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Name of tool | Type | Picture | ||||
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ST-LINK | Hardware | 
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USB cable (please buy locally, it is commonly used) | Hardware | 
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PC or laptop | Hardware | / | ||||
ST Visual Programmer (for chip STM8L051F3)
| PC software | 
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Latest firmware V000101 for 821/M4
| Firmware |
Instruction of update
Settings of STVP software
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Download the firmware to the device
step1：Make connection “Device - ST-LINK - PC”
Use a 4pin cable to connect ST-LINK with the board of device
Also use a Mini USB cable to link the ST-LINK to the PC, then the LED of ST-LINK should be ALWAYS ON (if the LED is flashing, please do the reconnection, or reopen the STVP software)
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step2：Download the firmware to the device.
| Info |
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No need to power up the device during the download. But if fail to download with warning, can power up the device and retry the update |
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For chip STM32
If using chip STM32G030F6, the FW version should be [20211208] V000200 or below.
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Download the firmware to the device
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