If you have an electric heater (HLT, BK, RIMS, HERMS) then you may not need PID control. A simple on/off control can work, or also with a duty cycle (on for % of time, off for the other). For more fine control, or certainly for propane gas burners, you will need something better. PID control will let you hold very precise temperatures during brew day. https://flows.nodered.org/node/node-red-contrib-pid https://flows.nodered.org/node/node-red-contrib-pid-autotune
(Draft discussion) These are the most basic steps to get NodeRed running on the RaspberryPi, and talking with the BreweryHMI. https://nodered.org/docs/getting-started/raspberrypi 1. Run NodeRed on the RPi 2. Enable auto-start (optional, but recommended) sudo systemctl enable nodered.service 3. Connect to NodeRed either local on the RPi, or from another computer http://localhost:1880
Request: RIMS support
Request: Add RIMS support
RIMS
Request: HERMS support
BIAB - Screens and functions for brew-in-a-bag
Request: PID interface and tuning