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Coffee Roaster

Coffee Roaster

This project is the arduino code for the coffee roaster that I built. You can see the build log and details for the project at http://anthonydipilato.com/2016/08/11/coffee-roaster/

The arduino acts as slave to the raspberry pi.

Inputs

  • RaspberyPi commands via usb
  • 3 thermocouples (MAX31855)
  • 2 infrared flame sensors

Outputs

  • 5 relays
  • PWM pin for proportial gas valve.

Relays

  • Normally closed solenoid valve for gas line
  • Ignitor (relay to 110V SSR)
  • Cooling fan (relay to 110V SSR)
  • Exhaust Fan (relay to 110V SSR)
  • Drum Motor (relay to 110V SSR)
USE AT YOUR OWN RISK.
I am posting this project for EDUCATIONAL USE ONLY.
This project involves electricity, propane, and fire.
I will not be held liable damages and/or injuries resulting from the use of this code or from copying this project.

Required libraries

Commands

Code Item
0 Status
1 Relay on
2 Relay off
3 Set proportional valve

Addresses

Address Item
0 All
1 Drum Temperature
2 Chamber Temperature
3 Exhaust Temperature
4 Flame Status
5 Drum Relay
6 Cooling Relay
7 Exhaust Relay
8 Gas Relay
9 Ignitor
10 Proportional Valve

Author

Anthony DiPilato, Anthony@bumbol.com

License

All code is available under the MIT license. See LICENSE file for info.