I am currently working on a home automation system and one of the challenges is big distances between my sensors and the the Raspberry Pi.

For instance, I would like to monitor two rooms with PIR sensors. Connecting via cable wouldn't be an option since we are talking about over 7 meters.


How can I wirelessly transmit sensor status (e.g.: PIR which is a simple high/low) to my Raspberry Pi?

  • 1
    I suggest you look at Arduino and wireless because if you can't use wire you'll need a remote processor and a remote wireless unit.
    – joan
    Apr 4, 2015 at 9:06
  • The same way everyone else does it -- sorcery! This seems a bit like "How do I ride a horse?" in that the answer is in the question, you wirelessly transmit it. No matter how you slice it, as joan points out additional equipment and/or very fast, tireless, probably tiny and winged porters are required. Note that wireless transmission requires power which is why it is often best done via a dedicated router.
    – goldilocks
    Apr 4, 2015 at 9:07

1 Answer 1


There are two ways you might do this. First of all, the simplest: Use two Raspberry Pis and connect them to a wireless network. Secondly, you could use Arduinos with RF wireless transmitters and a receiver on the Raspberry Pi. Take a look at the RasWIK (Wireless Inventors Kit - http://shop.ciseco.co.uk/raswik/) from Ciseco. It gives you an Arduino with built-in wireless capability and a GPIO plug-in board for the Pi allowing wireless communication between the two of them. Not sure how you'd do it for multiple sensors, but that's part of the fun.

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