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VTH5221D(W)

ASM lists 2 firmware files for the VTH5221D(W). 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
May 5, 2017
Listed by
ASM
Dahua device IDs
10

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.