Secure Offline Smart Office Automation System Using ESP32 and Bluetooth Control Architecture

This paper describes the development and deployment of an affordable and secure smart office automation system which is completely offline and it use Bluetooth technology and ESP32 microcontroller. In situations where internet access is limited or security is of utmost concern, the system provides an app-based control over the office devices like lighting, blinds, door access and alert systems, in real- time. The design eliminates dependence on the cloud, which in turn mitigates security threats from the outside, meanwhile, local Bluetooth communication shortens response time and cuts power consumption. Primary security requirements are direct device linking, local command control and encryption-capable communication protocols. Experimental results substantiate quick response of devices (<150) ms, low power consumption and robustness in the indoor range of Bluetooth (10 m). The device is designed to be modular to enable extension of the system itself including however not limited to environmental sensors, GUI based mobile applications and cutting edge authentication protocols. This paper presents proof to ant small-to-medium sized enterprises about the availability of a secure and offline smart office system which is cost-effective, user-friendly and immune against security threats from outside.