Temperature Monitoring System Based on Protocol Message Queue Telemetry Transport (MQTT)

The Internet of Things based monitoring system will display temperature and humidity in the room using the Message Queue Telemetry Transport (MQTT) protocol. The mqtt protocol is one of the internet-based communication protocols, in this discussion trying to implement the mqtt protocol by transferring data consisting of temperature and humidity to be carried out in an experiment with room conditions made in such a way. Some experiments with cold, normal and hot conditions to determine whether the sensor can run well or whether the mqtt protocol can be applied. Temperature and humidity sensors DHT 11 will produce data in the form of temperature and humidity that will be connected to node MCU as a microcontroller that has access to connect data to the internet using a Wi-Fi network. The broker used is broker.mqqttdashboard.com. The clients that can monitor temperature are a laptop and android, on a laptop using MQTT Box while on Android using the MQTT dashboard application. The data obtained will display 3 conditions of temperature and humidity, when cold conditions, the average value of temperature and humidity are 15.04°C and 69.39%. Normal conditions of average values of temperature and humidity are 31.31°c and 87.95%. Hot conditions average values of temperature and humidity are 40.65°C and 95%.