> For the complete documentation index, see [llms.txt](https://docs.velogicfit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.velogicfit.com/section-02-using-velogic-studio/gebiomized-integration.md).

# gebioMized saddle pressure mat integration

How to add a gebioMized BLE saddle pressure mat to Velogic Studio, what the mat card tells you, and which Bluetooth adapter your computer is using.

Velogic Studio connects directly to a gebioMized BLE saddle pressure mat over Bluetooth Low Energy, and streams its pressure data live into the fit.

The mat is its own plugin, configured in the **GEBIOMIZED** panel. Heart rate, power and cadence sensors are handled by the separate Bluetooth plugin: see [Bluetooth Overview](/section-02-using-velogic-studio/bluetooth-overview.md). Both share your computer's one Bluetooth radio, so the hardware advice in [Bluetooth USB adapters: choosing and positioning](/section-02-using-velogic-studio/bluetooth-adapter.md) applies to either.

## Hardware Compatibility

gebioMized has released several generations of transmitter hardware over the years. Only the latest BLE (Bluetooth Low Energy) transmitter is compatible with Velogic Studio.

### Transmitter Generations

| Generation        | Ports/Features             | Velogic Compatible | Notes                                                           |
| ----------------- | -------------------------- | :----------------: | --------------------------------------------------------------- |
| BT-box (Ethernet) | Ethernet ports             |          ❌         | Superseded by WiFi in 2016                                      |
| WiFi Transmitter  | Jack plug beside mat port  |          ❌         | May have black or original housing. Superseded by BLE from 2023 |
| BLE Transmitter   | USB-C port beside mat port |          ✅         | Current generation, required for Velogic integration            |

![gebioMized transmitter generations - only the current BLE transmitter (right) is compatible](https://11145950-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FjxwtZYYk0lvusnMTywNR%2Fuploads%2Fgit-blob-72bd0ef269168965a40b82abb68b9a3b35764644%2Fgebiomized-transmitter-generations.png?alt=media)

### Identifying Your Transmitter

To determine which transmitter you have, look at the ports on the device:

* **USB-C port** next to the mat port → BLE Transmitter (compatible)
* **Jack plug (3.5mm audio-style connector)** next to the mat port → WiFi Transmitter (not compatible)
* **Ethernet ports** → BT-box (not compatible)

If you have an older transmitter and wish to use the Velogic Studio integration, please contact gebioMized about upgrading to the BLE transmitter.

## LED Status Indicators

### Transmitter Status LED

| Blink Sequence                    | Meaning                                                                |
| --------------------------------- | ---------------------------------------------------------------------- |
| Green (solid, during charging)    | Charging in progress                                                   |
| Green (flashing, during charging) | Battery fully charged - cable can be removed                           |
| Red (solid or flashing)           | **Error - remove charging cable immediately and contact manufacturer** |
| Orange (flashing 1x every 10s)    | Deep sleep mode                                                        |
| Orange (flashing 1x every 3s)     | Sleep mode                                                             |
| Orange (flashing 2x)              | Device is paired                                                       |
| Orange (fast flashing)            | Data transmission in progress                                          |

### gebioMized USB dongle status LED

This table describes the small USB dongle **supplied by gebioMized with the mat**. It is not your computer's own Bluetooth adapter - for that, see [Which Bluetooth adapter is Velogic Studio using?](#which-bluetooth-adapter-is-velogic-studio-using) below.

| Blink Sequence            | Meaning                                |
| ------------------------- | -------------------------------------- |
| Green (solid)             | Device has power                       |
| Blue (slow blinking)      | Looking for connection                 |
| Blue and green (blinking) | Found transmitter, connecting to it    |
| Blue (fast blinking)      | Connection established, receiving data |

## Important Notes

### Battery Management

* Battery life is typically several weeks/months thanks to Bluetooth low-energy technology
* The device automatically switches to deep sleep mode when not in use to conserve power
* It is not necessary to switch off the device - it has extremely low power consumption in sleep mode
* **Do not switch off the device by removing the battery**
* Optimal battery capacity is between 40-80% - constant charging to 100% is not necessary
* This applies even if the device is not used for several weeks

### Battery Replacement

* Only use rechargeable batteries of type **16340 RC123A**
* Contact the manufacturer if you wish to replace the battery

## Configuration

Everything to do with the pressure mat lives in the **GEBIOMIZED** panel on **Step 1: Configuration**.

