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Connect device with ST-Link as below:
Install “sttoolset_pack32.exe”, and after install, click “ST Visual Programmer” in “Start” -> “ST toolset” to run the software “ST Visual Programmer”
Click “Configure ST Visual Programmer” as below. (if you are run this software first time, jump to step 4.)
with following window, select “ST-LINK”, “USB”, “SWIM” and “STM8L15xC8”, and click “OK”.
At the main menu, click on open to and located the firmware file:
On “Files of type:” select “All Files(*.*)”, and locate and select “embOS_STM8L_IX-850_V10_720P_20210922.hex”
After all files loaded, click “Program current tab or active sector” as below:
After a while when you see below message, the update is finish:
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