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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  
... ... @@ -12,35 +12,76 @@
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 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
44 44  
45 45  
46 46  
... ... @@ -48,9 +48,10 @@
48 48  
49 49  * LoRaWAN 1.0.3 Class A
50 50  * Ultra low power consumption
51 -* Distance Detection by Ultrasonic technology
52 -* Flat object range 280mm - 7500mm
53 -* 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)
54 54  * Cable Length : 25cm
55 55  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
56 56  * AT Commands to change parameters
... ... @@ -57,38 +57,113 @@
57 57  * Uplink on periodically
58 58  * Downlink to change configure
59 59  * IP66 Waterproof Enclosure
60 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
61 61  
62 62  
63 -== 1.3  Specification ==
104 +== 1.3  Suitable Container & Liquid ==
64 64  
65 -=== 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.
66 66  
67 -[[image:image-20220610154839-1.png]]
68 68  
69 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
114 +== 1.4  Mechanical ==
70 70  
71 -**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 +[[image:image-20220615090910-1.png]]
72 72  
73 73  
119 +[[image:image-20220615090910-2.png]]
74 74  
75 -=== 1.3.2  Effective measurement range Reference beam pattern ===
76 76  
77 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
78 78  
123 +== 1.5  Install LDDS20 ==
79 79  
80 80  
81 -[[image:1654852253176-749.png]]
126 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
82 82  
128 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
83 83  
130 +[[image:image-20220615091045-3.png]]
84 84  
85 -**(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.**
86 86  
87 87  
88 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
134 +(% style="color:blue" %)**Step 2**(%%): Polish the installation point.
89 89  
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.
90 90  
138 +[[image:image-20220615092010-11.png]]
91 91  
140 +
141 +No polish needed if the container is shine metal surface without paint or non-metal container.
142 +
143 +[[image:image-20220615092044-12.png]]
144 +
145 +
146 +(% style="color:blue" %)**Step3: **(%%)Test the installation point.
147 +
148 +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.
149 +
150 +
151 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
152 +
153 +
154 +
155 +|(((
156 +BLUE LED
157 +)))
158 +
159 +[[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
160 +
161 +
162 +
163 +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.
164 +
165 +
166 +(% style="color:blue" %)LED Status:
167 +
168 +* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
169 +
170 +* (% 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.
171 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
172 +
173 +LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
174 +
175 +Note 2:
176 +
177 +Ultrasonic coupling paste is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
178 +
179 +
180 +(% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue.
181 +
182 +[[image:image-20220615091045-8.png]]
183 +
184 +Prepare Eproxy AB glue.
185 +
186 +
187 +Put Eproxy AB glue in the sensor and press it hard on the container installation point.
188 +
189 +
190 +Reset LDDS20 and see if the BLUE LED is slowly blinking.
191 +
192 +[[image:image-20220615091045-9.png]]
193 +
194 +(% style="color:red" %)Note1:
195 +
196 +Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
197 +
198 +
199 +(% style="color:red" %)Note 2:
200 +
201 +(% style="color:blue" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
202 +
203 +
204 +
205 +
206 +
207 +
92 92  == 1.5 ​ Applications ==
93 93  
94 94  * Horizontal distance measurement
... ... @@ -101,8 +101,6 @@
101 101  * Sewer
102 102  * Bottom water level monitoring
103 103  
104 -
105 -
106 106  == 1.6  Pin mapping and power on ==
107 107  
108 108  
... ... @@ -139,6 +139,8 @@
139 139  )))
140 140  
141 141  (((
256 +
257 +
142 142  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
143 143  )))
144 144  
... ... @@ -149,11 +149,19 @@
149 149  [[image:image-20220607170145-1.jpeg]]
150 150  
151 151  
268 +(((
152 152  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
270 +)))
153 153  
272 +(((
154 154  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
274 +)))
155 155  
276 +(((
277 +
278 +
156 156  **Add APP EUI in the application**
280 +)))
157 157  
158 158  [[image:image-20220610161353-4.png]]
159 159  
... ... @@ -196,11 +196,15 @@
196 196  == 2.3  ​Uplink Payload ==
197 197  
198 198  (((
323 +(((
199 199  LDDS75 will uplink payload via LoRaWAN with below payload format: 
325 +)))
200 200  
327 +(((
201 201  Uplink payload includes in total 4 bytes.
