Hi,
I envision that this project is not just a coffee-maker or the barista machine.
You've mentioned about stepper/servo motors, temperature sensors, etc... which means you might be something into a self-service coffee machine with intelligence placed on it as the mcu can do better than do 1 linear process.
Let's discuss more on the design because I'm an R&D person, with indepth electronics, mechanical, programming capability.
Me and my wing-man (my son) is only bidding for prototype projects here in Freelancer, involving mcu board + mobile integration. We're restricting our projects in smart objects, tracking device and IoT.
We can build the basic of this coffee maker, and expand the capability as we move along.
Sincerely,
ARNOLD L. VILLASANTA, ECE - Solutions provider for more than 15 years.
ANGELO VILLASANTA, CoE, Senior developer for mobile and web-based applications.