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1011		-
1012	1012	= 4.  FAQ =
1013	1013
1014	1014	== 4.1  What is the frequency plan for LDDS75? ==
1015	1015
1016		-LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:  [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]
	1015	+LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:
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...	...	@@ -1032,20 +1032,39 @@
1032	1032
1033	1033	= 5.  Trouble Shooting =
1034	1034
1035		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
	1034	+== 5.1  AT Commands input doesn’t work ==
1036	1036
1037		-It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1038	1038
	1037	+(((
	1038	+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.
	1039	+)))
1039	1039
1040		-== 5.2  AT Command input doesn't work ==
1041	1041
1042		-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.
	1042	+== 5.2  Significant error between the output distant value of LiDAR and actual distance ==
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	1044	+
1044	1044	(((
	1046	+(% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance (such as glass and water, etc.)
	1047	+)))
	1048	+
	1049	+(((
	1050	+Troubleshooting: Please avoid use of this product under such circumstance in practice.
	1051	+)))
	1052	+
	1053	+(((
1045	1045
1046	1046	)))
1047	1047
	1057	+(((
	1058	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1059	+)))
1048	1048
	1061	+(((
	1062	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
	1063	+)))
	1064	+
	1065	+
	1066	+
1049	1049	= 6.  Order Info =
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1051	1051
...	...	@@ -1068,6 +1068,7 @@
1068	1068	* (% style="color:red" %)**4**(%%): 4000mAh battery
1069	1069	* (% style="color:red" %)**8**(%%): 8500mAh battery
1070	1070
	1089	+
1071	1071	= 7. ​ Packing Info =
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...	...	@@ -1082,6 +1082,7 @@
1082	1082	* Package Size / pcs : cm
1083	1083	* Weight / pcs : g
1084	1084
	1104	+
1085	1085	= 8.  ​Support =
1086	1086
1087	1087	* 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.