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Last Arduino/ESP8266 project (click to open)
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Hardware:
Very affordable on Banggood/AliExpress. For configuration examples see images and/or Fritzing (in the download).
Total cost: ~$/€ 12.00.

  • Sonoff ESP8266 module
  • Waterproof DS18B20 Digital, 1-Wire, temperature sensor
  • 4.7KΩ resistor
  • 0.5m/yd 3-wire cord with plugs