Changes

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "CodeGPT.apiKey": "CodeGPT Plus Beta"
+}

platformio.ini

@@ -11,6 +11,7 @@
 [env:esp32doit-devkit-v1]
 platform = espressif32
 board = esp32doit-devkit-v1
+monitor_speed = 115200
 framework = arduino
 lib_deps = 
 	knolleary/PubSubClient@^2.8

src/main.cpp

@@ -6,8 +6,7 @@
 const int PIR_PIN=23;
 const char* ssid = "JoNelsDarlings";
 const char* password = "Paris2016";
-const char* mqtt_server = "mqtt.ddns.kawomi.com";
+const char* mqttServerName = "mqtt.ddns.kawomi.com";
-
 
 WiFiClient espClient;
 PubSubClient mqttClient(espClient);
@@ -16,7 +15,6 @@ unsigned long lastMsg = 0;
 char msg[MSG_BUFFER_SIZE];
 
 void setup_wifi() {
-
   delay(10);
   // We start by connecting to a WiFi network
   Serial.println();
@@ -39,37 +37,19 @@ void setup_wifi() {
   Serial.println(WiFi.localIP());
 }
 
+void send_mqtt(String status, long minutes=0) {
+  Serial.print("MQTT Send status ");
+  Serial.print(status);
+  Serial.print(" mins ");
+  Serial.println(minutes);
 
-void reconnect() {
+  JsonDocument doc;
-  // Loop until we're reconnected
-  while (!mqttClient.connected()) {
-    Serial.print("Attempting MQTT connection...");
-    // Create a random client ID
-    String clientId = "ESP32Client-";
-    clientId += String(random(0xffff), HEX);
-    // Attempt to connect
-    if (mqttClient.connect(clientId.c_str())) {
-      Serial.println("MQTT connected");
-      // Once connected, publish an announcement...
-    } else {
-      Serial.print("MQTT failed, rc=");
-      Serial.print(mqttClient.state());
-      Serial.println(" try again in 5 seconds");
-      // Wait 5 seconds before retrying
-      delay(5000);
-    }
-  }
-}
-
-void send_mqtt(String value) {
-  const size_t CAPACITY = JSON_OBJECT_SIZE(1);
-  StaticJsonDocument<CAPACITY> doc;
-
-  // create an object
   JsonObject object = doc.to<JsonObject>();
-  object["status"] = value.c_str();
+  object["status"] = status.c_str();
+  if (minutes > 0) {
+    object["minutes"] = minutes;
+  }
 
-  // serialize the object and send the result to Serial
   static char sensorStatus[150];
   serializeJson(doc, sensorStatus);
   Serial.println(sensorStatus);
@@ -77,28 +57,89 @@ void send_mqtt(String value) {
   mqttClient.publish("Address/Livorno/Kitchen/PIR", sensorStatus, true);
 }
 
+void reconnect() {
+  int numRetries=0;
+  
+  while (!mqttClient.connected()) {
+    numRetries++;
+    Serial.print("Attempting MQTT connection...");
+    
+    // Create a random client ID
+    String clientId = "ESP32Client-";
+    clientId += String(random(0xffff), HEX);
+    
+    if (mqttClient.connect(clientId.c_str())) {
+      Serial.println("MQTT connected");
+    } else {
+      Serial.print("MQTT failed, rc=");
+      Serial.print(mqttClient.state());
+      Serial.println(" try again in 5 seconds");
+      
+      if (numRetries>5){
+        Serial.println("Too many retries, restarting the ESP...");
+        ESP.restart();
+      }
+
+      delay(5000);
+    }
+  }
+  send_mqtt("ready");
+}
 
 void setup() {
   pinMode(LED_BUILTIN,OUTPUT);
-  pinMode(PIR_PIN,INPUT);
+  pinMode(PIR_PIN,INPUT_PULLUP);
 
   Serial.begin(115200);
   setup_wifi();
-  mqttClient.setServer(mqtt_server, 1883);
+  const int mqttPort=1883;
-
+  mqttClient.setServer(mqttServerName, mqttPort);
 }
 
+const int millisPerSecond=1000;
+long previousMotionMillis=millis();
+short previousState=-1;
+long previousNoMoNotifyMinutes=0;
+
 void loop() {
   if (!mqttClient.connected()) {
     reconnect();
   }
   mqttClient.loop();
 
-  int pir = digitalRead(PIR_PIN);
+  short currentState = digitalRead(PIR_PIN);
-  if (pir == HIGH) {
+  // This out pin triggering is dependent not only on movement, but also on light levels which can be configured in the app. 
+  // I set it to 255 and "below" - this triggered it for me.....  
+  //send_mqtt("occupancy_state_debug", currentState);
+
+  // When occupancy is detected, reset the timer
+  if (currentState == HIGH) {
+    previousMotionMillis=millis();
+  }
+
+  // Send messages only on status change, we don't want to flood the network...
+  if (currentState != previousState) {
+    Serial.print("Status changed; currentState: ");
+    Serial.print(currentState);
+    Serial.print(" previousState: ");
+    Serial.println(previousState);
+    if (currentState == HIGH) {
       send_mqtt("motion");  
       digitalWrite(LED_BUILTIN,HIGH);
-    delay(1000);
+    } else {
+      send_mqtt("no_motion_immediate");
       digitalWrite(LED_BUILTIN,LOW);
     }
+    previousState = currentState;
+  }
+
+  // Send no_motion messages every minute, indicating how long we didn't see occupancy
+  const int secondsPerMinute=60;
+  long minutesSinceLastMotion=(millis()-previousMotionMillis)/(millisPerSecond*secondsPerMinute);
+  if ((previousNoMoNotifyMinutes != minutesSinceLastMotion) && (0 != minutesSinceLastMotion)) {
+    send_mqtt("no_motion", minutesSinceLastMotion);
+    previousNoMoNotifyMinutes = minutesSinceLastMotion;
+  }
+
+  delay(50);
 }