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Coffee-Tech FZ-94 (via USB) Roasting Intelligence Setup

This manual covers the connection of Coffee-Tech FZ-94 to Cropster's Roasting Intelligence.

Written by Nikolett Takacs

Updated at February 2nd, 2026

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Table of Contents

Specifications Requirements Supported measurements Roasting Intelligence Setup Installing the Roasting Intelligence software Establishing a connection to the machine Troubleshooting


Specifications

Requirements

  • USB cable
  • Driver for the USB serial converter

 

The driver may already be pre-installed with your operating system.

 


Supported measurements

  • Bean temperature
  • Exhaust temperature
  • Drum temperature
  • Airflow [%]
  • Drum speed [MHz]


Roasting Intelligence Setup

Installing the Roasting Intelligence software

  1. Download Roasting Intelligence.
  2. Complete the installation process by following the steps provided.
  3. Double-click the Cropster icon on your desktop to access Roasting Intelligence.
  4. Click the green Login with the browser button.
  5. You will be directed to the C-sar browser.
  6. Enter your Username* and Password* and click the green Sign in with password button. 
    Use the same credentials that you use to access the online platform C-sar.
 

Establishing a connection to the machine

 

The images below are for reference and may vary slightly from your screen.

 

 

Important details to keep in mind:

  • Before you start configuring your roast machine, ensure that you have added it via the online platform C-sar.
  • Only click Save after you've completed all settings in Roasting Intelligence.
 

 

  1. SelectPreferences > Machine > Configuration
  2. To choose the Roast machine, click on the dropdown menu in the Machine section.
  3. Click the + Add connector option to choose your connector from the dropdown list.
  4. Select Coffee-Tech PIDs (FZ-94) from the dropdown. 
  5. Click Select to add the connector.
  6. Click on the Gear icon in the Connector setup section to open and configure more settings.
  7. Select the Serial port that refers to the connection:
    • Serial port: tty.usbserial-x (maOsc) or COMx (Windows)
  8. Click OK.
  9. Navigate to the Machine > Measurements tab. All supported measurements will be displayed.
  10. To activate the measurements, click the green toggle button.
  11. Enable the desired measurements and choose Coffee-Tech PIDs (FZ-94) as the connector type.
  12. (Optional) Change the order of the measurements by using theDrag and Drop icon and move it into position
  13. Click Save to finalize the changes.
  14. Restart Roasting Intelligence. If the setup was successful, you will see the temperature values displayed on the right-hand side of the screen following the restart.

 

Learn more about the Roasting Intelligence Preferences. 

 

 

Troubleshooting

The machine is successfully connected, but Roasting Intelligence indicates 0 for the Drum speed and Airflow:

  • Make sure the drum is turned on.

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

  • Is the roast machine connected to the computer? 
  • Have you downloaded the driver for the USB serial converter?
  • Is the correct serial port within Roasting Intelligence selected?

⚠️  If Roasting Intelligence shows "Sources connected" but no temperatures appear, you likely selected the wrong serial port. Check your settings and select the port corresponding to your roast machine.

 


 Driver for the USB serial converter

If you cannot select the correct serial port within the Serial port field, your computer may not have the appropriate driver needed to recognize the serial converter's physical connection.

Please reach out to support.cropster.com, and attach the following information relevant to the USB serial converter used:

  1. Brand and model
  2. Serial number
  3. Picture of the serial converter
  4. Roasting Intelligence log files 

If you have further questions, feedback, or concerns, please submit a support ticket directly from support.cropster.com. 

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