Simple temperature and rel. humidity Lora-Wan sensor based on the DHT22 and RFM95/RFM96 in interaction with an Arduino Nano.

The special feature of this version is the use of the Lora radio standard in combination with the Lora-Wan protocol. This allows the reception of sensor data over many kilometers. To enable the transmission of the sensor data to the Internet, a decentralized network of receiving stations (gateways) is used. These are usually provided by private individuals or companies.

Another advantage of this architecture is that not everyone needs a gateway who wants to send data with his Lora-Wan device. Of course, only as long as a gateway is in range. For this purpose, there are ready-made maps that show the coverage at a location.

These gateways can send their data to a server on the Internet, which then provides them as e.g. REST api. In this case we use the TTN provider The Things Network (TTN).