Last modified by Xiaoling on 2025/04/27 16:45
<
From version < 150.20 >
edited by Xiaoling
on 2022/06/11 08:50
To version < 140.10 >
edited by Xiaoling
on 2022/06/10 17:15
>
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Summary

Details

Page properties
Content
... ... @@ -3,7 +3,6 @@
3 3  
4 4  **Contents:**
5 5  
6 -{{toc/}}
7 7  
8 8  
9 9  
... ... @@ -11,7 +11,6 @@
11 11  
12 12  
13 13  
14 -
15 15  = 1.  Introduction =
16 16  
17 17  == 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
... ... @@ -35,7 +35,7 @@
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.
36 36  
37 37  
38 -(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
36 +(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors
39 39  )))
40 40  )))
41 41  
... ... @@ -60,6 +60,7 @@
60 60  * 4000mAh or 8500mAh Battery for long term use
61 61  
62 62  
61 +
63 63  == 1.3  Specification ==
64 64  
65 65  === 1.3.1  Rated environmental conditions ===
... ... @@ -81,7 +81,6 @@
81 81  [[image:1654852253176-749.png]]
82 82  
83 83  
84 -
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.**
86 86  
87 87  
... ... @@ -211,12 +211,12 @@
211 211  **Size (bytes)**
212 212  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
213 213  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
214 -[[Distance>>||anchor="H2.3.2A0Distance"]]
212 +[[Distance>>||anchor="H2.3.3A0Distance"]]
215 215  
216 216  (unit: mm)
217 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
218 -[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
219 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
215 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
216 +[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
217 +)))|[[Sensor Flag>>path:#Sensor_Flag]]
220 220  
221 221  [[image:1654850511545-399.png]]
222 222  
... ... @@ -245,10 +245,9 @@
245 245  
246 246  
247 247  
248 -
249 249  === 2.3.3  Interrupt Pin ===
250 250  
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.
248 +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.
252 252  
253 253  **Example:**
254 254  
... ... @@ -279,9 +279,9 @@
279 279  0x00: No Ultrasonic Sensor
280 280  
281 281  
279 +===
280 +(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
282 282  
283 -=== 2.3.6  Decode payload in The Things Network ===
284 -
285 285  While using TTN network, you can add the payload format to decode the payload.
286 286  
287 287  
... ... @@ -807,18 +807,15 @@
807 807  
808 808  == 2.7  LED Indicator ==
809 809  
810 -The LDDS75 has an internal LED which is to show the status of different state.
807 +The LLDS12 has an internal LED which is to show the status of different state.
811 811  
812 -
813 -* Blink once when device power on.
814 -* The device detects the sensor and flashes 5 times.
815 -* Solid ON for 5 seconds once device successful Join the network.
809 +* The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
816 816  * Blink once when device transmit a packet.
817 817  
818 818  == 2.8  ​Firmware Change Log ==
819 819  
820 820  
821 -**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 +**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/]]
822 822  
823 823  
824 824  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
... ... @@ -825,58 +825,71 @@
825 825  
826 826  
827 827  
828 -== 2.9  Mechanical ==
822 += 3.  LiDAR ToF Measurement =
829 829  
824 +== 3.1 Principle of Distance Measurement ==
830 830  
831 -[[image:image-20220610172003-1.png]]
826 +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.
832 832  
833 -[[image:image-20220610172003-2.png]]
828 +[[image:1654831757579-263.png]]
834 834  
835 835  
836 -== 2.10  Battery Analysis ==
837 837  
838 -=== 2.10.1  Battery Type ===
832 +== 3.2 Distance Measurement Characteristics ==
839 839  
840 -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 +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:
841 841  
836 +[[image:1654831774373-275.png]]
842 842  
843 -The battery related documents as below:
844 844  
845 -* (((
846 -[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
839 +(((
840 +(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
847 847  )))
848 -* (((
849 -[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
842 +
843 +(((
844 +(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
850 850  )))
851 -* (((
852 -[[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]]
846 +
847 +(((
848 +(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
853 853  )))
854 854  
855 - [[image:image-20220610172400-3.png]]
856 856  
852 +(((
853 +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:
854 +)))
857 857  
858 858  
859 -=== 2.10.2  Replace the battery ===
857 +[[image:1654831797521-720.png]]
860 860  
861 -(((
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.
