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87	87	[[image:https://wiki.dragino.com/images/thumb/0/09/STM32_UART_Upgrade_5.png/600px-STM32_UART_Upgrade_5.png||height="385" width="600"]]
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89		-(((
90	90	UART Upgrade
91		-)))
92	92
93	93	(((
94		-(((
95	95	Step 5: For switch type ISP Mode, After upgrade,please remember to switch back to Flash mode and press RESET Button to run the firmware.
96	96	)))
97		-)))
98	98
99	99	(((
100		-(((
101	101	Step 6: Always run AT+FDR after update firmware. This is to reset the device to factory settings of the new firmware.
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103	103	)))
104		-)))
105	105
106	106	== 3.3 Trouble shooting ==
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120	120	[[image:https://wiki.dragino.com/images/9/96/FlashLoader-troube_1.png||height="521" width="399"]]
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122		-(((
123	123	Unable to Load data from this file
124		-)))
125	125
126	126	(((
127		-(((
128	128	The previous LSN50 firmware file is stored in github. If user use right click ~-~-> Save As to get the hex file. This error will happen. Now the LSN50 firmware file has been moved to [[LSN50 Firmware>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Firmware/]] to avoid this happen.
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130		-)))
131	131
132	132	== 3.5 Alternative method to flash via UART ==
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216	216	Click Global Icon
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	208	+(((
218	218	**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
	210	+)))
219	219
220	220	[[image:https://wiki.dragino.com/images/thumb/2/20/ST-LINK-troube_2.png/600px-ST-LINK-troube_2.png||height="366" width="600"]]
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222	222	Do not click OK, click Cancel
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	216	+(((
224	224	**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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225	225
226	226	[[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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264	264	(((
265	265	User can try to mannual reset when use this type of ST-Link, touch the reset pin to GND pin and click the global icon in the ST Utility, If the other 3 wire connection is fine, the ST-LInk adapter LED will blink. and then release the reset. The IC should be detected.
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269	269	(((
270	270	For LHT65 we recommend to use the white one show in possible issue 2.
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273	273	(((
	272	+
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274	274	For LGT92, if user use this type of ST-Link, please also connect the 5v to USB port of LGT92
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