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...	...	@@ -21,7 +21,6 @@
21	21	|(% style="width:151px" %)PS-LB|(% style="width:159px" %)SIB|(% style="width:252px" %)Instruction|(% style="width:234px" %)Instruction
22	22
23	23
24		-
25	25	= 2. UART for AT Commands =
26	26
27	27	== 2.1 Generate software set up for AT Commands via UART ==
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62	62
63	63	= 3. UART for Firmware Upgrade =
64	64
65		-== 3.1 Update firmware ==
	64	+== 3.1 Check Your device already have bootloader ==
66	66
67		-=== 3.1.0 What is Dragino Bootloader? ===
	66	+=== 3.1.1 What is Dragino Bootloader? ===
68	68
69	69
70	70	Dragino Bootloader is a customizer made bootloader which support below features:
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81	81	)))|(% style="width:480px" %)
82	82
83	83
	83	+=== 3.1.2 How can i know if my device already have bootloader? ===
84	84
85		-=== 3.1.1 Update a firmware with Dragino bootloader ===
	85	+If a device has a bootloader. it will output bootloader info to UART when boot. As below:
86	86
	87	+[[image:image-20230514150410-1.png||height="398" width="815"]]
87	87
88	88
	90	+=== 3.1.3 How to upload bootloader to device? ===
89	89
90		-=== 3.1.2 Update a firmware without bootloader ===
91	91
92		-If a firmware's name doesn't have the suffix **_with_bootloader**. It means the firmware is without bootloader and user can use this method to uplink.
93	93
	94	+== 3.2 Update Firmware (Assume the device already have a bootloader) ==
	95	+
	96	+=== 3.2.1 Update a firmware via Dragino bootloader ===
	97	+
	98	+
	99	+
	100	+
	101	+=== 3.2.2 Update a firmware via TremoProgrammer ===
	102	+
	103	+Make sure your device already bootloader while use this update. Other device won't be able to boot ( can be solve by upload a bootloader to the device).
	104	+
94	94	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:
95	95
96	96	(% style="color:blue" %)**Step1**(%%): Set BOOT Switch to (% style="color:blue" %)**PROG**(%%) mode. PROG mode is for update firmware specially.
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115	115	[[image:image-20221224174341-4.png||height="471" width="374"]]
116	116
117	117
118		-== 3.2 UART Connection for SIB mother board for Program. ==
119		-
120		-
121		-Below shows the SIB board UART connection, reset button and BOOT Switch (Program Jumper) position. They can be used for firmware upgrade reference.
122		-
123		-[[image:image-20221224174605-6.png||height="569" width="880"]]
124		-
125	125