Plug your USB cable into the back of your PC, NOT a front panel port or USB hub.

For best results, use a high-quality USB-A to C data cable (USB 2.0 or higher).

To purchase a cable from Battle Beaver, click here.

Before continuing, open the setup page:

Press and hold the PS Button (or Guide Button, on MHX). While holding, plug the USB-C end of the cable into your controller.

This activates Setup Mode. When in Setup Mode, the LED should gradually change between red, white, and blue. If not, try again, and make sure to PS Button (or Guide Button on MHX) is held down while plugging the controller in.

If the LED flashes green instead, visit https://update.mariusheier.com and follow the instructions to update the firmware.

If you still can't get into Setup Mode, contact Customer Support.

Click the CONNECT CONTROLLER button (A). This will pop up a browser window. Select your controller from the list, then click Connect (B).

The main setup page will open (C).

Scroll all the way down to the bottom of the main setup page and click the BACKUP TO FILE button.

This should either automatically download or prompt you to download your settings backup file.

Confirm the backup file was saved to your computer, then unplug the controller and continue to the next section.

⚠️ We recommend backing up your settings before attempting firmware installation or updates.

Project Marius boards purchased after July 22nd, 2026 already have the most recent version of the XInput firmware available at the time of purchase, so following this section isn’t required if you just received your order.

Plug your USB cable into the back of your PC, NOT a front panel port or USB hub.

For best results, use a high-quality USB-A to C data cable (USB 2.0 or higher).

To purchase a cable from Battle Beaver, click here.

Before continuing, open the firmware update page:

Press and hold R3 (or RS, on MHX). While holding, plug the USB-C end of the cable into your controller.

This activates Update Mode. When in Update Mode, the LED should flash green. If not, try again, and make sure that R3 (or RS on MHX) is held down while plugging the controller in.

If you still can't get into Update Mode, contact Customer Support.

Click the CONNECT button (A). This will pop up a browser window. Select “Balls of ODIN - Paired” in the list, then click Connect once again (B).

The firmware update page should open.

As of this writing, here are the most recent XInput firmware versions for each Project Marius board variant:

• MH4: v1.02b Beta
• MH5: v1.02b Beta
• MHX: v1.01 Beta
  

The XInput firmware is still technically in Beta, but should move to a Stable release soon.

Last updated: July 28, 2026

Click the Beta tab (A). Find the most recent XInput firmware at the top of the list and click on it (B).

Click the INSTALL button below the list and wait for the firmware update to complete.

⚠️ Do not unplug the controller during the update process.

After the installation completes, a new screen will open. The controller should also automatically enter Setup Mode — in Setup Mode, the LED gradually changes between red, white, and blue.

If the controller is in Setup Mode, leave the controller plugged in and continue to the next section. If not, unplug the controller before proceeding.

Plug your USB cable into the back of your PC, NOT a front panel port or USB hub.

For best results, use a high-quality USB-A to C data cable (USB 2.0 or higher).

To purchase a cable from Battle Beaver, click here.

Before continuing, open the setup page:

Press and hold the PS Button (or Guide Button, on MHX). While holding, plug the USB-C end of the cable into your controller.

This activates Setup Mode. When in Setup Mode, the LED should gradually change between red, white, and blue. If not, try again, and make sure to PS Button (or Guide Button on MHX) is held down while plugging the controller in.

If the LED flashes green instead, visit https://update.mariusheier.com and follow the instructions to update the firmware.

If you still can't get into Setup Mode, contact Customer Support.

Click the CONNECT XINPUT (WEBUSB) button (A). This will pop up a browser window. Select your controller from the list, then click Connect (B).

Note: If the window says “No compatible devices found,” you may not have installed the XInput firmware correctly. Return to the previous carousel and try again.

Your next step varies: If the controller has a calibration saved, continue to the next slide. If the controller isn’t calibrated, go to Step 4C.

If the controller has an existing calibration saved, the main setup page will open.

