For most features that seem to be ok, but we are thinking about having somekind of display for a bit more details. A cheap 16x1/16x2 display would work quite nicely I think.
Today inspiration hit me to look into that a bit more. I had a 16x1 LCD laying around and a PCF8574T i2c I/O-expander backpack. Wired it up to the Raspberry Pi and started to look for some (proper aka C++) code. No luck there. Just some silly python this and python that. meh.
Well, it works fine on the Arduino.. and that is C++.. hmm, let's port it to plain Linux i2c interface (well, ok, wiringPi i2c wrappers). And so I did.
Here you go:
|Raspberry Pi controlling LCD display with i2c in C++|
I will do a bit cleanup and then code will be up on github.
You can get LCDs and i2c backpacks from Amazon: