I've gotten a used barista espresso machine from an friend.
One similar to this: https://i.ebayimg.com/00/s/ODQzWDc0OQ==/z/dWwAAOSwzE5cXUvq/$_86.JPG
Mechanicly it seems fine, booler, pump, solenoids etc. But the control units are broken, the keypads are completely worn down and dont work anymore. The replacement part (http://www.cafeparts.com/Push-button-Panel-5-Buttons-Gicar/Product/10849) costs upwards of 500.
I was wondering if I could replace this with a diy solution. I know my way around arduino programming, pcb design and I have acces to a 3d printer. Would it be possible to do this using arduino? An what do I have to keep in mind?
Most stuff in this diagram makes sense. But I'm nog entiarly sure what to do with the
*volumetric counter, not sure what it is exactly?
*boiler(I assume this is a read out for temperature and fill lever, but what do I use this readout for, just for checking if it's filled up to temp.? Before starting a shot)
*Order of operation for a shot? and what's important.
Does anyone know his or her ways around machines like this? And would like to help me figuring this out.
Posted this on reddit as well: https://www.reddit.com/r/arduino/comments/ap4au2/barrista_coffee_machine_control_unit/