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989	989	(% style="background-color:#dcdcdc" %)**AT+CHE**(%%)  : Get or Set eight channels mode, Only for US915, AU915, CN470
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992	992	= ​4. FAQ =
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994	994	== 4.1 ​How to change the LoRa Frequency Bands/Region? ==
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996	996	(((
997	997	You can follow the instructions for [[how to upgrade image>>||anchor="H2.10200BFirmwareChangeLog"]].
998	998	When downloading the images, choose the required image file for download. ​
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1061	1061	[[image:image-20220606154825-4.png]]
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1064	1064	== 4.2 ​Can I calibrate LSE01 to different soil types? ==
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1066	1066	LSE01 is calibrated for saline-alkali soil and loamy soil. If users want to use it for other soil, they can calibrate the value in the IoT platform base on the value measured by saline-alkali soil and loamy soil. The formula can be found at [[this link>>https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/&file=Calibrate_to_other_Soil_20220605.pdf]].
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1069	1069	= 5. Trouble Shooting =
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1071	1071	== 5.1 ​Why I can't join TTN in US915 / AU915 bands? ==
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1073	1073	It is due to channel mapping. Please see the [[Eight Channel Mode>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.19EightChannelMode"]] section above for details.
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1076	1076	== 5.2 AT Command input doesn't work ==
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1078	1078	(((
1079	1079	In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
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1083	1083	== 5.3 Device rejoin in at the second uplink packet ==
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1085	1085	(% style="color:#4f81bd" %)**Issue describe as below:**
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1087	1087	[[image:1654500909990-784.png]]
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1101	1101	[[image:1654500929571-736.png||height="458" width="832"]]
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1104	1104	= 6. ​Order Info =
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1167	1167	= 8. Support =
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1169	1169	* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1170	1170	* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]]
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