ESP32 Wi-Fi Development Board

Brand: Cloudfree

The ESP32 is the successor to the ESP8266 board.It has several additional features, such as

  • Bluetooth
  • Capacitive Touch Sensor
  • Hall Effect Sensor
Sale price$6.50
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Using the ESP32's capacitive touch capability, you can create a bed occupancy sensor on the cheap using ESPHome.

The ESP32's Bluetooth capabilities are useful for projects such as room presence detection.