Omega Verksted has it's own, custom made, automatic Coffee-machine. It's built around a standard Moccamaster coffemaker, To prepare the coffee it uses two small hoovers to pick up a coffee-filter, and a motorized grinder to grind beans from three different reservoirs.

In addition to make coffee the machine serves a web-page through it's Ethernet-interface, although it will never respond with http-error 418 - «I'm a teapot». The web-server is powered by an 8-bit Atmel ATmega128. Internally the different cards talks to each other via the can-bus protocol

The machine was built in 2009/2010 mainly by Espen Øybø and Eirik Steen-Hansen.

Controlling the coffee-machine:

The coffee machine is controlled over tcp/ip (also known as «da intawebz»). There is a command-line tool to control the machine, manly by setting it to the wished internal state.

The State machine:

This state machine is deprecated!

• 18: Grinds the coffee.
• 19:
• 20:
• 21:
• 22:
• 23:
• 24:
• 25: Moves the coffee-water-nozzle.
• 26: Boils the water?
• 27:
• 28:
• 29:

Code

Source code and circuit-board layout

The svn repositories for the Coffee-machine is as follows: TODO: add all circuit-board layouts to the repos.

• https://incomplete.ed.ntnu.no/coffee/Base
• https://incomplete.ed.ntnu.no/coffee/Current
• https://incomplete.ed.ntnu.no/coffee/Garbage
• https://incomplete.ed.ntnu.no/coffee/IR
• https://incomplete.ed.ntnu.no/coffee/Main
• https://incomplete.ed.ntnu.no/coffee/Motor1
• https://incomplete.ed.ntnu.no/coffee/Motor3
• https://incomplete.ed.ntnu.no/coffee/OnOff
• https://incomplete.ed.ntnu.no/coffee/PC
• https://incomplete.ed.ntnu.no/coffee/PC_Test
• https://incomplete.ed.ntnu.no/coffee/Vacuum
• https://incomplete.ed.ntnu.no/coffee/VoiceSynth
• https://incomplete.ed.ntnu.no/coffee/Watchdog
• https://incomplete.ed.ntnu.no/coffee/Water
• https://incomplete.ed.ntnu.no/coffee/Weight

Build and flash

The fuse settings for the standard coffee-machines mcus with bootloader enabled:

• Without crystal:
  • efuse: 0xff
  • hfuse: 0xd8
  • lfuse: 0x24
• With crystal:
  • efuse: 0xff
  • hfuse: 0xd8
  • lfuse: 0x3f

Documentation

For more documentation try to:

• Type 'help' in the command-line tool.
• Ask Espen or Eirik