.D2FW File Extension

DALI Firmware Image

Developer IEC
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What is a D2FW file?

A D2FW file is a firmware update used by an IEC 62386-105 compliant lighting control gear or control device. It contains data used to fix a bug or add features to the device's current firmware. The D2FW format and the IEC 62386-105 specification are developed by the International Electrotechnical Commission (IEC), in concert with the DALI Alliance.

More Information

In 2020, the IEC published the first edition of their 62386-105 specification. This document defined the D2FW file format. (The second edition of the 62386-105 specification is expected to be published in April 2024.)

Lighting control gear and control device manufacturers can save and distribute firmware updates in the D2FW format. Control gear and control device users can then install these firmware updates to fix bugs or add features to the associated device.

NOTE: DALI (Digital Addressable Lighting Interface) is an internationally-standardized protocol for digital communication between lighting control devices.

How to open a D2FW file

For instructions on how to install the firmware update your D2FW file contains, refer to your lighting control gear or control device's documentation. If necessary, you can also open a D2FW file with a text editor to view the file's header text, which describes its contents.

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Programs that open or reference D2FW files

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Refer to your lighting control gear or control device's documentation

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