Model	Old version, date	Latest version, date
DT-BDU	All old versions could be updated	STM32程序待发布，找曾工
DT821/VD		STM32程序，SD或ST-LINK （曾工）
DT821/T5		AUTOWRITE (待发布，找楠要新版）
DT821/M4	[20200827] V000100（old chip STM8L051X3) [20211208] V000200 (new chip STM32G030F6)	[20211229] V000101 (old chip) [20211229] V000201 (new chip)，需用stm32cubeprg PC程序

Old version Upgraded Guidance

Three update tools are required as below:

Name of tool	Picture
1. ST-LINK	Image Added

...

USB TOOL

2. USB tool (could get from Video-Tech)	Image Added
3. Micro SD card	Image Added

DT-BDU (Update by ST-LINK)

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