Mill City Roasters - Roasting Intelligence (RI) Setup

This manual covers the connection of any Mill City roast machine to Cropster's Roasting Intelligence.



Supported measurements

  • Bean temperature
  • Exhaust temperature
  • Inlet temperature
  • Gas (kPA)
  • Airflow (Hz)
  • Drum speed (Hz)
  • Environmental temperature (Version 3 only)

Roasting Intelligence (RI) Setup

Installing the Roasting Intelligence (RI) software

  1. Download the Roasting Intelligence from
  2. The Cropster installer leads you through all the installation steps.
    IMPORTANT: Download the Phidget Driver by checking the box next to Phidget Driver and clicking Next.

    Mac only: Allow the Phidget driver within the Mac's Security & Privacy settings.
  3. Open the RI by double-clicking the Cropster icon on the desktop.
  4. Enter your username and password.
    The user name is the email address your Cropster invitation has been sent to and use the password you've generated when accepting the invitation.
  5. Check the Remember credentials box if you want to be able to run the RI offline.
  6. Click the Login button.

Establishing a connection to the machine

  1. Go to Account > Preferences > Machine tab.
  2. Select the Roasting machine you would like to connect from the drop down menu (e.g. Mill City)
  3. Select Mill City (all versions - Phidgets and PIDs/PLC) from the drop-down for all measurements.
  4. Click on the gear () icon to open the PID settings.
  5. Identify your Mill City Version  and select the Serial port that refers to the connection to the machine.
    • Version 1:
      Mill City Version: Phidget only 
      Serial port: None
    • Version 2a:
      Mill City Version: Phidgets/Shihlin controls (USB port on the back)
      Serial port: /dev/tty.usbserial-x (Mac) or COMx (Windows)
    • Version 2b:
      Mill City Version: Phidgets/Delta controls (USB port on the back)
      Serial port: /dev/tty.usbserial-x (Mac) or COMx (Windows)
    • Version 3:
      Mill City Version: Phidgets/Delta controls (data port on control panel and Phidget)
      Serial port: /dev/tty.usbserial-x (Mac) or COMx (Windows)
    • Version 4:
      Mill City Version: MCR Series (data port on control panel)
      Serial port: /dev/tty.usbserial-x (Mac) or COMx (Windows)
  6. Click Save to confirm the changes. The RI requires a restart to apply the settings.

If the setup was successful, you will be able to see temperature values on the right-hand side of the RI screen after the restart.

Customize your RI user preferences


If the RI indicates No source connected and/or you cannot see any measurements, please check the following: 

  • Did you choose the correct version?
  • Did you choose the correct serial port?

For further assistance, please create a support ticket by clicking the Support button in the left lower corner of the app. A Cropster support rep will get in touch with you.

Congratulations! You have successfully set up the Cropster Roasting Intelligence!

Check out our Getting started video and enjoy tracking your first roasts! 

More manuals and videos can be found on