Using an I/O Expander IC

I've been working on a project which has been eating up all of my time and I thought I'd share part of it with you. In this video I'll show you how I connected an IO expander to a bluetooth module and use I2C to communicate with it. There's a lot of footage that didn't make the cut, mostly me banging my head on the desk trying to get I2C to work. There was some pretty delicate work soldering magnet wire to the IO expander chip, but unfortunately I don't have a good microscope solution and that footage didn't make it either. We'll have to fix that.