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Last modified by Xiaoling on 2025/04/27 16:45
From version 150.11
edited by Xiaoling
on 2022/06/11 08:40
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To version 154.3
edited by Xiaoling
on 2022/06/15 09:04
Change comment: There is no comment for this version

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Title
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1 -LDDS75 - LoRaWAN Distance Detection Sensor User Manual
1 +LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
Content
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1 1  (% style="text-align:center" %)
2 -[[image:1654846127817-788.png]]
2 +[[image:1655254599445-662.png]]
3 3  
4 -**Contents:**
5 5  
6 -{{toc/}}
7 7  
8 8  
7 +**Table of Contents:**
9 9  
10 10  
11 11  
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12 12  
13 13  
14 14  
14 +
15 +
15 15  = 1.  Introduction =
16 16  
17 -== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
18 +== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
18 18  
19 19  (((
20 20  
21 21  
22 22  (((
23 -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.
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 +)))
24 24  
29 +(((
30 +
31 +)))
25 25  
26 -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 +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 +)))
27 27  
37 +(((
38 +
39 +)))
28 28  
29 -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 +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 +)))
30 30  
45 +(((
46 +
47 +)))
31 31  
32 -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 +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 +)))
33 33  
53 +(((
54 +
55 +)))
34 34  
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.
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 +)))
36 36  
61 +(((
62 +
63 +)))
37 37  
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.
67 +)))
68 +
69 +(((
70 +
71 +)))
72 +)))
73 +
74 +(((
75 +(((
38 38  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
39 39  )))
40 40  )))
79 +)))
80 +)))
41 41  
42 42  
43 43  [[image:1654847051249-359.png]]
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59 59  * IP66 Waterproof Enclosure
60 60  * 4000mAh or 8500mAh Battery for long term use
61 61  
62 -
63 -
64 64  == 1.3  Specification ==
65 65  
66 66  === 1.3.1  Rated environmental conditions ===
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67 67  
68 68  [[image:image-20220610154839-1.png]]
69 69  
70 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
108 +(((
109 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
71 71  
72 -**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)**
111 +**~ 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)**
112 +)))
73 73  
74 74  
75 75  
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83 83  
84 84  
85 85  
126 +(((
86 86  **(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.**
128 +)))
87 87  
88 88  
89 89  [[image:1654852175653-550.png]](% style="display:none" %) ** **
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102 102  * Sewer
103 103  * Bottom water level monitoring
104 104  
105 -
106 -
107 -
108 108  == 1.6  Pin mapping and power on ==
109 109  
110 110  
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141 141  )))
142 142  
143 143  (((
183 +
184 +
144 144  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
145 145  )))
146 146  
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151 151  [[image:image-20220607170145-1.jpeg]]
152 152  
153 153  
195 +(((
154 154  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
197 +)))
155 155  
199 +(((
156 156  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
201 +)))
157 157  
203 +(((
204 +
205 +
158 158  **Add APP EUI in the application**
207 +)))
159 159  
160 160  [[image:image-20220610161353-4.png]]
161 161  
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198 198  == 2.3  ​Uplink Payload ==
199 199  
200 200  (((
250 +(((
201 201  LDDS75 will uplink payload via LoRaWAN with below payload format: 
252 +)))
202 202  
254 +(((
203 203  Uplink payload includes in total 4 bytes.
204 204  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
205 205  )))
258 +)))
206 206  
207 207  (((
208 208  
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213 213  **Size (bytes)**
214 214  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
215 215  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
216 -[[Distance>>||anchor="H2.3.3A0Distance"]]
269 +[[Distance>>||anchor="H2.3.2A0Distance"]]
217 217  
218 218  (unit: mm)
219 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
220 -[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
221 -)))|[[Sensor Flag>>path:#Sensor_Flag]]
272 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
273 +[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
274 +)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
222 222  
223 223  [[image:1654850511545-399.png]]
224 224  
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237 237  
238 238  === 2.3.2  Distance ===
239 239  
293 +(((
240 240  Get the distance. Flat object range 280mm - 7500mm.
295 +)))
241 241  
297 +(((
242 242  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.**
299 +)))
243 243  
244 244  
245 245  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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247 247  
248 248  === 2.3.3  Interrupt Pin ===
249 249  
250 -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.
307 +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.
251 251  
252 252  **Example:**
253 253  
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273 273  
274 274  === 2.3.5  Sensor Flag ===
275 275  
333 +(((
276 276  0x01: Detect Ultrasonic Sensor
335 +)))
277 277  
337 +(((
278 278  0x00: No Ultrasonic Sensor
339 +)))
279 279  
280 280  
281 281  
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288 288  
289 289  The payload decoder function for TTN V3 is here:
290 290  
352 +(((
291 291  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/]]
354 +)))
292 292  
293 293  
294 294  
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817 817  == 2.8  ​Firmware Change Log ==
818 818  
819 819  
883 +(((
820 820  **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/]]
885 +)))
821 821  
887 +(((
888 +
889 +)))
822 822  
891 +(((
823 823  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
893 +)))
824 824  
825 825  
826 826  
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829 829  
830 830  [[image:image-20220610172003-1.png]]
831 831  
902 +
832 832  [[image:image-20220610172003-2.png]]
833 833  
834 834  
906 +
835 835  == 2.10  Battery Analysis ==
836 836  
837 837  === 2.10.1  Battery Type ===
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842 842  The battery related documents as below:
843 843  
844 844  * (((
845 -[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
917 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
846 846  )))
847 847  * (((
848 848  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
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858 858  === 2.10.2  Replace the battery ===
859 859  
860 860  (((
861 -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.
933 +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.
862 862  )))
863 863  
864 864  (((
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866 866  )))
867 867  
868 868  (((
869 -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)
941 +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)
870 870  )))
871 871  
872 872  
873 873  
874 -= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
946 += 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
875 875  
876 876  (((
877 877  (((
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881 881  
882 882  * (((
883 883  (((
884 -AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
956 +AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
885 885  )))
886 886  )))
887 887  * (((
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962 962  [[image:image-20220610172924-5.png]]
963 963  
964 964  
1037 +(((
965 965  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:
1039 +)))
966 966  
967 967  
968 968   [[image:image-20220610172924-6.png||height="601" width="860"]]
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986 986  (((
987 987  Format: Command Code (0x01) followed by 3 bytes time value.
988 988  
1063 +(((
989 989  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1065 +)))
990 990  
991 991  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
992 992  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
993 993  )))
1070 +)))
994 994  
995 995  
996 -
997 -)))
998 998  
1074 +
1075 +
999 999  == 3.3  Set Interrupt Mode ==
1000 1000  
1001 1001  Feature, Set Interrupt mode for GPIO_EXIT.
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1009 1009  
1010 1010  Format: Command Code (0x06) followed by 3 bytes.
1011 1011  
1089 +(((
1012 1012  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1091 +)))
1013 1013  
1014 1014  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1015 1015  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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