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769		-1. ​Using the AT Commands
770		-11. ​Access AT Commands
	769	+= 3. ​Using the AT Commands =
771	771
	771	+== 3.1 Access AT Commands ==
	772	+
772	772	LSE01 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LSE01 for using AT command, as below.
773	773
774		-[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
	775	+[[image:1654501986557-872.png]]
775	775
776	776
777	777	Or if you have below board, use below connection:
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908	908	When downloading the images, choose the required image file for download. ​
909	909
910	910
	912	+How to set up LSE01 to work in 8 channel mode By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.
911	911
912		-How to set up LSE01 to work in 8 channel mode
913	913
914		-By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.
915		-
916		-
917	917	You can configure the end node to work in 8 channel mode by using the AT+CHE command. The 500kHz channels are always included for OTAA.
918	918
919	919
920		-
921	921	For example, in **US915** band, the frequency table is as below. By default, the end node will use all channels (0~~71) for OTAA Join process. After the OTAA Join, the end node will use these all channels (0~~71) to send uplink packets.
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923	923	[[image:image-20220606154726-3.png]]
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934	934	* 905.3 - SF7BW125 to SF10BW125
935	935	* 904.6 - SF8BW500
936	936
	934	+
937	937	Because the end node is now hopping in 72 frequency, it makes it difficult for the devices to Join the TTN network and uplink data. To solve this issue, you can access the device via the AT commands and run:
938	938
	937	+(% class="box infomessage" %)
	938	+(((
939	939	**AT+CHE=2**
	940	+)))
940	940
	942	+(% class="box infomessage" %)
	943	+(((
941	941	**ATZ**
	945	+)))
942	942
943	943	to set the end node to work in 8 channel mode. The device will work in Channel 8-15 & 64-71 for OTAA, and channel 8-15 for Uplink.
944	944
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951	951
952	952	= 5. Trouble Shooting =
953	953
954		-
955	955	== 5.1 ​Why I can’t join TTN in US915 / AU915 bands? ==
956	956
957	957	It is due to channel mapping. Please see the [[Eight Channel Mode>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]] section above for details.
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1039	1039	* 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.
1040	1040	* 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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