Firmware

General_ARD2251E-W2_433_V1.000.0000009.0.R.260306.zip

Dahua firmware released May 7, 2026. Microcontroller firmware.

Released: May 7, 2026
Version: V1.000.0000009.0.R
Size: 1.8 MB
Hardware: Microcontroller firmware

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5: c96a8952e8de56829dab69a52ad7975a
SHA-256: bede7e93eda517b14ffbb1cd4e3be85bb3923c7df73f6bcceabd22f086422fd9
Changelog: Release notes

Where it's published

Available from
Dahua
Dahua Download Center
Current
Sold as
- ARD2251E-W2
- ARD2251E-W2(V)
V1.000.0000009.0.R · Listed date May 7, 2026
Vendor link (materialfile.dahuasecurity.com)

Compatible hardware

This is microcontroller firmware in Dahua's MCU upgrade format: it updates a small chip inside a device, such as a PTZ motor controller, door station or access controller, not the device's main system. It has no operating system and no list of supported hardware.