While most of the things that I can do with my home automation setup are only of interest to myself on occasion I manage to add something that my wife also thinks is useful. This is one of them.
A while back I decided to add the ability for the home automation system to know when the washer has finished washing clothes and to make an announcement. This worked well though the module itself appears to have been damaged and is no longer communicating. Before that module failed I managed to find a way to sense when the dryer has finished. This was accomplished using an Aeon Labs Energy Reader.
The unit is a Z-Wave device with two clamps, which is typically intended to be used at a breaker box. It wouldn’t have been able to properly sense current flow if I had just placed the clamps around the power cable for the dryer; the clamps need to be over individual wires that are normally within the cable sheath. However, on my dryer the three wires are individually accessible for a few inches before they enter the main sheath and are then covered.
It was just a matter of placing the clamps around two of these cables. Fortunately, as with the washer, our dryer is low-tech and doesn’t draw any power while not in use so setting up the sensing thresholds in Indigo was relatively easy (actually easier than setting up the washer). Though the washer module is not currently working the dryer notifications still continue to work.