Meanwhile, an ESP 8266 is a couple of bucks and has fine I/O for most "smart" hair brushes and toilet seats. Once you get to fridge scale, a low cost tablet ta

Meanwhile, an ESP 8266 is a couple of bucks and has fine I/O for most "smart" hair brushes and toilet seats. Once you get to fridge scale, a low cost tablet tacked on the front gives me better UI, more security updates, and easier upgrades than anything an OEM would put in.