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	1	+ **Contents:**
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3	3	{{toc/}}
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12	12	|=(% colspan="3" style="width: 888px;" %)Dragino STM32 base hardware Upgrade Methods
13	13	|(% style="width:444px" %)**Model**|(% style="width:239px" %)**UART Connection**|(% style="width:204px" %)**ST-Link Connection**
14	14	|(% style="width:444px" %)[[LSN50 v1>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/128-lsn50.html]], [[LoRa ST>>url:http://www.dragino.com/products/lora/item/127-lora-st.html]],|(% style="width:239px" %)Hardware Connect Photo|(% style="width:204px" %)Hardware Connect Photo
15		-|(% style="width:444px" %)[[LGT92>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/142-lgt-92.html]], [[LBT1>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/165-lbt1.html]]|(% style="width:239px" %)×|(% style="width:204px" %)[[Hardware Connect Photo>>url:https://wiki.dragino.com/index.php/Firmware_Upgrade_Instruction_for_STM32_base_products#LGT92.2FLBT1_ST-Link_v2_Connection]]
	15	+|(% style="width:444px" %)[[LGT92>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/142-lgt-92.html]], [[LBT1>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/165-lbt1.html]]|(% style="width:239px" %)×|(% style="width:204px" %)[[Hardware Connect Photo>>||anchor="H4.1.2LGT922FLBT1ST-Linkv2Connection"]]
16	16	|(% style="width:444px" %)[[LT-33222-L>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/138-lt-33222-l.html]], [[LT-22222>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]|(% style="width:239px" %)Hardware Connect Photo|(% style="width:204px" %)×
17	17	|(% style="width:444px" %)[[LHT65>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/151-lht65.html]]|(% style="width:239px" %)×|(% style="width:204px" %)Hardware Connect Photo
18	18	|(% style="width:444px" %)[[RS485-LN>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/154-rs485-ln.html]]|(% style="width:239px" %)Hardware Connect Photo|(% style="width:204px" %)×
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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	+(((
89	89	UART Upgrade
	91	+)))
90	90
91	91	(((
	94	+(((
92	92	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.
93	93	)))
	97	+)))
94	94
95	95	(((
	100	+(((
96	96	Step 6: Always run AT+FDR after update firmware. This is to reset the device to factory settings of the new firmware.
97	97
98	98	)))
	104	+)))
99	99
100	100	== 3.3 Trouble shooting ==
101	101