Added getPinOwner

Only disable builtin LED if bus to avoid breaking other things on the pin

wled00/button.cpp

@@ -299,8 +299,11 @@ void handleIO()
       #ifdef ESP8266
       // turn off built-in LED if strip is turned off
       // this will break digital bus so will need to be reinitialised on On
-      pinMode(LED_BUILTIN, OUTPUT);
-      digitalWrite(LED_BUILTIN, HIGH);
+      PinOwner ledPinOwner = pinManager.getPinOwner(LED_BUILTIN);
+      if (!strip.isOffRefreshRequred && (ledPinOwner == PinOwner::None || ledPinOwner == PinOwner::BusDigital)) {
+        pinMode(LED_BUILTIN, OUTPUT);
+        digitalWrite(LED_BUILTIN, HIGH);
+      }
       #endif
       if (rlyPin>=0) {
         pinMode(rlyPin, OUTPUT);

wled00/pin_manager.cpp

@@ -125,6 +125,11 @@ bool PinManagerClass::isPinOk(byte gpio, bool output)
   return false;
 }
 
+PinOwner PinManagerClass::getPinOwner(byte gpio) {
+  if (!isPinOk(gpio, false)) return PinOwner::None;
+  return ownerTag[gpio];
+}
+
 #ifdef ARDUINO_ARCH_ESP32
 byte PinManagerClass::allocateLedc(byte channels)
 {

wled00/pin_manager.h

@@ -92,6 +92,8 @@ class PinManagerClass {
   bool isPinAllocated(byte gpio, PinOwner tag = PinOwner::None);
   bool isPinOk(byte gpio, bool output = true);
 
+  PinOwner getPinOwner(byte gpio);
+
   #ifdef ARDUINO_ARCH_ESP32
   byte allocateLedc(byte channels);
   void deallocateLedc(byte pos, byte channels);