If you want to recalibrate your thumbsticks or triggers without starting fresh, there are individual RECALIBRATE buttons in their respective sections. Clicking one will pull up the recalibration screen with on-screen instructions.

If you’d like to start over totally fresh, click the red CLEAR ALL DATA button, then click OK.

⚠️ The only way to undo pressing this button is to restore a settings backup.

After clicking OK, you’ll return to the starting screen. Click CONNECT XINPUT (WEBUSB) once more and proceed to the next slide.

If there’s no existing calibration, or if you recently updated the firmware, a screen saying NO CALIBRATION FOUND ON CONTROLLER will appear.

If you saved a settings backup file earlier, click the LOAD BACKUP FILE button to restore the backup now. It will load your previous setup. Scroll down to the bottom and hit SAVE TO CONTROLLER to complete the backup process.

To calibrate fresh, click CALIBRATE, then read the on-screen instructions before clicking I’M READY - START CALIBRATION.

Follow the on-screen instructions and fully rotate both thumbsticks around the thumbstick holes in both directions. The progress bars will gradually fill.

Failing to capture the full range will negatively affect the calibration.

Once complete, the next step will start automatically.

⚠️ CAUTION: Too much OR too little pressure here against the walls of the thumbstick holes can cause calibration issues.

Follow the on-screen instructions. Quickly and fully press the Left trigger, then release it naturally. Repeat until the instructions change.

Do not click the SKIP THIS STEP button on any Battle Beaver controller. Doing so will cause the triggers to malfunction. (You can fix it by repeating Setup, or by selecting ANALOG and clicking RECALIBRATE TRIGGERS on the main Settings page after setup.)

Note: MHX boards will not have trigger calibration steps or options until Marius adds them during Phase 2, estimated around September 2026.

On the next screen, slowly and gradually press the Left trigger, then release it naturally. Repeat until the instructions change once again.

Tip:
The counters won’t decrease until your timing is correct. This can be tricky with Smart Triggers, since there’s no difference between a fast or a slow press.

On the slow press screen with Smart Triggers, treat it as a long press instead. Experiment with press timings until the software accepts the input.

The screen will change once again. It’ll have you repeat the previous steps, but on the Right trigger this time.

After completing the trigger calibration, the main Calibration and Settings page will appear.

Clicking the ADVANCED button will open the fine-tuning options. These advanced options allow you to change the thumbstick resolution, fine-tune the center point, and manually change the range of your thumbstick input field.

12-bit is the current highest thumbstick resolution available.

There are two options available for this: RECENTER CALIBRATION and MANUAL RECENTER.

• RECENTER CALIBRATION: Move the sticks around a bit and release them. Clicking this button will reset the thumbstick mech’s current resting point to (0, 0).
• MANUAL RECENTER: Clicking this button will set the thumbstick’s current position — wherever that is — as (0, 0). This can be useful if the natural resting point of the thumbstick mech is inconsistent based on the direction you release the thumbstick from, but we recommend that most users avoid this button.

Clicking the CURVES button will allow you to modify your analog response curve, similar to the capabilities of a DualSense Edge controller or the settings available via Steam Input.

⚠️ CAUTION: Changing the analog curves here does not change any analog curve settings found in-game. The different response curves can stack and behave oddly.

Clicking the CIRCULARITY button will activate the new Circularity Tester. Slowly and fully rotate your thumbsticks until all 32 samples fill up. The resulting shape is the shape of your input field. Your Circularity Error Rate is the number listed below Sector RMS.

Making any adjustments while a Circularity test is active will show you a live preview of how those adjustments will affect your Circularity.

For a deeper explanation of how to use this tester, see the Circularity and Advanced Calibration page.

The Inner Deadzone and Outer Deadzone sliders allow you to modify the areas where a thumbstick won’t register any input.

Inner Deadzones are important for reducing bad behaviors like stick drift, and Outer Deadzones can reduce issues like sprint-canceling in games like Call of Duty.

