An ESP32, a few sensors, and MQTT are enough to build a useful monitoring device for a home, greenhouse, or small IoT system. In this project, the ESP32 reads temperature, air humidity, and soil moisture, then publishes the measurements to an MQTT broker over Wi-Fi. The same architecture can later be extended with …

When you build firmware for a microcontroller, you usually end up choosing between two patterns: the simple Arduino-style loop() or a full RTOS-based design. Both can work well, but they solve different problems. The Arduino super loop is easy to understand: run setup once, then repeatedly execute the same code in a …