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edited by Xiaoling
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Summary

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Title
... ... @@ -1,1 +1,1 @@
1 -LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
1 +LDDS75 - LoRaWAN Distance Detection Sensor User Manual
Content
... ... @@ -1,97 +1,54 @@
1 1  (% style="text-align:center" %)
2 -[[image:1655254599445-662.png]]
2 +[[image:1654846127817-788.png]]
3 3  
4 +**Contents:**
4 4  
5 5  
6 6  
7 -**Table of Contents:**
8 8  
9 9  
10 10  
11 11  
12 12  
13 -
14 -
15 -
16 16  = 1.  Introduction =
17 17  
18 -== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
15 +== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
19 19  
20 20  (((
21 21  
22 22  
23 23  (((
24 -(((
25 -(((
26 -The Dragino LDDS20 is a (% style="color:#4472c4" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:#4472c4" %)**none-contact method **(%%)to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server
27 -)))
21 +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.
28 28  
29 -(((
30 -
31 -)))
32 32  
33 -(((
34 -The LDDS20 sensor is installed directly below the container to detect the height of the liquid level. User doesn’t need to open a hole on the container to be tested. The (% style="color:#4472c4" %)**none-contact measurement makes the measurement safety, easier and possible for some strict situation**. 
35 -)))
24 +It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
36 36  
37 -(((
38 -
39 -)))
40 40  
41 -(((
42 -LDDS20 uses ultrasonic sensing technology for distance measurement. LDDS20 is of high accuracy to measure various liquid such as: (% style="color:#4472c4" %)**toxic substances**(%%), (% style="color:#4472c4" %)**strong acids**(%%), (% style="color:#4472c4" %)**strong alkalis**(%%) and (% style="color:#4472c4" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
43 -)))
27 +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.
44 44  
45 -(((
46 -
47 -)))
48 48  
49 -(((
50 -The LoRa wireless technology used in LDDS20 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.
51 -)))
30 +LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
52 52  
53 -(((
54 -
55 -)))
56 56  
57 -(((
58 -LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
59 -)))
33 +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.
60 60  
61 -(((
62 -
63 -)))
64 64  
65 -(((
66 -Each LDDS20 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 +(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors
67 67  )))
68 -
69 -(((
70 -
71 71  )))
72 -)))
73 73  
74 -(((
75 -(((
76 -(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 -)))
78 -)))
79 -)))
80 -)))
81 81  
41 +[[image:1654847051249-359.png]]
82 82  
83 -[[image:1655255122126-327.png]]
84 84  
85 85  
86 -
87 87  == ​1.2  Features ==
88 88  
89 89  * LoRaWAN 1.0.3 Class A
90 90  * Ultra low power consumption
91 -* Liquid Level Measurement by Ultrasonic technology
92 -* Measure through container, No need to contact Liquid.
93 -* Valid level range 20mm - 2000mm
94 -* Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
49 +* Distance Detection by Ultrasonic technology
50 +* Flat object range 280mm - 7500mm
51 +* Accuracy: ±(1cm+S*0.3%) (S: Distance)
95 95  * Cable Length : 25cm
96 96  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
97 97  * AT Commands to change parameters
... ... @@ -98,10 +98,9 @@
98 98  * Uplink on periodically
99 99  * Downlink to change configure
100 100  * IP66 Waterproof Enclosure
101 -* 8500mAh Battery for long term use
58 +* 4000mAh or 8500mAh Battery for long term use
102 102  
103 103  
104 -
105 105  == 1.3  Specification ==
106 106  
107 107  === 1.3.1  Rated environmental conditions ===
... ... @@ -108,11 +108,9 @@
108 108  
109 109  [[image:image-20220610154839-1.png]]
110 110  
111 -(((
112 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
67 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
113 113  
114 -**~ 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)**
115 -)))
69 +**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)**
116 116  
117 117  
118 118  
... ... @@ -125,10 +125,7 @@
125 125  [[image:1654852253176-749.png]]
