I will have 14 devices visiting a web page for a period of 30 day. I have no access to the devices, and want to count the visits from each device. I am coding the server side PHP too.
I don't want to use PhoneGap/Cordova or cookies. Is there a pure JS solution?
IMEI, MAC address, serial number, some fingerprint based on hardware ... anything at all, so long as I can distinguish them.
[Update] these will be new devices, fresh from the box, so fingerprinting can't rely on browser history, installed apps, etc. They will be identical except for hardware.