![The GEBIOMIZED panel on Step 1: Configuration in Velogic Studio, below the webcam, Bluetooth and BikeFinder panels](https://11145950-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FjxwtZYYk0lvusnMTywNR%2Fuploads%2Fgit-blob-3cf9d1f76b4ed6f4bfe8772ef168db45ea0a0fa2%2Fgebiomized-step-1-configuration.png?alt=media)

### Adding a mat

1. Switch the mat's transmitter on and put it within range of the computer.
2. Open Velogic Studio and go to **Step 1: Configuration**.
3. Scroll down to the **GEBIOMIZED** panel.
4. Click **ADD PRESSURE MAT** and pick your mat from the list.

![The GEBIOMIZED panel showing one configured mat card, the ADD PRESSURE MAT button, and the status line reading "2 pressure mat(s) available to add."](https://11145950-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FjxwtZYYk0lvusnMTywNR%2Fuploads%2Fgit-blob-2168abddcc0ec09be1e3bd672660351feb61eab8%2Fgebiomized-add-pressure-mat.png?alt=media)

**There is no "scan" button, and no scan to wait out.** The panel searches for mats continuously for as long as you are on Step 1, and the list updates itself as mats come and go. If a mat is awake and in range it will appear on its own; if it never appears, the problem is the mat or the radio rather than a scan that has finished.

The status line under the panel tells you what it can currently see:

| The panel says                              | What it means                                |
| ------------------------------------------- | -------------------------------------------- |
| No pressure mats detected; scanning.        | Nothing found yet, and nothing configured    |
| No other pressure mats detected; scanning.  | Everything it can see is already added       |
| *N* pressure mat(s) available to add.       | *N* mats found that you have not added yet   |
| Bluetooth is not available on this machine. | Velogic Studio has no usable Bluetooth radio |

**ADD PRESSURE MAT** only appears when there is something to add. Each entry in its list is the transmitter's serial number followed by its current signal strength, for example `FC4BD743FCDB (-72 dBm)`. A mat you have already added is never offered again, so you cannot add the same mat twice.

### The mat card

Every mat you add gets its own card in the panel.

![Two gebioMized mat cards: a deactivated card offering RENAME, ACTIVATE and REMOVE, and a connected card streaming a live saddle pressure map with its licence expiry underneath](https://11145950-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FjxwtZYYk0lvusnMTywNR%2Fuploads%2Fgit-blob-75ef2cb7e2c3a78b990da07a3eea17ff02dadd2d%2Fgebiomized-mat-cards-connected.png?alt=media)

The card header shows the mat's name - its serial number until you change it - and, when the card is collapsed, its connection state on the right.

| Control        | What it does                                                                                                           |
| -------------- | ---------------------------------------------------------------------------------------------------------------------- |
| **RENAME**     | Give the mat a friendlier name. Names must be unique, so two mats cannot share one.                                    |
| **DEACTIVATE** | Keep the mat configured but stop using it. The card collapses and the mat is no longer offered to the rest of the fit. |
| **ACTIVATE**   | Shown in place of DEACTIVATE on a deactivated card. Brings it back into use.                                           |
| **REMOVE**     | Delete the card. Velogic Studio asks *"Are you sure you want to remove this sensor?"* first.                           |

Removing a mat deletes its settings only - **your gebioMized licence is kept**. If you add the same mat again later it picks the existing licence straight back up, with no need to go back to gebioMized for a new one.

