A device is registered to an application. So, first create an application; this does not (yet) use any of the values provided with your sensor so just use whatever you like. After creation, go into the application’s settings and select “EUIs”:
- APPEUI goes into “Add EUI”, for which you first need to click the pencil icon to customize the value; see Registration of node with pre-configured LoRaWAN keys
Next, add a device to that application. While doing that:
- DEVEUI goes into Device EUI
- APPKEY goes into App Key; first click the pencil icon again
- APPEUI is selected from the dropdown (as entered in the application above)
Product code and serial number are not used.