PIR sensor usermod

usermods/PIR_sensor_mqtt_v1/usermod.cpp

@@ -0,0 +1,53 @@
+#include "wled.h"
+/*
+ * This v1 usermod file allows you to add own functionality to WLED more easily
+ * See: https://github.com/Aircoookie/WLED/wiki/Add-own-functionality
+ * EEPROM bytes 2750+ are reserved for your custom use case. (if you extend #define EEPSIZE in const.h)
+ * If you just need 8 bytes, use 2551-2559 (you do not need to increase EEPSIZE)
+ * 
+ * Consider the v2 usermod API if you need a more advanced feature set!
+ */
+
+//Use userVar0 and userVar1 (API calls &U0=,&U1=, uint16_t)
+
+// PIR sensor pin
+const int MOTION_PIN = 16;
+
+int prevState = LOW;
+
+//gets called once at boot. Do all initialization that doesn't depend on network here
+void userSetup()
+{
+  pinMode(MOTION_PIN, INPUT);
+}
+
+//gets called every time WiFi is (re-)connected. Initialize own network interfaces here
+void userConnected()
+{
+
+}
+
+void publishMqtt(String state)
+{
+  //Check if MQTT Connected, otherwise it will crash the 8266
+  if (mqtt != nullptr){
+    char subuf[38];
+    strcpy(subuf, mqttDeviceTopic);
+    strcat(subuf, "/kitchen_motion");
+    mqtt->publish(subuf, 0, true, state.c_str());
+  }
+}
+
+//loop. You can use "if (WLED_CONNECTED)" to check for successful connection
+void userLoop()
+{
+  if (digitalRead(MOTION_PIN) == HIGH && prevState == LOW) { // Motion detected
+    publishMqtt("ON");
+    prevState = HIGH;
+  } 
+  if (digitalRead(MOTION_PIN) == LOW && prevState == HIGH) {  // Motion stopped
+    publishMqtt("OFF");
+    prevState = LOW;
+  }
+}
+