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/***************************************************
Adafruit MQTT Library ESP8266 Example
Must use ESP8266 Arduino from:
https://github.com/esp8266/Arduino
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Tony DiCola for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
#include <ESP8266WiFi.h>
#include <Adafruit_MQTT.h>
#include <Adafruit_MQTT_Client.h>
/************************* WiFi Access Point *********************************/
#define WLAN_SSID "...your_SSID..."
#define WLAN_PASS "...your_password..."
/***************************** Your Setup ************************************/
#define YOUR_SERVER "...your_mqtt_broker_host..."
#define YOUR_SERVERPORT 1883
#define YOUR_USERNAME "...your username..."
#define YOUR_PASSWORD "...your password..."
/************ Global State (you don't need to change this!) ******************/
// Create an ESP8266 WiFiClient class to connect to the MQTT server.
WiFiClient client;
// Store the MQTT server, client ID, username, and password in flash memory.
// This is required for using the Adafruit MQTT library.
const char MQTT_SERVER[] PROGMEM = YOUR_SERVER;
const char MQTT_CLIENTID[] PROGMEM = __TIME__ "_test_client_id";
const char MQTT_USERNAME[] PROGMEM = YOUR_USERNAME;
const char MQTT_PASSWORD[] PROGMEM = YOUR_PASSWORD;
// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, YOUR_SERVERPORT, MQTT_CLIENTID, MQTT_USERNAME, MQTT_PASSWORD);
/****************************** Topic ***************************************/
// Setup a pubulisher & subscriber.
const char TEST_TOPIC[] PROGMEM = "test";
Adafruit_MQTT_Publish testPublisher = Adafruit_MQTT_Publish(&mqtt, TEST_TOPIC);
Adafruit_MQTT_Subscribe testSubscriber = Adafruit_MQTT_Subscribe(&mqtt, TEST_TOPIC);
/*************************** Sketch Code ************************************/
void setup() {
Serial.begin(115200);
delay(10);
Serial.println(F("MQTT demo"));
// Connect to WiFi access point.
Serial.println(); Serial.println();
Serial.print("Connecting to ");
Serial.println(WLAN_SSID);
WiFi.begin(WLAN_SSID, WLAN_PASS);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println();
Serial.println("WiFi connected");
Serial.println("IP address: "); Serial.println(WiFi.localIP());
// Setup MQTT subscription.
mqtt.subscribe(&testSubscriber);
}
uint32_t x=0;
void loop() {
// Ensure the connection to the MQTT server is alive (this will make the first
// connection and automatically reconnect when disconnected). See the MQTT_connect
// function definition further below.
MQTT_connect();
// this is our 'wait for incoming subscription packets' busy subloop
Adafruit_MQTT_Subscribe *subscription;
while ((subscription = mqtt.readSubscription(1000))) {
if (subscription == &testSubscriber) {
Serial.print(F("Got: "));
Serial.println((char *)testSubscriber.lastread);
}
}
testPublisher.publish(1);
delay(1000);
}
// Function to connect and reconnect as necessary to the MQTT server.
// Should be called in the loop function and it will take care if connecting.
void MQTT_connect() {
int8_t ret;
// Stop if already connected.
if (mqtt.connected()) {
return;
}
Serial.print("Connecting to MQTT... ");
while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
Serial.println(mqtt.connectErrorString(ret));
Serial.println(ret);
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000); // wait 5 seconds
}
Serial.println("MQTT Connected!");
}
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