No..
S3 use new much more upgrades SOC (processor) - you can't upload new firmware to old hardware.
You can check in AI menu - You should have there options like AcuPick or VideoMetaData, which weren't possible on old camera due lack of power..
Yes, AcuPick is there though i have no idea how to use ot yet. Lol
There's also the alarm wires and extra connections on the harness. P.s, how do you trip the alarm? Is it just as simple as shorting 2 wires? Or is it a signal? Edit, i guess it looks like it requires a voltage to operate a relay in the cam?
Then there's the mic in. Is it just a regular line in that i could attach any line level audio to test it such as the audio output from a radio at line level?
Edit: I tested the line in with a small pocket radio with an audio out and it worked. I could hear the radio in the cam when I selected line-in in the cam software.
UPDATE:
On the alarm wires, yellow to black I get 3v, orange to black I get 0 ohm when I trigger alarm, I get no continuity when not triggered, doing this from browser.
I know the S1 version doesn't have these features and the S2 I'm not sure. Is this a good indicator that this is in fact an S3 version, along with the ability to run proper firmware and acupick like was mentioned earlier?