Firmware
DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.5.R.250831.zip
Dahua firmware released Aug 31, 2025. May work with 6 devices, including IPC-BF4C-4G, IPC-BF4C-4G-K, IPC-BF4C-4G-MAX.
- Released
- Aug 31, 2025
- Version
- V2.820.0000000.5.R
- Size
- 28.6 MB
- Hardware
- 6 devices
Download
Permanent copy on the Internet Archive (item page)
- MD5
84697e1ce322a245431119a0ea55dec3- SHA-256
000f8905129ce36744c480fc0cbe6752863da5a4d77a8f5e94ddd3394be051bb
Where it's published
Recovered from the Wayback Machine
Dahua
Wayback Machine (materialfile.dahuasecurity.com)
Wayback copyCaptured Oct 19, 2025 from
https://materialfile.dahuasecurity.com/uploads/cpq/SWR/3389790/M/DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.5.R.250831.zip- Recovered from the Wayback Machine (captured 2025-10-19)
V2.820.0000000.5.R · Listed date Aug 31, 2025
Compatible hardware
Hardware IDs this firmware's installer accepts (6 devices).
- IPC-BF4C-4G
- IPC-BF4C-4G-K
- IPC-BF4C-4G-MAX
- IPC-HFW2441DG-4G-SP
- IPC-HFW2441DG-4G-SP-MAX
- IPC-HFW2441DG-MAX-JAPAN
Where these IDs come from
- hwid in DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.5.R.250831.bin: the device's own hardware check list, 6 IDs
- Install in DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.5.R.250831.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_V2.820.0000000.5.R.250831.bin: the device's own hardware check list, 6 IDs
Technical details
Read from inside the firmware (zip archive).
- Architecture
- arm
- OEM build
- General
- Image dates
- Aug 31, 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).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| U-Boot | 0x140000 | 0x2c0000 | 1.5 MB | dhboot.bin.img | — | 2025-08-31 |
| RTOS | 0x640000 | 0xb40000 | 5.0 MB | rtos.img | — | 2025-08-31 |
| Kernel | 0xb40000 | 0x1040000 | 5.0 MB | kernel.img | — | 2025-08-31 |
| romfs | 0x1040000 | 0x2040000 | 16.0 MB | romfs-x.Ramdisk.img | — | 2025-08-31 |
| user | 0x2040000 | 0x2840000 | 8.0 MB | user-x.squashfs.img | squashfs | 2025-08-31 |
| rofile | 0x5a40000 | 0x6340000 | 9.0 MB | rofiles.bin.img | — | 2025-08-31 |
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.
Related firmware
Other files for much of the same hardware, from any vendor.
- DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.21.R.260804.zip
Released Aug 14, 2026 · V2.820.0000000.21.R · 9 devices · Dahua
- DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.20.R.260715.zip
Released Aug 4, 2026 · V2.820.0000000.20.R · 9 devices · Dahua
- DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.10.R.251107.zip
Released Nov 22, 2025 · V2.820.0000000.10.R · 9 devices · Dahua
- DH_IPC-HX2XXX-4G-Cauchy_Eng_PN_V2.820.0000000.3.R.250315.bin
Released Mar 15, 2025 · V2.820.0000000.3.R · 5 devices · Dahua