IoT Device Health Monitoring Over MQTT

The IoT Device Health Monitoring system functions by utilizing the processing capabilities of the ESP32-C3 Super Mini microcontroller to gather internal telemetry data and transmit it wirelessly to a remote dashboard. Once programmed using the Arduino IDE or ESP32 toolchain, the microcontroller continuously evaluates its own internal parameters, including CPU utilization, available RAM, Wi-Fi Received Signal Strength Indicator (RSSI), and internal chip temperature. To connect to the network, the ESP32-C3 leverages its built-in Wi-Fi capabilities to link with a local wireless access point, which can be shared via a Wi-Fi-enabled smartphone. After establishing a connection, the device uses the MQTT (Message Queuing Telemetry Transport) protocol to publish the collected health metrics as data packets to an MQTT broker. A laptop or PC is used initially to write and flash the firmware via the USB Type-C cable. For local visual feedback, an optional breadboard and LED can be wired using jumper wires to indicate connection status or data transmission activity. On the receiving end, the IoT MQTT Panel application installed on a smartphone or other device subscribes to the MQTT topics, allowing the user to view real-time telemetry updates and monitor the health and performance of the hardware remotely.