 @@ class PushButton{
     DOUBLE=1,
     LONG=2
   };
-  
+
-  PushButton(int pin);
+  PushButton(int pin, Button buttonType=Button::GROUNDED);
 
 //  Creates generic pushbutton functionality on specified pin.
 //
@@ -137,6 +150,10 @@ class PushButton{
 
 //  Returns pin number
 
+  static void configureTouch(uint16_t measureTime, uint16_t sleepTime, uint16_t thresh){touchSetCycles(measureTime,sleepTime);touchThreshold=thresh;}
+
+//  Sets the measure time, sleep time, and lower threshold that triggers a touch - used only when buttonType=Button::TOUCH
+
 };
 
 ////////////////////////////////

src/src.ino

@@ -12,6 +12,13 @@ CUSTOM_CHAR_STRING(DarkMode, AAAAAAAA-BBBB-AAAA-AAAA-AAAAAAAAAAAA, PR, "MY_VALUE
 void setup() {
  
   Serial.begin(115200);
+
+  touchSetCycles(4000,1000);
+  
+  while(1){
+    Serial.println(touchRead(4));
+    delay(1000);
+  }
  
 // homeSpan.setLogLevel(2);
 //  homeSpan.setStatusPin(13);