<
From version < 150.34 >
edited by Xiaoling
on 2022/06/11 09:10
To version < 150.46 >
edited by Xiaoling
on 2022/06/11 09:17
>
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Summary

Details

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Content
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21 21  
22 22  (((
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23 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.
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26 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.
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29 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.
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32 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*.
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35 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.
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38 38  (% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
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41 41  
42 42  
43 43  [[image:1654847051249-359.png]]
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59 59  * IP66 Waterproof Enclosure
60 60  * 4000mAh or 8500mAh Battery for long term use
61 61  
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62 62  == 1.3  Specification ==
63 63  
64 64  === 1.3.1  Rated environmental conditions ===
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65 65  
66 66  [[image:image-20220610154839-1.png]]
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68 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
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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)**
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69 69  
70 -**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)**
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74 74  === 1.3.2  Effective measurement range Reference beam pattern ===
75 75  
76 76  **(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
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84 84  **(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.**
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86 86  
87 87  [[image:1654852175653-550.png]](% style="display:none" %) ** **
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100 100  * Sewer
101 101  * Bottom water level monitoring
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103 103  == 1.6  Pin mapping and power on ==
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146 146  [[image:image-20220607170145-1.jpeg]]
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149 149  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
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151 151  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
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153 153  **Add APP EUI in the application**
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154 154  
155 155  [[image:image-20220610161353-4.png]]
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193 193  == 2.3  ​Uplink Payload ==
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196 196  LDDS75 will uplink payload via LoRaWAN with below payload format: 
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198 198  Uplink payload includes in total 4 bytes.
199 199  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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240 240  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
241 241  * 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.
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244 244  === 2.3.3  Interrupt Pin ===
245 245  
246 246  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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810 810  * Solid ON for 5 seconds once device successful Join the network.
811 811  * Blink once when device transmit a packet.
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814 814  == 2.8  ​Firmware Change Log ==
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1013 1013  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1014 1014  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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1018 1018  = 4.  FAQ =
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1020 1020  == 4.1  What is the frequency plan for LDDS75? ==
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1074 1074  * (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1075 1075  * (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1079 1079  = 7. ​ Packing Info =
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1090 1090  * Package Size / pcs : cm
1091 1091  * Weight / pcs : g
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1095 1095  = 8.  ​Support =
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1097 1097  * 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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