I'm trying to find a pre-made I2C relay board similar to those 2, 8, 16 channel boards. Only caveat is I'd like to control it using I2C.
Does this thing already exist? Perhaps I'm using the wrong keywords here to find what I'm after. Maybe there's a more general purpose I2C I/O shield.
These two extension boards with relays can be controlled via I2C:
https://www.olimex.com/Products/Modules/IO/MOD-IO/open-source-hardware
https://www.olimex.com/Products/Modules/IO/MOD-IO2/open-source-hardware