MKR1000 Message of the Day

// include the library code:
#include <LiquidCrystal.h>
#include <PubSubClient.h>
#include <WiFi101.h>


// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 4, 5, 11, 3, 2);

// Network settings
char ssid[] = "iPhone";     //  your network SSID (name)
char pass[] = "xxxxxx";  // your network password

// Server settings
char * server  = "yerr server";
const int port = 8883; // Need to add certificates via Firmware Updater

// MQTT settings
char * client_id     = "arduino_mkr1000"; // your thing name
char * mqtt_username = "user"; // your mqtt username, null if not used
char * mqtt_password = "pass"; // your mqtt password, null if not use
char * topic0        = "motd";
int status = WL_IDLE_STATUS;     // the Wifi radio's status

// Client settings
WiFiSSLClient sslClient;
PubSubClient client(sslClient);

void setup() {
  Serial.begin(115200);
  while (!Serial);
  // set up the LCD's number of columns and rows:

  // Print MOTD
  lcd.begin(16, 2);
  lcd.print("      MOTD");


  Serial.println("Initializing");
  Serial.println(WiFi.status());
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue:
    while (true);
  }

  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to WPA SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network:
    status = WiFi.begin(ssid, pass);
  }

  // you're connected now, so print out the data:
  Serial.println("You're connected to the network");
 
  client.setServer(server, port);
  client.setCallback(on_message);



  // Allow the hardware to sort itself out
  delay(1500);
}

void on_message(char* topic, byte* payload, unsigned int length) {
    Serial.print("Got message: ");
    String message;
    for (int i = 0; i < length; ++i) {
      Serial.print( (char)payload[i] );
      message += (char)payload[i];
    }
    Serial.print(" length: ");
    
    Serial.println(length);
    if ( length <= 16 ) {
      lcd.clear();
      lcd.begin(16, 2);
      lcd.print("      MOTD");
      lcd.setCursor(0,1);
      lcd.print(message);
    }
}

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

void subscribeAll() {
  // Subscribe to all topics here.
  client.subscribe(topic0);
  Serial.println("Subscribing to topics..");
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}