How many applications would one need for multiple sensors?

Use Cases
3

As for clients:

  • If you’re going to sell devices, for which you won’t know how clients will use them, your only choice is OTAA, with a unique AppEUI for each device. If a single client wants to use multiple devices, then multiple AppEUIs can be added to a single Application, if that’s what they want.

  • If you’re going to sell services (which come with a device, which should only be used for that service) then you could use a single AppEUI (and hence: single Application) for all devices, and within your service implement your own authentication mechanism to ensure clients can only see devices linked to some account.

    But even then it will be much nicer to allow buyers to use the device any way they like. So again a unique AppEUI per device (or a way to reprogram the device) would be best. The ttnctl command line interface or the Application Manager API can be used to easily register many AppEUIs to a single application.

Slightly related: How to best write an application that contains many nodes with different measure data types.

1 Like