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Feather.printNetwork();

// Tell the MQTT client to auto print error codes and halt on errors

mqtt.err_actions(true, true);

// Set ClientID if defined

#ifdef CLIENTID

mqtt.clientID(CLIENTID);

#endif

// Last will must be set before connecting since it is part of the connection data

mqtt.will(TOPIC, WILL_MESSAGE, MQTT_QOS_AT_LEAST_ONCE);

// Connect to broker

Serial.printf("Connecting to " BROKER_HOST " port %d ... ", BROKER_PORT);

if (USE_TLS)

{

// Disable default RootCA to save SRAM since we don't need to

// access any other site except test.mosquitto.org

Feather.useDefaultRootCA(false);

// mosquitto CA is pre-generated using pycert.py

Feather.addRootCA(rootca_certs, ROOTCA_CERTS_LEN);

// Connect with SSL/TLS

mqtt.connectSSL(BROKER_HOST, BROKER_PORT);

}else

{

mqtt.connect(BROKER_HOST, BROKER_PORT);

}

Serial.println("OK");

// Subscribe with callback

mqttTopic.subscribe(subscribed_callback);

Serial.println("Please use desktop client to subcribe to \'" TOPIC "\' to monitor");

// Inital publish

Serial.printf("Publishing \'%d\' ... ", value);

mqttTopic.print( value ); // use .write to send in binary format

Serial.println("OK");

}

/**************************************************************************/

/*!

@brief This loop function runs over and over again

/**************************************************************************/

void loop()

{

// value changed due to subscribed callback

if (old_value != value)

{

// check if still subscribed

if ( mqttTopic.subscribed() )

{

old_value = value;

Serial.println();

Serial.printf("Publishing \'%c\' ... \r\n", value);

mqttTopic.print( value ); // use .write to send in binary format

}