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3	3
4	4	**Contents:**
5	5
6		-{{toc/}}
7	7
8	8
9	9
...	...	@@ -11,7 +11,6 @@
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
...	...	@@ -59,6 +59,8 @@
59	59	* IP66 Waterproof Enclosure
60	60	* 4000mAh or 8500mAh Battery for long term use
61	61
	60	+
	61	+
62	62	== 1.3  Specification ==
63	63
64	64	=== 1.3.1  Rated environmental conditions ===
...	...	@@ -80,7 +80,6 @@
80	80	[[image:1654852253176-749.png]]
81	81
82	82
83		-
84	84	**(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
85	85
86	86
...	...	@@ -101,6 +101,7 @@
101	101	* Bottom water level monitoring
102	102
103	103
	103	+
104	104	== 1.6  Pin mapping and power on ==
105	105
106	106
...	...	@@ -209,12 +209,12 @@
209	209	**Size (bytes)**
210	210	)))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
211	211	|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
212		-[[Distance>>||anchor="H2.3.2A0Distance"]]
	212	+[[Distance>>||anchor="H2.3.3A0Distance"]]
213	213
214	214	(unit: mm)
215		-)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
216		-[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
217		-)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
	215	+)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
	216	+[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
	217	+)))|[[Sensor Flag>>path:#Sensor_Flag]]
218	218
219	219	[[image:1654850511545-399.png]]
220	220
...	...	@@ -245,7 +245,7 @@
245	245
246	246	=== 2.3.3  Interrupt Pin ===
247	247
248		-This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3A0SetInterruptMode"]] for the hardware and software set up.
	248	+This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up.
249	249
250	250	**Example:**
251	251
...	...	@@ -276,9 +276,9 @@
276	276	0x00: No Ultrasonic Sensor
277	277
278	278
	279	+===
	280	+(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
279	279
280		-=== 2.3.6  Decode payload in The Things Network ===
281		-
282	282	While using TTN network, you can add the payload format to decode the payload.
283	283
284	284
...	...	@@ -829,13 +829,11 @@
829	829
830	830	[[image:image-20220610172003-1.png]]
831	831
832		-
833	833	[[image:image-20220610172003-2.png]]
834	834
835	835
	835	+== 2.10  Battery Analysis  ==
836	836
837		-== 2.10  Battery Analysis ==
838		-
839	839	=== 2.10.1  Battery Type ===
840	840
841	841	The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
...	...	@@ -844,7 +844,7 @@
844	844	The battery related documents as below:
845	845
846	846	* (((
847		-[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
	845	+[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
848	848	)))
849	849	* (((
850	850	[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
...	...	@@ -859,31 +859,84 @@
859	859
860	860	=== 2.10.2  Replace the battery ===
861	861
	860	+You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
	861	+
	862	+
	863	+The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
	864	+
	865	+
	866	+
	867	+= 3.  LiDAR ToF Measurement =
	868	+
	869	+== 3.1 Principle of Distance Measurement ==
	870	+
	871	+The LiDAR probe is based on TOF, namely, Time of Flight principle. To be specific, the product emits modulation wave of near infrared ray on a periodic basis, which will be reflected after contacting object. The product obtains the time of flight by measuring round-trip phase difference and then calculates relative range between the product and the detection object, as shown below.
	872	+
	873	+[[image:1654831757579-263.png]]
	874	+
	875	+
	876	+
	877	+== 3.2 Distance Measurement Characteristics ==
	878	+
	879	+With optimization of light path and algorithm, The LiDAR probe has minimized influence from external environment on distance measurement performance. Despite that, the range of distance measurement may still be affected by the environment illumination intensity and the reflectivity of detection object. As shown in below:
	880	+
	881	+[[image:1654831774373-275.png]]
	882	+
	883	+
862	862	(((
863		-You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
	885	+(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
864	864	)))
865	865
866	866	(((
867		-
	889	+(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
868	868	)))
869	869
870	870	(((
871		-The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can't find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
	893	+(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
872	872	)))
873	873
874	874
	897	+(((
	898	+Vertical Coordinates: Represents the radius of light spot for The LiDAR probe at the different distances. The diameter of light spot depends on the FOV of The LiDAR probe (the term of FOV generally refers to the smaller value between the receiving angle and the transmitting angle), which is calculated as follows:
	899	+)))
875	875
876		-= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
877	877
	902	+[[image:1654831797521-720.png]]
	903	+
	904	+
878	878	(((
	906	+In the formula above, d is the diameter of light spot; D is detecting range; β is the value of the receiving angle of The LiDAR probe, 3.6°. Correspondence between the diameter of light spot and detecting range is given in Table below.
