CooLinkNet is a unique cost effective hardware solution for seamless integration of the advanced single-split & multi split air conditioning units and Home Automation / BMS Controllers. Interfacing major Home Automation controllers e.g. Control4, Crestron, AMX, RTI, Savant, Vantage and many others, the CooLinkNet’s built in RS232, RS485 and Ethernet communication ports, will provide end users with control and monitoring of Air Conditioning indoor units e.g. Air Conditioning control will now be implemented from same Home Automation controller of which all other tasks like lighting, shades, security and similar are controlled. It will also enable HVAC Service Providers to access HVAC’s most essential parameters required for diagnostic and service purposes.