Well. That worked
I was kind of thinking it may not for some reason.
The marketing for the adapter led me to beleive the microusb port on the adapter was only so you could charge the tablet as well whilst outputting mhl/hdmi. Makes sense.
Turns out it needs that power to operate at all, it does not draw from the tablets microusb output
So after testing with the tv on wall power, I strapped an external phone battery charger and small cable I had lying around, and its all good.
The lag is not much more, seems similar to looking at the tablet. Its definetly not as good as the hdmi out, so software extended telemetry over hdmi would be much better.
The resolution is not as clear on the googles as looking at a tablet, but still very useable and immersive.
I tell you, its night and day with the telemetry, battery, signal, sats. I ran a full test flight and didn't take the googles off to look at the screen once. For some reason it made me want to explore more with the drone vs squinting at the tablet in the sunlight which definetly takes you out of the birds perspective in comparison.
You will need to be very careful with cable management to prevent any duress on the hdmi adapter out the side of the tablet. Mine was already pulled loose before I started and it was brand new (admittedly it came in a package that was resealable).
I'll check with the supplier and get them to swap it / check with their others make sure its not a design/batch fault with this particular one. My guess is any mhl hdmi adapter will work. Not even sure if the tabs 8.4 is making use of the mhl3 spec. But I guess it doesn't hurt to stick with the latest spec.
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