Eric HayesKris Pennella
Published © Apache-2.0


Hack-a-thon, beer... means keg. iOT that thing! Wunderbar sensor madness, abused completely, Electric Imp adding LED and temp sensor.

IntermediateFull instructions provided1,900

Things used in this project

Hardware components

Technically we are using 2 imps. One as a temp sensor (left keg), and one for the tap active LED. That said, I've marked 3 down, as we fried one... before we put it in a zip loc.
Pebble Watch
Pebble Watch
The Pebble was a late addition. We had a team member come in late, wanting to help. As the endpoint was already there, It only took him an hour to get it all hooked up. Just in time for the end of day judging.
Relayr WunderBar
We used 3 sensors from the WunderBar pack. The temp sensor & movement sensor for the right keg, and the proximity sensor for the left keg. The Prox sensor worked much better, as our install team mate did a great job of tucking it behind the beer pull, not interfering with the action of pulling, and giving a rock solid pull/no pull state. The x/y/z sensor was a little jittery, and resulted in false positives... Aside from being on the pull, thus in the way.
Apple iPhone
We pushed the iPhone App (using to multiple team members, and to the dedicated, at tap, dashboard. The base of the App came up pretty quickly, so I'd say we had the dashboard up around noon... just in time for the lunch crowd, then many many updates through the day.

Software apps and online services

Amazon Web Services AWS EC2


Read more


Pebble App

ElectricImp LED

ElecticImp LED 2

Wunderbar Admin

Tap sensors

The sensors counting beer draws & the iOS app

Hack A Beer iOS App Page

Hack A Beer Thank You Page

Temp Sensor in the Keg



Server, iOS and Pebble Code


Eric Hayes

Eric Hayes

1 project • 2 followers
I am an indy iOS developer.
Kris Pennella

Kris Pennella

1 project • 1 follower


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