	907	+)))
	908	+
	909	+[[image:1654831810009-716.png]]
	910	+
	911	+
879	879	(((
880		-Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
	913	+If the light spot reaches two objects with different distances, as shown in Figure 3, the output distance value will be a value between the actual distance values of the two objects. For a high accuracy requirement in practice, the above situation should be noticed to avoid the measurement error.
881	881	)))
	915	+
	916	+
	917	+
	918	+== 3.3 Notice of usage: ==
	919	+
	920	+Possible invalid /wrong reading for LiDAR ToF tech:
	921	+
	922	+* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
	923	+* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
	924	+* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
	925	+* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
	926	+
	927	+= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
	928	+
	929	+(((
	930	+(((
	931	+Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
882	882	)))
	933	+)))
883	883
884	884	* (((
885	885	(((
886		-AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
	937	+AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
887	887	)))
888	888	)))
889	889	* (((
...	...	@@ -898,7 +898,7 @@
898	898	)))
899	899
900	900	(((
901		-There are two kinds of commands to configure LDDS75, they are:
	952	+There are two kinds of commands to configure LLDS12, they are:
902	902	)))
903	903	)))
904	904
...	...	@@ -939,154 +939,351 @@
939	939
940	940	* (((
941	941	(((
942		-(% style="color:#4f81bd" %)** Commands special design for LDDS75**
	993	+(% style="color:#4f81bd" %)** Commands special design for LLDS12**
943	943	)))
944	944	)))
945	945
946	946	(((
947	947	(((
948		-These commands only valid for LDDS75, as below:
	999	+These commands only valid for LLDS12, as below:
949	949	)))
950	950	)))
951	951
952	952
953	953
954		-== 3.1  Access AT Commands ==
	1005	+== 4.1  Set Transmit Interval Time ==
955	955
956		-LDDS75 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LDDS75 for using AT command, as below.
	1007	+Feature: Change LoRaWAN End Node Transmit Interval.
957	957
958		-[[image:image-20220610172924-4.png||height="483" width="988"]]
	1009	+(% style="color:#037691" %)**AT Command: AT+TDC**
959	959
	1011	+[[image:image-20220607171554-8.png]]
960	960
961		-Or if you have below board, use below connection:
962	962
	1014	+(((
	1015	+(% style="color:#037691" %)**Downlink Command: 0x01**
	1016	+)))
963	963
964		-[[image:image-20220610172924-5.png]]
	1018	+(((
	1019	+Format: Command Code (0x01) followed by 3 bytes time value.
	1020	+)))
965	965
	1022	+(((
	1023	+If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
	1024	+)))
966	966
967		-In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
	1026	+* (((
	1027	+Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	1028	+)))
	1029	+* (((
	1030	+Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	1031	+)))
968	968
	1033	+== 4.2  Set Interrupt Mode ==
969	969
970		- [[image:image-20220610172924-6.png||height="601" width="860"]]
	1035	+Feature, Set Interrupt mode for GPIO_EXIT.
971	971
	1037	+(% style="color:#037691" %)**AT Command: AT+INTMOD**
972	972
	1039	+[[image:image-20220610105806-2.png]]
973	973
974		-== 3.2  Set Transmit Interval Time ==
975	975
976		-Feature: Change LoRaWAN End Node Transmit Interval.
	1042	+(((
	1043	+(% style="color:#037691" %)**Downlink Command: 0x06**
	1044	+)))
977	977
978		-(% style="color:#037691" %)**AT Command: AT+TDC**
	1046	+(((
	1047	+Format: Command Code (0x06) followed by 3 bytes.
	1048	+)))
979	979
980		-[[image:image-20220610173409-7.png]]
	1050	+(((
	1051	+This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
	1052	+)))
981	981
	1054	+* (((
	1055	+Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
	1056	+)))
	1057	+* (((
	1058	+Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
	1059	+)))
982	982
	1061	+== 4.3  Get Firmware Version Info ==
	1062	+
	1063	+Feature: use downlink to get firmware version.
