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Firmware

DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.10.R.251107.zip

Dahua firmware released Nov 22, 2025. May work with 9 devices, including IPC-BF4C-4G, IPC-BF4C-4G-K, IPC-BF4C-4G-MAX.

Released
Nov 22, 2025
Version
V2.820.0000000.10.R
Size
28.9 MB
Hardware
9 devices

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5
9849503041d233598e09b8f884103f39
SHA-256
eb98169dac0419d424617ae20d5114c7a4bf03c923d3a6a3c47d7b70a040cdfd
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_V2.820.0000000.10.R.251107.bin: the device's own hardware check list, 9 IDs
  • Install in DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.10.R.251107.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_V2.820.0000000.10.R.251107.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
Nov 7, 2025
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—2025-11-07
RTOS0x6400000xb400005.0 MBrtos.img—2025-11-07
Kernel0xb400000x10400005.0 MBkernel.img—2025-11-07
romfs0x10400000x204000016.0 MBromfs-x.Ramdisk.img—2025-11-07
user0x20400000x28400008.0 MBuser-x.squashfs.imgsquashfs2025-11-07
rofile0x5a400000x63400009.0 MBrofiles.bin.img—2025-11-07

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.