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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-20220610105907-1.png]]
998	998
999	999
1000	1000	(% style="color:#037691" %)**Downlink Command: 0x06**
...	...	@@ -1007,43 +1007,84 @@
1007	1007	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1008	1008
1009	1009
1010		-= 4.  FAQ =
1011	1011
1012		-== 4.1  What is the frequency plan for LDDS75? ==
1013	1013
1014		-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"]]
	1012	+= 6.  Use AT Command =
1015	1015
	1014	+== 6.1  Access AT Commands ==
1016	1016
	1016	+LLDS12 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LLDS12 for using AT command, as below.
1017	1017
1018		-== 4.2  How to change the LoRa Frequency Bands/Region ==
	1018	+[[image:1654593668970-604.png]]
1019	1019
1020		-You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1021		-When downloading the images, choose the required image file for download. ​
	1020	+**Connection:**
1022	1022
	1022	+(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1023	1023
	1024	+(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1024	1024
1025		-== 4.3  Can I use LDDS75 in condensation environment? ==
	1026	+(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1026	1026
1027		-LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1028	1028
	1029	+(((
	1030	+(((
	1031	+In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
	1032	+)))
1029	1029
	1034	+(((
	1035	+LLDS12 will output system info once power on as below:
	1036	+)))
	1037	+)))
1030	1030
1031		-= 5.  Trouble Shooting =
1032	1032
1033		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
	1040	+ [[image:1654593712276-618.png]]
1034	1034
1035		-It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
	1042	+Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1036	1036
1037	1037
1038		-== 5.2  AT Command input doesn't work ==
	1045	+= 4.  FAQ =
1039	1039
	1047	+== 4.1  How to change the LoRa Frequency Bands/Region ==
	1048	+
	1049	+You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
	1050	+When downloading the images, choose the required image file for download. ​
	1051	+
	1052	+
	1053	+= 5.  Trouble Shooting =
	1054	+
	1055	+== 5.1  AT Commands input doesn’t work ==
	1056	+
	1057	+
	1058	+(((
1040	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.
	1060	+)))
1041	1041
	1062	+
	1063	+== 5.2  Significant error between the output distant value of LiDAR and actual distance ==
	1064	+
	1065	+
1042	1042	(((
	1067	+(% 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.)
	1068	+)))
	1069	+
	1070	+(((
	1071	+Troubleshooting: Please avoid use of this product under such circumstance in practice.
	1072	+)))
	1073	+
	1074	+(((
1043	1043
1044	1044	)))
1045	1045
	1078	+(((
	1079	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1080	+)))
1046	1046
	1082	+(((
	1083	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
	1084	+)))
	1085	+
	1086	+
	1087	+
1047	1047	= 6.  Order Info =
1048	1048
1049	1049

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