The objective of this project is simple. We need to add a wireless door contact sensor to our kitchen back door, which is integrated into our Home Control System (HCS). The installation of the door and its location makes it impossible to run wiring of any sort back to any useful location. There is a solid lintel running over the top of the door and a gas pipe in the wall to the right. Access to the wall on the left is very limited by kitchen cabinets and worktop. In summary we need a solution that meet the following requirements:
The other option under investigation is the use of wired contact sensors. These are going to be a real pain to install but, will be invisible and more reliable. This would connect to our USB I/O interface.
We have now solved this problem and implemented a solution as part of our initial Z-Wave project.