If you’re going to develop another Arduino-compatible board these days, you might as well take a “kitchen sink” approach. The Smart Citizen Kit piles it on, including Wi-Fi, an SD… ...

It runs on an Arduino MEGA 2560 PRO (or similar microcontroller) and supports a wide array of additional hardware including pressure transducer, water level sensor, flow meter, OLED display, and more.

Roomba it ain't, but if you're either pressed for cash or have a tinkerer's itch, then you'd probably be more comfortable building your own robotic butler, er, vacuum cleaner.