Adding Xenon to a remote mesh

I have a site installation with a Boron, and currently a single Xenon. I wish to add multiple Xenon units to that installation to act as repeaters.

As it is cumbersome to do this at a remote site, is there a way I can use to:

  1. Upload firmware to the new Xenon via its USB? (I realize I can do that with an Argon locally as a gateway but was wondering if there is a different way)

  2. Have the Xenon join the mesh at the remote site without scanning the Boron’s QR code?

I would appreciate the community’s input.

Uhm, yes - as always particle flash --usb firmware.bin

Nope, not so far.