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Firmware

DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.21.R.260804.zip

Dahua firmware released Aug 14, 2026. May work with 9 devices, including IPC-BF4C-4G, IPC-BF4C-4G-K, IPC-BF4C-4G-MAX.

Released
Aug 14, 2026
Version
V2.820.0000000.21.R
Size
29.9 MB
Hardware
9 devices

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5
9f6f866f4ee6b1c0f8bff8d77da1a5dc
SHA-256
edb1751decbc869502483c6ff7aeea9251fe87cb6fde22adfcf8bffd60044143
Changelog
Release notes

Where it's published

Compatible hardware

Hardware IDs this firmware's installer accepts (9 devices).

Where these IDs come from
  • hwid in DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.21.R.260804.bin: the device's own hardware check list, 9 IDs
  • Install in DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.21.R.260804.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
  • check.img in DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.21.R.260804.bin: the device's own hardware check list, 9 IDs

Technical details

Read from inside the firmware (zip archive).

Architecture
arm
OEM build
General
Image dates
Aug 4, 2026
Security
Signed, security baseline V2.4
Language & video
English by default · PAL
Software version
V2.820.0000000.21.R.260804
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—2026-08-04
RTOS0x6400000xb400005.0 MBrtos.img—2026-08-04
Kernel0xb400000x10400005.0 MBkernel.img—2026-08-04
romfs0x10400000x204000016.0 MBromfs-x.Ramdisk.img—2026-08-04
user0x20400000x28400008.0 MBuser-x.squashfs.imgsquashfs2026-08-04
rofile0x5a400000x63400009.0 MBrofiles.bin.img—2026-08-04

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.