Fixing ip addresses is not uncommon. Normally dhcp servers issue addresses out of a certain range, and leave another range explicitly 'free' for fixed addresses. The range, if not documented, becomes apparent if you look into it, like, when you see that the first address handed out ends on .128. Also, I believe no dhcp server will issue an address if it can be pinged.
Another idea would be adjust the boot script so that it starts its own AP if it cannot ping the vesper. But that device looks sturdy enough.
Another idea would be adjust the boot script so that it starts its own AP if it cannot ping the vesper. But that device looks sturdy enough.