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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 150.47
edited by Xiaoling
on 2022/06/11 09:17
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To version 173.1
edited by Xiaoling
on 2022/06/15 10:09
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Summary

Details

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Title
... ... @@ -1,1 +1,1 @@
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  
... ... @@ -12,9 +12,11 @@
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  
... ... @@ -21,7 +21,8 @@
21 21  
22 22  (((
23 23  (((
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 +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
25 25  )))
26 26  
27 27  (((
... ... @@ -29,7 +29,7 @@
29 29  )))
30 30  
31 31  (((
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.
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**. 
33 33  )))
34 34  
35 35  (((
... ... @@ -37,7 +37,7 @@
37 37  )))
38 38  
39 39  (((
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.
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.
41 41  )))
42 42  
43 43  (((
... ... @@ -45,7 +45,7 @@
45 45  )))
46 46  
47 47  (((
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*.
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.
49 49  )))
50 50  
51 51  (((
... ... @@ -53,7 +53,7 @@
53 53  )))
54 54  
55 55  (((
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.
58 +LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
57 57  )))
58 58  
59 59  (((
... ... @@ -61,13 +61,24 @@
61 61  )))
62 62  
63 63  (((
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 +(((
64 64  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
65 65  )))
66 66  )))
67 67  )))
80 +)))
68 68  
69 69  
70 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
71 71  
72 72  
73 73  
... ... @@ -75,9 +75,10 @@
75 75  
76 76  * LoRaWAN 1.0.3 Class A
77 77  * Ultra low power consumption
78 -* Distance Detection by Ultrasonic technology
79 -* Flat object range 280mm - 7500mm
80 -* Accuracy: ±(1cm+S*0.3%) (S: Distance)
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)
81 81  * Cable Length : 25cm
82 82  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
83 83  * AT Commands to change parameters
... ... @@ -84,71 +84,136 @@
84 84  * Uplink on periodically
85 85  * Downlink to change configure
86 86  * IP66 Waterproof Enclosure
87 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
88 88  
89 89  
90 -== 1.3  Specification ==
104 +== 1.3  Suitable Container & Liquid ==
91 91  
92 -=== 1.3.1  Rated environmental conditions ===
106 +* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
107 +* Container shape is regular, and surface is smooth.
108 +* Container Thickness:
109 +** Pure metal material.  2~~8mm, best is 3~~5mm
110 +** Pure non metal material: <10 mm
111 +* Pure liquid without irregular deposition.
93 93  
94 -[[image:image-20220610154839-1.png]]
95 95  
96 -(((
97 -**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)**
98 -)))
114 +== 1.4  Mechanical ==
99 99  
116 +[[image:image-20220615090910-1.png]]
100 100  
101 101  
102 -=== 1.3.2  Effective measurement range Reference beam pattern ===
119 +[[image:image-20220615090910-2.png]]
103 103  
104 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
105 105  
106 106  
123 +== 1.5  Install LDDS20 ==
107 107  
108 -[[image:1654852253176-749.png]]
109 109  
126 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
110 110  
128 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
111 111  
112 -(((
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 -)))
130 +[[image:image-20220615091045-3.png]]
115 115  
116 116  
117 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
118 118  
134 +(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
119 119  
136 +For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
120 120  
121 -== 1.5 ​ Applications ==
138 +[[image:image-20220615092010-11.png]]
122 122  
123 -* Horizontal distance measurement
124 -* Liquid level measurement
125 -* Parking management system
126 -* Object proximity and presence detection
127 -* Intelligent trash can management system
128 -* Robot obstacle avoidance
129 -* Automatic control
130 -* Sewer
131 -* Bottom water level monitoring
132 132  
141 +No polish needed if the container is shine metal surface without paint or non-metal container.
133 133  
143 +[[image:image-20220615092044-12.png]]
134 134  
135 -== 1.6  Pin mapping and power on ==
136 136  
137 137  
138 -[[image:1654847583902-256.png]]
147 +(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
139 139  
149 +Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
140 140  
141 141  
142 -= 2.  Configure LDDS75 to connect to LoRaWAN network =
152 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
143 143  
154 +[[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
155 +
156 +
157 +After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
158 +
159 +
160 +(% style="color:red" %)**LED Status:**
161 +
162 +* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
163 +
164 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
165 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
166 +
167 +LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
168 +
169 +
170 +(% style="color:red" %)**Note 2:**
171 +
172 +(% style="color:red" %)Ultrasonic coupling paste (%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
173 +
174 +
175 +
176 +(% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
177 +
178 +Prepare Eproxy AB glue.
179 +
180 +Put Eproxy AB glue in the sensor and press it hard on the container installation point.
181 +
182 +Reset LDDS20 and see if the BLUE LED is slowly blinking.
183 +
184 +[[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
185 +
186 +
187 +(% style="color:red" %)**Note 1:**
188 +
189 +Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
190 +
191 +
192 +(% style="color:red" %)**Note 2:**
193 +
194 +(% style="color:red" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
195 +
196 +
197 +
198 +== 1.6 ​ Applications ==
199 +
200 +* Smart liquid control solution.
201 +* Smart liquefied gas solution.
202 +
203 +
204 +
205 +== 1.7  Precautions ==
206 +
207 +* At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
208 +* For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
209 +* When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
210 +
211 +
212 +
213 +== 1.8  Pin mapping and power on ==
214 +
215 +
216 +[[image:1655257026882-201.png]]
217 +
218 +
219 +
220 += 2.  Configure LDDS20 to connect to LoRaWAN network =
221 +
222 +
144 144  == 2.1  How it works ==
145 145  
146 146  (((
147 -The LDDS75 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value
226 +The LDDS20 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
148 148  )))
149 149  
150 150  (((
151 -In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS75.