863 -)))
864 864  
865 865  (((
866 -
861 +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.
867 867  )))
868 868  
864 +[[image:1654831810009-716.png]]
865 +
866 +
869 869  (((
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)
868 +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.
871 871  )))
872 872  
873 873  
874 874  
875 -= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
873 +== 3.3 Notice of usage: ==
876 876  
875 +Possible invalid /wrong reading for LiDAR ToF tech:
876 +
877 +* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
878 +* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
879 +* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
880 +* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
881 +
882 += 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
883 +
877 877  (((
878 878  (((
879 -Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
886 +Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
880 880  )))
881 881  )))
882 882  
... ... @@ -897,7 +897,7 @@
897 897  )))
898 898  
899 899  (((
900 -There are two kinds of commands to configure LDDS75, they are:
907 +There are two kinds of commands to configure LLDS12, they are:
901 901  )))
902 902  )))
903 903  
... ... @@ -938,148 +938,351 @@
938 938  
939 939  * (((
940 940  (((
941 -(% style="color:#4f81bd" %)** Commands special design for LDDS75**
948 +(% style="color:#4f81bd" %)** Commands special design for LLDS12**
942 942  )))
943 943  )))
944 944  
945 945  (((
946 946  (((
947 -These commands only valid for LDDS75, as below:
954 +These commands only valid for LLDS12, as below:
948 948  )))
949 949  )))
950 950  
951 951  
952 952  
953 -== 3.1  Access AT Commands ==
960 +== 4.1  Set Transmit Interval Time ==
954 954  
955 -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 +Feature: Change LoRaWAN End Node Transmit Interval.
956 956  
957 -[[image:image-20220610172924-4.png||height="483" width="988"]]
964 +(% style="color:#037691" %)**AT Command: AT+TDC**
958 958  
966 +[[image:image-20220607171554-8.png]]
959 959  
960 -Or if you have below board, use below connection:
961 961  
969 +(((
970 +(% style="color:#037691" %)**Downlink Command: 0x01**
971 +)))
962 962  
963 -[[image:image-20220610172924-5.png]]
973 +(((
974 +Format: Command Code (0x01) followed by 3 bytes time value.
975 +)))
964 964  
977 +(((
978 +If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
979 +)))
965 965  
966 -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:
981 +* (((
982 +Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
983 +)))
984 +* (((
985 +Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
986 +)))
967 967  
988 +== 4.2  Set Interrupt Mode ==
968 968  
969 - [[image:image-20220610172924-6.png||height="601" width="860"]]
990 +Feature, Set Interrupt mode for GPIO_EXIT.
970 970  
992 +(% style="color:#037691" %)**AT Command: AT+INTMOD**
971 971  
994 +[[image:image-20220610105806-2.png]]
972 972  
973 -== 3.2  Set Transmit Interval Time ==
974 974  
975 -Feature: Change LoRaWAN End Node Transmit Interval.
997 +(((
998 +(% style="color:#037691" %)**Downlink Command: 0x06**
999 +)))
976 976  
977 -(% style="color:#037691" %)**AT Command: AT+TDC**
1001 +(((
1002 +Format: Command Code (0x06) followed by 3 bytes.
1003 +)))
978 978  
979 -[[image:image-20220610173409-7.png]]
1005 +(((
1006 +This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1007 +)))
980 980  
1009 +* (((
1010 +Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1011 +)))
1012 +* (((
1013 +Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1014 +)))
981 981  
1016 +== 4.3  Get Firmware Version Info ==
1017 +
1018 +Feature: use downlink to get firmware version.
