Have you ever wondered how long your dog sleeps while you’re away at work? I have. As a hacker this seemed like the perfect excuse to strap a microcontroller to my dog, Gif, and see if I could find out. To make it a little more fun I thought I could have it text me when Gif wakes up to let me know how long he slept for. In this post I’ll show how to build your very own sleep tracker for your dog using Tessel and Twilio.