# CAN transceivers

The RDDRONE-FMUK66 features two [CAN (Controller Area Network) busses](https://en.wikipedia.org/wiki/CAN_bus). PX4 implements the [UAVCAN protocol](https://en.wikipedia.org/wiki/UAVCAN), and supports some motor controllers, sensors and GPS solutions with a CAN interface. The current HoverGames kit does not include any hardware with a CAN interface, except the FMU itself.

{% embed url="<https://dev.px4.io/en/uavcan/>" %}

## Connector pinout

| Pin | Signal | Voltage |
| --- | ------ | ------- |
| 1   | VCC    | +5.0V   |
| 2   | CAN H  | +3.3V   |
| 3   | CAN L  | +3.3V   |
| 4   | GND    | GND     |

## RDDRONE-FMUK66 Rev. C schematics

![](https://1329960936-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-L9GLtb-Tz_XaKbQu-Al%2F-LVsC1W9Lh4_z_Pu846c%2F-LVsE9nyq2eJ35Wm1hh3%2FC-CAN0.png?alt=media\&token=d257201a-6702-4b07-a3bd-4a23e075123b)

![](https://1329960936-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-L9GLtb-Tz_XaKbQu-Al%2F-LVsC1W9Lh4_z_Pu846c%2F-LVsEBbNV5l01XMu0flc%2FC-CAN1.png?alt=media\&token=a06a64b9-f8b3-441d-99d3-6b81bf0afaec)

## RDDRONE-FMUK66 Rev. B schematic

{% hint style="danger" %}
Rev. B (and older boards) are **not supported** anymore. This information is left for reference.
{% endhint %}

![](https://1329960936-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-L9GLtb-Tz_XaKbQu-Al%2F-LOrvCVzlhjwif35PmiG%2F-LOruD3SJYTMdyijsWVp%2FCAN.PNG?alt=media\&token=02876f47-f795-4270-88cb-b499fbbccbbc)