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Monitoring electrical power ?

Bernard TourancheauBernard Tourancheau
edited November 2012 in At home Vote Up1Vote Down
Power / current monitoring in order to deduce energy consumption is of big interest.
Does anybody already designed such a prototype for twine motes ?
Thanks

Answers

  • 5 Comments sorted by Votes Date Added
  • Sebastian KaempfeSebastian Kaempfe
    Vote Up0Vote Down
    vote up. should be no problem to include the current current as a "then" parameter...
  • Andrew SchmittAndrew Schmitt
    Vote Up0Vote Down
    I'd just like to detect the presence of external power and if it goes away. Allows me to remotely monitor loss of power.
  • Bill SpencerBill Spencer
    Vote Up0Vote Down
    This should work as long as you are not using an external sensor for anything else, and your wi-fi router is backed up with a UPS or other independent power supply:

    Assume your twine has fresh batteries and is running on USB power which comes from an AC adapter. Connect a simple light sensor to either the breakout board or the moisture sensor, and plug a small light bulb into the same AC outlet as the USB adapter, shining on the light sensor. When the AC fails, the twine will switch to battery power and the light will go off, causing the light sensor to read open (high resistance). This will show either "open" or "dry" to the rule you code, depending on which device you used.
  • Graham CruickshankGraham Cruickshank
    Vote Up0Vote Down
    I asked about a rule for "If Twine has not report in x minutes..." for the purpose of knowing if power or internet is out at my vacation hut. they said they would put that on the list. Should be easy, since the rules are server-side.
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