change garage door to send MQTT

platformio.ini

@@ -12,3 +12,6 @@
 platform = espressif32
 board = esp32doit-devkit-v1
 framework = arduino
+lib_deps = 
+	knolleary/PubSubClient@^2.8
+	bblanchon/ArduinoJson@^6.19.4

src/main.cpp

@@ -6,16 +6,24 @@
 #include <ESPmDNS.h>
 #include <Update.h>
 #include <SPIFFS.h>
+#include <ArduinoJson.h>
+#include <PubSubClient.h>
 
 const char* host = "esp32gragedoor";
 const char* ssid = "JoNelsDarlings";
 const char* password = "Paris2016";
+const char* mqtt_server = "mqtt.ddns.kawomi.com";
 
 const int buttonPin = 4;  // Reed switch - don't forget the pull down resistor.
 const int ledPin =  2;    // Internal LED
 
+boolean bForceResend=false;
 int previousState;
 WebServer server(80);
+WiFiClient espClient;
+PubSubClient mqttClient(espClient);
+#define MSG_BUFFER_SIZE	(50)
+char msg[MSG_BUFFER_SIZE];
 
 /*
  * Login page
@@ -127,6 +135,44 @@ void send_notification(String subject){
 
 }
 
+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();
+    
+    // serialize the object and send the result to Serial
+    static char sensorStatus[150];
+    serializeJson(doc, sensorStatus);
+    Serial.println(sensorStatus);
+
+    mqttClient.publish("Address/Livorno/Garagedoor", sensorStatus); 
+}
+
+void reconnect() {
+  // 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);
+    }
+  }
+}
+
+
 /*
  * setup function
  */
@@ -141,6 +187,9 @@ void setup(void) {
   // if we stat up we need to see what the status is...
   digitalWrite(ledPin, previousState= digitalRead(buttonPin));
   Serial.printf("Initial State: %d",previousState);
+
+  randomSeed(micros());
+
   // Connect to WiFi network
   WiFi.begin(ssid, password);
   Serial.println("");
@@ -171,13 +220,14 @@ void setup(void) {
   }
   Serial.println("mDNS responder started");
 
+  mqttClient.setServer(mqtt_server, 1883);
+  Serial.println("mqtt server set.");
+
   if(!SPIFFS.begin(true)){
-    while (1) {
-      Serial.println("An Error has occurred while mounting SPIFFS");
-      delay(1000);
-    }
+    Serial.println("An Error has occurred while mounting SPIFFS");
   }
 
+  //send_mqtt("rebooted");
   send_notification("garagedoor.rebooted.livorno.address");
 
   /*return index page which is stored in serverIndex */
@@ -203,7 +253,15 @@ void setup(void) {
     server.sendHeader("Connection", "close");
     boolean isOpen=digitalRead(buttonPin)==HIGH;
     server.send(200, "application/json", "{ \"isOpen\": " + String(isOpen?"true":"false") + "  }");
+    send_mqtt("statusquery");
   });
+
+  server.on("/sendmqtt", HTTP_GET, []() {
+    server.sendHeader("Connection", "close");
+    server.send(200, "text/html", "mqtt resend.");
+    bForceResend=true;
+  });
+
   server.on("/serverIndex", HTTP_GET, []() {
     server.sendHeader("Connection", "close");
     server.send(200, "text/html", serverIndex);
@@ -236,23 +294,30 @@ void setup(void) {
   server.begin();
 }
 
-
-
 void loop(void) {
   server.handleClient();
   delay(1000);
 
+  if (!mqttClient.connected()) {
+    reconnect();
+    send_mqtt("(re)connected");
+  }
+  mqttClient.loop();
+
   int buttonState = digitalRead(buttonPin);
 
-  if (buttonState!=previousState){
+  if (buttonState!=previousState || bForceResend ){
+    bForceResend=false;
     if (buttonState == HIGH) {
       digitalWrite(ledPin, HIGH);
       Serial.println("Garage Opened");
-      send_notification("garagedoor.opened.livorno.address");
+      //send_notification("garagedoor.opened.livorno.address");
+      send_mqtt("opened");
     } else {
       digitalWrite(ledPin, LOW);
       Serial.println("Garage Closed");
-      send_notification("garagedoor.closed.livorno.address");
+      //send_notification("garagedoor.closed.livorno.address");
+      send_mqtt("cosed");
     }
     previousState=buttonState;
   }