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From version < 4.8 >
edited by Xiaoling
on 2022/06/06 15:24
To version < 4.10 >
edited by Xiaoling
on 2022/06/06 15:26
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983 983  
984 984  = 5. Trouble Shooting =
985 985  
986 -1. ​Why I can’t join TTN in US915 / AU915 bands?
987 987  
987 +== 5.1 ​Why I can’t join TTN in US915 / AU915 bands? ==
988 +
988 988  It is due to channel mapping. Please see the [[Eight Channel Mode>>path:#206ipza]] section above for details.
989 989  
990 990  
992 +== 5.2 AT Command input doesn’t work ==
991 991  
992 -1.
993 -11. AT Command input doesn’t work
994 -
995 995  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 **ENTER** while sending out the command. Some serial tool doesn’t send **ENTER** while press the send key, user need to add ENTER in their string.
996 996  
997 997  
997 +== 5.3 Device rejoin in at the second uplink packet ==
998 998  
999 -
1000 -1.
1001 -11. Device rejoin in at the second uplink packet.
1002 -
1003 1003  **Issue describe as below:**
1004 1004  
1005 1005  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]]
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