A communication interface gateway to communicate the data between web server and controller/level transmitter. UART protocol is used for communication between GSM and controller/repeater. It can also receive data wirelessly from multiple wireless transmitter units and upload the data to server. This is equipped with IOT sim to provide seamless connectivity with server even in remote locations with low network strength. It has OLED display to show critical parameters. It is designed to operate in harsh environment of outdoor application.