Dyno2 Dynamometer Software – general information


The software is supplied with DC1 controller that covers the hardware requirements. The user should not run additional applications in the background when the software is running to avoid performance problems.
To use the software, a display with resolution at least 1024×720 is required. Recommended resolution is Full HD (1920×1080). Keyboard and pointing device (mouse) is required. Mouse with scroll wheel is recommended.


  • Fully adjustable software compatible with all dyno types – engine, chassis, hub, inertial, absorption and others.
  • Detailed project database with advanced sorting, filtering and run statistics.
  • Easy to read run analysis tool. Fully configurable colors, units and presentation.
  • Smoothing customizable per data channel.
  • CSV export of processed data.
  • Dynamometer reports fully customizable with easy to use HTML-like file.
  • Lots of wizard tools to shorten dyno setup. Tools for load cell calibration, dyno inertia calculation, brake PID tuning and more.
  • Flexible sensor characteristic tables to convert analog signals to physical units.
  • Live dyno parameters plotting during measurement.
  • Configurable alarms and warnings.
  • Continuous data logging up to 49 days.
  • Scatter plotting. For ex. Power as a function of Ignition Angle.
  • Flexible absorber control modes: manual power %, speed lock, acceleration limit, programmable brake and throttle sequences.
  • Filtering and smoothing settings available to the user.
  • Unlimited comparison of measurements.
  • Run data saved in industry standard HDF format for ease of analysis in external software (e.g. MATLAB)
  • Programmable logic module for outputs control.
  • USB and Bluetooth support for OBD interface readers.
  • Automatic throttle control with CAN-Bus and Ecumaster control units.
  • Programmable CAN-Bus parsing to user data.

Future functions:

  • Programmable CAN-Bus data export.

Operating system

The software runs on Raspbian OS installed on the DC1 controller / computer.
The display must be connected to the controller before powering it up.
DC1 is supplied with installed and configured system and Dyno2 software placed on desktop, ready to run.
Dyno2 software works only on custom, prepared, system. It won’t run on a clean Raspbian installation.
Doing system updates is not recommended, as it could break correct Dyno2 software operation.
Power must not be cut off when the software is running or during any data write operation. It could lead to data corruption. Our experiments prove that powering down the device, with the operating system running idle, doesn’t have any negative consequences. Despite that, it is suggested to shut down the operating system before powering down the device.
If the operating system gets damaged, the whole system image can be downloaded from our website: https://api.perek.it/dyno2/updates/
The controller is shipped with root and pi user password : dynoadmin
If the controller will be working on a public network, it’s advised to change the default passwords.
When DC1 device is shipped, default LAN configuration is static IP address: To connect the device to LAN network, it is usually required to set IP settings to automatic DHCP.
All application data – settings and measurements are stored in /home/pi/.dyno2 directory.

  • log – directory with error logs
  • reportdynamometer report configuration files
  • runs – directory with measurement data. The .hdf data file contains all information needed to open it on another device.
  • saved – default directory for data export (e.g. PDF, CSV).
  • media – stores project pictures and camera recordings
  • analyzeVariables.xml – data channels configuration for ANALYZE tab.
  • canInputs.xml – CAN bus parsing configuration.
  • functions.xml – user programmed logic functions.
  • projects.db – old database file from software < 1.0.0
  • projects2.db – current more detailed database with information about projects and associated runs.
  • projectsCustomization.xml – customization settings for projects database
  • runsCustomization.xml – customization settings for runs database
  • runVariables.xml – data channels configuration for RUN tab.
  • settings.ini – file with software and dyno configuration.

Customization for dyno manufacturer

Dyno manufacturer can place additional files in main (/home/pi/.dyno2) dyno directory to personalize the software for their product:

  • branding.png – default plot background.
  • about.txt – default text displayed in SETTINGS / About tab.
  • style.css – software look customization with use of CSS styles.

Here you can find CSS styling documentation:
Qt Style Sheets Examples
Qt Style Sheets Reference

Keep in mind that some advanced customized styling may negatively affect user interface refresh rate and responsiveness.

Storing dyno data on removable media

Adding new system user to have two dyno setups

You may want to have two completely or partially separate setups to use one controller for two dynamometers. One way to achieve it is to create a new user in the operating system. This task need to be completed through the terminal.
First add a new user. For this example, we will use “bob” username:

sudo adduser bob

After this command, enter all the information and new user password according to the prompts. Then add the user to all groups in which the main user pi is.

sudo adduser bob adm
sudo adduser bob dialout
sudo adduser bob cdrom
sudo adduser bob sudo
sudo adduser bob audio
sudo adduser bob video
sudo adduser bob plugdev
sudo adduser bob games
sudo adduser bob users
sudo adduser bob input
sudo adduser bob render
sudo adduser bob netdev
sudo adduser bob spi
sudo adduser bob i2c
sudo adduser bob gpio
sudo adduser bob lpadmin
sudo adduser bob usb

Next, edit /etc/sudoers file to set up the system, so the new use won’t need to enter the password every time to get administrative rights. You can use “sudo nano /etc/sudoers” for this task. Add the following new line at the end and save the file:


Now you can switch the user by logging out from default “pi” user and logging to your new “bob” user.
Optionally, you can change the system setting to show the login screen at every boot. Run:

sudo raspi-config

The option you want to change is located in: 1 System Options > S5 Boot / Auto Login > B3 Desktop

Now reboot the system, place the Dyno2 app on the desktop and use the new user with separate dyno setup.