Changes for page LMDS200 -- LoRaWAN Microwave Radar Distance Sensor User Manual

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...	...	@@ -3,7 +3,6 @@
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 ==
...	...	@@ -20,51 +20,24 @@
20	20
21	21
22	22	(((
23		-(((
24	24	The Dragino LDDS75 is a (% style="color:#4472c4" %)** LoRaWAN Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:#4472c4" %)** ultrasonic sensing** (%%)technology for distance measurement, and (% style="color:#4472c4" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
25		-)))
26	26
27		-(((
28		-
29		-)))
30	30
31		-(((
32	32	It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
33		-)))
34	34
35		-(((
36		-
37		-)))
38	38
39		-(((
40	40	The LoRa wireless technology used in LDDS75 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
41		-)))
42	42
43		-(((
44		-
45		-)))
46	46
47		-(((
48	48	LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
49		-)))
50	50
51		-(((
52		-
53		-)))
54	54
55		-(((
56	56	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.
57		-)))
58	58
59		-(((
60		-
61		-)))
62	62
63		-(((
64		-(% 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
65	65	)))
66	66	)))
67		-)))
68	68
69	69
70	70	[[image:1654847051249-359.png]]
...	...	@@ -94,12 +94,12 @@
94	94
95	95	[[image:image-20220610154839-1.png]]
96	96
97		-(((
98		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
99		-)))
	68	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
100	100
	70	+**b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
101	101
102	102
	73	+
103	103	=== 1.3.2  Effective measurement range Reference beam pattern ===
104	104
105	105	**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
...	...	@@ -109,7 +109,6 @@
109	109	[[image:1654852253176-749.png]]
110	110
111	111
112		-
113	113	**(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.**
114	114
115	115
...	...	@@ -129,6 +129,8 @@
129	129	* Sewer
130	130	* Bottom water level monitoring
131	131
	102	+
	103	+
132	132	== 1.6  Pin mapping and power on ==
133	133
134	134
...	...	@@ -237,12 +237,12 @@
237	237	**Size (bytes)**
238	238	)))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
239	239	|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
240		-[[Distance>>||anchor="H2.3.2A0Distance"]]
	212	+[[Distance>>||anchor="H2.3.3A0Distance"]]
241	241
242	242	(unit: mm)
243		-)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
244		-[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
245		-)))|[[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]]
246	246
247	247	[[image:1654850511545-399.png]]
248	248
...	...	@@ -269,9 +269,11 @@
269	269	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
270	270	* If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. Since v1.1.4, all value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid.
271	271
	244	+
	245	+
272	272	=== 2.3.3  Interrupt Pin ===
273	273
274		-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.
275	275
276	276	**Example:**
277	277
...	...	@@ -302,9 +302,9 @@
302	302	0x00: No Ultrasonic Sensor
303	303
304	304
	279	+===
	280	+(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
305	305
306		-=== 2.3.6  Decode payload in The Things Network ===
307		-
308	308	While using TTN network, you can add the payload format to decode the payload.
309	309
310	310
...	...	@@ -838,6 +838,8 @@
838	838	* Solid ON for 5 seconds once device successful Join the network.
839	839	* Blink once when device transmit a packet.
840	840
	815	+
	816	+
841	841	== 2.8  ​Firmware Change Log ==
842	842
843	843
...	...	@@ -853,13 +853,11 @@
853	853
854	854	[[image:image-20220610172003-1.png]]
855	855
856		-
857	857	[[image:image-20220610172003-2.png]]
858	858
859	859
	835	+== 2.10  Battery Analysis  ==
860	860
861		-== 2.10  Battery Analysis ==
862		-
863	863	=== 2.10.1  Battery Type ===
864	864
865	865	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.
...	...	@@ -868,7 +868,7 @@
868	868	The battery related documents as below:
869	869
870	870	* (((
871		-[[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]],
872	872	)))
873	873	* (((
874	874	[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
...	...	@@ -883,31 +883,84 @@
883	883
884	884	=== 2.10.2  Replace the battery ===
885	885
	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	+
886	886	(((
887		-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.
