> 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="/files/zV5mTJUuupMiaxTJA32V" alt="" width="563"><figcaption><p>Ergo</p></figcaption></figure>

<figure><img src="/files/I9grJdd8OFOix81QErm2" alt="" width="563"><figcaption><p>Ergolite</p></figcaption></figure>

<figure><img src="/files/UZx8ngT9eo5kZoGntyPk" alt="" width="563"><figcaption></figcaption></figure>

Step 2

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

![](/files/s7yXoMYQ20fZhufng4Gh)![](/files/wLkLxAxmJ4Hs2tHhaKZO)

Step 3&#x20;

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

![](/files/Nu92pF6s3BJ9X0bjn7VK)![](/files/tpYtXhmPcBHI4F1lU5CR)

Step 4

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

![](/files/KaUsE1pAQHzV7xnOaYaY)

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="/files/XxnRPikFphA5VzcKJxOv" alt="" width="375"><figcaption></figcaption></figure>

<figure><img src="/files/InrIujxyKP90tiSlA2I6" alt="" width="375"><figcaption></figcaption></figure>