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1		- **Contents:**
	1	+Contents:
2	2
3	3	{{toc/}}
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86	86
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"]]
88	88
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.
102	102
103	103	)))
104		-)))
105	105
106	106	== 3.3 Trouble shooting ==
107	107