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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 150.42
edited by Xiaoling
on 2022/06/11 09:14
Change comment: There is no comment for this version
To version 172.8
edited by Xiaoling
on 2022/06/15 10:04
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
... ... @@ -84,69 +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 -**(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.**
130 +[[image:image-20220615091045-3.png]]
113 113  
114 114  
115 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
116 116  
134 +(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
117 117  
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.
118 118  
119 -== 1.5 ​ Applications ==
138 +[[image:image-20220615092010-11.png]]
120 120  
121 -* Horizontal distance measurement
122 -* Liquid level measurement
123 -* Parking management system
124 -* Object proximity and presence detection
125 -* Intelligent trash can management system
126 -* Robot obstacle avoidance
127 -* Automatic control
128 -* Sewer
129 -* Bottom water level monitoring
130 130  
141 +No polish needed if the container is shine metal surface without paint or non-metal container.
131 131  
143 +[[image:image-20220615092044-12.png]]
132 132  
133 -== 1.6  Pin mapping and power on ==
134 134  
135 135  
136 -[[image:1654847583902-256.png]]
147 +(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
137 137  
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.
138 138  
139 139  
140 -= 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.
141 141  
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 +
142 142  == 2.1  How it works ==
143 143  
144 144  (((
145 -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.
146 146  )))
147 147  
148 148  (((
149 -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.
150 150  )))
151 151  
152 152  
... ... @@ -158,7 +158,7 @@
158 158  )))
159 159  
160 160  (((
161 -[[image:1654848616367-242.png]]
242 +[[image:1655257698953-697.png]]
162 162  )))
163 163  
164 164  (((
... ... @@ -166,21 +166,31 @@
166 166  )))
167 167  
168 168  (((
169 -(% 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.
170 170  )))
171 171  
172 172  (((
173 -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.
174 174  )))
175 175  
176 176  [[image:image-20220607170145-1.jpeg]]
177 177  
178 178  
262 +(((
179 179  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
264 +)))
180 180  
266 +(((
181 181  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
268 +)))
182 182  
270 +(((
271 +
272 +
183 183  **Add APP EUI in the application**
274 +)))
184 184  
185 185  [[image:image-20220610161353-4.png]]
186 186  
... ... @@ -192,6 +192,7 @@
192 192  [[image:image-20220610161353-7.png]]
193 193  
194 194  
286 +
195 195  You can also choose to create the device manually.
196 196  
197 197   [[image:image-20220610161538-8.png]]
... ... @@ -204,16 +204,17 @@
204 204  
205 205  
206 206  
207 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
208 208  
209 209  
210 210  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
211 211  
212 -[[image:image-20220610161724-10.png]]
304 +[[image:image-20220615095102-14.png]]
213 213  
214 214  
307 +
215 215  (((
216 -(% 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.
217 217  )))
218 218  
219 219  [[image:1654849068701-275.png]]
... ... @@ -223,11 +223,13 @@
223 223  == 2.3  ​Uplink Payload ==
224 224  
225 225  (((
226 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
319 +(((
320 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
227 227  
228 -Uplink payload includes in total 4 bytes.
229 -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).
230 230  )))
325 +)))
231 231  
232 232  (((
233 233  
... ... @@ -252,7 +252,7 @@
252 252  === 2.3.1  Battery Info ===
253 253  
254 254  
255 -Check the battery voltage for LDDS75.
350 +Check the battery voltage for LDDS20.
256 256  
257 257  Ex1: 0x0B45 = 2885mV
258 258  
... ... @@ -262,17 +262,22 @@
262 262  
263 263  === 2.3.2  Distance ===
264 264  
265 -Get the distance. Flat object range 280mm - 7500mm.
360 +(((
361 +Get the distance. Flat object range 20mm - 2000mm.
362 +)))
266 266  
267 -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 +)))
268 268  
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.
269 269  
270 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
271 -* 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.
272 272  
372 +
273 273  === 2.3.3  Interrupt Pin ===
274 274  
275 -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.
276 276  
277 277  **Example:**
278 278  
... ... @@ -298,9 +298,13 @@
298 298  
299 299  === 2.3.5  Sensor Flag ===
300 300  
401 +(((
301 301  0x01: Detect Ultrasonic Sensor
403 +)))
302 302  
405 +(((
303 303  0x00: No Ultrasonic Sensor
407 +)))
304 304  
305 305  
306 306  
... ... @@ -313,7 +313,9 @@
313 313  
314 314  The payload decoder function for TTN V3 is here:
315 315  
316 -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 +)))
317 317  
318 318  
319 319  
... ... @@ -842,10 +842,17 @@
842 842  == 2.8  ​Firmware Change Log ==
843 843  
844 844  
951 +(((
845 845  **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 +)))
846 846  
955 +(((
956 +
957 +)))
847 847  
959 +(((
848 848  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
961 +)))
849 849  
850 850  
851 851  
... ... @@ -989,7 +989,9 @@
989 989  [[image:image-20220610172924-5.png]]
990 990  
991 991  
1105 +(((
992 992  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 +)))
993 993  
994 994  
995 995   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -1013,16 +1013,19 @@
1013 1013  (((
1014 1014  Format: Command Code (0x01) followed by 3 bytes time value.
1015 1015  
1131 +(((
1016 1016  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1133 +)))
1017 1017  
1018 1018  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1019 1019  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1020 1020  )))
1138 +)))
1021 1021  
1022 1022  
1023 -
1024 -)))
1025 1025  
1142 +
1143 +
1026 1026  == 3.3  Set Interrupt Mode ==
1027 1027  
1028 1028  Feature, Set Interrupt mode for GPIO_EXIT.
... ... @@ -1036,7 +1036,9 @@
1036 1036  
1037 1037  Format: Command Code (0x06) followed by 3 bytes.
1038 1038  
1157 +(((
1039 1039  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 +)))
1040 1040  
1041 1041  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1042 1042  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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