Halloween is a great holiday to light things up and have a little fun. I woke up a few days ago with an idea in my head for a cool Halloween hack using one of my favorite LED-toting device, the Twilio Hackpack. I've written about the Hackpack before in terms of the basic building blocks but haven't shown much of the cool things you can do with it.
What I built for Halloween is a couple of animated images that can be set on the hackpack using SMS. One of them is a ghost and the other is a bat. They both have blinking yellow eyes. They look like this on the hackpack:
You can change the image on my hackpack at any time by sending the word
The code to make the bat and ghost is written using the Adafruit NeoPixel libraries. You can find the completed code in this Github repo.
The backend for handling text messages is written using the Laravel PHP framework. You can find the completed code for the backend in this Github repo.
I hope you have a very spooky Halloween. If you create any cool hacks for Halloween be sure to let me know on Twitter @brentschooley.