Using SX1272 mbed shield on a Nucleo L073.
Working fine with the Keil LRWAN_V1.1.2. Can connect and transfer payloads.
But lorawan-demo-72 load OK shows the Serial Display but sits here to “Joining”.

What can be changed to the board or else to make it work on this demo MBED software?

Did you well specified your local mbed_app.json file in the loawan example application ?

Jerome thank you for an answer.
I have no idea where is this json file.
I am using the web online mbed.
Regards jean-marc

I advice to use mbed-cli,
and have a look on GitHub - ARMmbed/mbed-os-example-lorawan: Simple LoRaWAN example application for mbed OS