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23	23	|(% style="width:444px" %)[[RS485-BL>>url:https://www.dragino.com/products/lora-lorawan-end-node/item/167-rs485-bl.html]], LDDS75,[[LLDS12>>url:https://www.dragino.com/products/distance-level-sensor/item/185-llds12.html]],LDDS20,[[LSE01>>https://www.dragino.com/products/agriculture-weather-station/item/159-lse01.html]],WSC1-L,GroPoint Air|(% style="width:239px" %)[[Hardware Connection Photo>>url:https://wiki.dragino.com/index.php/Firmware_Upgrade_Trouble_Shooting#RS485-BL.2FLDDS75.2FLDDS20.2FLSE01]]|(% style="width:204px" %)[[Hardware Connect Photo>>url:https://wiki.dragino.com/index.php/Firmware_Upgrade_Instruction_for_STM32_base_products#RS485-BL.2FLDDS75.2FLDDS20.2FLSE01_2]]
24	24	|(% style="width:444px" %)[[LTC2>>url:https://www.dragino.com/products/temperature-humidity-sensor/item/170-ltc2.html]]|(% style="width:239px" %)×|(% style="width:204px" %)[[Hardware Connect Photo>>url:https://wiki.dragino.com/index.php/Firmware_Upgrade_Instruction_for_STM32_base_products#LTC2]]
25	25
	26	+
26	26	= 3. UART Upgrade Guide =
27	27
28	28	== 3.1 Hardware Connection ==
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29	29
30	30	=== 3.1.1 LSN50 v1 ===
31	31
32		-[[image:image-20220511163746-2.png||height="322" width="433"]]
	33	+[[image:image-20220511163746-2.png]]
33	33
34	34	Connection for LSN50 v1
35	35
36	36	=== 3.1.2 LSN50 v2/LSN50v2-D22/LSN50v2-D23 ===
37	37
38		-[[image:https://wiki.dragino.com/images/thumb/f/f8/STM32_UART_Upgrade_2.png/600px-STM32_UART_Upgrade_2.png||height="267" width="551"]]
	39	+[[image:https://wiki.dragino.com/images/thumb/f/f8/STM32_UART_Upgrade_2.png/600px-STM32_UART_Upgrade_2.png||height="291" width="600"]]
39	39
40	40	Connection for LSN50 Type V2
41	41
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53	53	* Put Switch SW1 to ISP position
54	54	* Connect JP2 jumper (Yellow one), so device is power on.
55	55
	57	+
56	56	== 3.2 Upgrade Steps ==
57	57
58	58	(((
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109	109	1. If you use Windows10 system. Please change the flash loader to run in Windows7 compatibility mode.
110	110	1. We see a case the FT232 USB TTL adapter has reliability issue with the PC USB chipset(Intel). In this case, even above, it still has serious reliability issue for uploading. If this happen, change a PC or change a USB to TTL adapter will solve.
111	111
	114	+
112	112	== 3.4 Flash Loader ~-~- Unable to Load data from this file ==
113	113
114	114	[[image:https://wiki.dragino.com/images/9/96/FlashLoader-troube_1.png||height="521" width="399"]]
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146	146	* ST-LINK v2 SWCLK <~-~-> Dupont green pin
147	147	* ST-LINK v2 SWDIO <~-~-> Dupont white pin
148	148
	152	+
149	149	=== 4.1.3 LAQ4 ST-Link v2 Connection ===
150	150
151	151	[[image:https://wiki.dragino.com/images/thumb/0/03/STM32_STLINK_Upgrade_LAQ4.png/600px-STM32_STLINK_Upgrade_LAQ4.png||height="331" width="600"]]
...	...	@@ -180,6 +180,7 @@
180	180	* ST-LINK v2 SWCLK <~-~-> LTC2 SWCLK
181	181	* ST-LINK v2 SWDIO <~-~-> LTC2 SWDIO
182	182
	187	+
183	183	== 4.2 ST-Link Upgrade Guide ==
184	184
185	185	(((
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227	227
228	228	1. Make sure see the LED blink on the ST-Link and release the reset button during blinking.
229	229
	235	+
230	230	Possible Issue 2:
231	231
232	232	1. There are different version ST-Link v2. The white one as below is the most stable and recommended one.
...	...	@@ -284,8 +284,8 @@
284	284
285	285	[[image:https://wiki.dragino.com/images/1/12/Stlink23.png||height="238" width="486"]]
286	286
287		-[[image:https://wiki.dragino.com/images/a/a2/Stlink24.png||height="128" width="230"]]
288		-
289	289	**step2:**Click yes to upgrade successfully.
290	290
291		-
	295	+[[image:https://wiki.dragino.com/images/a/a2/Stlink24.png||height="128" width="230"]]
	296	+
	297	+**step3:**