Smart Relay for Controlling and Monitoring Electronic device Using Real Time Database

Abstract

The Smart Relay using microcontroller, that equipped with relay, voltage and current sensor to monitor and control electricity usage over a website, the system can remote and scheduler the relay for switch on/off, also could monitor the voltage and current usage, the sensor data send to real time database using internet connection for displayed on a website. Test results showed the capability of the system to control the relay with an average delay on 4G network is 1.76 seconds, error of measurement voltage sensor is 1.47%, and 1.67% for current sensor, with an average delay is 6.48 seconds for voltage sensor, and 4.02 seconds for current sensor on 4G network.