888	888	)))
889	889
890	890	(((
891		-
	889	+(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
892	892	)))
893	893
894	894	(((
895		-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.
896	896	)))
897	897
898	898
	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	+)))
899	899
900		-= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
901	901
	902	+[[image:1654831797521-720.png]]
	903	+
	904	+
902	902	(((
	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	+
903	903	(((
904		-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.
905	905	)))
	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.
906	906	)))
	933	+)))
907	907
908	908	* (((
909	909	(((
910		-AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
	937	+AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
911	911	)))
912	912	)))
913	913	* (((
...	...	@@ -922,7 +922,7 @@
922	922	)))
923	923
924	924	(((
925		-There are two kinds of commands to configure LDDS75, they are:
	952	+There are two kinds of commands to configure LLDS12, they are:
926	926	)))
927	927	)))
928	928
...	...	@@ -963,150 +963,351 @@
963	963
964	964	* (((
965	965	(((
966		-(% style="color:#4f81bd" %)** Commands special design for LDDS75**
	993	+(% style="color:#4f81bd" %)** Commands special design for LLDS12**
967	967	)))
968	968	)))
969	969
970	970	(((
971	971	(((
972		-These commands only valid for LDDS75, as below:
	999	+These commands only valid for LLDS12, as below:
973	973	)))
974	974	)))
975	975
976	976
977	977
978		-== 3.1  Access AT Commands ==
	1005	+== 4.1  Set Transmit Interval Time ==
979	979
980		-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.
981	981
982		-[[image:image-20220610172924-4.png||height="483" width="988"]]
	1009	+(% style="color:#037691" %)**AT Command: AT+TDC**
983	983
	1011	+[[image:image-20220607171554-8.png]]
984	984
985		-Or if you have below board, use below connection:
986	986
	1014	+(((
	1015	+(% style="color:#037691" %)**Downlink Command: 0x01**
	1016	+)))
987	987
988		-[[image:image-20220610172924-5.png]]
	1018	+(((
	1019	+Format: Command Code (0x01) followed by 3 bytes time value.
	1020	+)))
989	989
	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	+)))
990	990
991		-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	+)))
992	992
	1033	+== 4.2  Set Interrupt Mode ==
993	993
994		- [[image:image-20220610172924-6.png||height="601" width="860"]]
	1035	+Feature, Set Interrupt mode for GPIO_EXIT.
995	995
	1037	+(% style="color:#037691" %)**AT Command: AT+INTMOD**
996	996
	1039	+[[image:image-20220610105806-2.png]]
997	997
998		-== 3.2  Set Transmit Interval Time ==
999	999
1000		-Feature: Change LoRaWAN End Node Transmit Interval.
	1042	+(((
	1043	+(% style="color:#037691" %)**Downlink Command: 0x06**
	1044	+)))
1001	1001
1002		-(% style="color:#037691" %)**AT Command: AT+TDC**
	1046	+(((
	1047	+Format: Command Code (0x06) followed by 3 bytes.
	1048	+)))
1003	1003
1004		-[[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	+)))
1005	1005
	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	+)))
1006	1006
	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	+
1007	1007	(((
1008		-(% 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.
1009	1009	)))
1010	1010
1011	1011	(((
	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	+
1012	1012	(((
1013		-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	+)))
1014	1014
1015		-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	+)))
1016	1016
1017		-* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1018		-* 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.
1019	1019	)))
1020	1020
	1182	+(((
	1183	+Instruction to use as below:
	1184	+)))
1021	1021
1022		-
	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]],
1023	1023	)))
	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	+)))
1024	1024
1025		-== 3.3  Set Interrupt Mode ==
	1215	+[[image:image-20220607172042-11.png]]
1026	1026
1027		-Feature, Set Interrupt mode for GPIO_EXIT.
