====== Configuration mode example ======

The code allows entering configuration mode when the button is pressed.

<code>lib_deps = ITTIoT</code>

<code c>
/*
 * IoT Configuration mode example
 *
 * IoT Button module is needed. When button is prsessed then module goes to 
 * the config mode
 *
 * Created 04 March 2021 by Heiko Pikner
 */
// Includes global variables and librarys that the RGB LED and buzzer uses
#include <Arduino.h>
#include <ittiot.h>

// Switch state to trigger restart only once.
int swState;

// Message received
void iot_received(String topic, String msg){}

// Function started after the connection to the server is established.
void iot_connected()
{
  // Send message to serial port to show that connection is established.
  Serial.println("MQTT connected callback");

  // Send message to MQTT server to show that connection is established.
  iot.log("IoT Boot mode sample!");
}

void setup()
{
  // Initialize serial port and send message
  // setting up serial connection parameter
  Serial.begin(115200);
  Serial.println("Booting");

  // print IoT json config to serial
  iot.printConfig();
  // Initialize IoT Button module switch pin D3 (0) as a boot pin.The pin was read, when module boots up.
  iot.setBootPin(0);
  // Initialize IoT library
  iot.setup();
}

void loop()
{
  // IoT behind the plan work, it should be periodically called.
  iot.handle();
  delay(20);

  // Read the switch pin to force restart the module if it is in normal or config mode.
  if(!digitalRead(0) && !swState)
  {
    iot.restart(ITT::configMode);
    swState = 1;
  }
}
</code>