##Locate roaming office dogs with Sniffur
Picture this — you’re paw deep in code with your furry best friend contentedly snoozing by your side. You write a particularly legit regex and turn to pet your four-pawed companion only to realize the fluffy pillow bed next to your desk is empty! Your BFF is roaming the office _again_, and you have no idea where her current location is.
Ever happened to you? As a pet-friendly office, we’ve experienced this tragedy way too often. Since we all know necessity is the mother of invention we built an indoor pup triangulation system using an [Estimote beacon](http://estimote.com/) and three Bluetooth enabled [Raspberry Pi](https://www.adafruit.com/products/998) sniffers.
##Background on Beacons
Beacons are usually placed in stationary locations such as displays or areas of interest in retail stores. They emit a polling signal every second or so that any device with BLE (Bluetooth Low Energy) can pick up, your phone being one of them. That signal includes a few unique IDs and a value called an RSSI (Received Signal Strength Indicator) which basically tells how close you are to the beacon.
If you have an app that is configured to listen for a beacon with a certain ID it can make things happen behind the scenes. For instance, at a retailer, the app could determine if you’re standing in front of a pair of jeans and then tell a server on the internet this information. The server can then send out a push notification giving you a deal on jeans.
For Sniffur we flipped this scenario and put the normally stationary beacon on a moving dog. The signal strength then emits from the dog for our three antennas to pick up and process.
Hopefully this will inspire you to experiment with your own uses for beacons. If you're interested in the tech behind this idea, head over to my [blog](https://ideas.redpepper.land/has-anyone-seen-my-dog-c7da3e0e47b9#.4r2rrpsnr) to find code and more explanation. Also, no animals were harmed in the filming of this video. Also, yes, Bean is a greyhound and is the sweetest dog on earth.
See what [Raspberry Pi](https://www.raspberrypi.org/blog/triangulating-the-office-dog/), [Raspberry Pi Pod](http://www.recantha.co.uk/blog/?p=13793), and [Hackaday](http://hackaday.com/2015/11/29/office-dog-triangulation-keeps-spot-accounted-for/) said about our work!