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VTH5221D-W-S2_5241D-W-S2_2421FB-W-S2

Global DS lists 2 firmware files for the VTH5221D-W-S2_5241D-W-S2_2421FB-W-S2. This is the retail model name. Inside the firmware, Dahua uses its own device IDs, listed below, which can lead you to more compatible firmware.

Firmware files
2
Newest
Aug 29, 2019
Listed by
Global DS
Dahua device IDs
5

Vendor notes

Firmware

Dahua device IDs in this firmware

Compare these with the updateSerial your device reports. Each one links to every firmware found for that ID.