I haven't posted here lately because a couple of years ago I decided to go walkabout for a bit and all my projects and instruments have been in storage. Being in one place again, I am renewing my interest in measurement and control and am currently most interested in energy usage in the abode and supplementing some of the grid power with solar.
After having used the wired Kill-A-Watt power monitor for a while and being impressed with its accuracy I decided to try out the Wireless version. In my experience it is just as accurate as the wired version and is packaged nicely. The only problem for me is the manufacturers, P3 International, haven't chosen to provide a computer interface to the data available in the readout.
I haven't unpacked an oscilloscope and logic analyzer yet so everything I know about the wireless Kill-A-Watt display is just from looking around inside one and guessing from experience. The radio is a 915 MHz ISM band unit but unfortunately is a bonded chip variety that makes figuring out what the signals going in and out are, difficult. There is also a SOC that is a surface mount part and I'm hoping that the demodulated signal from the radio can be intercepted on the way to that. If so, it will be relatively simple to grab the sensor data off that and send it to the Arduino for further processing/communication.
So, that's my project. Any thoughts on feasability etc. are welcome.