OTAA joining issue

We’ll need many more details.

In TTN Console:

  • Did you delete the devices from the application before you deleted the old application?

  • Did deleting the application give you any warning about the existing devices?

  • Which of the details are the same as in the previous registration: DevEUI, AppEUI and/or AppKey?

  • Did registering the devices in the new application give you any warning/error about an existing DevEUI?

  • Does clicking the OTAA Join Requests in the gateway’s Traffic page (orange icons) give you any more details about what might have gone wrong?

And as for the devices:

  • Did you change anything in the devices?

  • Can you program the devices yourself? (Like to change the AppEUI, AppKey or even the DevEUI.)

Related: How can I reuse hardcoded AppEUI and AppKey after I deleted an application?