Also, Pi-KVM can be connected to a multi-port HDMI/USB switch and the switch's buttons can be connected via optocouplers to [the Pi's GPIO to switch channels](gpio.md).
If your KVM switches channels using keyboard shortcuts, there is a chance that it will not be able to work with OTG (v2 platform, see below), since it does not fully implement the USB stack. In this case, you will have to [use an Arduino board](arduino_hid.md) to emulate the keyboard & mouse (Pi-KVM supports this configuration).
*  - The switch does not work with OTG (**v2**) and requires an [Arduino HID](arduino_hid.md) or soldering [GPIO](gpio.md) to switch channels or something like that.
*  - The keyboard or mouse does not work at all, the switch loses the image, etc.
| [Ali's noname](https://a.aliexpress.com/_BSpS8t) |  | [Here are the details](https://github.com/pikvm/pikvm/issues/128) |
| [TESmart 8 PORT - HDMI KVM SWITCH](https://buytesmart.com/collections/8-ports) |  | Use OTG with USB 2.0 Hub only, no hotkey support. Switching available with serial or IP-to-serial interface using fixed IP (/31 peer-to-peer addressing supported). [Sample script on GitHub](https://github.com/bbeaudoin/bash/blob/master/kvmctl) |
