Drone video read what I said again.
To turn IPS on... IPS.
The collision avoidance switch to the central position. Left control lever left corner.. toggle the top right switch 4 times quickly the typhoon will now make a sound, IPS is now on and displayed in purple in the corner of the handset on motor start up.
For confirmation speak to your local yuneec customer service.
I will admit that I misread your post sorta - to me the OA and IPS are the same module so I jumped to the conclusion you were speaking about the RealSense features - after a read your post again as suggested, its clear you mean ONLY the IPS portion of RealSense.
However I stand by my original opinion (no reflection on you personally) that this is a rather silly way to turn on IPS! Seems like an after thought. I spoke to Yuneec in the USA after I got my TH, and they told me to not bother flying it indoors as you had to turn off GPS and it was kinda quick to respond making it hard to fly indoors and suggested to not try it even. I will admit that I have never tried it and in that entire conversation with Yuneec they said all I had to do was turn off GPS and the IPS would work.
In post number #8 you say to toggle the flight mode switch - in post # 11 you say to toggle the OA switch - which means I have to ask you for clarification on which switch truly you mean?
Further to that (and ONLY a reflection on yuneec) they said to never take off with the OA switch in any position other than all the way up. Plus, if you are toggling the Flight mode switch that could mean you are in the smart mode exclusion zone potentially and the drone could fly away a random direction if your within that circle? maybe that doesnt matter if its on the ground I guess...
Again, not questioning YOU - but if this is in fact true and the way to activate it, it leaves lots of room for something bad to happen, but as mentioned earlier you have two conflicting directions in your posts on which switch to actually toggle, I'm sure thats an oversight, but we should clear that up before anyone tries it.
Have you tried this activation procedure? how (if using the Flight mode) did you toggle the flight mode? from Pilot to RTH, Pilot to Smart, or Smart to RTH? did the craft do anything when you toggled these modes like we could expect when its in smart mode? if you used the OA switch, did you toggle from middle position to top, middle to bottom, or top to bottom, or bottom to top (or did it even matter)?
I like to get your account of how this procedure went for you. I suspect, if you have already tried it, that everything was fine as you have not reported any issues, but Id like to know. I don't plan to fly it indoors anytime soon - but you have peaked my interest.
I guess this is why the forum members have decided to write a manual together, seems like lots of stuff is left out of what yuneec provides.