Firmware
DH_IPC-WHX-Hertz2_Eng_PN_V2.840.0000000.9.R.20250515.zip
Dahua firmware released Jul 3, 2025. May work with 7 devices, including IPC-A42EN-S2-Cayenne, IPC-C42EN-S2-Cayenne, IPC-E2AP.
- Released
- Jul 3, 2025
- Version
- V2.840.0000000.9.R
- Size
- 7.4 MB
- Hardware
- 7 devices
Download
Permanent copy on the Internet Archive (item page)
- MD5
dd5d78f190c89428c32266a0d302c9e6- SHA-256
76e7aaa229acce0893149b953cdc477024e976fe1359666761fb4508bd7fb5c1- Changelog
- Release notes
Where it's published
Available from
Dahua
Dahua Download Center
CurrentSold as
V2.840.0000000.9.R · Listed date Jul 3, 2025
Compatible hardware
Hardware IDs this firmware's installer accepts (7 devices).
Where these IDs come from
- hwid in DH_IPC-WHX-Hertz2_Eng_PN_V2.840.0000000.9.R.20250515.bin: the device's own hardware check list, 7 IDs
- Install in DH_IPC-WHX-Hertz2_Eng_PN_V2.840.0000000.9.R.20250515.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
- check.img in DH_IPC-WHX-Hertz2_Eng_PN_V2.840.0000000.9.R.20250515.bin: the device's own hardware check list, 7 IDs
Technical details
Read from inside the firmware (zip archive).
- Architecture
- arm
- OEM build
- General
- Kernel
- Linux 4.9.84
- Flash
- 8.0 MB
- Image dates
- May 15, 2025
- Security
- Signed, not encrypted, security baseline V2.1
- Language & video
- English by default · PAL
Flash layout: 6 partitions, 4 written by this firmware
From the firmware's partition table (partitionV2.txt).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| U-Boot | 0x0 | 0x30000 | 192.0 KB | dhboot.bin.img | — | 2025-05-15 |
| hwid | 0x30000 | 0x40000 | 64.0 KB | not written | — | — |
| partition(ro) | 0x40000 | 0x50000 | 64.0 KB | partition-x.cramfs.img | cramfs | 2025-05-15 |
| Kernel | 0x50000 | 0x1a0000 | 1.3 MB | kernel.img | — | 2025-05-15 |
| romfs(ro) | 0x1a0000 | 0x7b0000 | 6.1 MB | romfs-x.squashfs.img | squashfs | 2025-05-15 |
| config | 0x7b0000 | 0x800000 | 320.0 KB | not written | jffs2 | — |
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 V2.1 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-WHX-Hertz2_Eng_PN_V2.840.0000000.6.R.20240605.zip
Released Jun 11, 2024 · V2.840.0000000.6.R · 7 devices · Dahua
- DH_IPC-WHX-Hertz2_Eng_PN_V2.840.0000000.3.R.20240119.zip
Released Jan 19, 2024 · V2.840.0000000.3.R · 7 devices · Dahua