CBPi4 HERMS PID KettleLogic

This Kettle Logic can be used to run a HERMS System with CraftbeerPi4.

Mash temperature is controlled via PID logic

• The Kettle logic is intended to be used in a HERMS system with HLT. It is a PID logic. PID parameters can be for instance derived from the PID AutoTune plugin (https://github.com/avollkopf/cbpi4-PIDAutoTune)
• It runs on PID control until it reaches a specified temperature. Above that temperature it heates w/o PID logic until a specified boil temp is reached.
• Power to run boil can be specified in the plugin
• Kettle Agitator (Pump) is siwtched on in Automode
• Pump can be switched of in intervalls

Parameters:

• Configurable:
  • P: Proportional - Takes current value into account
  • I: Integral - Takes past values into account
  • D: Derivative - Takes future values into account
  • Max Output: Maximum Power (%) to be used for PID during Ramp up
  • Max Boil Output: Maximum Power during when Boil Temp is reached
  • Max Boil Temp: When Temp is reached, power is set to Max Boil Output
  • Max PID Temp: PID is not used above this temp and max output is used
  • Rest Intervall: Intervall for pump activity in seconds
  • Rest Time: Pump Rest Time in seconds
  • SampleTime: 2 or 5 seconds. Determines PID recalcultation frequency
  • HLT Sensor: Sensor that measures your HLT temperature
  • DeltaTemp: Plugin allows control of HLT temp. This values determines the max delta temp that the HLT is allowed to be above the Target Mash Temp. Power will be set to 0 if delta temp is larger than max delta.

Installation:

• sudo pip3 install cbpi4-PIDHerms
• (or from the GIT repo) -> sudo pip3 install https://github.com/avollkopf/cbpi4-PIDHerms/archive/main.zip

Requirements:

• CBPi4 Version 4.0.0.45 or later (currently only available from my fork)

Changelog:

• 11.05.22: (0.0.4) Updated README (removed cbpi add)
• 10.05.22: (0.0.3) Removed cbpi dependency
• 21.11.21: (0.0.2) Plugin can now use actor power incl. PWM actors
• 23.09.21: (0.0.1) Initial commit