	1064	+
	1065	+(% style="color:#037691" %)**Downlink Command: 0x26**
	1066	+
	1067	+[[image:image-20220607171917-10.png]]
	1068	+
	1069	+* Reply to the confirmation package: 26 01
	1070	+* Reply to non-confirmed packet: 26 00
	1071	+
	1072	+Device will send an uplink after got this downlink command. With below payload:
	1073	+
	1074	+Configures info payload:
	1075	+
	1076	+(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
	1077	+|=(((
	1078	+**Size(bytes)**
	1079	+)))|=**1**|=**1**|=**1**|=**1**|=**1**|=**5**|=**1**
	1080	+|**Value**|Software Type|(((
	1081	+Frequency
	1082	+
	1083	+Band
	1084	+)))|Sub-band|(((
	1085	+Firmware
	1086	+
	1087	+Version
	1088	+)))|Sensor Type|Reserve|(((
	1089	+[[Message Type>>||anchor="H2.3.7A0MessageType"]]
	1090	+Always 0x02
	1091	+)))
	1092	+
	1093	+**Software Type**: Always 0x03 for LLDS12
	1094	+
	1095	+
	1096	+**Frequency Band**:
	1097	+
	1098	+*0x01: EU868
	1099	+
	1100	+*0x02: US915
	1101	+
	1102	+*0x03: IN865
	1103	+
	1104	+*0x04: AU915
	1105	+
	1106	+*0x05: KZ865
	1107	+
	1108	+*0x06: RU864
	1109	+
	1110	+*0x07: AS923
	1111	+
	1112	+*0x08: AS923-1
	1113	+
	1114	+*0x09: AS923-2
	1115	+
	1116	+*0xa0: AS923-3
	1117	+
	1118	+
	1119	+**Sub-Band**: value 0x00 ~~ 0x08
	1120	+
	1121	+
	1122	+**Firmware Version**: 0x0100, Means: v1.0.0 version
	1123	+
	1124	+
	1125	+**Sensor Type**:
	1126	+
	1127	+0x01: LSE01
	1128	+
	1129	+0x02: LDDS75
	1130	+
	1131	+0x03: LDDS20
	1132	+
	1133	+0x04: LLMS01
	1134	+
	1135	+0x05: LSPH01
	1136	+
	1137	+0x06: LSNPK01
	1138	+
	1139	+0x07: LLDS12
	1140	+
	1141	+
	1142	+
	1143	+= 5.  Battery & How to replace =
	1144	+
	1145	+== 5.1  Battery Type ==
	1146	+
983	983	(((
984		-(% style="color:#037691" %)**Downlink Command: 0x01**
	1148	+LLDS12 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.
985	985	)))
986	986
987	987	(((
	1152	+The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
	1153	+)))
	1154	+
	1155	+[[image:1654593587246-335.png]]
	1156	+
	1157	+
	1158	+Minimum Working Voltage for the LLDS12:
	1159	+
	1160	+LLDS12:  2.45v ~~ 3.6v
	1161	+
	1162	+
	1163	+
	1164	+== 5.2  Replace Battery ==
	1165	+
988	988	(((
989		-Format: Command Code (0x01) followed by 3 bytes time value.
	1167	+Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
	1168	+)))
990	990
991		-If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
	1170	+(((
	1171	+And make sure the positive and negative pins match.
	1172	+)))
992	992
993		-* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
994		-* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	1174	+
	1175	+
	1176	+== 5.3  Power Consumption Analyze ==
	1177	+
	1178	+(((
	1179	+Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
995	995	)))
996	996
	1182	+(((
	1183	+Instruction to use as below:
	1184	+)))
997	997
998		-
	1186	+
	1187	+**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
	1188	+
	1189	+[[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
	1190	+
	1191	+
	1192	+**Step 2**: Open it and choose
	1193	+
	1194	+* Product Model
	1195	+* Uplink Interval
	1196	+* Working Mode
	1197	+
	1198	+And the Life expectation in difference case will be shown on the right.
	1199	+
	1200	+[[image:1654593605679-189.png]]
	1201	+
	1202	+
	1203	+The battery related documents as below:
	1204	+
	1205	+* (((
	1206	+[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
999	999	)))
	1208	+* (((
	1209	+[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
	1210	+)))
	1211	+* (((
	1212	+[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
	1213	+)))
1000	1000
1001		-== 3.3  Set Interrupt Mode ==
	1215	+[[image:image-20220607172042-11.png]]
1002	1002
1003		-Feature, Set Interrupt mode for GPIO_EXIT.
