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Mastering Arduino by Jon Hoffman

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Components needed

For these, projects you will need the following items:

  • One Arduino Uno or compatible board
  • One HM-10 Bluetooth 4.0 module
  • One DHT-11 temperature sensor
  • One LED
  • One 4.7K resistor
  • One 3.3K resistor
  • One 1.1K resistor
  • One 330k resistor
  • Jumper wires
  • Breadboard

You will need a Bluetooth LE app for your phone/tablet or computer. I use the BTCommander – Serial port HM10 (https://itunes.apple.com/us/app/btcommander-serial-port-hm10/id1312640906?mt=8) app on my phone. There are plenty of other apps, such as the nRF connect app for Android (https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp&hl=en_US) and iOS (https://itunes.apple.com/us/app/nrf-connect/id1054362403?mt=8).

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