Can Photon works as stand-alone MCU w/o WIFI?

Can I use Photon as an general purpose MCU w/o IOT functionality ?

Meaning we can still use some program on it without it connecting to internet ?

Toolchain instructions here:

Disable :cloud: connection here:

http://docs.particle.io/photon/firmware/#system-system-modes

Yep, it is totally possible to use the Photon offline – just not by default.

Check out the Photon documentation regarding Systems Modes. By default is in the automatic mode which blocks the user code from executing without a WiFi/Cloud connection

SYSTEM_MODE(AUTOMATIC);

But you can switch it to semi-automatic or manual modes to allow your application to run without needing to be connected to the cloud at all. I use these modes even for applications that will connect to the Cloud so that I can get a better control over how my application functions when the network is unavailable for some reason.

SYSTEM_MODE(SEMI_AUTOMATIC); // before the setup() method

I find uploading new applications to the Photon to be more convenient over WiFi than having to connect everything over USB so even with my standalone applications I put support in to connect to the cloud when available for this purpose. No need to bother with setting up a custom toolchain and hooking up USB when you can use the cloud to do all that for you…the final result doesn’t need to rely on WiFi.

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