Arduino WiFi101 MQTT Example (using PubSubClient by Nick O'Leary)

ArdunioMQTTExample.ino

#include <SPI.h>
#include <WiFi101.h>
#include <PubSubClient.h>

char ssid[] = "XXXXX";        // your network SSID (name)
char pass[] = "XXXXXXXXX";    // your network password (use for WPA, or use as key for WEP)

int status = WL_IDLE_STATUS;


WiFiClient wificlient;
PubSubClient mqttclient(wificlient);


void setup() {

  WiFi.setPins(8,7,4,2);
  
  // attempt to connect to WiFi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);

    // wait 10 seconds for connection:
    delay(10000);
  }
  Serial.println("Connected to wifi");

   if (mqttclient.connect("arduinoClient", "testuser", "testpass")) {
    mqttclient.publish("Coop/Outside/Temperature","88");
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  if (!mqttclient.connected()) {
    reconnect();
  }
}

void reconnect() {
  // Loop until we're reconnected
  while (!mqttclient.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (mqttclient.connect("arduinoClient", "testuser", "testpass")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(mqttclient.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}