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Last modified by Mengting Qiu on 2025/06/17 09:18
From version 53.1
edited by Mengting Qiu
on 2025/01/22 14:14
Change comment: There is no comment for this version
To version 55.1
edited by Mengting Qiu
on 2025/01/22 15:14
Change comment: There is no comment for this version

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129 129  == 4.1 OTA_Tool supports two upgrade methods for -LB products. ==
130 130  
131 131  
132 -* For OTA_Tool, you can choose to use the OTA upgrade method, refer to the above upgrade steps in this user manual.
132 +(% style="color:red" %)**Note: The premise of using OTA_Tool is that all your devices have bootloaders.**
133 133  
134 +(% style="color:red" %)**1. **(%%)Only devices with bootloader can perform OTA upgrades(OTA upgrade method).
135 +
136 +(% style="color:red" %)**2.**(%%) This is because the boot loader's address is (% style="color:blue" %)**0x08000000**(%%), the general functional firmware's address is (% style="color:blue" %)**0x0800D000**(%%), and burning the firmware through OTA_Tool will only write content to the address (% style="color:blue" %)**0x0800D000**(%%). So whether you use the OTA_Tool's OTA upgrade method or the UART upgrade method, you can only use it to download firmware without a bootloader, otherwise you will incorrectly place the bootloader at address (% style="color:blue" %)**0x08000000**(%%).
137 +
138 +* For OTA_Tool, you can choose to use the (% style="color:blue" %)**OTA upgrade method**(%%), refer to the above upgrade steps in this user manual.
139 +
134 134  [[image:image-20250122104151-4.png||height="318" width="673"]]
135 135  
136 136  * Of course, if you have a USB-TTL adapter, you can also choose to use the [[UART upgrade method>>https://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H3.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]] via OTA_Tool.