Ok, I bit the bullet and tore one open
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This is my current state of figuring out the schematics of an aurora panel.
There are a few uncertainties here.
* I could not figure out the exact type of the transistors. I've annotated some markings on the case but it is not at all clear what the model exactly is. Hence the unspecific drawing.
* The transistors for the LEDs (Q1-Q4) are marked "2X" and then a "F" rotated 90° to the left with two dots beneath it. I did not find the manufacturer using that Logo.
* The power regulator (marked "Y1") is unclear to me.
* Q4 = Red, Q3 = Blue, Q2 = Green, Q1 = White (EDIT: just tested it, my original assumptions were wrong and I have corrected them here)
* Yep, the four pins is the programming header.
* The µC unfortunately has some pads not accessible from the outside and I am not 100% sure if everything is assigned correctly. I am surprised in particular that apparently RX is not at Pin 17.
I appreciate any hints regarding these matters.
May this be of use to somebody
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Bye,
Simon