Aqua-tan Smart Cooler

For my home aquarium, I am developing distributed smart management system with several components using ESP-WROOM-02 boards.
The components are cooler, feeder, light, pump, and environment monitor.

Smart cooler

Smart Cooler is simple. It has cooling fan and thermometer for water temperature.
The ESP-WROOM-02 provides a Web interface (and also Web APIs) for parameters and metrics. We can set higher and lower bounds of temperature via Web and the cooling fan is activated according to the current water temperature.