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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"]]
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	37	+
37	37	= 3. UART Upgrade Guide =
38	38
39	39	== 3.1 Hardware Connection ==
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75	75	* **Connect JP2 jumper (Yellow one), so device is power on.**
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	79	+
78	78	== 3.2 Upgrade Steps ==
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131	131	=== 3.3.1 General Check List ===
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133	133
134		-1. Double check if follow up exactly the steps as manual.
	136	+~1. Double check if follow up exactly the steps as manual.
135	135
136		-1. Check if hardware works fine:
	138	+2. Check if hardware works fine:
137	137
138		-1*. check if AT command works, in both TX/RX
	140	+* check if AT command works, in both TX/RX
	141	+* check if the device are in upgrade mode, see product manual for upgrade mode indicator.
	142	+* check if reset button works
139	139
140		-1*. check if the device are in upgrade mode, see product manual for upgrade mode indicator.
	144	+3. If you use Windows10 system. Please change the flash loader to run in Windows7 compatibility mode.
141	141
142		-1*. check if reset button works
	146	+4. 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.
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144		-1. If you use Windows10 system. Please change the flash loader to run in Windows7 compatibility mode.
145	145
146		-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.
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148		-
149	149	== 3.4 Flash Loader ~-~- Unable to Load data from this file ==
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