CoolMasterNet is a unique hardware solution for seamless integration of the advanced VRF / Split Air Conditioning Systems and Home Automation / BMS Controllers. Interfacing major Home Automation controllers e.g Control4, Crestron, AMX, RTI, Savant, Vantage and others , through CoolMasterNets built in RS232, RS485 and Ethernet communication ports, will provide home end users with full control and monitoring of Air Conditioning indoor units e.g Daikin, Mitsubishi, Toshiba, Fujitsu, LG, Hitachi, Gree and others. Air Conditioning control will now be implemented from same Home Automation controller of which other tasks like lighting, shades, security and similar are controlled. It will also enable HVAC Service Providers to access HVACs most essential parameters required for diagnostic and service purposes.