If you have another device (Core/Photon/P1/Electron) you could try this - https://github.com/m-mcgowan/embedded-swd
It’s still in beta but it can be used to revive devices. This will try to fix things so that you can get into DFU mode.
If you have another device (Core/Photon/P1/Electron) you could try this - https://github.com/m-mcgowan/embedded-swd
It’s still in beta but it can be used to revive devices. This will try to fix things so that you can get into DFU mode.