implement button

things/HardwareSonoff.h

@@ -12,19 +12,43 @@
 
 const char* FWNAME = "things@Sonoff";
 
+bool state = LOW;
+bool switched = false;
+
 const byte PIN_BUTTON = 0;
 
 const byte PIN_RELAY = 12;
 DeviceRelay deviceRelay(PIN_RELAY, "relay");
 
+const byte PIN_LED = 13;
+
 Device* devices[] = {
   &deviceRelay,
 };
 
 void hardwareSetup() {
-  Homie.setLedPin(13, HIGH);
+  Homie.setLedPin(PIN_LED, HIGH);
+  pinMode(PIN_BUTTON, INPUT);
   pinMode(PIN_RELAY, OUTPUT);
   digitalWrite(PIN_RELAY, HIGH);
 };
 
-void hardwareLoop() {};
+void hardwareLoop() {
+  digitalWrite(PIN_LED, !state);
+  for (int i = 0; i < 3; i++) {
+    if (digitalRead(PIN_BUTTON) == HIGH) {
+      switched = false;
+      return;
+    }
+    delay(10);
+  }
+  if (!switched) {
+    state = !state;
+    if (state) {
+      deviceRelay.relayOnHandler("true");
+    } else {
+      deviceRelay.relayOnHandler("false");
+    }
+    switched = true;
+  }
+};