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hysteresis

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Project made to learn electronics and ESP32 programming. A self-contained device with OLED display and all parts in an enclosure. The screen shows temperature, humidity and pressure from Home Assistant via MQTT. DS18B20 measures internal temp; a fan is driven by ESP32 with N-MOSFET and hysteresis to prevent overheating.

  • Updated Sep 15, 2025
  • C++

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