Pemantau Suhu Menggunakan NodeMcu, IoT dan Cayenne pada Rack Server

The server is an essential part of the service provider that needs to be maintained. The server environment factor that needs to be monitored is the ideal temperature on the server rack. This study aims to implement temperature monitoring at the server rack. This research uses NodeMCU with DHT11 and IoT sensors to monitor and measure the temperature on the rack server. Temperature data on the rack server is monitored through Cayenne and displayed on smartphones and computers, so users can monitor the state of the rack server anywhere by accessing the internet. This study uses three rack servers connected with DHT11 sensors that can monitor temperature simultaneously. The results showed that the temperature increased accordingly due to the number of active servers in each rack, so it needed to be structured evenly on the server rack. Besides, the results of the study show that the application of NodeMCU with DHT11 and IoT sensors can monitor temperature well on the rack server, where the first rack server shows an average temperature of 19.3oC, for the second rack 17.4oC and the third rack 21.8oC.