126 126  
127 127  
128 -
129 -(((
130 130  **(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.**
131 -)))
132 132  
133 133  
134 134  [[image:1654852175653-550.png]](% style="display:none" %) ** **
... ... @@ -147,6 +147,7 @@
147 147  * Sewer
148 148  * Bottom water level monitoring
149 149  
101 +
150 150  == 1.6  Pin mapping and power on ==
151 151  
152 152  
... ... @@ -183,8 +183,6 @@
183 183  )))
184 184  
185 185  (((
186 -
187 -
188 188  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
189 189  )))
190 190  
... ... @@ -195,19 +195,11 @@
195 195  [[image:image-20220607170145-1.jpeg]]
196 196  
197 197  
198 -(((
199 199  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
200 -)))
201 201  
202 -(((
203 203  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
204 -)))
205 205  
206 -(((
207 -
208 -
209 209  **Add APP EUI in the application**
210 -)))
211 211  
212 212  [[image:image-20220610161353-4.png]]
213 213  
... ... @@ -250,15 +250,11 @@
250 250  == 2.3  ​Uplink Payload ==
251 251  
252 252  (((
253 -(((
254 254  LDDS75 will uplink payload via LoRaWAN with below payload format: 
255 -)))
256 256  
257 -(((
258 258  Uplink payload includes in total 4 bytes.
259 259  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
260 260  )))
261 -)))
262 262  
263 263  (((
264 264  
... ... @@ -269,12 +269,12 @@
269 269  **Size (bytes)**
270 270  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
271 271  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
272 -[[Distance>>||anchor="H2.3.2A0Distance"]]
210 +[[Distance>>||anchor="H2.3.3A0Distance"]]
273 273  
274 274  (unit: mm)
275 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
276 -[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
277 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
213 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
214 +[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
215 +)))|[[Sensor Flag>>path:#Sensor_Flag]]
278 278  
279 279  [[image:1654850511545-399.png]]
280 280  
... ... @@ -293,21 +293,18 @@
293 293  
294 294  === 2.3.2  Distance ===
295 295  
296 -(((
297 297  Get the distance. Flat object range 280mm - 7500mm.
298 -)))
299 299  
300 -(((
301 301  For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
302 -)))
303 303  
304 304  
305 305  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
306 306  * 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.
307 307  
242 +
308 308  === 2.3.3  Interrupt Pin ===
309 309  
310 -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.
245 +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.
311 311  
312 312  **Example:**
313 313  
... ... @@ -333,18 +333,14 @@
333 333  
334 334  === 2.3.5  Sensor Flag ===
335 335  
336 -(((
337 337  0x01: Detect Ultrasonic Sensor
338 -)))
339 339  
340 -(((
341 341  0x00: No Ultrasonic Sensor
342 -)))
343 343  
344 344  
276 +===
277 +(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
345 345  
346 -=== 2.3.6  Decode payload in The Things Network ===
347 -
348 348  While using TTN network, you can add the payload format to decode the payload.
349 349  
350 350  
... ... @@ -352,9 +352,7 @@
352 352  
353 353  The payload decoder function for TTN V3 is here:
354 354  
355 -(((
356 356  LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
357 -)))
358 358  
359 359  
360 360  
... ... @@ -880,20 +880,14 @@
880 880  * Solid ON for 5 seconds once device successful Join the network.
881 881  * Blink once when device transmit a packet.
882 882  
812 +
883 883  == 2.8  ​Firmware Change Log ==
884 884  
885 885  
886 -(((
887 887  **Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
888 -)))
889 889  
890 -(((
891 -
892 -)))
893 893  
894 -(((
895 895  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
896 -)))
897 897  
898 898  
899 899  
... ... @@ -902,13 +902,11 @@
902 902  
903 903  [[image:image-20220610172003-1.png]]
904 904  
905 -
906 906  [[image:image-20220610172003-2.png]]
907 907  
908 908  
831 +== 2.10  Battery Analysis ==
909 909  
910 -== 2.10  Battery Analysis ==
911 -
912 912  === 2.10.1  Battery Type ===
913 913  
914 914  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.
