> For the complete documentation index, see [llms.txt](https://support.senterasensors.com/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.senterasensors.com/home/double-4k-sensor/double-4k/double-4k-updating-firmware.md).

# Double 4K - Updating Firmware

Follow the instructions below for downloading and installing the firmware update for your Double 4K/AGX710 Sensor.

\
**LED CODES:**\
Solid <mark style="color:red;">Red</mark> - Sensor is booting, do not take-off\
Solid <mark style="color:green;">Green</mark> - Ready for flight\ <mark style="color:red;">B</mark>l<mark style="color:red;">i</mark>n<mark style="color:red;">k</mark>i<mark style="color:red;">n</mark>g <mark style="color:red;">R</mark>e<mark style="color:red;">d</mark> - Error

## Identify Serial Number (S/N) <a href="#id-1_identify_serial_number_sn" id="id-1_identify_serial_number_sn"></a>

1. First, identify your product's serial number. The serial number is located on the sticker attached to the top or side of the sensor. See the images below for reference.&#x20;

<div align="left"><figure><img src="/files/RIguzkeZyVaJtzkmHOEA" alt=""><figcaption></figcaption></figure></div>

<div align="left"><figure><img src="/files/yynavKROwhUWWs6JBGz6" alt=""><figcaption></figcaption></figure></div>

## Download the Update <a href="#id-2_download_the_update" id="id-2_download_the_update"></a>

1. Select the appropriate firmware update below based on your serial number.&#x20;

<img src="https://img.zohostatic.com/zde/static/images/file.png" alt="" data-size="line"> <mark style="background-color:yellow;">**Note: Attempts to install the firmware on an incompatible product will fail, resulting in no changes to the performance or configuration of the device.**</mark>

* Serial numbers 199 or lower. This download is ONLY compatible with a Double 4K/AGX710 with a serial number 199 or lower: [Double 4K Firmware v1.5.2](https://workdrive.zohoexternal.com/external/fca81847948fdc6d939b50ded2ebef149ecbd49c5588ae40bf89fea767c54725/download)
* Serial numbers 200 or higher. This download is ONLY compatible with a Double 4K/AGX710 with a serial number 200 or higher. [Double 4K Firmware v1.5.2](https://workdrive.zohoexternal.com/external/529ecbb571e52de36aa3eb177c0b0dbfaed2c79d679645a2ee8ac85b083d1be7/download)

## Install the Update <a href="#id-3_install_the_update" id="id-3_install_the_update"></a>

After downloading the firmware update file:

1. Remove the SD card from the Double 4K sensor and insert into a computer.

<img src="https://img.zohostatic.com/zde/static/images/caution.png" alt="" data-size="line">  <mark style="background-color:red;">**WARNING: If you are using a new SD Card, ensure the card is formatted to FAT32.**</mark> [<mark style="background-color:red;">**FAQ: How to update to FAT32**</mark>](/home/double-4k-sensor/double-4k/faqs/faqs-how-do-i-use-a-new-microsd-card-with-my-sentera-sensor.md)

2. Copy the snapcam-ota-1.5.2.zip file for sensor 199 and under, and msM8996\_sc-ota-1.5.2.zip file for serial numbers 200 and above, to the Firmware Folder on the SD card. (DO NOT unzip the file; copy the entire zip file to the folder.)

{% embed url="<https://support.sentera.com/galleryDocuments/edbsn892dc8c58d7b2e2d2da247689565a67536cef5520cc115fb7618c1b3ac9a74581cf7b9ec4186bfaf76f1e2ada08eec1e?inline=true>" %}

3. Insert the SD card into the sensor.
4. Power on the system.
5. **Wait 15 minutes for the update to complete.** The Double 4K will automatically reboot a few times and the LED will blink a variety of colors. This is normal.
6. Power off the system.
7. Remove the SD card from the sensor.
8. View the /info/info.txt file on the SD Card.

<div align="left"><figure><img src="/files/5lgfzcVraGW8v2RAfy60" alt="" width="241"><figcaption></figcaption></figure></div>

9. Verify that the Filesystem Version is the expected new version to confirm that the update was successfully applied. Example below:

<div align="left"><figure><img src="/files/qldHjdgcRapwELActjFd" alt="" width="321"><figcaption></figcaption></figure></div>

10. Insert the SD card into the sensor. The update is complete.

{% content-ref url="/pages/8iiv0ECXC2rUvQxStIw8" %}
[Double 4K - Firmware Release Notes](/home/double-4k-sensor/double-4k/double-4k-firmware-release-notes.md)
{% endcontent-ref %}