Firmware
DH_IPC-PT-4G-AOVHB-Cauchy_Eng_PN_V2.820.0000000.21.R.260820.zip
Dahua firmware released Sep 2, 2026. May work with 1 device, including IPC-BP6XP-E2Z-4G.
- Released
- Sep 2, 2026
- Version
- V2.820.0000000.21.R
- Size
- 31.6 MB
- Hardware
- 1 device
Download
Download firmware
Permanent copy on the Internet Archive (item page)
- MD5
e1dc236a143c462d1f7f0b3bec4700c5- SHA-256
09c21af4d500d6bb5058f81c0b774ebe738a0e774bf165529320c92e88dd476d- Changelog
- Release notes
Where it's published
Available from
Dahua
Dahua Download Center
CurrentSold as
V2.820.0000000.21.R · Listed date Sep 2, 2026
Compatible hardware
Hardware IDs this firmware's installer accepts (1 device).
Where these IDs come from
- hwid in DH_IPC-PT-4G-AOVHB-Cauchy_Eng_PN_V2.820.0000000.21.R.260820.bin: the device's own hardware check list, 1 ID
- Install in DH_IPC-PT-4G-AOVHB-Cauchy_Eng_PN_V2.820.0000000.21.R.260820.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
- check.img in DH_IPC-PT-4G-AOVHB-Cauchy_Eng_PN_V2.820.0000000.21.R.260820.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
- Aug 20, 2026
- Security
- Signed, security baseline V2.4
- Language & video
- English by default · PAL
- Software version
- V2.820.0000000.21.R.260820
Flash layout: 4 partitions, 4 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 | — | 2026-08-20 |
| Kernel | 0x640000 | 0x1040000 | 10.0 MB | kernel.img | — | 2026-08-20 |
| romfs | 0x1040000 | 0x2c40000 | 28.0 MB | romfs-x.squashfs.img | squashfs | 2026-08-20 |
| rofile | 0x5240000 | 0x6340000 | 17.0 MB | rofiles.bin.img | — | 2026-08-20 |
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.