Last modified by Mengting Qiu on 2024/03/07 08:41
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From version < 138.3 >
edited by Xiaoling
on 2022/06/10 17:04
To version < 147.2 >
edited by Xiaoling
on 2022/06/10 17:34
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... ... @@ -58,8 +58,6 @@
58 58  * 4000mAh or 8500mAh Battery for long term use
59 59  
60 60  
61 -
62 -
63 63  == 1.3  Specification ==
64 64  
65 65  === 1.3.1  Rated environmental conditions ===
... ... @@ -74,16 +74,20 @@
74 74  
75 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.**[[image:image-20220610155021-2.png||height="440" width="1189"]]
75 +**(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  
79 79  
80 80  
81 -**(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"]]
79 +[[image:1654852253176-749.png]]
82 82  
83 -(% style="display:none" %) (%%)
84 84  
82 +**(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.**
85 85  
86 86  
85 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
86 +
87 +
88 +
87 87  == 1.5 ​ Applications ==
88 88  
89 89  * Horizontal distance measurement
... ... @@ -97,8 +97,6 @@
97 97  * Bottom water level monitoring
98 98  
99 99  
100 -
101 -
102 102  == 1.6  Pin mapping and power on ==
103 103  
104 104  
... ... @@ -119,6 +119,7 @@
119 119  )))
120 120  
121 121  
122 +
122 122  == 2.2  ​Quick guide to connect to LoRaWAN server (OTAA) ==
123 123  
124 124  (((
... ... @@ -250,6 +250,7 @@
250 250  0x01: Interrupt Uplink Packet.
251 251  
252 252  
254 +
253 253  === 2.3.4  DS18B20 Temperature sensor ===
254 254  
255 255  This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
... ... @@ -533,7 +533,6 @@
533 533  
534 534  
535 535  
536 -
537 537  === 2.6.4  AU915-928(AU915) ===
538 538  
539 539  (((
... ... @@ -690,7 +690,6 @@
690 690  
691 691  
692 692  
693 -
694 694  === 2.6.6  KR920-923 (KR920) ===
695 695  
696 696  (((
... ... @@ -763,7 +763,6 @@
763 763  
764 764  
765 765  
766 -
767 767  === 2.6.7  IN865-867 (IN865) ===
768 768  
769 769  (((
... ... @@ -800,18 +800,21 @@
800 800  
801 801  
802 802  
803 -
804 804  == 2.7  LED Indicator ==
805 805  
806 -The LLDS12 has an internal LED which is to show the status of different state.
804 +The LDDS75 has an internal LED which is to show the status of different state.
807 807  
808 -* The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
806 +
807 +* Blink once when device power on.
808 +* The device detects the sensor and flashes 5 times.
809 +* Solid ON for 5 seconds once device successful Join the network.
809 809  * Blink once when device transmit a packet.
810 810  
812 +
811 811  == 2.8  ​Firmware Change Log ==
812 812  
813 813  
814 -**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/]]
816 +**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/]]
815 815  
816 816  
817 817  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
... ... @@ -818,71 +818,58 @@
818 818  
819 819  
820 820  
821 -= 3.  LiDAR ToF Measurement =
823 +== 2.9  Mechanical ==
822 822  
823 -== 3.1 Principle of Distance Measurement ==
824 824  
825 -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.
826 +[[image:image-20220610172003-1.png]]
826 826  
827 -[[image:1654831757579-263.png]]
828 +[[image:image-20220610172003-2.png]]
828 828  
829 829  
831 +== 2.10  Battery Analysis ==
830 830  
831 -== 3.2 Distance Measurement Characteristics ==
833 +=== 2.10.1  Battery Type ===
832 832  
833 -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:
835 +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.
