A wireless system has many benefits over a wired system, such as increased efficiency, lower cost, mobility, and ease of access. The client wants to upgrade their existing HVAC system product with a wireless system. For that, We have to develop a wireless system for the client. There are various modules covered in the system such as Control Gateway, Thermostat controller, HVAC Control module, and Wireless Damper controller. An easy-to-access system via a mobile application and also centralized data storage over the cloud.