Force AP mode on power bounce

-  requires 3 power cycles

usermods/powerap/powerap.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "wled.h"
+
+//class name. Use something descriptive and leave the ": public Usermod" part :)
+class PowerAPUsermod : public Usermod {
+  private:
+    unsigned long lastTime = 0;
+    String fname = F("/boot.dat");
+
+  public:
+    void setup() {
+      if (WLED_FS.exists(fname)) {
+        File fl = WLED_FS.open(fname,"w");
+        fl.seek(0);
+        char data = fl.read();
+        if (data == '0') {
+          fl.seek(0);
+          fl.write('1');
+        } else if (data == '1') {
+          apBehavior = AP_BEHAVIOR_ALWAYS;
+          WLED::instance().initAP(true);
+        }
+        fl.close();
+      } else {
+        File fl = WLED_FS.open(fname,"w");
+        fl.write('0');
+        fl.close();
+      }
+    }
+
+    void loop() {
+      if (millis() < 10000 && millis() - lastTime > 5000) {
+        lastTime = millis();
+        if (WLED_FS.exists(fname)) {
+          WLED_FS.remove(fname);
+        }
+     }
+    }
+
+    uint16_t getId() { return USERMOD_ID_UNSPECIFIED; }
+
+};

wled00/usermods_list.cpp

@@ -176,6 +176,10 @@
 #include "../usermods/pwm_outputs/usermod_pwm_outputs.h"
 #endif
 
+#ifdef USERMOD_POWER_AP
+#include "../usermods/powerap/powerap.h"
+#endif
+
 
 void registerUsermods()
 {
@@ -332,4 +336,8 @@ void registerUsermods()
   #ifdef USERMOD_PWM_OUTPUTS
   usermods.add(new PwmOutputsUsermod());
   #endif
+
+  #ifdef USERMOD_POWER_AP
+  usermods.add(new PowerAPUsermod());
+  #endif
 }