834 834  
835 -[[image:1654831774373-275.png]]
836 836  
838 +The battery related documents as below:
837 837  
838 -(((
839 -(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
840 +* (((
841 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
840 840  )))
841 -
842 -(((
843 -(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
843 +* (((
844 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
844 844  )))
845 -
846 -(((
847 -(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
846 +* (((
847 +[[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]]
848 848  )))
849 849  
850 + [[image:image-20220610172400-3.png]]
850 850  
851 -(((
852 -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:
853 -)))
854 854  
855 855  
856 -[[image:1654831797521-720.png]]
854 +=== 2.10.2  Replace the battery ===
857 857  
856 +(((
857 +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.
858 +)))
858 858  
859 859  (((
860 -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.
861 +
861 861  )))
862 862  
863 -[[image:1654831810009-716.png]]
864 -
865 -
866 866  (((
867 -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.
865 +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)
868 868  )))
869 869  
870 870  
871 871  
872 -== 3.3 Notice of usage: ==
870 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
873 873  
874 -Possible invalid /wrong reading for LiDAR ToF tech:
875 -
876 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
877 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
878 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
879 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
880 -
881 -= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
882 -
883 883  (((
884 884  (((
885 -Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
874 +Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
886 886  )))
887 887  )))
888 888  
... ... @@ -903,7 +903,7 @@
903 903  )))
904 904  
905 905  (((
906 -There are two kinds of commands to configure LLDS12, they are:
895 +There are two kinds of commands to configure LDDS75, they are:
907 907  )))
908 908  )))
909 909  
... ... @@ -944,55 +944,49 @@
944 944  
945 945  * (((
946 946  (((
947 -(% style="color:#4f81bd" %)** Commands special design for LLDS12**
936 +(% style="color:#4f81bd" %)** Commands special design for LDDS75**
948 948  )))
949 949  )))
950 950  
951 951  (((
952 952  (((
953 -These commands only valid for LLDS12, as below:
942 +These commands only valid for LDDS75, as below:
954 954  )))
955 955  )))
956 956  
957 957  
958 958  
959 -== 4.1  Set Transmit Interval Time ==
948 +== 3.1  Access AT Commands ==
960 960  
961 -Feature: Change LoRaWAN End Node Transmit Interval.
950 +LDDS75 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LDDS75 for using AT command, as below.
962 962  
963 -(% style="color:#037691" %)**AT Command: AT+TDC**
952 +[[image:image-20220610172924-4.png||height="483" width="988"]]
964 964  
965 -[[image:image-20220607171554-8.png]]
966 966  
955 +Or if you have below board, use below connection:
967 967  
968 -(((
969 -(% style="color:#037691" %)**Downlink Command: 0x01**
970 -)))
971 971  
972 -(((
973 -Format: Command Code (0x01) followed by 3 bytes time value.
974 -)))
958 +[[image:image-20220610172924-5.png]]
975 975  
976 -(((
977 -If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
978 -)))
979 979  
980 -* (((
981 -Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
982 -)))
983 -* (((
984 -Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
985 -)))
961 +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:
986 986  
987 -== 4.2  Set Interrupt Mode ==
988 988  
989 -Feature, Set Interrupt mode for GPIO_EXIT.
964 + [[image:image-20220610172924-6.png||height="601" width="860"]]
990 990  
991 -(% style="color:#037691" %)**AT Command: AT+INTMOD**
992 992  
993 -[[image:image-20220610105806-2.png]]
994 994  
968 +== 3.2  Set Transmit Interval Time ==
995 995  
970 +Feature: Change LoRaWAN End Node Transmit Interval.
971 +
972 +(% style="color:#037691" %)**AT Command: AT+TDC**
973 +
974 +[[image:image-20220610173409-7.png]]
975 +
976 +
977 +
978 +
996 996  (((
997 997  (% style="color:#037691" %)**Downlink Command: 0x06**
998 998  )))
... ... @@ -1012,7 +1012,7 @@
1012 1012  Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1013 1013  )))
1014 1014  
1015 -== 4.3  Get Firmware Version Info ==
998 +== 3.3  Get Firmware Version Info ==
1016 1016  
1017 1017  Feature: use downlink to get firmware version.
1018 1018  
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