I think there are some news in this field and didn't want to create a new thread - that is why I revive. I think there has been some work done in 0.8.0 for us to know what was the reason Photon/Electron woke up.
I read about it here : Particle Firmware Updates Thread:
If you read some more on Github you might see that even deep sleep was mentioned.
So the questions is (@peekay123 could you help since I've seen your comments in that conversation on github?) : do we (since 0.8.0-rc.2) have a new tool for Photon and Electron to know what was the reason for the device to wake up from deep sleep, or I misinterpreted something? If that is true, could somebody please share some method for using this? I would be grateful since I have to solve exactly this problem for Electron right now, and don't know should I use all of the DIY alternative methods, or is there an actual flag for knowing why Electron woke up from deep sleep, thanks.