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27	27	|(% style="width:290px" %)LHT65N|(% style="width:172px" %)LHT65N|(% style="width:116px" %) |(% style="width:248px" %)
28	28	|(% style="width:290px" %) |(% style="width:172px" %) |(% style="width:116px" %) |(% style="width:248px" %)
29	29
	30	+
30	30	= 2. UART for AT Commands =
31	31
32	32	== 2.1 Generate software set up for AT Commands via UART ==
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63	63
64	64	== 2.3 UART Connection for SN50v3 base mother board ==
65	65
66		-[[image:image-20230515102801-1.png]]
67	67
68	68
69	69	= 3. UART for Firmware Upgrade =
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75	75
76	76	Dragino Bootloader is a customizer made bootloader which support below features:
77	77
78		-* OTA Update via LoRa
79		-* OTA Batch update configure via LoRa
	78	+* OTA Update via LoRa or BLE
	79	+* OTA Batch update configure via LoRa or BLE
80	80
81		-All Dragino End Devices base on LoRa ST v4 supports Dragino Bootloader.
	81	+(% border="1" cellspacing="5" style="width:912.222px" %)
	82	+|(% style="background-color:#d9e2f3; color:#0070c0; width:429px" %)**Model supports LoRa Bootloader**|(% style="background-color:#d9e2f3; color:#0070c0; width:480px" %)**Model with BLE Bootloader**
	83	+|(% style="width:429px" %)(((
	84	+PS-LB, SDI12-LB, PS-LB-NA, SN50v3-LB,
82	82
	86	+D2x-LB, S31x-LB, SDI12-LB
83	83
	88	+LA66, LA66 USB, LA66 Shield
	89	+)))|(% style="width:480px" %)(((
	90	+
	91	+)))
	92	+
	93	+
84	84	=== 3.1.2 How can i know if my device already have bootloader? ===
85	85
86	86	If a device has a bootloader. it will output bootloader info to UART when boot. As below:
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90	90
91	91	=== 3.1.3 How to upload bootloader to device? ===
92	92
93		-If your is LoRa ST v4 base hardware and doesn't have bootloader. You can upload a bootloader to it.
94	94
95		-**[[Downlink Link for OTA bootloader>>https://www.dropbox.com/sh/g4cp2lm85ovr8hu/AADX-4aEE-7SuKQAKTWrgKHIa?dl=0]].**
96	96
97		-
98		-**Update a firmware via TremoProgrammer:**
99		-
100		-LoRaSTv4 Base hardware support UART update firmware. the UART connection is the same as AT Command connection, with the need for two extra action. See below for the steps:
101		-
102		- (% style="color:blue" %)**Step1**(%%): Set BOOT Switch to (% style="color:blue" %)**PROG**(%%) mode. PROG mode is for update firmware specially.
103		-
104		- (% style="color:blue" %)**Step2**(%%): Press (% style="color:blue" %)**Reset**(%%) button, the module will then boot into program mode.
105		-
106		- (% style="color:blue" %)**Step3**(%%): Use (% style="color:blue" %)**TremoProgrammer**(%%) to update the firmware to LoRaST v4.
107		-
108		- (% style="color:blue" %)**Step4**(%%): Set BOOT Switch to (% style="color:blue" %)**FLASH**(%%) position. Press Reset button again and module will run the new software.
109		-
110		-
111		-Below is the method for how to update via (% style="color:blue" %)**TremoProgrammer:**
112		-
113		-1.  **TremoProgrammer** download link:  [[https:~~/~~/www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0>>url:https://www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0]]
114		-
115		-2.  Run** (% style="color:blue" %)TremoProgrammer.(%%)**
116		-
117		-3.  Choose software and set the address to (% style="color:blue" %)**0x08000000**(%%).
118		-
119		-4. Rember to set BOOT Switch to (% style="color:blue" %)**FLASH**(%%) after update finish. And you should be about to see Bootloader info in output after update
120		-
121		-[[image:image-20230515171651-1.png]]
122		-
123		-
124		-
125	125	== 3.2 Update Firmware (Assume the device already have a bootloader) ==
126	126
127	127	=== 3.2.1 Update a firmware via Dragino bootloader ===
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150	150
151	151	2.  Run** (% style="color:blue" %)TremoProgrammer.(%%)**
152	152
153		-3.  Choose software and set the address to (% style="color:blue" %)**0x0800D000**(%%). (% style="color:red" %)VERY IMPORTANT for this address.
	133	+3.  Choose software and set the address to (% style="color:blue" %)**0x0800D000**(%%). (% style="color:red" %)VERY IMPORTANT: USE THIS ADDRESS FOR FIRMWARE WITHOUT BOOTLOADER
154	154
155	155	4. Rember to set BOOT Switch to (% style="color:blue" %)**FLASH**(%%) after update
156	156
157	157	[[image:image-20221224174341-4.png||height="471" width="374"]]
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	139	+
	140	+

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