the Electron is a cellular only device and the Photons are WiFi only so there is no means for the two to communicate with each other wirelessly. If the area where they are to be deployed has no WiFi the photons won’t be able to be updated, sync time or do any of the other things they are designed to do over the network.
you could approach this several ways:
- Make the photons much simpler Arduino devices connected back to the Electron via a serial bus - something like RS485.
- Buy a small 3G WiFi router and connect all your photons to that.
- Use Bluz.io boards instead - so an electron in the gateway and then Bluz.dk modules instead of photons for your multiple devices connected to it.
Of course an electron can talk to many devices&sensors over all sorts of wired and wireless connections so you should always be sure you need multiple smart devices connected to your gateway.