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...	...	@@ -994,7 +994,7 @@
994	994
995	995	(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
996	996
997		-[[image:image-20220610174917-9.png]]
	997	+[[image:image-20220610174836-8.png]]
998	998
999	999
1000	1000	(% style="color:#037691" %)**Downlink Command: 0x06**
...	...	@@ -1010,40 +1010,47 @@
1010	1010
1011	1011	= 4.  FAQ =
1012	1012
1013		-== 4.1  What is the frequency plan for LDDS75? ==
	1013	+== 4.1  How to change the LoRa Frequency Bands/Region ==
1014	1014
1015		-LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:
1016		-
1017		-
1018		-
1019		-== 4.2  How to change the LoRa Frequency Bands/Region ==
1020		-
1021	1021	You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1022	1022	When downloading the images, choose the required image file for download. ​
1023	1023
1024	1024
	1019	+= 5.  Trouble Shooting =
1025	1025
1026		-== 4.3  Can I use LDDS75 in condensation environment? ==
	1021	+== 5.1  AT Commands input doesn’t work ==
1027	1027
1028		-LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1029	1029
	1024	+(((
	1025	+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.
	1026	+)))
1030	1030
1031	1031
1032		-= 5.  Trouble Shooting =
	1029	+== 5.2  Significant error between the output distant value of LiDAR and actual distance ==
1033	1033
1034		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1035	1035
	1032	+(((
	1033	+(% 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.)
	1034	+)))
1036	1036
	1036	+(((
	1037	+Troubleshooting: Please avoid use of this product under such circumstance in practice.
	1038	+)))
1037	1037
1038		-== 5.2  AT Command input doesn't work ==
	1040	+(((
	1041	+
	1042	+)))
1039	1039
1040		-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.
	1044	+(((
	1045	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1046	+)))
1041	1041
1042	1042	(((
1043		-
	1049	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1044	1044	)))
1045	1045
1046	1046
	1053	+
1047	1047	= 6.  Order Info =
1048	1048
1049	1049