tmclane / fermware

Multi-Zone Fermentation Chamber Firmware powered by Arduino

README for Fermware

#+Last Update: 2014-8-13

Fermware

This project is intended to be a functional multi-zone fermentation chamber control firmware. It was designed to manage a configurable number of zones with a choice of two different control algorithms. Currently only the hysteresis algorithm is implemented.

At this time it is only capable of either heating or cooling at a given time. The reason for this is that I have no ‘heating’ capability in my physical chamber at this time. It will be added when it is needed.

Control Algorithms

Each zone is configurable to be managed by one of the following types:

• Hysteresis

  The hysteresis algorithm is used to keep the temperature of the sensor it is monitoring within the range specified.

  The configuration is:

  • set point desired temperature for the zone.
  • overshoot amount in degress of acceptable overshoot above the set point before cooling is applied
  • undershoot amount in degress of acceptable undershooting of the set point

  It’s operation is as follows:

  • If the temperature is above the set point but below the overshoot increment and the system is idle nothing happens.
  • If the temperature is above the set point and the overshoot increment then the system enters the cooling state.
  • If the temperature is below the set point and above the undershoot decrement then the system continues cooling.

• PID

  Not currently implemented.