Sensing a Ikea Trådfri Outlet

Projects General Guidance
1

I have a ceiling mount projector, a google home and a hooked up ikea trådfri outlet.

  • I can power the ikea trådfri outlet or projectors mains power with a google command :smiley:
  • When the projectors mains power is switched on, it starts in standby :cry:
  • The remote can be used to turn on the projector without touching the projector (so it doesnt misalign) :smiley:
  • I have captured the IR code and can successfully turn the projector on and off with an arduino and an IR LED :smiley:

So i need a way to 'detect' when the ikea trådfri outlet is on, so I can tell the arudino to take the projector out of standby, and also a way to 'detect' when its off to put the projector back into standby.

possible options:

  • shove a light sensor on the ikea trådfri outlet, theres a LED when its on - that could detect it - bit sketchy
  • some fancy current sensing equipment - overkill?
  • plug a transformer into the ikea trådfri outlet, plug straight into arudino detector pin - different grounds = bang
  • interface with the ikea zigbee - make the arudino a ikea switching target

Any other simple way im missing? any guidance would be super useful - thanks!

2

Hmm just through - plug in a low voltage transformer to the ikea trådfri outlet, and hookup a small relay to switch the arudino.

3

Hello, or Hej!
I'm living in the IKEA country, Sweden...…

Is there any communication where the projector sends any message back to an Arduino command? That could be a way to test the precense of the projector. Send a command a check for an answer.

4

Or, use a mains switch that Powers up both the IKEA stuff and the Arduino......

5

If the projector has a standby mode (as all do), why do you want an additional device to turn it off? :roll_eyes:

6

memolipd:
Hmm just through - plug in a low voltage transformer to the ikea trådfri outlet, and hookup a small relay to switch the arudino.

Why use a relay at all? Just power that arduino from the same outlet aka let it turn on at the same time. And simply put the IR command in setup().

Paul__B:
If the projector has a standby mode (as all do), why do you want an additional device to turn it off? :roll_eyes:

Also true, but linking a Trådfri to Google Home is easier then linking an Arduino to it.