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29	29	|(% style="width:444px" %)[[RS485-BL>>url:https://www.dragino.com/products/lora-lorawan-end-node/item/167-rs485-bl.html]], [[LDDS75>>https://www.dragino.com/products/distance-level-sensor/item/161-ldds75.html]],[[LLDS12>>url:https://www.dragino.com/products/distance-level-sensor/item/185-llds12.html]],[[LDDS20>>https://www.dragino.com/products/distance-level-sensor/item/164-ldds20.html]],[[LSE01>>https://www.dragino.com/products/agriculture-weather-station/item/159-lse01.html]],[[WSC1-L>>https://www.dragino.com/products/agriculture-weather-station/item/206-wsc1-l.html]],[[GroPoint Air>>https://www.dragino.com/products/agriculture-weather-station/item/227-gropoint-air.html]]|(% style="width:239px" %)[[Hardware Connection Photo>>||anchor="H3.1.3RS485-BL2FLDDS752FLDDS202FLSE01"]]|(% style="width:204px" %)[[Hardware Connect Photo>>||anchor="H4.1.4RS485-BL2FLDDS752FLDDS202FLSE01"]]
30	30	|(% 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>>||anchor="H4.1.5LTC2"]]
31	31
32		-
33		-
34	34	= 3. UART Upgrade Guide =
35	35
36	36	== 3.1 Hardware Connection ==
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59	59	Connection for RS485-BL base mother board
60	60
61	61
62		-For UART Update, need:
	60	+(% style="color:#4472c4" %) **For UART Update, need:**
63	63
64	64	* Connect USB-TTL TXD <~-~-> Device UART_RX
65	65	* Connect USB-TTL RXD <~-~-> Device UART_TX
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85	85	)))
86	86
87	87	(((
88		-(% style="color:blue" %)**Step 4: **(%%)Set The device into **(% style="color:#037691" %)ISP Mode**(%%). Then Press the **(% style="color:#037691" %)Reset Button**(%%), In the Flash tool, click next and the tool will detect the board type.
	86	+(% style="color:blue" %)**Step 4: **(%%)Set The device into (% style="color:#037691" %)**ISP Mode**(%%). Then Press the (% style="color:#037691" %)**Reset Button**(%%), In the Flash tool, click next and the tool will detect the board type.
89	89
90	90
91	91	(% style="color:red" %)**Note:**  (%%)ISP Mode can be a switch or a button, depends on the product. The device only need to be in ISP mode when press the reset button for UART Upgrade. So if the device is of a button type ISP mode, user can release the ISP button after press the reset button.
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123	123	)))
124	124
125	125
126		-
127	127	== 3.3 Trouble shooting ==
128	128
129	129	=== 3.3.1 General Check List ===
130	130
	128	+
131	131	1. Double check if follow up exactly the steps as manual.
132	132	1. Check if hardware works fine:
133	133	1*. check if AT command works, in both TX/RX
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136	136	1. If you use Windows10 system. Please change the flash loader to run in Windows7 compatibility mode.
137	137	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.
138	138
	137	+
	138	+
	139	+
139	139	== 3.4 Flash Loader ~-~- Unable to Load data from this file ==
140	140
141	141	[[image:image-20220526174137-8.png]]