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1325	1325	[[image:1654162535040-878.png]]
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1327	1327	**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
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1329	1329	**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
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1331	1331	**Step3: **Open flashloader; choose the correct COM port to update.
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1333	1333	(((
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1335	1335	(% style="color:blue" %) Hold down the PRO button and then momentarily press the RST reset button and the SYS led will change from OFF to ON, While SYS LED is RED ON, it means the RS485-LN is ready to be program.
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	1345	+)))
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1340	1340	[[image:image-20220602175818-12.png]]