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1		-XWiki.Bei
	1	+XWiki.Xiaoling

Content

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33	33	)))|(% style="width:409px" %)[[Hardware Connection Photo>>||anchor="H3.1.3RS485-BL2FLDDS752FLDDS202FLSE01"]]|(% style="width:204px" %)[[Hardware Connect Photo>>||anchor="H4.1.4RS485-BL2FLDDS752FLDDS202FLSE01"]]
34	34	|(% style="width:284px" %)[[LTC2>>url:https://www.dragino.com/products/temperature-humidity-sensor/item/170-ltc2.html]]|(% style="width:409px" %)×|(% style="width:204px" %)[[Hardware Connect Photo>>||anchor="H4.1.5LTC2"]]
35	35
	36	+
36	36	= 3. UART Upgrade Guide =
37	37
38	38	== 3.1 Hardware Connection ==
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69	69	* **Put Switch SW1 to ISP position**
70	70	* **Connect JP2 jumper (Yellow one), so device is power on.**
71	71
	73	+
72	72	== 3.2 Upgrade Steps ==
73	73
74	74
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112	112	)))
113	113
114	114	(((
115		-(((
116	116	(% style="color:blue" %)**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.
117	117	)))
118		-)))
119	119
120	120	(((
121		-(((
122	122	(% style="color:blue" %)**Step 6:**(%%) Always run AT+FDR after update firmware. This is to reset the device to factory settings of the new firmware.
123		-
124	124	)))
125		-)))
126	126
	124	+
127	127	== 3.3 Trouble shooting ==
128	128
129	129	=== 3.3.1 General Check List ===
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137	137	1. If you use Windows10 system. Please change the flash loader to run in Windows7 compatibility mode.
138	138	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.
139	139
	138	+
140	140	== 3.4 Flash Loader ~-~- Unable to Load data from this file ==
141	141
142	142
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148	148
149	149	)))
150	150
	150	+
151	151	(((
152		-(((
153	153	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.
154		-
155		-
156	156	)))
157		-)))
158	158
	155	+
159	159	== 3.5 Alternative method to flash via UART ==
160	160
161	161
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187	187	* **ST-LINK v2 SWCLK  <~-~->  Dupont Cable green pin**
188	188	* **ST-LINK v2 SWDIO  <~-~->  Dupont Cable white pin**
189	189
	187	+
190	190	=== 4.1.3 LAQ4 ST-Link v2 Connection ===
191	191
192	192
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211	211	* **ST-LINK v2 SWDIO  <~-~->  SWDIO**
212	212	* **ST-LINK (VDD 3.3v,pin19)  <~-~->  ST-LINK (TVCC ,pin1) a wire to connect two pins of ST-Link together.**
213	213
	212	+
214	214	=== 4.1.5 LTC2 ===
215	215
216	216
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227	227	* **ST-LINK v2 SWDIO  <~-~->  LTC2 SWDIO**
228	228	* **ST-LINK (VDD 3.3v,pin19)  <~-~->  ST-LINK (TVCC ,pin1) a wire to connect two pins of ST-Link together.**
229	229
	229	+
230	230	= 4.2. Firmware upgrade using STM32 Cubeprogramer =
231	231
232	232
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279	279	RESET pin not function
280	280	)))
281	281
282		-(((
283		-
284		-)))
285	285
286	286	(((
287		-(((
288	288	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.
289	289	)))
290		-)))
291	291
292	292	(((
293	293	For LHT65 we recommend to use the white one show in possible issue 2.
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338	338	(% style="color:blue" %)**step2: **(%%) Click yes to upgrade successfully.
339	339
340	340
341		-
342	342	== 5. Other Method ==
343	343
344	344
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369	369	Click Global Icon
370	370
371	371
372		-(% style="color:blue" %)**Step 5**(%%)**:** **Please select the mode as Connect under reset.**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.
	366	+(% style="color:blue" %)**Step 5**(%%)**:** **Please select the mode as Connect under reset. **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.
373	373
374	374
375	375	[[image:image-20230329155929-3.png]]