230 +In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0UsingtheATCommands"]]to set the keys in the LDDS20.
152 152  )))
153 153  
154 154  
... ... @@ -160,7 +160,7 @@
160 160  )))
161 161  
162 162  (((
163 -[[image:1654848616367-242.png]]
242 +[[image:1655257698953-697.png]]
164 164  )))
165 165  
166 166  (((
... ... @@ -168,11 +168,13 @@
168 168  )))
169 169  
170 170  (((
171 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
250 +
251 +
252 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
172 172  )))
173 173  
174 174  (((
175 -Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
256 +Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
176 176  )))
177 177  
178 178  [[image:image-20220607170145-1.jpeg]]
... ... @@ -187,6 +187,8 @@
187 187  )))
188 188  
189 189  (((
271 +
272 +
190 190  **Add APP EUI in the application**
191 191  )))
192 192  
... ... @@ -200,6 +200,7 @@
200 200  [[image:image-20220610161353-7.png]]
201 201  
202 202  
286 +
203 203  You can also choose to create the device manually.
204 204  
205 205   [[image:image-20220610161538-8.png]]
... ... @@ -212,16 +212,17 @@
212 212  
213 213  
214 214  
215 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
216 216  
217 217  
218 218  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
219 219  
220 -[[image:image-20220610161724-10.png]]
304 +[[image:image-20220615095102-14.png]]
221 221  
222 222  
307 +
223 223  (((
224 -(% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
309 +(% style="color:blue" %)**Step 3**(%%)**:**  The LDDS20 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
225 225  )))
226 226  
227 227  [[image:1654849068701-275.png]]
... ... @@ -232,12 +232,10 @@
232 232  
233 233  (((
234 234  (((
235 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
236 -)))
320 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
237 237  
238 -(((
239 -Uplink payload includes in total 4 bytes.
240 -Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
322 +Uplink payload includes in total 8 bytes.
323 +Payload for firmware version v1.1.4. . Before v1.1.3, there is only 5 bytes: BAT and Distance(Please check manual v1.2.0 if you have 5 bytes payload).
241 241  )))
242 242  )))
243 243  
... ... @@ -264,7 +264,7 @@
264 264  === 2.3.1  Battery Info ===
265 265  
266 266  
267 -Check the battery voltage for LDDS75.
350 +Check the battery voltage for LDDS20.
268 268  
269 269  Ex1: 0x0B45 = 2885mV
270 270  
... ... @@ -274,17 +274,22 @@
274 274  
275 275  === 2.3.2  Distance ===
276 276  
277 -Get the distance. Flat object range 280mm - 7500mm.
360 +(((
361 +Get the distance. Flat object range 20mm - 2000mm.
362 +)))
278 278  
279 -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.**
364 +(((
365 +For example, if the data you get from the register is __0x06 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541 (D) = 1541 mm.**
366 +)))
280 280  
368 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
369 +* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
281 281  
282 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
283 -* 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.
284 284  
372 +
285 285  === 2.3.3  Interrupt Pin ===
286 286  
287 -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.
375 +This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.2A0SetInterruptMode"]] for the hardware and software set up.
288 288  
289 289  **Example:**
290 290  
... ... @@ -310,9 +310,13 @@
310 310  
311 311  === 2.3.5  Sensor Flag ===
312 312  
401 +(((
313 313  0x01: Detect Ultrasonic Sensor
403 +)))
314 314  
405 +(((
315 315  0x00: No Ultrasonic Sensor
407 +)))
316 316  
317 317  
318 318  
... ... @@ -325,7 +325,9 @@
325 325  
326 326  The payload decoder function for TTN V3 is here:
327 327  
328 -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/]]
420 +(((
421 +LDDS20 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS20/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
422 +)))
329 329  
330 330  
331 331  
... ... @@ -854,10 +854,17 @@
854 854  == 2.8  ​Firmware Change Log ==
855 855  
856 856  
951 +(((
857 857  **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/]]
953 +)))
858 858  
955 +(((
956 +
957 +)))
859 859  
959 +(((
860 860  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
961 +)))
861 861  
862 862  
863 863  
... ... @@ -1001,7 +1001,9 @@
1001 1001  [[image:image-20220610172924-5.png]]
1002 1002  
1003 1003  
1105 +(((
1004 1004  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:
1107 +)))
1005 1005  
1006 1006  
1007 1007   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -1025,16 +1025,19 @@
1025 1025  (((
1026 1026  Format: Command Code (0x01) followed by 3 bytes time value.
1027 1027  
1131 +(((
1028 1028  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1133 +)))
1029 1029  
1030 1030  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1031 1031  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1032 1032  )))
1138 +)))
1033 1033  
1034 1034  
1035 -
1036 -)))
1037 1037  
1142 +
1143 +
1038 1038  == 3.3  Set Interrupt Mode ==
1039 1039  
1040 1040  Feature, Set Interrupt mode for GPIO_EXIT.
... ... @@ -1048,7 +1048,9 @@
1048 1048  
1049 1049  Format: Command Code (0x06) followed by 3 bytes.
1050 1050  
1157 +(((
1051 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.
1159 +)))
1052 1052  
1053 1053  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1054 1054  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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