The goal was to build a compact smart telemetry controller for vending / retail equipment to manage and monitor key parameters in real time.

The system controls internal/external temperature, airflow, and product weight, and also performs power consumption monitoring.

The solution supports remote and automatic operation, with configuration and control via mobile and desktop applications.

Connectivity and backend control were implemented through a server using the MQTT protocol, combining WiFi + LTE (Quectel) for reliable field operation.

Hardware stack includes STM32, 24-bit ADC, eSIM.