Firmware
DH_IPC-PT-4G-Cauchy_Eng_PN_V2.820.0000000.20.R.260715.zip
Dahua firmware released Aug 4, 2026. May work with 3 devices, including IPC-BP4AP-4G, IPC-BP4AP-4G-K, IPC-BP4AP-4GP.
- Released
- Aug 4, 2026
- Version
- V2.820.0000000.20.R
- Size
- 27.2 MB
- Hardware
- 3 devices
Download
Download firmware
Permanent copy on the Internet Archive (item page)
- MD5
3ff70497b649249bc829492aa4102922- SHA-256
0583ffec300b5e5811002033c3782dc1b1f3560f9a667a44e12a1fda9f94db7e- Changelog
- Release notes
Where it's published
Available from
Dahua
Dahua Download Center
CurrentSold as
V2.820.0000000.20.R · Listed date Aug 4, 2026
Compatible hardware
Hardware IDs this firmware's installer accepts (3 devices).
Where these IDs come from
- hwid in DH_IPC-PT-4G-Cauchy_Eng_PN_V2.820.0000000.20.R.260715.bin: the device's own hardware check list, 3 IDs
- Install in DH_IPC-PT-4G-Cauchy_Eng_PN_V2.820.0000000.20.R.260715.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-Cauchy_Eng_PN_V2.820.0000000.20.R.260715.bin: the device's own hardware check list, 3 IDs
Technical details
Read from inside the firmware (zip archive).
- SoC
- SigmaStar
- Architecture
- arm
- OEM build
- General
- Image dates
- Jul 15, 2026
- Security
- Signed, security baseline V2.4
- Language & video
- English by default · PAL
Flash layout: 7 partitions, 7 written by this firmware
From the image headers (only partitions this firmware writes).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| mini-Boot | 0x0 | 0x140000 | 1.3 MB | dhboot-min.bin.img | — | 2026-07-15 |
| U-Boot | 0x140000 | 0x2c0000 | 1.5 MB | dhboot.bin.img | — | 2026-07-15 |
| RTOS | 0x640000 | 0xb40000 | 5.0 MB | rtos.img | — | 2026-07-15 |
| Kernel | 0xb40000 | 0x1040000 | 5.0 MB | kernel.img | — | 2026-07-15 |
| romfs | 0x1040000 | 0x2040000 | 16.0 MB | romfs-x.Ramdisk.img | — | 2026-07-15 |
| user | 0x2040000 | 0x2840000 | 8.0 MB | user-x.squashfs.img | squashfs | 2026-07-15 |
| rofile | 0x5240000 | 0x6340000 | 17.0 MB | rofiles.bin.img | — | 2026-07-15 |
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.