... ... @@ -917,7 +917,7 @@
917 917  The battery related documents as below:
918 918  
919 919  * (((
920 -[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
841 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
921 921  )))
922 922  * (((
923 923  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
... ... @@ -933,7 +933,7 @@
933 933  === 2.10.2  Replace the battery ===
934 934  
935 935  (((
936 -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.
857 +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.
937 937  )))
938 938  
939 939  (((
... ... @@ -941,12 +941,12 @@
941 941  )))
942 942  
943 943  (((
944 -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)
865 +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)
945 945  )))
946 946  
947 947  
948 948  
949 -= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
870 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
950 950  
951 951  (((
952 952  (((
... ... @@ -956,7 +956,7 @@
956 956  
957 957  * (((
958 958  (((
959 -AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
880 +AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
960 960  )))
961 961  )))
962 962  * (((
... ... @@ -1037,9 +1037,7 @@
1037 1037  [[image:image-20220610172924-5.png]]
1038 1038  
1039 1039  
1040 -(((
1041 1041  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:
1042 -)))
1043 1043  
1044 1044  
1045 1045   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -1055,6 +1055,8 @@
1055 1055  [[image:image-20220610173409-7.png]]
1056 1056  
1057 1057  
977 +
978 +
1058 1058  (((
1059 1059  (% style="color:#037691" %)**Downlink Command: 0x01**
1060 1060  )))
... ... @@ -1063,104 +1063,232 @@
1063 1063  (((
1064 1064  Format: Command Code (0x01) followed by 3 bytes time value.
1065 1065  
1066 -(((
1067 1067  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1068 -)))
1069 1069  
1070 1070  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1071 1071  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1072 1072  )))
1073 -)))
1074 1074  
1075 1075  
994 +
995 +)))
1076 1076  
1077 -
1078 -
1079 1079  == 3.3  Set Interrupt Mode ==
1080 1080  
1081 1081  Feature, Set Interrupt mode for GPIO_EXIT.
1082 1082  
1001 +
1083 1083  (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1084 1084  
1085 -[[image:image-20220610174917-9.png]]
1004 +[[image:image-20220610105907-1.png]]
1086 1086  
1087 1087  
1088 -(% style="color:#037691" %)**Downlink Command: 0x06**
1007 +**Downlink Command: 0x06**
1089 1089  
1090 1090  Format: Command Code (0x06) followed by 3 bytes.
1091 1091  
1092 -(((
1093 1093  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1094 -)))
1095 1095  
1096 1096  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1097 1097  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1098 1098  
1099 -= 4.  FAQ =
1100 1100  
1101 -== 4.1  What is the frequency plan for LDDS75? ==
1102 1102  
1103 -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"]]
1018 += 5.  Battery & How to replace =
1104 1104  
1020 +== 5.1  Battery Type ==
1105 1105  
1022 +(((
1023 +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.
1024 +)))
1106 1106  
1107 -== 4.2  How to change the LoRa Frequency Bands/Region ==
1026 +(((
1027 +The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
1028 +)))
1108 1108  
1109 -You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1110 -When downloading the images, choose the required image file for download. ​
1030 +[[image:1654593587246-335.png]]
1111 1111  
1112 1112  
1033 +Minimum Working Voltage for the LLDS12:
1113 1113  
1114 -== 4.3  Can I use LDDS75 in condensation environment? ==
1035 +LLDS12:  2.45v ~~ 3.6v
1115 1115  
1116 -LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1117 1117  
1118 1118  
1039 +== 5.2  Replace Battery ==
1119 1119  
1120 -= 5.  Trouble Shooting =
1041 +(((
1042 +Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
1043 +)))
1121 1121  
1122 -== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1045 +(((
1046 +And make sure the positive and negative pins match.
1047 +)))
1123 1123  
1124 -It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1125 1125  
1126 1126  
1127 -== 5.2  AT Command input doesn't work ==
1051 +== 5.3  Power Consumption Analyze ==
1128 1128  
1053 +(((
1054 +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.
