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225	225	Click Global Icon
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227	227	**Step 5**: After click the Global ICon in Step4, The led on the ST-LINK v2 adapter will now blinks, if you use hand to press the reset button , you need to release the reset button when see the LED blinks, and the ST-Link will detect the STM32 hardware as below. Click cancel to enter next step. Please check hardware connection if ST-Link v2 LED doesn't blink
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229	229	[[image:image-20220526175307-20.png]]
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231	231	Do not click OK, click Cancel
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233	233	**Step 6: **Click verify/upgrade firmware. The ST-Link utility will pop up a download window. Click the start button to download the image to Device.
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235	235	[[image:https://wiki.dragino.com/images/thumb/9/9a/STM32_ST-Link_Upgrade_3.png/600px-STM32_ST-Link_Upgrade_3.png||height="389" width="600"]]
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242	242	=== 4.3.1 ST-Link v2 can not detect the hardware ===
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244		-Possible Issue 1:
	246	+**Possible Issue 1:**
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246	246	1. Make sure see the LED blink on the ST-Link and release the reset button during blinking.
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248		-Possible Issue 2:
	250	+**Possible Issue 2:**
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250	250	1. There are different version ST-Link v2. The white one as below is the most stable and recommended one.
251	251	1. The white version ST-Link v2 such as below photo has different hardware version. The original one doesn’t have 3.3v on pin 1/2 and the clone one has 3.3v on pin 1/2. User has to short pin19 (VDD 3.3v) and pin 1/2 (TVCC) for the original one so pin 1/2 has 3.3v power. Otherwise, the original one might have problem to upload firmware to End Node.
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253		-[[image:https://wiki.dragino.com/images/thumb/e/e4/ST-Link_upload_issue111.jpg/600px-ST-Link_upload_issue111.jpg||height="450" width="600"]]
	255	+[[image:image-20220526175418-21.png]]
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255	255	ST-Link upload issue
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319	319	**step2:**Click yes to upgrade successfully.
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