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129	129	~1. Download **[[OTA Tool>>https://www.dropbox.com/sh/bqepfzvusv6ig8e/AACKB4J9pdY1I7s5kcKfCUGHa?dl=0]]**
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131	131	2. Use below schedule to update:
	132	+(% style="color:red" %)**FLASH**(%%)
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133	133	[[image:image-20230520100249-1.png||height="483" width="805"]]
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135	135	[[image:image-20230520100405-3.png||height="295" width="804"]]
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138	138	[[image:image-20230520100541-5.png||height="535" width="799"]]
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155	155	~1. UART upgrade via Dragino Sensor Manager Utility again to the correct version. The password should use the AT PIN for the wrong firmware.  (This method is not 100% work, depends which wrong firmware you have upgraded)
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157		-2. Use **TremoProgrammer **to update firmware.
	157	+2. Use **TremoProgrammer **to update firmware. [[Insturction>>||anchor="H4.3HowtouseTremoProgrammertoupdatefirmwareifthereisbootloaderinthedevice3F"]]
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159	159	3. Use **[[OTA update>>http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]**, this is base on Bootloader so it will work. Make you choose the correct frequency band (base on the firmware version in the sensor or use EU868 which is the default setting.)
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