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3	3
4	4	**Contents:**
5	5
6		-{{toc/}}
7	7
8	8
9	9
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11	11
12	12
13	13
14		-
15	15	= 1.  Introduction =
16	16
17	17	== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
...	...	@@ -35,7 +35,7 @@
35	35	Each LDDS75 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.
36	36
37	37
38		-(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
	36	+(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors
39	39	)))
40	40	)))
41	41
...	...	@@ -272,9 +272,9 @@
272	272	0x00: No Ultrasonic Sensor
273	273
274	274
	273	+===
	274	+(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
275	275
276		-=== 2.3.6  Decode payload in The Things Network ===
277		-
278	278	While using TTN network, you can add the payload format to decode the payload.
279	279
280	280
...	...	@@ -996,7 +996,7 @@
996	996
997	997	(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
998	998
999		-[[image:image-20220610174917-9.png]]
	997	+[[image:image-20220610105907-1.png]]
1000	1000
1001	1001
1002	1002	(% style="color:#037691" %)**Downlink Command: 0x06**
...	...	@@ -1009,66 +1009,109 @@
1009	1009	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1010	1010
1011	1011
1012		-= 4.  FAQ =
1013	1013
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"]]
1017	1017
	1013	+= 6.  Use AT Command =
1018	1018
	1015	+== 6.1  Access AT Commands ==
1019	1019
1020		-== 4.2  How to change the LoRa Frequency Bands/Region ==
	1017	+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.
1021	1021
1022		-You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1023		-When downloading the images, choose the required image file for download. ​
	1019	+[[image:1654593668970-604.png]]
1024	1024
	1021	+**Connection:**
1025	1025
	1023	+(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1026	1026
1027		-== 4.3  Can I use LDDS75 in condensation environment? ==
	1025	+(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1028	1028
1029		-LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
	1027	+(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1030	1030
1031	1031
	1030	+(((
	1031	+(((
	1032	+In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
	1033	+)))
1032	1032
1033		-= 5.  Trouble Shooting =
	1035	+(((
	1036	+LLDS12 will output system info once power on as below:
	1037	+)))
	1038	+)))
1034	1034
1035		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1036	1036
1037		-It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
	1041	+ [[image:1654593712276-618.png]]
1038	1038
	1043	+Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1039	1039
1040		-== 5.2  AT Command input doesn't work ==
1041	1041
	1046	+= 7.  FAQ =
	1047	+
	1048	+== 7.1  How to change the LoRa Frequency Bands/Region ==
	1049	+
	1050	+You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
	1051	+When downloading the images, choose the required image file for download. ​
	1052	+
	1053	+
	1054	+= 8.  Trouble Shooting =
	1055	+
	1056	+== 8.1  AT Commands input doesn’t work ==
	1057	+
	1058	+
	1059	+(((
1042	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.
	1061	+)))
1043	1043
	1063	+
	1064	+== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
	1065	+
	1066	+
1044	1044	(((
	1068	+(% 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.)
	1069	+)))
	1070	+
	1071	+(((
	1072	+Troubleshooting: Please avoid use of this product under such circumstance in practice.
	1073	+)))
	1074	+
	1075	+(((
1045	1045
1046	1046	)))
1047	1047
	1079	+(((
	1080	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1081	+)))
1048	1048
	1083	+(((
	1084	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
	1085	+)))
	1086	+
	1087	+
	1088	+
1049	1049	= 6.  Order Info =
1050	1050
1051	1051
1052		-Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
	1092	+Part Number: (% style="color:blue" %)**LDDS75-XX-YY**
1053	1053
1054	1054
1055		-(% style="color:blue" %)**XX**(%%)**: **The default frequency band
	1095	+(% style="color:blue" %)**XX**(%%): The default frequency band
1056	1056
1057		-* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1058		-* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1059		-* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1060		-* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1061		-* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1062		-* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1063		-* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1064		-* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
	1097	+* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
	1098	+* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
	1099	+* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
	1100	+* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
	1101	+* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
	1102	+* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
	1103	+* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
	1104	+* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1065	1065
1066	1066	(% style="color:blue" %)**YY**(%%): Battery Option
1067	1067
1068		-* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1069		-* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
	1108	+* **(% style="color:red" %)4**(%%): 4000mAh battery
	1109	+* **(% style="color:red" %)8**(%%): 8500mAh battery
1070	1070
1071	1071
	1112	+
1072	1072	= 7. ​ Packing Info =
1073	1073
1074	1074
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1084	1084	* Weight / pcs : g
1085	1085
1086	1086
	1128	+
1087	1087	= 8.  ​Support =
1088	1088
1089	1089	* 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.

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