Firmware

DHI_HYSA21A-W2_Eng_MCU_V1.000.0000005.0.R.20251107.zip

Dahua firmware released Nov 28, 2025. Microcontroller firmware.

Released: Nov 28, 2025
Version: V1.000.0000005.0.R
Size: 105.1 KB
Hardware: Microcontroller firmware

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5: 81dbd8433fdb1660568569f39b261b34
SHA-256: b6a849545d02c237946aa9a21467113b40fc4acc0015a9623f3461150290c791

Where it's published

Available from
Dahua
Dahua Download Center
Current
Sold as
- HY-SA21A-W2
V1.000.0000005.0.R · Listed date Nov 28, 2025
Vendor link (materialfile.dahuasecurity.com)

Compatible hardware

This is microcontroller firmware (an Intel HEX image): it updates a small chip inside a device, such as a PTZ motor controller, door station or access controller, not the device's main system. It has no operating system and no list of supported hardware.