1028	1028
1029		-(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1030	1030
1031		-[[image:image-20220610174917-9.png]]
	1219	+=== 5.3.1  ​Battery Note ===
1032	1032
	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	+)))
1033	1033
1034		-(% style="color:#037691" %)**Downlink Command: 0x06**
1035	1035
1036		-Format: Command Code (0x06) followed by 3 bytes.
1037	1037
1038		-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 ===
1039	1039
1040		-* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1041		-* 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	+)))
1042	1042
	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	+)))
1043	1043
1044		-= 4.  FAQ =
1045	1045
1046		-== 4.1  What is the frequency plan for LDDS75? ==
1047	1047
1048		-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"]]
	1239	+= 6.  Use AT Command =
1049	1049
	1241	+== 6.1  Access AT Commands ==
1050	1050
	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.
1051	1051
1052		-== 4.2  How to change the LoRa Frequency Bands/Region ==
	1245	+[[image:1654593668970-604.png]]
1053	1053
1054		-You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1055		-When downloading the images, choose the required image file for download. ​
	1247	+**Connection:**
1056	1056
	1249	+(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1057	1057
	1251	+(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1058	1058
1059		-== 4.3  Can I use LDDS75 in condensation environment? ==
	1253	+(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1060	1060
1061		-LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1062	1062
	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	+)))
1063	1063
	1261	+(((
	1262	+LLDS12 will output system info once power on as below:
	1263	+)))
	1264	+)))
1064	1064
1065		-= 5.  Trouble Shooting =
1066	1066
1067		-== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
	1267	+ [[image:1654593712276-618.png]]
1068	1068
1069		-It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
	1269	+Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1070	1070
1071	1071
1072		-== 5.2  AT Command input doesn't work ==
	1272	+= 7.  FAQ =
1073	1073
	1274	+== 7.1  How to change the LoRa Frequency Bands/Region ==
	1275	+
	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. ​
	1278	+
	1279	+
	1280	+= 8.  Trouble Shooting =
	1281	+
	1282	+== 8.1  AT Commands input doesn’t work ==
	1283	+
	1284	+
	1285	+(((
1074	1074	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	+)))
1075	1075
	1289	+
	1290	+== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
	1291	+
	1292	+
1076	1076	(((
	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.)
	1295	+)))
	1296	+
	1297	+(((
	1298	+Troubleshooting: Please avoid use of this product under such circumstance in practice.
	1299	+)))
	1300	+
	1301	+(((
1077	1077
1078	1078	)))
1079	1079
	1305	+(((
	1306	+(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
	1307	+)))
1080	1080
1081		-= 6.  Order Info =
	1309	+(((
	1310	+Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
	1311	+)))
1082	1082
1083	1083
1084		-Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1085	1085
	1315	+= 9.  Order Info =
1086	1086
1087		-(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1088	1088
1089		-* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1090		-* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1091		-* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1092		-* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1093		-* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1094		-* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1095		-* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1096		-* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
	1318	+Part Number: (% style="color:blue" %)**LLDS12-XX**
1097	1097
1098		-(% style="color:blue" %)**YY**(%%): Battery Option
1099	1099
1100		-* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1101		-* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
	1321	+(% style="color:blue" %)**XX**(%%): The default frequency band
1102	1102
	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
1103	1103
1104		-= 7. ​ Packing Info =
	1332	+= 10. ​ Packing Info =
1105	1105
1106	1106
1107	1107	**Package Includes**:
1108	1108
1109		-* LDDS75 LoRaWAN Distance Detection Sensor x 1
	1337	+* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
1110	1110
1111	1111	**Dimension and weight**:
1112	1112
...	...	@@ -1115,8 +1115,7 @@
1115	1115	* Package Size / pcs : cm
1116	1116	* Weight / pcs : g
1117	1117
	1346	+= 11.  ​Support =
1118	1118
1119		-= 8.  ​Support =
1120		-
1121	1121	* 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.
1122	1122	* 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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