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).