202 202  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
203 203  )))
331 +)))
204 204  
205 205  (((
206 206  
... ... @@ -235,17 +235,18 @@
235 235  
236 236  === 2.3.2  Distance ===
237 237  
366 +(((
238 238  Get the distance. Flat object range 280mm - 7500mm.
368 +)))
239 239  
370 +(((
240 240  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.**
372 +)))
241 241  
242 242  
243 243  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
244 244  * 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.
245 245  
246 -
247 -
248 -
249 249  === 2.3.3  Interrupt Pin ===
250 250  
251 251  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.
... ... @@ -274,9 +274,13 @@
274 274  
275 275  === 2.3.5  Sensor Flag ===
276 276  
406 +(((
277 277  0x01: Detect Ultrasonic Sensor
408 +)))
278 278  
410 +(((
279 279  0x00: No Ultrasonic Sensor
412 +)))
280 280  
281 281  
282 282  
... ... @@ -289,7 +289,9 @@
289 289  
290 290  The payload decoder function for TTN V3 is here:
291 291  
425 +(((
292 292  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/]]
427 +)))
293 293  
294 294  
295 295  
... ... @@ -815,16 +815,20 @@
815 815  * Solid ON for 5 seconds once device successful Join the network.
816 816  * Blink once when device transmit a packet.
817 817  
818 -
819 -
820 -
821 821  == 2.8  ​Firmware Change Log ==
822 822  
823 823  
956 +(((
824 824  **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/]]
958 +)))
825 825  
960 +(((
961 +
962 +)))
826 826  
964 +(((
827 827  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
966 +)))
828 828  
829 829  
830 830  
... ... @@ -833,9 +833,11 @@
833 833  
834 834  [[image:image-20220610172003-1.png]]
835 835  
975 +
836 836  [[image:image-20220610172003-2.png]]
837 837  
838 838  
979 +
839 839  == 2.10  Battery Analysis ==
840 840  
841 841  === 2.10.1  Battery Type ===
... ... @@ -846,7 +846,7 @@
846 846  The battery related documents as below:
847 847  
848 848  * (((
849 -[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
990 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
850 850  )))
851 851  * (((
852 852  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
... ... @@ -862,7 +862,7 @@
862 862  === 2.10.2  Replace the battery ===
863 863  
864 864  (((
865 -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.
1006 +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.
866 866  )))
867 867  
868 868  (((
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870 870  )))
871 871  
872 872  (((
873 -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)
1014 +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)
874 874  )))
875 875  
876 876  
... ... @@ -885,7 +885,7 @@
885 885  
886 886  * (((
887 887  (((
888 -AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
1029 +AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
889 889  )))
890 890  )))
891 891  * (((
... ... @@ -966,7 +966,9 @@
966 966  [[image:image-20220610172924-5.png]]
967 967  
968 968  
1110 +(((
969 969  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:
1112 +)))
970 970  
971 971  
972 972   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -990,16 +990,19 @@
990 990  (((
991 991  Format: Command Code (0x01) followed by 3 bytes time value.
992 992  
1136 +(((
993 993  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1138 +)))
994 994  
995 995  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
996 996  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
997 997  )))
1143 +)))
998 998  
999 999  
1000 -
1001 -)))
1002 1002  
1147 +
1148 +
1003 1003  == 3.3  Set Interrupt Mode ==
1004 1004  
1005 1005  Feature, Set Interrupt mode for GPIO_EXIT.
... ... @@ -1013,7 +1013,9 @@
1013 1013  
1014 1014  Format: Command Code (0x06) followed by 3 bytes.
1015 1015  
1162 +(((
1016 1016  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1164 +)))
1017 1017  
1018 1018  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1019 1019  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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