Note: Changing deadzones here will not replace or override in-game deadzone settings. Deadzones set here can stack with in-game deadzones (or even behave a bit differently), so we recommend setting them in one place only to start with. Experiment with various settings to dial in your personal deadzone preferences.

On all Project Marius boards built by Battle Beaver, set the TRIGGER MODE to ANALOG.

If you purchased your board from a different company, or if you did a DIY installation into a controller with Smart Triggers, this instruction may not be accurate for you.

How to tell: If you or the company you purchased from wire their triggers to the Eagle Board, choose DIGITAL.

If you purchased a Project Marius controller from Battle Beaver, we wire Smart Triggers to our own separate chip. Choose ANALOG for proper functionality.

Note: MHX boards will not have trigger calibration steps or options until Marius adds them during Phase 2, estimated around September 2026.

Sometimes, the trigger calibration during initial setup can leave you with values that don’t act how you want in-game. Fine-tune the trigger behavior here.

Below the trigger meter, find the Raw value. This number represents the raw input value reported by the board.

When triggers are at rest (untouched), the Raw value MUST be higher than the REST value in the nearby input box.

• Problem: Triggers are stuck partially activated.
  Cause & Solution: Raw is lower than REST. Lower REST by 20-50 at a time until the issue resolves.
• Problem: Triggers feel delayed.
  Cause & Solution: Gap between Raw and REST is too large. Raise REST by 10-20 at a time until the issue resolves.
• Problem: Triggers are too sensitive.
  Cause & Solution: Gap between Raw and REST is too small. Lower REST by 10-20 at a time until the issue resolves.

Experiment with various values until the triggers feel right to you. A gap of 100-150 usually feels pretty good.

• Problem: Triggers can’t max out the meter.
  Cause & Solution: PRESS value is too low. Raise it by 20-50 and re-test, repeating until the issue resolves.
• Problem: Triggers max out way too early.
  Cause & Solution: PRESS value is too high. Lower it by 10-20 and re-test, repeating until the issue resolves.

Note: Triggers maxing out early isn’t necessarily a bad thing in most games, but it can have a minor impact on any games requiring partial, gradual, or precise trigger presses. Experiment until it feels right to you.

Set this to 100% to avoid any odd interactions. Currently, the setting doesn’t seem to work as expected.

This section allows you to modify the light bar’s LED color, brightness, and behavior. When we ship a controller with a Project Marius board, we leave most of the LED settings alone, except for the LED’s primary color:
#0099FF - Battle Beaver Blue.

We won’t be hurt if you replace it with your favorite color instead. (Much.)

Our Project Marius boards currently support up to six remappable rear buttons. Assign them here. Pressing a rear button on your controller will temporarily light it up in the software, allowing you to identify which button is which.

Most controller inputs are available for rear button assignment. Our most common configuration is Left - X, Right - O.

MH4 and MH5 only: The BUILT-IN TOUCHPAD option in XInput Mode allows you to rebind the Touchpad button to whatever input you prefer.

Drag the slider all the way to the right (8000Hz) to enable maximum controller performance without relying on external overclocking software.

⚠️⚠️ IMPORTANT ⚠️⚠️
Older CPUs, some motherboards, certain USB ports, or even specific games may malfunction at 8KHz. If you notice stuttering or reduced performance ingame, there’s a chance that the 8K polling rate is too much for your system to handle. In this case, we recommend dropping to 4K (or 2K if needed) and seeing if that resolves the issue.

Polling rate is only one factor. Even at 4K or 2K, you’re still gaining most of the speed benefits of the board.

After setting everything up how you want it, click the SAVE TO CONTROLLER button. The screen will change, and when successful, the new screen will say Configuration complete.

Unplug and replug the controller, then test it out to make sure everything functions as expected.

If so, congratulations! Enjoy gaming at the fastest speeds available.