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Firmware

DH_IPC-WDB-Cauchy_Eng_PN_V2.820.0000000.11.R.260204.zip

Dahua firmware released Feb 4, 2026. May work with 1 device, including DB43BP-BTR.

Released
Feb 4, 2026
Version
V2.820.0000000.11.R
Size
29.4 MB
Hardware
1 device

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5
c0b84fde1ab7a48f100b2c3fa235bb8f
SHA-256
b1789905280bde2b75e5e7bc8b466a027cebfd4bcd0e7d5b4a47f09122c366ad

Where it's published

Compatible hardware

Hardware IDs this firmware's installer accepts (1 device).

Where these IDs come from
  • hwid in DH_IPC-WDB-Cauchy_Eng_PN_V2.820.0000000.11.R.260204.bin: the device's own hardware check list, 1 ID
  • Install in DH_IPC-WDB-Cauchy_Eng_PN_V2.820.0000000.11.R.260204.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
  • check.img in DH_IPC-WDB-Cauchy_Eng_PN_V2.820.0000000.11.R.260204.bin: the device's own hardware check list, 1 ID

Technical details

Read from inside the firmware (zip archive).

Architecture
arm
OEM build
General
Image dates
Feb 4, 2026
Security
Signed, security baseline V2.4
Language & video
English by default · PAL
Flash layout: 6 partitions, 6 written by this firmware

From the image headers (only partitions this firmware writes).

PartitionStartEndSizeImageFilesystemBuilt
U-Boot0x1400000x2c00001.5 MBdhboot.bin.img—2026-02-04
RTOS0x6400000xb400005.0 MBrtos.img—2026-02-04
Kernel0xb400000x10400005.0 MBkernel.img—2026-02-04
romfs0x10400000x204000016.0 MBromfs-x.Ramdisk.img—2026-02-04
user0x20400000x28400008.0 MBuser-x.squashfs.imgsquashfs2026-02-04
rofile0x52400000x660000019.8 MBrofiles.bin.img—2026-02-04

About the security baseline: firmware with a higher security baseline can stop a device going back to older firmware. A device already on a higher baseline than V2.4 may refuse this file, and after installing it you may not be able to downgrade to firmware with a lower baseline.

Other files for much of the same hardware, from any vendor.