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766 766  
767 767  
768 768  
769 -= 3. ​Using the AT Commands =
769 +1. ​Using the AT Commands
770 +11. ​Access AT Commands
770 770  
771 -== 3.1 Access AT Commands ==
772 -
773 773  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.
774 774  
775 -[[image:1654501986557-872.png]]
774 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
776 776  
777 777  
778 778  Or if you have below board, use below connection:
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901 901  
902 902  
903 903  
904 -= ​4. FAQ =
903 +1. ​FAQ
904 +11. ​How to change the LoRa Frequency Bands/Region?
905 905  
906 -== 4.1 ​How to change the LoRa Frequency Bands/Region? ==
907 -
908 908  You can follow the instructions for [[how to upgrade image>>path:#3ygebqi]].
909 909  When downloading the images, choose the required image file for download. ​
910 910  
911 911  
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.
913 913  
911 +How to set up LSE01 to work in 8 channel mode
914 914  
913 +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.
914 +
915 +
915 915  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.
916 916  
917 917  
919 +
918 918  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.
919 919  
920 -[[image:image-20220606154726-3.png]]
921 921  
923 +|CHE|(% colspan="9" %)US915 Uplink Channels(125KHz,4/5,Unit:MHz,CHS=0)
924 +|0|(% colspan="9" %)ENABLE Channel 0-63
925 +|1|902.3|902.5|902.7|902.9|903.1|903.3|903.5|903.7|Channel 0-7
926 +|2|903.9|904.1|904.3|904.5|904.7|904.9|905.1|905.3|Channel 8-15
927 +|3|905.5|905.7|905.9|906.1|906.3|906.5|906.7|906.9|Channel 16-23
928 +|4|907.1|907.3|907.5|907.7|907.9|908.1|908.3|908.5|Channel 24-31
929 +|5|908.7|908.9|909.1|909.3|909.5|909.7|909.9|910.1|Channel 32-39
930 +|6|910.3|910.5|910.7|910.9|911.1|911.3|911.5|911.7|Channel 40-47
931 +|7|911.9|912.1|912.3|912.5|912.7|912.9|913.1|913.3|Channel 48-55
932 +|8|913.5|913.7|913.9|914.1|914.3|914.5|914.7|914.9|Channel 56-63
933 +|(% colspan="10" %)Channels(500KHz,4/5,Unit:MHz,CHS=0)
934 +| |903|904.6|906.2|907.8|909.4|911|912.6|914.2|Channel 64-71
935 +
922 922  When you use the TTN network, the US915 frequency bands use are:
923 923  
924 924  * 903.9 - SF7BW125 to SF10BW125
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931 931  * 905.3 - SF7BW125 to SF10BW125
932 932  * 904.6 - SF8BW500
933 933  
934 -
935 935  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:
936 936  
937 -(% class="box infomessage" %)
938 -(((
939 939  **AT+CHE=2**
940 -)))
941 941  
942 -(% class="box infomessage" %)
943 -(((
944 944  **ATZ**
945 -)))
946 946  
947 947  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.
948 948  
... ... @@ -949,12 +949,25 @@
949 949  
950 950  The **AU915** band is similar. Below are the AU915 Uplink Channels.
951 951  
952 -[[image:image-20220606154825-4.png]]
953 953  
960 +|CHE|(% colspan="9" %)AU915 Uplink Channels(125KHz,4/5,Unit:MHz,CHS=0)
961 +|0|(% colspan="9" %)ENABLE Channel 0-63
962 +|1|915.2|915.4|915.6|915.8|916|916.2|916.4|916.6|Channel 0-7
963 +|2|916.8|917|917.2|917.4|917.6|917.8|918|918.2|Channel 8-15
964 +|3|918.4|918.6|918.8|919|919.2|919.4|919.6|919.8|Channel 16-23
965 +|4|920|920.2|920.4|920.6|920.8|921|921.2|921.4|Channel 24-31
966 +|5|921.6|921.8|922|922.2|922.4|922.6|922.8|923|Channel 32-39
967 +|6|923.2|923.4|923.6|923.8|924|924.2|924.4|924.6|Channel 40-47
968 +|7|924.8|925|925.2|925.4|925.6|925.8|926|926.2|Channel 48-55
969 +|8|926.4|926.6|926.8|927|927.2|927.4|927.6|927.8|Channel 56-63
970 +|(% colspan="10" %)Channels(500KHz,4/5,Unit:MHz,CHS=0)
971 +| |915.9|917.5|919.1|920.7|922.3|923.9|925.5|927.1|Channel 64-71
954 954  
955 955  
974 +
956 956  = 5. Trouble Shooting =
957 957  
977 +
958 958  == 5.1 ​Why I can’t join TTN in US915 / AU915 bands? ==
959 959  
960 960  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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1042 1042  * 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.
1043 1043  * 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]]
1044 1044  
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