mqtt_test.ino

mqtt_test.ino

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include "/usr/local/src/ap_setting.h"

// Update these with values suitable for your network.


char* topic   = "/30/Status/MQTT";
char* subtopic = "inTopic";
char* hellotopic = "HELLO";

IPAddress server(192, 168, 10, 10);
WiFiClient wifiClient;
PubSubClient client(server, 1883, callback, wifiClient);

long lastMsg = 0;
char msg[50];
int value = 0;
long lastReconnectAttempt = 0;

void setup() {
  pinMode(2, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  Serial.begin(115200);
  setup_wifi();
  //lastReconnectAttempt = 0;
}

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Switch on the LED if an 1 was received as first character
  if ((char)payload[0] == '1') {
    digitalWrite(2, LOW);   // Turn the LED on (Note that LOW is the voltage level
    // but actually the LED is on; this is because
    // it is acive low on the ESP-01)
  } else {
    digitalWrite(2, HIGH);  // Turn the LED off by making the voltage HIGH
  }

}


boolean reconnect() {
  if (!client.connected()) {
    if (client.connect("arduinoClient")) {
      // Once connected, publish an announcement...
      client.publish(hellotopic, "hello world");
      // ... and resubscribe
      client.subscribe(subtopic);
    }
  }
  return client.connected();
}

void loop()
{
  if (WiFi.status() == WL_CONNECTED) {
    if (!client.connected()) {

      Serial.print("failed, rc=");
      Serial.println(client.state());

      long now = millis();
      Serial.println("MQTT disconnected....");

      if (now - lastReconnectAttempt > 5000) {
        lastReconnectAttempt = now;
        if (reconnect()) {
          Serial.println("MQTT connected....");

          lastReconnectAttempt = 0;
        }
      }
    }  else {
      long now = millis();
      if (now - lastMsg > 30000) {
        lastMsg = now;
        Serial.println(client.state());
        client.publish(topic, "on");
      }
      client.loop();
    }
  } else {
    setup_wifi();
  }
}

November 16, 2015 at 4:05:25 AM GMT+9d65cca6a.29a338
/30/Status/MQTT : msg.payload : string [2]
on
November 16, 2015 at 4:05:55 AM GMT+9d65cca6a.29a338
/30/Status/MQTT : msg.payload : string [2]
on
November 16, 2015 at 4:06:25 AM GMT+9d65cca6a.29a338
/30/Status/MQTT : msg.payload : string [2]
on
November 16, 2015 at 4:06:55 AM GMT+9d65cca6a.29a338
/30/Status/MQTT : msg.payload : string [2]
on