We have some doors that already have basic open/closed electic loop built in (micro switch based, unknown system, something like older version of https://www.adiglobaldistribution.us/Catalog/shop-brands/camden-door-controls/CM-CXED179DL), but the wires are not connected to anything at the moment. I would like to install a unit that detects if each door is locked and sends the information wirelessly to a central unit that can show something like door 1 = locked, door 2 = locked etc. on a screen or through LEDs. All system parts can have access to voltage, but batteries are also fine.
Are there off-the-shelf systmes that can fit this description? Or do I need to invent it myself using Arduinos?
I specifically need a central display unit and therefore apps do not cut it, I also need to use the existing lock sensors, simply checking that the door is closed in not enough.
