Disclaimer: the initial code is not mine, but I don't know the ownership of everything

Pop Roaster

Controlling a popcorn popper using Arduino to roast great coffee.

To get more information about the project and details how to build the roaster, read my personal blog on Medium (it's in PT-BR): https://medium.com/@relatos.cafe

Release History

Version 0.4.0

• Lowering heater and thermocouple cycle time.
• Bringing back limited power mode. Used with a good PID configuration brings an excellent result. Turned OFF by default.

Version 0.3.0

• Remove beta feature: heater limits by temperature. I figured out that it's better to control heater using only PID with decent configuration.

Version 0.2.1

• Hardware protection by software:
  • Limiting maximum temperature at 220ºC.
  • Turn off heater if fan is set to zero.

Version 0.2.0

• New beta feature: heater limits by temperature for better automation (disabled by default).
• Using PID controlled mode now with better response using different PID configuration and better thermocouple (faster response).
• Major refactor and code sanitization.

Version 0.1.0

First usable version.

• Allows control of fan and heat power by Roastlogger.
• Using PID controlled mode might still have some issues.
• Heater control system still causes visible RoR instability.