# Activating OTG Mode

By default, URVEPi operates all four USB ports in host mode. To switch the top-middle port to OTG mode and connect your PC to it using a USB-A cable, you need to do it manually. This means that you won't be able to transfer files from your USB-C connected PC, as this port only works as a power source and acts as an RS232 emulator.

To change this behavior and force the device into OTG mode, you need to enter the following command as a superuser:

```sh
su
echo peripheral > /sys/devices/platform/fe8a0000.usb2-phy/otg_mode
```

![usb_settings_urvepi](https://faq.urveboard.com/uploads/images/gallery/2023-04/BNFgmSq9iJXDPYHt-embedded-image-2uy4volq.png)

Once in OTG mode, you need to set ***"File Transfer" or "USB Tethering"*** in ***"Settings" / "Developer options" / "Default USB Configuration"*** and you can use ADB software to connect to your URVEPi. If you using Android Studio you should see URVEPi as "rockchip rk3566_r" device.

![android_studio_urvepi](https://faq.urveboard.com/uploads/images/gallery/2023-04/m6xkVlquCeyBtPkd-embedded-image-jijlehww.png)

To switch back to the default mode, simply enter the following command as a superuser:

```sh
su
echo host > /sys/devices/platform/fe8a0000.usb2-phy/otg_mode
```

With these simple commands, you can easily control the behavior of your URVEPi's OTG mode to suit your needs.