> For the complete documentation index, see [llms.txt](https://docs.smart-stuff.nl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.smart-stuff.nl/p1-modbus-dongle/firmware-v2-current/device-manager.md).

# Device Manager

The Device Manager is the local configuration and control interface for firmware v2. It communicates directly with the adapter through USB-C. Configuration data remains local between the browser and the connected device; firmware v2 has no built-in network web interface.

[Open the Device Manager](https://config.smart-stuff.nl/)

<figure><img src="/files/4CgN7Y4UhCCQ0x17KrjT" alt="Firmware v2 Device Manager with a firmware update available and the Modbus monitor visible"><figcaption><p>Firmware v2 Device Manager showing device status, the Modbus monitor and an available firmware update.</p></figcaption></figure>

{% hint style="warning" %}
Use a Chromium-based browser such as Google Chrome or Microsoft Edge and connect the adapter with a USB data cable.
{% endhint %}

## Connect

1. Connect the adapter to the computer through USB-C.
2. Open the Device Manager.
3. Select **Connect**.
4. Choose the adapter from the browser dialog.

The overview shows the hardware type, installed firmware version, connection state and live smart-meter status.

## Device control

The Device Manager is used to:

* View device, firmware and hardware information
* Configure the active Modbus mapping and serial communication
* Select the smart meter source on compatible hardware
* Monitor recent Modbus requests
* Reboot the adapter
* Check for and install firmware updates
* Copy diagnostic system information for support

## Configuration

Depending on the connected hardware, the following settings are available. See [Configuration](/p1-modbus-dongle/firmware-v2-current/configuration.md) for the applicability matrix and detailed guidance.

* Smart-meter source: DSMR/P1 or HAN-NVE
* Modbus mapping
* Modbus device ID
* Baud rate
* Serial format
* RS485 termination
* Modbus monitor
* RGB LED brightness, on hardware variants with an RGB status LED

Changed rows are marked in the interface. Select **Save** to store the changed values on the adapter.

The mapping, device ID, baud rate and serial format are independent settings. Selecting another mapping changes the exposed register model only; it does not automatically change the communication settings.

## LED indicators

The Device Manager can change the RGB LED brightness on supported hardware. See [Configuration](/p1-modbus-dongle/firmware-v2-current/configuration.md#status-led-brightness) for applicability and [LED indicators](/p1-modbus-dongle/firmware-v2-current/led-indicators.md) for status meanings.

## Modbus monitor

The monitor displays the 30 most recent Modbus RTU requests received by the adapter, including device ID, function code, address, word count and result. It can be enabled in Configuration and is intended for commissioning and troubleshooting, not permanent logging.

## Firmware update

When a newer stable firmware version is available, the Device Manager displays an update notification. The existing USB connection is handed to the firmware updater, so the adapter does not need to be selected a second time.

The update does not erase the stored user configuration. After a successful update, the Device Manager reconnects automatically.