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144	144	* Hardware: LA66 USB
145	145	[[image:image-20250213172807-1.png]][[image:image-20250213172928-2.png]]
146	146	* Before using LA66 as a firmware burning tool for -LB products, you need to burn OTA_firmware for LA66 first.
	147	+* If you have never downloaded LA66 OTA DongleV1.0 to your LA66, you can directly upgrade the LA66 OTA DongleV1.1 program from your phone using the following method.
	148	+* [[bootlooder>>url:https://wiki.dragino.com/xwiki/bin/download/Main/BLE%20Bluetooth%20Remote%20Configure/WebHome/LoRa_OTA_Bootloader_v1.4.bin?rev=1.1]] and [[OTA_firmware>>url:https://wiki.dragino.com/xwiki/bin/download/Main/BLE%20Bluetooth%20Remote%20Configure/WebHome/LA66%20OTA%20DONGLE%20v1.1.bin?rev=1.1]].
147	147	* The firmware burning method refers to the LA66 upgrade below.[[Click to redirect.>>https://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/#H3.1.3.3LA66upgrade]]
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232	232	**In order to ensure that the LA66 USB works properly, make sure that there is a corresponding bootloader before updating the firmware.**
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235		-**If you don't have a bootloader, you need to use the "Tremo Programmer" software to download it.**
	237	+**If you don't have a bootloader, you need to use the "[[Tremo Programmer>>https://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H3.1.3Howtouploadbootloadertodevice3F]]" software to download it.**
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238	238	② Click "START".