Last modified by Mengting Qiu on 2025/02/26 15:04
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From version < 150.20 >
edited by Xiaoling
on 2022/06/11 08:50
To version < 150.46 >
edited by Xiaoling
on 2022/06/11 09:17
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Summary

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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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42 42  
43 43  [[image:1654847051249-359.png]]
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66 66  
67 67  [[image:image-20220610154839-1.png]]
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69 -**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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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)**
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74 -
75 75  === 1.3.2  Effective measurement range Reference beam pattern ===
76 76  
77 77  **(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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85 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.**
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88 88  [[image:1654852175653-550.png]](% style="display:none" %) ** **
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149 149  [[image:image-20220607170145-1.jpeg]]
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152 152  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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154 154  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
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156 156  **Add APP EUI in the application**
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157 157  
158 158  [[image:image-20220610161353-4.png]]
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196 196  == 2.3  ​Uplink Payload ==
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199 199  LDDS75 will uplink payload via LoRaWAN with below payload format: 
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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
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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.
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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.
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830 830  
831 831  [[image:image-20220610172003-1.png]]
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833 833  [[image:image-20220610172003-2.png]]
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836 836  == 2.10  Battery Analysis ==
837 837  
838 838  === 2.10.1  Battery Type ===
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843 843  The battery related documents as below:
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845 845  * (((
846 -[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
884 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
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849 849  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
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859 859  === 2.10.2  Replace the battery ===
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862 -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.
900 +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.
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870 -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)
908 +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)
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883 883  * (((
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885 -AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
923 +AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
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888 888  * (((

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