AWS IoT Button
I hacked one of these to power the nightlight in my kid's bedroom (https://github.com/ecaron/hue-website-nightlights). The downside is that the button barely lasts for 1000 presses = 90 days (all kids like pushing buttons). And it is heart breaking because its just a AAA battery that they decided to solder in place...I'm excited that this button launched. But $20 is too much for something without a swappable battery. I'll either keep intercepting the ARP packets from the $5 unit or buy https://www.particle.io/button.