So I switched to completely doing this on my own by buying the listed items under https://www.openhardware.io/view/49/NFC-to-HTTP-Gadget
I hope that this will work even though I don’t know wheater I will use http or mqtt to pass the key ids to HA.
Anyone a suggestion on that?
In HA, I guess I should create some sort of software switch that can be turned on / off using a simple script that evaluates the given codes.