# Device Dashboard via RNDIS on an RP2040

Your headless Raspberry Pi Pico-based hardware can also have a device dashboard on a web browser when you connect it to your computer via USB

## Build and run

Clone Mongoose repo, go to this example, and build it:

```sh
git clone https://github.com/cesanta/mongoose
cd mongoose/examples/rp2040/pico-rndis-dashboard
make build
```

This will generate a firmware file: `build/firmware.uf2`. Reboot your Pico board in bootloader mode, and copy it to the RPI disk.

The device will reboot, register as a USB RNDIS device, and add a network and a removable read-only disk to your computer.
Open the new drive, named `Mongoose`, and double click on its `INDEX.HTM` file; your browser should open and you should see a device dashboard.

Alternatively, you may just run a browser, and open 192.168.3.1, 

Note: USB stdio in the Pico-SDK is done in background with TinyUSB and an interrupt to hide it from the user and periodically call tusb_task(). When we use TinyUSB, that code is removed from the compilation list; so this example uses UART stdio (UART 0) to keep things simple and focused on the RNDIS example. If you want to see the console output, connect an USB-to-UART or a low-voltage-TTL-to-RS-232 adapter to GPIO0

Note for Mac users: For this example to run on Mac, please set `DUAL_CONFIG=1` in `CMakeLists.txt` before building; this enables CDC-ECM. Please notice that Windows may not recognize the mass-storage device in that case.