1004	1004
1005		-(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1006	1006
1007		-[[image:image-20220610174917-9.png]]
	1219	+=== 5.3.1  ​Battery Note ===
1008	1008
	1221	+(((
	1222	+The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
	1223	+)))
1009	1009
1010		-(% style="color:#037691" %)**Downlink Command: 0x06**
1011	1011
1012		-Format: Command Code (0x06) followed by 3 bytes.
1013	1013
1014		-This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
	1227	+=== ​5.3.2  Replace the battery ===
1015	1015
1016		-* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1017		-* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
	1229	+(((
	1230	+You can change the battery in the LLDS12.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
	1231	+)))
1018	1018
	1233	+(((
	1234	+The default battery pack of LLDS12 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
	1235	+)))
1019	1019
1020	1020
1021	1021
1022		-= 4.  FAQ =
	1239	+= 6.  Use AT Command =
1023	1023
1024		-== 4.1  What is the frequency plan for LDDS75? ==
	1241	+== 6.1  Access AT Commands ==
1025	1025
1026		-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"]]
	1243	+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.
1027	1027
	1245	+[[image:1654593668970-604.png]]
1028	1028
	1247	+**Connection:**
1029	1029
1030		-== 4.2  How to change the LoRa Frequency Bands/Region ==
	1249	+(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1031	1031
1032		-You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1033		-When downloading the images, choose the required image file for download. ​
	1251	+(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1034	1034
	1253	+(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1035	1035
1036	1036
1037		-== 4.3  Can I use LDDS75 in condensation environment? ==
	1256	+(((
	1257	+(((
	1258	+In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
	1259	+)))
1038	1038
1039		-LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
	1261	+(((
	1262	+LLDS12 will output system info once power on as below:
	1263	+)))
	1264	+)))
1040	1040
1041	1041
	1267	+ [[image:1654593712276-618.png]]
1042	1042
1043		-= 5.  Trouble Shooting =
	1269	+Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1044	1044
1045		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1046	1046
1047		-It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
	1272	+= 7.  FAQ =
1048	1048
	1274	+== 7.1  How to change the LoRa Frequency Bands/Region ==
1049	1049
1050		-== 5.2  AT Command input doesn't work ==
	1276	+You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
	1277	+When downloading the images, choose the required image file for download. ​
1051	1051
	1279	+
	1280	+= 8.  Trouble Shooting =
	1281	+
	1282	+== 8.1  AT Commands input doesn’t work ==
	1283	+
	1284	+
	1285	+(((
1052	1052	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.
	1287	+)))
1053	1053
	1289	+
	1290	+== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
	1291	+
	1292	+
1054	1054	(((
1055		-
	1294	+(% 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.)
1056	1056	)))
1057	1057
	1297	+(((
	1298	+Troubleshooting: Please avoid use of this product under such circumstance in practice.
	1299	+)))
1058	1058
1059		-= 6.  Order Info =
	1301	+(((
	1302	+
	1303	+)))
1060	1060
	1305	+(((
	1306	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1307	+)))
1061	1061
1062		-Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
	1309	+(((
	1310	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
	1311	+)))
1063	1063
1064	1064
1065		-(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1066	1066
1067		-* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1068		-* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1069		-* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1070		-* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1071		-* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1072		-* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1073		-* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1074		-* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
	1315	+= 9.  Order Info =
1075	1075
1076		-(% style="color:blue" %)**YY**(%%): Battery Option
1077	1077
1078		-* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1079		-* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
	1318	+Part Number: (% style="color:blue" %)**LLDS12-XX**
1080	1080
1081	1081
	1321	+(% style="color:blue" %)**XX**(%%): The default frequency band
1082	1082
	1323	+* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
	1324	+* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
	1325	+* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
	1326	+* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
	1327	+* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
	1328	+* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
	1329	+* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
	1330	+* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1083	1083
1084		-= 7. ​ Packing Info =
	1332	+= 10. ​ Packing Info =
1085	1085
1086	1086
1087	1087	**Package Includes**:
1088	1088
1089		-* LDDS75 LoRaWAN Distance Detection Sensor x 1
	1337	+* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
1090	1090
1091	1091	**Dimension and weight**:
1092	1092
...	...	@@ -1095,10 +1095,7 @@
1095	1095	* Package Size / pcs : cm
1096	1096	* Weight / pcs : g
1097	1097
	1346	+= 11.  ​Support =
1098	1098
1099		-
1100		-
1101		-= 8.  ​Support =
1102		-
1103	1103	* 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.
1104	1104	* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].

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