30 Jan '14, 9pm

Fail of the Week: Reverse Engineering a Wireless Energy Monitor: [Afonso] picked up a cheap e... #TeamFollowBack

Fail of the Week: Reverse Engineering a Wireless Energy Monitor: [Afonso] picked up a cheap e... #TeamFollowBack

[Afonso] picked up a cheap energy use monitor a few years back. He really like the data it displays about his home’s electricity, using a sensor to gather this info and a display that communicates with it wirelessly. But there is no option to log or dump the data. He set out to reverse engineer the wireless protocol in order to extend the use of the system. As the name of this column implies, he failed to get this working. The hardware above is a 433Mhz transceiver that he rigged up as test hardware. It sounds like he’s assuming the monitor works on this band, which could have been his first misstep (we really don’t know). The speaker is there to give audible confirmation that he’s receiving something from the transmitter. This is where things start to get pretty weird. White noise was coming from the speaker, but when he stepped away from the bench it stopped. He was able...

Full article: http://hackaday.com/2014/01/30/fail-of-the-week-reverse-e...

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