How to set WiFi data for customers using embedded spark.core

[Moors7]

@Mr_James

You mention being able to connect to the photons hotspot and entering the WiFi credentials there.

I'm not sure where I said that, but I'll take your word for it...
The Photon and Core use different technologies, so make sure you don't mix them up. The Core kinda "throws" credentials through the ether where they can be picked up, whereas you make a connection with the photon. How they work exactly, I don't really know.
I think this thread might contain some useful information in regard to the softAP setup process, and what possibilities there are/might be:

Photon softAP usage?

Just a simple question - is the photon softAP mode for wifi client configuration only, or can it be normally used together with a client ? And how about the wifi mesh - this was not possible with core, how about photon ? I’m thinking about tens of photons chained together (with only first of them being in the range of the wifi AP), talking with each other. Using spark cloud (if possible) or any other network communication method if not.

You can always check the docs for information on how to connect your devices: https://docs.particle.io/guide/getting-started/start/photon/#step-2-connect-with-your-smartphone