On Tuesday I can help you design and implement a circuit to allow the pi to control the striker.
Ray Scheufer
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The keys are the rfid ones we currently use to access the space.
When we do implement it, I'm open to using whatever works. The current working idea was to swap out the RFID reader that is on the door with the new one. We would just leave everything else in place.
If you have stuff or ideas you want to try, its fairly simple. the pi will make a pin go high after authenticating a tag. It reads tag tags from a text file. Feel free to use the one setup at the space.
We did the mockup and documentation with adafruit stuff because the materials are accessible (in the case that someone else wanted to do the same thing in the future).