1019 +
1020 +(% style="color:#037691" %)**Downlink Command: 0x26**
1021 +
1022 +[[image:image-20220607171917-10.png]]
1023 +
1024 +* Reply to the confirmation package: 26 01
1025 +* Reply to non-confirmed packet: 26 00
1026 +
1027 +Device will send an uplink after got this downlink command. With below payload:
1028 +
1029 +Configures info payload:
1030 +
1031 +(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
1032 +|=(((
1033 +**Size(bytes)**
1034 +)))|=**1**|=**1**|=**1**|=**1**|=**1**|=**5**|=**1**
1035 +|**Value**|Software Type|(((
1036 +Frequency
1037 +
1038 +Band
1039 +)))|Sub-band|(((
1040 +Firmware
1041 +
1042 +Version
1043 +)))|Sensor Type|Reserve|(((
1044 +[[Message Type>>||anchor="H2.3.7A0MessageType"]]
1045 +Always 0x02
1046 +)))
1047 +
1048 +**Software Type**: Always 0x03 for LLDS12
1049 +
1050 +
1051 +**Frequency Band**:
1052 +
1053 +*0x01: EU868
1054 +
1055 +*0x02: US915
1056 +
1057 +*0x03: IN865
1058 +
1059 +*0x04: AU915
1060 +
1061 +*0x05: KZ865
1062 +
1063 +*0x06: RU864
1064 +
1065 +*0x07: AS923
1066 +
1067 +*0x08: AS923-1
1068 +
1069 +*0x09: AS923-2
1070 +
1071 +*0xa0: AS923-3
1072 +
1073 +
1074 +**Sub-Band**: value 0x00 ~~ 0x08
1075 +
1076 +
1077 +**Firmware Version**: 0x0100, Means: v1.0.0 version
1078 +
1079 +
1080 +**Sensor Type**:
1081 +
1082 +0x01: LSE01
1083 +
1084 +0x02: LDDS75
1085 +
1086 +0x03: LDDS20
1087 +
1088 +0x04: LLMS01
1089 +
1090 +0x05: LSPH01
1091 +
1092 +0x06: LSNPK01
1093 +
1094 +0x07: LLDS12
1095 +
1096 +
1097 +
1098 += 5.  Battery & How to replace =
1099 +
1100 +== 5.1  Battery Type ==
1101 +
982 982  (((
983 -(% style="color:#037691" %)**Downlink Command: 0x01**
1103 +LLDS12 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.
984 984  )))
985 985  
986 986  (((
1107 +The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
1108 +)))
1109 +
1110 +[[image:1654593587246-335.png]]
1111 +
1112 +
1113 +Minimum Working Voltage for the LLDS12:
1114 +
1115 +LLDS12:  2.45v ~~ 3.6v
1116 +
1117 +
1118 +
1119 +== 5.2  Replace Battery ==
1120 +
987 987  (((
988 -Format: Command Code (0x01) followed by 3 bytes time value.
1122 +Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
1123 +)))
989 989  
990 -If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1125 +(((
1126 +And make sure the positive and negative pins match.
1127 +)))
991 991  
992 -* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
993 -* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1129 +
1130 +
1131 +== 5.3  Power Consumption Analyze ==
1132 +
1133 +(((
1134 +Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
994 994  )))
995 995  
1137 +(((
1138 +Instruction to use as below:
1139 +)))
996 996  
997 -
1141 +
1142 +**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
1143 +
1144 +[[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
1145 +
1146 +
1147 +**Step 2**: Open it and choose
1148 +
1149 +* Product Model
1150 +* Uplink Interval
1151 +* Working Mode
1152 +
1153 +And the Life expectation in difference case will be shown on the right.
1154 +
1155 +[[image:1654593605679-189.png]]
1156 +
1157 +
1158 +The battery related documents as below:
1159 +
1160 +* (((
1161 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
998 998  )))
1163 +* (((
1164 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1165 +)))
1166 +* (((
1167 +[[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]]
1168 +)))
999 999  
1000 -== 3.3  Set Interrupt Mode ==
1170 +[[image:image-20220607172042-11.png]]
1001 1001  
1002 -Feature, Set Interrupt mode for GPIO_EXIT.
1003 1003  
1004 -(% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1005 1005  
1006 -[[image:image-20220610174917-9.png]]
1174 +=== 5.3.1  ​Battery Note ===
1007 1007  
1176 +(((
1177 +The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
1178 +)))
1008 1008  
1009 -(% style="color:#037691" %)**Downlink Command: 0x06**
1010 1010  
1011 -Format: Command Code (0x06) followed by 3 bytes.
