CM³ Centralised Mode Management Machine

The CM³ Centralised Mode Management Machine operates as a distributed smart home automation and security surveillance engine. At the heart of the system is the ESP32-S3 Box 3 master controller, which features a graphical user interface rendered via LVGL and LovyanGFX. This master node coordinates overall system behavior and communicates wirelessly with two ESP32-C3 or C6 slave nodes over a local network using the PubSubClient MQTT library. The slave nodes are housed in separate PVC enclosures and are deployed across different zones to gather environmental and security data. Each slave node interfaces with a DHT22 temperature and humidity sensor, an LDR light-dependent resistor for ambient light detection, a PIR motion sensor for intrusion detection, and an AQI sensor like the MQ135 to monitor air quality. Additionally, each slave node controls local hardware through relay modules and user inputs from switches. The system reads environmental states and motion triggers at the edges, publishes these parameters via MQTT to the central master, and dynamically executes automation routines. Operational configurations and user preferences are persistently stored on the microcontrollers using the Preferences library. The integration of local sensor telemetry, centralized graphical monitoring, and distributed relay control allows the system to autonomously manage security surveillance and indoor climate parameters.