An expanded, active card also shows:

* **The connection state**, one of *Disconnected*, *Connecting*, *Checking license...*, *Downloading calibration...*, *Waiting to retry* or *Connected*. While it is checking the licence or downloading calibration a **Cancel** link appears beside it.
* **The licence line**, normally *License expires: (date)*. If Velogic Studio cannot reach gebioMized it says so instead - *Could not reach gebioMized — using your saved license*, *Cannot verify license — check internet connection*, *License invalid — contact <support@gebiomized.de>*, or *Can't verify saddle pressure mat license while offline — please sign in*.
* **Battery**, as a percentage, when the mat reports one.
* **Signal**, as *Excellent*, *Good*, *Fair* or *Poor*. Hover over it for the raw value in dBm. The row is hidden entirely when there is no current reading, so it never shows you a stale figure as though it were live.
* **Bluetooth adapter**, naming the radio your computer is using - see [the next section](#which-bluetooth-adapter-is-velogic-studio-using).

### A connected mat

Once the card reaches **Connected** it shows the mat's live pressure map, updating in real time. That is the confirmation that the mat is streaming: a saddle outline with the current pressure distribution painted onto it, as in the right-hand card above.

If the signal is poor or the map stalls, the fix is almost always where the computer's Bluetooth radio is, rather than anything in the software - see [Bluetooth USB adapters: choosing and positioning](/section-02-using-velogic-studio/bluetooth-adapter.md).

## Which Bluetooth adapter is Velogic Studio using?

> **This section is about your computer's own Bluetooth adapter** - the radio built into your PC or Mac, or a USB Bluetooth adapter plugged into it. It is **not** about the [gebioMized USB dongle](#gebiomized-usb-dongle-status-led) supplied with the mat, which is a different device entirely.

**Velogic Studio cannot choose which Bluetooth adapter it uses. The operating system chooses, and Velogic Studio reports the choice.** Neither Windows nor macOS gives an application a way to pick its Bluetooth radio. The **Bluetooth adapter** row on the mat card is therefore a mirror, not a setting: it tells you which radio the operating system has settled on.

### On Windows

Windows uses one Bluetooth radio at a time, and will usually select a plug-in USB adapter automatically. The **Bluetooth adapter** row on the mat card names the radio in use, so you can confirm which one it settled on.

If you need to force the choice - for example onto a USB adapter on an extension cable positioned close to the mat - disable the one you do not want:

1. Open **Device Manager**.
2. Expand **Bluetooth**.
3. Right-click the adapter you do **not** want and choose **Disable device**.
4. **Check the Bluetooth adapter row on the mat card** to confirm which radio is now in use.

Which adapter to buy, where to mount it, and what to run it on are all covered on [Bluetooth USB adapters: choosing and positioning](/section-02-using-velogic-studio/bluetooth-adapter.md).

#### What the Bluetooth adapter row can say

| The row says                              | What it means                                                      |
| ----------------------------------------- | ------------------------------------------------------------------ |
| *(adapter name)* (built in)               | Windows is using the radio built into the computer                 |
| *(adapter name)* (plug-in USB adapter)    | Windows is using a plug-in USB adapter                             |
| Built-in adapter / Plug-in USB adapter    | As above, but the operating system gave no name for it             |
| No Bluetooth adapter found                | The operating system reports no Bluetooth radio at all             |
| Bluetooth adapter could not be identified | The query failed. This is deliberately different from "no adapter" |

### On macOS

**macOS always uses the Bluetooth controller built into the Mac, and plug-in USB Bluetooth adapters are not supported.** Neither Velogic Studio nor macOS can change that, so there is nothing to switch. The row reads *macOS does not report which adapter it uses* rather than naming a controller.

To improve the signal on a Mac, move the Mac closer to the mat or clear what is between them. The placement advice in [Where to put the adapter](/section-02-using-velogic-studio/bluetooth-adapter.md#where-to-put-the-adapter) applies to a Mac's built-in radio just as much as it does to a USB adapter.


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