> For the complete documentation index, see [llms.txt](https://docs.keyclicks.ca/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.keyclicks.ca/nrf-firmware-update-fix-connection-issues/flash-firmware-with-nrf-connect-app.md).

# Flash firmware with nRF Connect APP

Download nRF connect APP

{% embed url="<https://www.nordicsemi.com/Products/Development-tools/nrf-connect-for-mobile>" %}

Download dongle firmware

{% file src="/files/srU9lIpQzoVUXbXzX2bn" %}

Download Firmware files to your Phone from "nRF firmware download" Tab

Step 1

Turn keyboard off, press and HOLD 4 keys then turn keyboard on.&#x20;

<figure><img src="https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FAFyI0KV9FWlQkEJFxSAk%2FErgo_layout.png?alt=media&amp;token=42a587ee-ba7a-406d-8b7f-a5dd3f32c708" alt="" width="563"><figcaption><p>Ergo</p></figcaption></figure>

<figure><img src="https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FNde5qFcxZS5V9d9Sxid5%2FErgolite_layout.png?alt=media&amp;token=d793959d-20a4-4b9b-98f9-507d5cedf453" alt="" width="563"><figcaption><p>Ergolite</p></figcaption></figure>

<figure><img src="https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FJmfjpmrVy5gJZTjk2fm3%2FSnipaste_2024-06-02_00-30-53.jpg?alt=media&amp;token=3d1c7dd0-bfab-438c-a58c-e38a5bf81f6c" alt="" width="563"><figcaption></figcaption></figure>

Step 2

Open nRF Connect App, will see KCDFU in the Scanner tab, then connect it.

![](https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2F1UIfvlzLaqtZMytRB0Yq%2F%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20230822073239.jpg?alt=media\&token=f26a3c44-faba-420b-869a-51c9b9229dc6)![](https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FE4Srw3nDXv3WNakHpAg9%2F%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20230822073241.png?alt=media\&token=26d07c21-7281-400d-a418-300bda00719e)

Step 3&#x20;

Click "Open Document Picker", select the file you downloaded earlier (Which Keyboard/side you have?) then click "Start".

![](https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FsfDe293grOSuzd2EWGE8%2F%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20230822073242.png?alt=media\&token=d0b250e1-edd2-4617-aba1-8717bcd4886a)![](https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FKoCF0wT49H0rXn6Y5ybm%2F%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_202308220732421.png?alt=media\&token=5d47d563-7a84-495e-a85b-f2c6ca2fcca7)

Step 4

Waiting for the progress bar to reach 100%. Done! Do step 1-4 on the other side.

![](https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FwKtyihcGXkuSbZOQ6omc%2F%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20230822073253.png?alt=media\&token=befa9a7b-3935-41d4-b4a7-e5bcfdb2149f)

Step 5\
\
Flash firmware on 2.4g wireless dongle(receiver), press and HOLD the DFU button then plug it.\
Do step 2,3,4.

<figure><img src="https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2F9kG5Qx39pfSbYo3Vgezg%2FDongle.jpg?alt=media&amp;token=8b6a4301-e1cc-4b67-bb23-3819a196b8ee" alt="" width="375"><figcaption></figcaption></figure>

<figure><img src="https://1055807234-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtTqrOuap7UZjPuISBkhS%2Fuploads%2FM2eW05ggCoV3gfe3DjvN%2FReceiver_V1_Bot%20-%20Copy.jpg?alt=media&amp;token=baef3c17-0eea-4978-a40e-f36468f4959f" alt="" width="375"><figcaption></figcaption></figure>