Project in progress
RIMS Arduino Library

RIMS Arduino Library © GPL3+

Re-circulation infusion mash system library for Arduino.

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Components and supplies

A000066 iso both
Arduino UNO & Genuino UNO
×1
DFRobot LCD Keypad Shield For Arduino
×1
Hall effect flow sensor
×1
Temperature probe : any PT-100 RTD
×1
Adafruit Windbond W25Q80BV - 1 MByte SPI Flash
×1
Any 5V DC power supply
×1
Any old PC speaker (or buzzer)
×1

Apps and online services

About this project

rims-arduino-library demo

This library implement RIMS controls for home brewers. For definition of a RIMS, see What is a RIMS?

For me, an Arduino micro controller + a LCD Keypad shield was cheaper and a lot more customizable than a commercial PID controller. So, with this library, a commercial PID controller is unnecessary. Automatic PID tuning toolkit is also included. Temperature can be read with a thermistor, a resistance temperature detector (RTD) or any custom temperature probe. Heater is controlled with pulse-width modulation (PWM) of a solid-state relay (SSR).

rims-arduino-library Web Site

GNU General Public License version 3.0 (GPLv3)

  • User interface made with DFRobot LCD Keypad Shield for Arduino or similar (can be customized)
  • Heater action : solid-state relay (SSR) time proportioning control (or pulse width modulation, PWM), LED duty-cycle indicator
  • Temperature sensor : RTD reading with an instrument amplifier and cubic fitting, thermistor reading with voltage divider, custom temperature probe support, measurement pre-filtering before PID
  • PID temperature regulation enhanced : derivative filter, smart integration clamping anti-windup, multiple controller (up to 4, optional) for different mash water quantities
  • Automatic PID tuning : Autotuner based on relay identification, Fourier analysis and Ziegler-Nichols methods
  • Manual PID tuning : Process model identification tools
  • Tripped breaker detection on heater : any 5V DC power-supply
  • Countdown timer that is activated only when temperature setpoint is reached
  • Data logger : simple serial communication (usb port), SPI flash memory (Winbond 1 Mbytes), USB Menu to access brew data on SPI flash memory (by holding <OK> at startup)
  • Hall effect flow sensor : turn off heater if flow is critically low,
  • Alarm with external speaker : bad flow\disconnected temperature probe errors, timer is elapsed, no voltage on heater, different frequencies for each alarms (alarm distinction)

https://sourceforge.net/projects/rims-arduino-library/

Code

Link to SourceForge repoC/C++
https://sourceforge.net/projects/rims-arduino-library/

Comments

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