2.4.1 Publishing Data to Google Cloud

An MQTT publish packet is always sent to the MQTT broker using a specific topic. The AVR-IoT WG Development Board publishes messages using the topic ‘/devices/{deviceID}/events’ in communication to the AVR-IoT WG. The messages published on this topic contain the real-time data obtained from the on-board light and temperature sensors. The frequency of sending a PUBLISH packet can be decided by the user application. The application is written such that the sensor data is published to the Cloud every one second.