1012 1012  
1013 -This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1182 +=== ​5.3.2  Replace the battery ===
1014 1014  
1015 -* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1016 -* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1184 +(((
1185 +You can change the battery in the LLDS12.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.
1186 +)))
1017 1017  
1018 -= 4.  FAQ =
1188 +(((
1189 +The default battery pack of LLDS12 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 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)
1190 +)))
1019 1019  
1020 -== 4.1  What is the frequency plan for LDDS75? ==
1021 1021  
1022 -LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:  [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]
1023 1023  
1194 += 6.  Use AT Command =
1024 1024  
1196 +== 6.1  Access AT Commands ==
1025 1025  
1026 -== 4.2  How to change the LoRa Frequency Bands/Region ==
1198 +LLDS12 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LLDS12 for using AT command, as below.
1027 1027  
1028 -You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1029 -When downloading the images, choose the required image file for download. ​
1200 +[[image:1654593668970-604.png]]
1030 1030  
1202 +**Connection:**
1031 1031  
1204 +(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1032 1032  
1033 -== 4.3  Can I use LDDS75 in condensation environment? ==
1206 +(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1034 1034  
1035 -LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1208 +(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1036 1036  
1037 1037  
1211 +(((
1212 +(((
1213 +In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
1214 +)))
1038 1038  
1039 -= 5.  Trouble Shooting =
1216 +(((
1217 +LLDS12 will output system info once power on as below:
1218 +)))
1219 +)))
1040 1040  
1041 -== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1042 1042  
1043 -It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1222 + [[image:1654593712276-618.png]]
1044 1044  
1224 +Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1045 1045  
1046 -== 5.2  AT Command input doesn't work ==
1047 1047  
1227 += 7.  FAQ =
1228 +
1229 +== 7.1  How to change the LoRa Frequency Bands/Region ==
1230 +
1231 +You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1232 +When downloading the images, choose the required image file for download. ​
1233 +
1234 +
1235 += 8.  Trouble Shooting =
1236 +
1237 +== 8.1  AT Commands input doesn’t work ==
1238 +
1239 +
1240 +(((
1048 1048  In the case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1242 +)))
1049 1049  
1244 +
1245 +== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
1246 +
1247 +
1050 1050  (((
1249 +(% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance (such as glass and water, etc.)
1250 +)))
1251 +
1252 +(((
1253 +Troubleshooting: Please avoid use of this product under such circumstance in practice.
1254 +)))
1255 +
1256 +(((
1051 1051  
1052 1052  )))
1053 1053  
1260 +(((
1261 +(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
1262 +)))
1054 1054  
1055 -= 6.  Order Info =
1264 +(((
1265 +Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1266 +)))
1056 1056  
1057 1057  
1058 -Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1059 1059  
1270 += 9.  Order Info =
1060 1060  
1061 -(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1062 1062  
1063 -* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1064 -* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1065 -* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1066 -* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1067 -* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1068 -* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1069 -* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1070 -* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1273 +Part Number: (% style="color:blue" %)**LLDS12-XX**
1071 1071  
1072 -(% style="color:blue" %)**YY**(%%): Battery Option
1073 1073  
1074 -* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1075 -* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1276 +(% style="color:blue" %)**XX**(%%): The default frequency band
1076 1076  
1077 -= 7. ​ Packing Info =
1278 +* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
1279 +* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1280 +* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1281 +* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1282 +* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1283 +* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1284 +* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1285 +* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1078 1078  
1287 += 10. ​ Packing Info =
1079 1079  
1289 +
1080 1080  **Package Includes**:
1081 1081  
1082 -* LDDS75 LoRaWAN Distance Detection Sensor x 1
1292 +* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
1083 1083  
1084 1084  **Dimension and weight**:
1085 1085  
... ... @@ -1088,7 +1088,7 @@
1088 1088  * Package Size / pcs : cm
1089 1089  * Weight / pcs : g
1090 1090  
1091 -= 8.  ​Support =
1301 += 11.  ​Support =
1092 1092  
1093 1093  * 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.
1094 1094  * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].
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