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From version < 137.5 >
edited by Xiaoling
on 2022/06/10 17:03
To version < 146.1 >
edited by Xiaoling
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57 57  * IP66 Waterproof Enclosure
58 58  * 4000mAh or 8500mAh Battery for long term use
59 59  
60 +
61 +
60 60  == 1.3  Specification ==
61 61  
62 62  === 1.3.1  Rated environmental conditions ===
... ... @@ -71,15 +71,20 @@
71 71  
72 72  === 1.3.2  Effective measurement range Reference beam pattern ===
73 73  
74 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**[[image:image-20220610155021-2.png||height="440" width="1189"]]
76 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
75 75  
76 76  
77 77  
78 -**(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.[[image:image-20220610155021-3.png||height="437" width="1192"]]
80 +[[image:1654852253176-749.png]]
79 79  
80 -(% style="display:none" %) (%%)
81 81  
83 +**(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.**
82 82  
85 +
86 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
87 +
88 +
89 +
83 83  == 1.5 ​ Applications ==
84 84  
85 85  * Horizontal distance measurement
... ... @@ -92,6 +92,8 @@
92 92  * Sewer
93 93  * Bottom water level monitoring
94 94  
102 +
103 +
95 95  == 1.6  Pin mapping and power on ==
96 96  
97 97  
... ... @@ -98,6 +98,7 @@
98 98  [[image:1654847583902-256.png]]
99 99  
100 100  
110 +
101 101  = 2.  Configure LDDS75 to connect to LoRaWAN network =
102 102  
103 103  == 2.1  How it works ==
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111 111  )))
112 112  
113 113  
124 +
114 114  == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
115 115  
116 116  (((
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243 243  0x01: Interrupt Uplink Packet.
244 244  
245 245  
257 +
246 246  === 2.3.4  DS18B20 Temperature sensor ===
247 247  
248 248  This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
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526 526  
527 527  
528 528  
529 -
530 530  === 2.6.4  AU915-928(AU915) ===
531 531  
532 532  (((
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683 683  
684 684  
685 685  
686 -
687 687  === 2.6.6  KR920-923 (KR920) ===
688 688  
689 689  (((
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756 756  
757 757  
758 758  
759 -
760 760  === 2.6.7  IN865-867 (IN865) ===
761 761  
762 762  (((
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793 793  
794 794  
795 795  
796 -
797 797  == 2.7  LED Indicator ==
798 798  
799 -The LLDS12 has an internal LED which is to show the status of different state.
807 +The LDDS75 has an internal LED which is to show the status of different state.
800 800  
801 -* The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
809 +
810 +* Blink once when device power on.
811 +* The device detects the sensor and flashes 5 times.
812 +* Solid ON for 5 seconds once device successful Join the network.
802 802  * Blink once when device transmit a packet.
803 803  
815 +
816 +
804 804  == 2.8  ​Firmware Change Log ==
805 805  
806 806  
807 -**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LLDS12/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LLDS12/Firmware/]]
820 +**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/]]
808 808  
809 809  
810 810  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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811 811  
812 812  
813 813  
814 -= 3.  LiDAR ToF Measurement =
827 +== 2.9  Mechanical ==
815 815  
816 -== 3.1 Principle of Distance Measurement ==
817 817  
818 -The LiDAR probe is based on TOF, namely, Time of Flight principle. To be specific, the product emits modulation wave of near infrared ray on a periodic basis, which will be reflected after contacting object. The product obtains the time of flight by measuring round-trip phase difference and then calculates relative range between the product and the detection object, as shown below.
830 +[[image:image-20220610172003-1.png]]
819 819  
820 -[[image:1654831757579-263.png]]
832 +[[image:image-20220610172003-2.png]]
821 821  
822 822  
835 +== 2.10  Battery Analysis  ==
823 823  
824 -== 3.2 Distance Measurement Characteristics ==
837 +=== 2.10.1  Battery Type ===
825 825  
826 -With optimization of light path and algorithm, The LiDAR probe has minimized influence from external environment on distance measurement performance. Despite that, the range of distance measurement may still be affected by the environment illumination intensity and the reflectivity of detection object. As shown in below:
839 +The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
827 827  
828 -[[image:1654831774373-275.png]]
829 829  
842 +The battery related documents as below:
830 830  
831 -(((
832 -(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
844 +* (((
845 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
833 833  )))
834 -
835 -(((
836 -(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
847 +* (((
848 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
837 837  )))
838 -
839 -(((
840 -(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
850 +* (((
851 +[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
841 841  )))
842 842  
854 + [[image:image-20220610172400-3.png]]
843 843  
844 -(((
845 -Vertical Coordinates: Represents the radius of light spot for The LiDAR probe at the different distances. The diameter of light spot depends on the FOV of The LiDAR probe (the term of FOV generally refers to the smaller value between the receiving angle and the transmitting angle), which is calculated as follows:
846 -)))
847 847  
848 848  
849 -[[image:1654831797521-720.png]]
858 +=== 2.10.2  Replace the battery ===
850 850  
860 +(((
861 +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.
862 +)))
851 851  
852 852  (((
853 -In the formula above, d is the diameter of light spot; D is detecting range; β is the value of the receiving angle of The LiDAR probe, 3.6°. Correspondence between the diameter of light spot and detecting range is given in Table below.
865 +
854 854  )))
855 855  
856 -[[image:1654831810009-716.png]]
857 -
858 -
859 859  (((
860 -If the light spot reaches two objects with different distances, as shown in Figure 3, the output distance value will be a value between the actual distance values of the two objects. For a high accuracy requirement in practice, the above situation should be noticed to avoid the measurement error.
869 +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)
861 861  )))
862 862  
863 863  
864 864  
865 -== 3.3 Notice of usage: ==
874 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
866 866  
867 -Possible invalid /wrong reading for LiDAR ToF tech:
868 -
869 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
870 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
871 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
872 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
873 -
874 -= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
875 -
876 876  (((
877 877  (((
878 878  Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
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