1055 +)))
1056 +
1057 +(((
1058 +Instruction to use as below:
1059 +)))
1060 +
1061 +
1062 +**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
1063 +
1064 +[[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/]]
1065 +
1066 +
1067 +**Step 2**: Open it and choose
1068 +
1069 +* Product Model
1070 +* Uplink Interval
1071 +* Working Mode
1072 +
1073 +And the Life expectation in difference case will be shown on the right.
1074 +
1075 +[[image:1654593605679-189.png]]
1076 +
1077 +
1078 +The battery related documents as below:
1079 +
1080 +* (((
1081 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
1082 +)))
1083 +* (((
1084 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1085 +)))
1086 +* (((
1087 +[[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]]
1088 +)))
1089 +
1090 +[[image:image-20220607172042-11.png]]
1091 +
1092 +
1093 +
1094 +=== 5.3.1  ​Battery Note ===
1095 +
1096 +(((
1097 +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.
1098 +)))
1099 +
1100 +
1101 +
1102 +=== ​5.3.2  Replace the battery ===
1103 +
1104 +(((
1105 +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.
1106 +)))
1107 +
1108 +(((
1109 +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)
1110 +)))
1111 +
1112 +
1113 +
1114 += 6.  Use AT Command =
1115 +
1116 +== 6.1  Access AT Commands ==
1117 +
1118 +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.
1119 +
1120 +[[image:1654593668970-604.png]]
1121 +
1122 +**Connection:**
1123 +
1124 +(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1125 +
1126 +(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1127 +
1128 +(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1129 +
1130 +
1131 +(((
1132 +(((
1133 +In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
1134 +)))
1135 +
1136 +(((
1137 +LLDS12 will output system info once power on as below:
1138 +)))
1139 +)))
1140 +
1141 +
1142 + [[image:1654593712276-618.png]]
1143 +
1144 +Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1145 +
1146 +
1147 += 7.  FAQ =
1148 +
1149 +== 7.1  How to change the LoRa Frequency Bands/Region ==
1150 +
1151 +You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1152 +When downloading the images, choose the required image file for download. ​
1153 +
1154 +
1155 += 8.  Trouble Shooting =
1156 +
1157 +== 8.1  AT Commands input doesn’t work ==
1158 +
1159 +
1160 +(((
1129 1129  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.
1162 +)))
1130 1130  
1164 +
1165 +== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
1166 +
1167 +
1131 1131  (((
1169 +(% 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.)
1170 +)))
1171 +
1172 +(((
1173 +Troubleshooting: Please avoid use of this product under such circumstance in practice.
1174 +)))
1175 +
1176 +(((
1132 1132  
1133 1133  )))
1134 1134  
1180 +(((
1181 +(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
1182 +)))
1135 1135  
1136 -= 6.  Order Info =
1184 +(((
1185 +Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1186 +)))
1137 1137  
1138 1138  
1139 -Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1140 1140  
1190 += 9.  Order Info =
1141 1141  
1142 -(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1143 1143  
1144 -* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1145 -* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1146 -* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1147 -* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1148 -* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1149 -* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1150 -* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1151 -* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1193 +Part Number: (% style="color:blue" %)**LLDS12-XX**
1152 1152  
1153 -(% style="color:blue" %)**YY**(%%): Battery Option
1154 1154  
1155 -* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1156 -* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1196 +(% style="color:blue" %)**XX**(%%): The default frequency band
1157 1157  
1158 -= 7. ​ Packing Info =
1198 +* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
1199 +* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1200 +* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1201 +* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1202 +* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1203 +* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1204 +* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1205 +* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1159 1159  
1207 += 10. ​ Packing Info =
1160 1160  
1209 +
1161 1161  **Package Includes**:
1162 1162  
1163 -* LDDS75 LoRaWAN Distance Detection Sensor x 1
1212 +* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
1164 1164  
1165 1165  **Dimension and weight**:
1166 1166  
... ... @@ -1169,7 +1169,7 @@
1169 1169  * Package Size / pcs : cm
1170 1170  * Weight / pcs : g
1171 1171  
1172 -= 8.  ​Support =
1221 += 11.  ​Support =
1173 1173  
1174 1174  * 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.
1175 1175  * 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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