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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 152.1
edited by Xiaoling
on 2022/06/11 09:39
Change comment: There is no comment for this version
To version 173.2
edited by Xiaoling
on 2022/06/15 10:10
Change comment: There is no comment for this version

Summary

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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
... ... @@ -84,74 +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  
104 +== 1.3  Suitable Container & Liquid ==
90 90  
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.
91 91  
92 -== 1.3  Specification ==
93 93  
94 -=== 1.3.1  Rated environmental conditions ===
114 +== 1.4  Mechanical ==
95 95  
96 -[[image:image-20220610154839-1.png]]
116 +[[image:image-20220615090910-1.png]]
97 97  
98 -(((
99 -**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)**
100 -)))
101 101  
119 +[[image:image-20220615090910-2.png]]
102 102  
103 103  
104 -=== 1.3.2  Effective measurement range Reference beam pattern ===
105 105  
106 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
123 +== 1.5  Install LDDS20 ==
107 107  
108 108  
126 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
109 109  
110 -[[image:1654852253176-749.png]]
128 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
111 111  
130 +[[image:image-20220615091045-3.png]]
112 112  
113 113  
114 -(((
115 -**(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.**
116 -)))
117 117  
134 +(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
118 118  
119 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
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  
138 +[[image:image-20220615092010-11.png]]
121 121  
122 122  
123 -== 1.5 ​ Applications ==
141 +No polish needed if the container is shine metal surface without paint or non-metal container.
124 124  
125 -* Horizontal distance measurement
126 -* Liquid level measurement
127 -* Parking management system
128 -* Object proximity and presence detection
129 -* Intelligent trash can management system
130 -* Robot obstacle avoidance
131 -* Automatic control
132 -* Sewer
133 -* Bottom water level monitoring
143 +[[image:image-20220615092044-12.png]]
134 134  
135 135  
136 136  
147 +(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
137 137  
138 -== 1.6  Pin mapping and power on ==
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.
139 139  
140 140  
141 -[[image:1654847583902-256.png]]
152 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
142 142  
154 +[[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
143 143  
144 144  
145 -= 2.  Configure LDDS75 to connect to LoRaWAN network =
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.
146 146  
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 +
147 147  == 2.1  How it works ==
148 148  
149 149  (((
150 -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.
151 151  )))
152 152  
153 153  (((
154 -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.
155 155  )))
156 156  
157 157  
... ... @@ -163,7 +163,7 @@
163 163  )))
164 164  
165 165  (((
166 -[[image:1654848616367-242.png]]
242 +[[image:1655257698953-697.png]]
167 167  )))
168 168  
169 169  (((
... ... @@ -171,11 +171,13 @@
171 171  )))
172 172  
173 173  (((
174 -(% 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.
175 175  )))
176 176  
177 177  (((
178 -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.
179 179  )))
180 180  
181 181  [[image:image-20220607170145-1.jpeg]]
... ... @@ -190,6 +190,8 @@
190 190  )))
191 191  
192 192  (((
271 +
272 +
193 193  **Add APP EUI in the application**
194 194  )))
195 195  
... ... @@ -203,6 +203,7 @@
203 203  [[image:image-20220610161353-7.png]]
204 204  
205 205  
286 +
206 206  You can also choose to create the device manually.
207 207  
208 208   [[image:image-20220610161538-8.png]]
... ... @@ -215,16 +215,17 @@
215 215  
216 216  
217 217  
218 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
219 219  
220 220  
221 221  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
222 222  
223 -[[image:image-20220610161724-10.png]]
304 +[[image:image-20220615095102-14.png]]
224 224  
225 225  
307 +
226 226  (((
227 -(% 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.
228 228  )))
229 229  
230 230  [[image:1654849068701-275.png]]
... ... @@ -235,12 +235,10 @@
235 235  
236 236  (((
237 237  (((
238 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
239 -)))
320 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
240 240  
241 -(((
242 -Uplink payload includes in total 4 bytes.
243 -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).
244 244  )))
245 245  )))
246 246  
... ... @@ -267,7 +267,7 @@
267 267  === 2.3.1  Battery Info ===
268 268  
269 269  
270 -Check the battery voltage for LDDS75.
350 +Check the battery voltage for LDDS20.
271 271  
272 272  Ex1: 0x0B45 = 2885mV
273 273  
... ... @@ -278,23 +278,21 @@
278 278  === 2.3.2  Distance ===
279 279  
280 280  (((
281 -Get the distance. Flat object range 280mm - 7500mm.
361 +Get the distance. Flat object range 20mm - 2000mm.
282 282  )))
283 283  
284 284  (((
285 -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.**
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.**
286 286  )))
287 287  
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.
288 288  
289 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
290 -* 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.
291 291  
292 292  
293 -
294 -
295 295  === 2.3.3  Interrupt Pin ===
296 296  
297 -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.
298 298  
299 299  **Example:**
300 300  
... ... @@ -340,17 +340,41 @@
340 340  The payload decoder function for TTN V3 is here:
341 341  
342 342  (((
343 -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/]]
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/]]
344 344  )))
345 345  
346 346  
347 347  
348 -== 2.4  Uplink Interval ==
426 +== 2.4  Downlink Payload ==
349 349  
350 -The LDDS75 by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H4.1ChangeUplinkInterval"]]
428 +By default, LDDS20 prints the downlink payload to console port.
351 351  
430 +[[image:image-20220615100930-15.png]]
352 352  
353 353  
433 +**Examples:**
434 +
435 +
436 +* **Set TDC**
437 +
438 +If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
439 +
440 +Payload:    01 00 00 1E    TDC=30S
441 +
442 +Payload:    01 00 00 3C    TDC=60S
443 +
444 +
445 +* **Reset**
446 +
447 +If payload = 0x04FF, it will reset the LDDS20
448 +
449 +
450 +* **CFM**
451 +
452 +Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
453 +
454 +
455 +
354 354  == 2.5  ​Show Data in DataCake IoT Server ==
355 355  
356 356  (((
... ... @@ -867,9 +867,6 @@
867 867  * Solid ON for 5 seconds once device successful Join the network.
868 868  * Blink once when device transmit a packet.
869 869  
870 -
871 -
872 -
873 873  == 2.8  ​Firmware Change Log ==
874 874  
875 875  
... ... @@ -1086,9 +1086,6 @@
1086 1086  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1087 1087  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1088 1088  
1089 -
1090 -
1091 -
1092 1092  = 4.  FAQ =
1093 1093  
1094 1094  == 4.1  What is the frequency plan for LDDS75? ==
... ... @@ -1148,9 +1148,6 @@
1148 1148  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1149 1149  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1150 1150  
1151 -
1152 -
1153 -
1154 1154  = 7. ​ Packing Info =
1155 1155  
1156 1156  
... ... @@ -1165,9 +1165,6 @@
1165 1165  * Package Size / pcs : cm
1166 1166  * Weight / pcs : g
1167 1167  
1168 -
1169 -
1170 -
1171 1171  = 8.  ​Support =
1172 1172  
1173 1173  * 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.
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