Last modified by Xiaoling on 2025/04/27 16:45
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From version < 150.46 >
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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  
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25 25  )))
26 26  
27 27  (((
28 -
29 -)))
30 -
31 -(((
32 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.
33 33  )))
34 34  
35 35  (((
36 -
37 -)))
38 -
39 -(((
40 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.
41 41  )))
42 42  
43 43  (((
44 -
45 -)))
46 -
47 -(((
48 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*.
49 49  )))
50 50  
51 51  (((
52 -
53 -)))
54 -
55 -(((
56 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.
57 57  )))
58 58  
59 59  (((
60 -
61 -)))
62 -
63 -(((
64 64  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
65 65  )))
66 66  )))
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94 94  [[image:image-20220610154839-1.png]]
95 95  
96 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)**
78 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
79 +
80 +**~ 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 98  )))
99 99  
100 100  
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131 131  * Bottom water level monitoring
132 132  
133 133  
134 -
135 135  == 1.6  Pin mapping and power on ==
136 136  
137 137  
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168 168  )))
169 169  
170 170  (((
153 +
154 +
171 171  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
172 172  )))
173 173  
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187 187  )))
188 188  
189 189  (((
174 +
175 +
190 190  **Add APP EUI in the application**
191 191  )))
192 192  
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274 274  
275 275  === 2.3.2  Distance ===
276 276  
263 +(((
277 277  Get the distance. Flat object range 280mm - 7500mm.
265 +)))
278 278  
267 +(((
279 279  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.**
269 +)))
280 280  
281 281  
282 282  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
283 283  * 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  
275 +
285 285  === 2.3.3  Interrupt Pin ===
286 286  
287 287  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.
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310 310  
311 311  === 2.3.5  Sensor Flag ===
312 312  
304 +(((
313 313  0x01: Detect Ultrasonic Sensor
306 +)))
314 314  
308 +(((
315 315  0x00: No Ultrasonic Sensor
310 +)))
316 316  
317 317  
318 318  
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325 325  
326 326  The payload decoder function for TTN V3 is here:
327 327  
323 +(((
328 328  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/]]
325 +)))
329 329  
330 330  
331 331  
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851 851  * Solid ON for 5 seconds once device successful Join the network.
852 852  * Blink once when device transmit a packet.
853 853  
851 +
854 854  == 2.8  ​Firmware Change Log ==
855 855  
856 856  
855 +(((
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/]]
857 +)))
858 858  
859 +(((
860 +
861 +)))
859 859  
863 +(((
860 860  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
865 +)))
861 861  
862 862  
863 863  
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1001 1001  [[image:image-20220610172924-5.png]]
1002 1002  
1003 1003  
1009 +(((
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:
1011 +)))
1005 1005  
1006 1006  
1007 1007   [[image:image-20220610172924-6.png||height="601" width="860"]]
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1025 1025  (((
1026 1026  Format: Command Code (0x01) followed by 3 bytes time value.
1027 1027  
1035 +(((
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.
1037 +)))
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  )))
1042 +)))
1033 1033  
1034 1034  
1035 -
1036 -)))
1037 1037  
1046 +
1047 +
1038 1038  == 3.3  Set Interrupt Mode ==
1039 1039  
1040 1040  Feature, Set Interrupt mode for GPIO_EXIT.
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1048 1048  
1049 1049  Format: Command Code (0x06) followed by 3 bytes.
1050 1050  
1061 +(((
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.
1063 +)))
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
1055 1055  
1068 +
1056 1056  = 4.  FAQ =
1057 1057  
1058 1058  == 4.1  What is the frequency plan for LDDS75? ==
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1112 1112  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1113 1113  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1114 1114  
1128 +
1115 1115  = 7. ​ Packing Info =
1116 1116  
1117 1117  
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1126 1126  * Package Size / pcs : cm
1127 1127  * Weight / pcs : g
1128 1128  
1143 +
1129 1129  = 8.  ​Support =
1130 1130  
1131 1131  * 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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