> For the complete documentation index, see [llms.txt](https://docs.acecentre.org.uk/products/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acecentre.org.uk/products/relaykeys/installation/supported-boards/raytac-dongle-nrf52840-usb-key-with-tinyuf2-bootloader-mdbt50q-rx.md).

# Raytac dongle - nRF52840 USB Key with TinyUF2 Bootloader MDBT50Q-RX

![](https://1065911005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ftmmq04xl8IrJjV6lZCnr%2Fuploads%2FjwECSIRqMrScbFv4Uzvr%2Fimage.png?alt=media\&token=7febed82-4987-4a67-95f6-024513973e6c)

Either use the drag and drop UF2 method or more steps involved - Arduino uploading method.\
\
For the UF2 method

* Download the UF2 file for the raytac dongle in the\_ [*current release*](http://github.com/acecentre/relaykeys/releases/latest)\_\_
* Press and hold thr reset button as you plug it into the computer. You will then get a USB drive on your computer. Drag and drop the UF2 file to the root of that drive.

![](https://1065911005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ftmmq04xl8IrJjV6lZCnr%2Fuploads%2FWD7Hvf2FgNfw9A2A59Nb%2Fuf2drag-drop.gif?alt=media\&token=b05217c0-c7b4-42cf-ad1f-2cc460f30d5e)

Or the Arduino uploading method.

* Check the setup of your [Arduino IDE](https://learn.adafruit.com/bluefruit-nrf52-feather-learning-guide/arduino-bsp-setup) (remember we're using the nRF52840 board!)
* Upload the [sketch](https://github.com/AceCentre/RelayKeys/blob/master/arduino/arduino_nRF52840/arduino_nRF52840.ino) to your feather.
* Run the server side code
* Done!


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.acecentre.org.uk/products/relaykeys/installation/supported-boards/raytac-dongle-nrf52840-usb-key-with-tinyuf2-bootloader-mdbt50q-rx.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.