Can't upgrade base image on Bluz DK

I have a ton of Bluz DK, I have successfully and painlessly claimed them. I can ping them and see the logs. But I can't deploy any code on it because the image on the device is 1.x.x.

When I am asked to upgrade 2+, I answer (happily) yes and the dialog fails with no errors or action on my end.

@Support

It has not been possible to use a Bluz device on the Particle platform for several years. You were able to claim the gateway because it's just a Photon 1, but there is no cloud support for the DK devices connected through the gateway.

thanks for that info.
since I am able to call functions in the last firmware that was deployed is there any way to flash them?
I don't care about the gateway, I can use the phone which connects just fine. Thanks for any help, it's for our school, I have 500+ of those brand new units (donated)

You won't be able to flash the Bluz DK units from the Particle cloud, but if I recall correctly they're a Raytac module with some Nordic nRF BLE chipset on it, so you can probably use the Nordic tools to write firmware and flash them, but I've never tried it.

@eely22 Hey Eric, I thought of mentioning you in case can you can assist here. Cheers,
I know it's been a while and Bluz is long gone.

Correct, Particle stopped supporting all bluz devices on their platform a few years ago. The docs are still alive, for reference, and there are ways to program the board locally, but you wouldn't be able to use any of the cloud functionality. Only local communication would be possible and it would require additional hardware to program the boards.

Curious as to where you got so many boards from? There was no single person or company that purchased that many.

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What hardware do I need to program them locally? The USB can't detect the device once plugged in.

About calling the functions: I can effectively call the functions for the last firmware that was on. Although that would have be nice, right now I would be super happy if I can get the students to use the hardware for any type of project. Given how long it takes to procure anything of any kind.

they come from many-many donations over a period of a some months. For some reason a few were already hosting the latest deviceOS so given the success of using them we requested more donations of the same. Not aware that we were going to have this hiccup.

Any help on how to them them going (locally is more than fine) will be of a huge help - thanks!!!

Hey, for the ones that can connect to a GW, I had a lot of fun with my BLUZ long time ago when I connected it with Blynk.
Blynk may open posibilities for your students, so here's the project I did in case it helps:

Best,