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21	21	|(% style="width:151px" %)PS-LB|(% style="width:159px" %)SIB|(% style="width:252px" %)Instruction|(% style="width:234px" %)Instruction
22	22
23	23
	24	+
24	24	= 2. UART for AT Commands =
25	25
26	26	== 2.1 Generate software set up for AT Commands via UART ==
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61	61
62	62	= 3. UART for Firmware Upgrade =
63	63
64		-== 3.1 Check Your device already have bootloader ==
	65	+== 3.1 Update firmware ==
65	65
66		-=== 3.1.1 What is Dragino Bootloader? ===
	67	+=== 3.1.0 What is Dragino Bootloader? ===
67	67
68	68
69	69	Dragino Bootloader is a customizer made bootloader which support below features:
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80	80	)))|(% style="width:480px" %)
81	81
82	82
83		-=== 3.1.2 How can i know if my device already have bootloader? ===
84	84
85		-If a device has a bootloader. it will output bootloader info to UART when boot. As below:
	85	+=== 3.1.1 Update a firmware with Dragino bootloader ===
86	86
87		-[[image:image-20230514150410-1.png||height="398" width="815"]]
88	88
89	89
90		-=== 3.1.3 How to upload bootloader to device? ===
91	91
	90	+=== 3.1.2 Update a firmware without bootloader ===
92	92
	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		-
105	105	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:
106	106
107	107	(% style="color:blue" %)**Step1**(%%): Set BOOT Switch to (% style="color:blue" %)**PROG**(%%) mode. PROG mode is for update firmware specially.
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126	126	[[image:image-20221224174341-4.png||height="471" width="374"]]
127	127
128	128
	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	+
129	129