Actually the most loved consumer espresso machines (the gaggia mentioned in the article and the rancilio Silvia) are analog and don't have Firmware. That said t

Actually the most loved consumer espresso machines (the gaggia mentioned in the article and the rancilio Silvia) are analog and don't have Firmware. That said there are a number of projects (as also mentioned in the article) to add PID controllers, pressure controllers etc via some microboards.