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Driven by the lazy to turn off the lights when in bed, an attempt was made to upgrade the existing lighting fixtures to be intelligent. Choose ESP8685-WROOM-3 (i.e., ESP32-C3), the smallest vertically mounted ESP32 module, was selected. The power supply section uses an LS05-13B05R3 flyback module. Read more
Since deploying Home Assistant, I’ve been compelled to measure and automate everything, so I urgently wanted to create a Bluetooth sensor. This project also marks my first attempt at using nRF and Zephyr with low-power optimization. The schematic is quite simple — just an nRF52832 and an SHT4x sensor, powered by a CR2032 battery. Therefore, stacking capacitors are needed to prevent restarts caused by voltage drops due to high internal resistance at low temperatures. Read more
