initial commit

homie-rcwl.ino

@@ -0,0 +1,55 @@
+#include <Homie.h>
+
+const byte TRIGGER_PIN = 3; //pin 3 which is RX pin. Doesn't seem to work on GPIO0 or GPIO2, maybe because they have internal pull up resistors?
+const unsigned int TRIGGER_HOLD_TIME = 5000; // 5 seconds
+unsigned long triggerTime = 0;
+enum trigger_status {start, stop};
+
+trigger_status triggerStatus = stop;
+
+HomieNode motionNode("motion", "Motion", "motion");
+
+void loopHandler(){
+  
+  if (digitalRead(TRIGGER_PIN) == HIGH) {                 // if triggered
+    triggerTime = millis();                               // set trigger timer to current time
+    
+    if (triggerStatus == stop) {                          // if trigger status == stop
+      motionNode.setProperty("motion").send("true");      // send mqtt "motion started"
+      triggerStatus = start;                              // set trigger status to start
+    }
+  }
+  
+  else {                                                  // if not triggered
+    if (triggerStatus == start) {                         // if trigger status == start
+      if (millis() - triggerTime >= TRIGGER_HOLD_TIME) {  // if difference between 'current time' and 'trigger timer' >= 'trigger hold time'
+        motionNode.setProperty("motion").send("false");   // send mqtt "motion stopped" 
+        triggerStatus = stop;                             // set trigger status to "stop"
+      }
+    }
+  } //end else      
+} // loopHandler()
+
+
+void setup() {
+  //Serial.begin(115200);
+  Homie_setFirmware("homie-motion", "1.0.0");
+  Homie.setLoopFunction(loopHandler);
+  
+  pinMode(TRIGGER_PIN, INPUT);
+  triggerStatus = stop; 
+  
+  motionNode.advertise("motion").setName("Motion Detected")
+                                .setDatatype("boolean")
+                                .setRetained(false);
+  Homie.setup();
+    
+  motionNode.setProperty("motion").send("false");
+
+}
+
+
+// the loop routine runs over and over again forever:
+void loop() {
+  Homie.loop();
+}