<![CDATA[This research presents the development of an Internet of Things (IoT)–based system for monitoring brake fluid condition and preventing vapour lock by integrating a Type-K thermocouple with the MAX6675 amplifier, ESP32 microcontroller, relay-controlled Peltier cooling module, and Blynk cloud. The system aims to provide early detection of temperature rise beyond the dry boiling point of DOT 3 brake fluid, which significantly decreases when moisture is absorbed during vehicle operation. A series of laboratory tests was conducted to evaluate sensor accuracy, response time, system stability, and real-time notification performance. Calibration results showed that the thermocouple demonstrated stable readings with only minor deviations relative to a reference thermometer. Functional testing indicated that the cooling module and warning indicators operated reliably at predefined thresholds. The system successfully sent temperature notifications and risk warnings through Blynk with minimal latency. These results indicate that the proposed IoT-enabled device can serve as a preventive safety solution by offering continuous monitoring and early detection of vapour lock risk.]]>
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