Changes for page LMDS200 -- LoRaWAN Microwave Radar Distance Sensor User Manual
Last modified by Mengting Qiu on 2024/03/07 08:41
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... ... @@ -58,7 +58,6 @@ 58 58 * 4000mAh or 8500mAh Battery for long term use 59 59 60 60 61 - 62 62 == 1.3 Specification == 63 63 64 64 === 1.3.1 Rated environmental conditions === ... ... @@ -73,16 +73,20 @@ 73 73 74 74 === 1.3.2 Effective measurement range Reference beam pattern === 75 75 76 -**(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.** 77 77 78 78 79 79 80 - **(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]] 81 81 82 -(% style="display:none" %) (%%) 83 83 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.** 84 84 85 85 85 +[[image:1654852175653-550.png]](% style="display:none" %) ** ** 86 + 87 + 88 + 86 86 == 1.5 Applications == 87 87 88 88 * Horizontal distance measurement ... ... @@ -96,7 +96,6 @@ 96 96 * Bottom water level monitoring 97 97 98 98 99 - 100 100 == 1.6 Pin mapping and power on == 101 101 102 102 ... ... @@ -238,8 +238,6 @@ 238 238 * 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. 239 239 240 240 241 - 242 - 243 243 === 2.3.3 Interrupt Pin === 244 244 245 245 This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up. ... ... @@ -535,7 +535,6 @@ 535 535 536 536 537 537 538 - 539 539 === 2.6.4 AU915-928(AU915) === 540 540 541 541 ((( ... ... @@ -692,7 +692,6 @@ 692 692 693 693 694 694 695 - 696 696 === 2.6.6 KR920-923 (KR920) === 697 697 698 698 ((( ... ... @@ -765,7 +765,6 @@ 765 765 766 766 767 767 768 - 769 769 === 2.6.7 IN865-867 (IN865) === 770 770 771 771 ((( ... ... @@ -802,18 +802,21 @@ 802 802 803 803 804 804 805 - 806 806 == 2.7 LED Indicator == 807 807 808 -The L LDS12has 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. 809 809 810 -* 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. 811 811 * Blink once when device transmit a packet. 812 812 812 + 813 813 == 2.8 Firmware Change Log == 814 814 815 815 816 -**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/L LDS12/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/]] 817 817 818 818 819 819 **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]] ... ... @@ -820,71 +820,58 @@ 820 820 821 821 822 822 823 -= 3.LiDAR ToFMeasurement=823 +== 2.9 Mechanical == 824 824 825 -== 3.1 Principle of Distance Measurement == 826 826 827 - 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 contactingobject.Theproduct 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]] 828 828 829 -[[image: 1654831757579-263.png]]828 +[[image:image-20220610172003-2.png]] 830 830 831 831 831 +== 2.10 Battery Analysis == 832 832 833 -== 3.2Distance MeasurementCharacteristics==833 +=== 2.10.1 Battery Type === 834 834 835 - Withoptimization oflight pathand algorithm,TheLiDARprobehas minimizedinfluence fromexternalenvironmentondistancemeasurementperformance.Despite that,the rangeofdistancemeasurementmaystillbeaffectedbytheenvironment illuminationintensityandthe reflectivityofdetection object. As showninbelow: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. 836 836 837 -[[image:1654831774373-275.png]] 838 838 838 +The battery related documents as below: 839 839 840 -((( 841 - (%style="color:blue"%)**① **(%%)Representsthe detectionblind zone of The LiDARprobe, 0-10cm,withinwhichtheoutput data is unreliable.840 +* ((( 841 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]], 842 842 ))) 843 - 844 -((( 845 -(% 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]], 846 846 ))) 847 - 848 -((( 849 -(% 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]] 850 850 ))) 851 851 850 + [[image:image-20220610172400-3.png]] 852 852 853 -((( 854 -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: 855 -))) 856 856 857 857 858 - [[image:1654831797521-720.png]]854 +=== 2.10.2 Replace the battery === 859 859 856 +((( 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 +))) 860 860 861 861 ((( 862 - Inthe 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 + 863 863 ))) 864 864 865 -[[image:1654831810009-716.png]] 866 - 867 - 868 868 ((( 869 - If the lightspotreachestwoobjectswithdifferent distances,asshown inFigure3, theoutput distancevaluewillbeavaluebetween theactual distancevaluesofthe twoobjects.Forahighaccuracy requirementinpractice,theabove situation should benoticedtoavoid themeasurementrror.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) 870 870 ))) 871 871 872 872 873 873 874 -= =3.3Notice ofusage:==870 += 3. Configure LLDS12 via AT Command or LoRaWAN Downlink = 875 875 876 -Possible invalid /wrong reading for LiDAR ToF tech: 877 - 878 -* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings. 879 -* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong. 880 -* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe. 881 -* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window. 882 - 883 -= 4. Configure LLDS12 via AT Command or LoRaWAN Downlink = 884 - 885 885 ((( 886 886 ((( 887 -Use can configure L LDS12via AT Command or LoRaWAN Downlink.874 +Use can configure LDDS75 via AT Command or LoRaWAN Downlink. 888 888 ))) 889 889 ))) 890 890 ... ... @@ -905,7 +905,7 @@ 905 905 ))) 906 906 907 907 ((( 908 -There are two kinds of commands to configure L LDS12, they are:895 +There are two kinds of commands to configure LDDS75, they are: 909 909 ))) 910 910 ))) 911 911 ... ... @@ -946,55 +946,49 @@ 946 946 947 947 * ((( 948 948 ((( 949 -(% style="color:#4f81bd" %)** Commands special design for L LDS12**936 +(% style="color:#4f81bd" %)** Commands special design for LDDS75** 950 950 ))) 951 951 ))) 952 952 953 953 ((( 954 954 ((( 955 -These commands only valid for L LDS12, as below:942 +These commands only valid for LDDS75, as below: 956 956 ))) 957 957 ))) 958 958 959 959 960 960 961 -== 4.1SetTransmitInterval Time==948 +== 3.1 Access AT Commands == 962 962 963 - Feature:ChangeLoRaWANEndNode TransmitInterval.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. 964 964 965 - (% style="color:#037691"%)**AT Command: AT+TDC**952 +[[image:image-20220610172924-4.png||height="483" width="988"]] 966 966 967 -[[image:image-20220607171554-8.png]] 968 968 955 +Or if you have below board, use below connection: 969 969 970 -((( 971 -(% style="color:#037691" %)**Downlink Command: 0x01** 972 -))) 973 973 974 -((( 975 -Format: Command Code (0x01) followed by 3 bytes time value. 976 -))) 958 +[[image:image-20220610172924-5.png]] 977 977 978 -((( 979 -If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01. 980 -))) 981 981 982 -* ((( 983 -Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds 984 -))) 985 -* ((( 986 -Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds 987 -))) 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: 988 988 989 -== 4.2 Set Interrupt Mode == 990 990 991 - Feature, Set Interruptmode for GPIO_EXIT.964 + [[image:image-20220610172924-6.png||height="601" width="860"]] 992 992 993 -(% style="color:#037691" %)**AT Command: AT+INTMOD** 994 994 995 -[[image:image-20220610105806-2.png]] 996 996 968 +== 3.2 Set Transmit Interval Time == 997 997 970 +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 + 998 998 ((( 999 999 (% style="color:#037691" %)**Downlink Command: 0x06** 1000 1000 ))) ... ... @@ -1014,7 +1014,7 @@ 1014 1014 Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger 1015 1015 ))) 1016 1016 1017 -== 4.3 Get Firmware Version Info ==998 +== 3.3 Get Firmware Version Info == 1018 1018 1019 1019 Feature: use downlink to get firmware version. 1020 1020
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