Summary

• Page properties (1 modified, 0 added, 0 removed)
• Attachments (0 modified, 4 added, 0 removed)
  • image-20220610172924-4.png
  • image-20220610172924-5.png
  • image-20220610172924-6.png
  • image-20220610173409-7.png

Details

Page properties

Content

...	...	@@ -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 ===
...	...	@@ -100,7 +100,6 @@
100	100	* Bottom water level monitoring
101	101
102	102
103		-
104	104	== 1.6  Pin mapping and power on ==
105	105
106	106
...	...	@@ -242,7 +242,6 @@
242	242	* 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.
243	243
244	244
245		-
246	246	=== 2.3.3  Interrupt Pin ===
247	247
248	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.
...	...	@@ -813,7 +813,6 @@
813	813	* Blink once when device transmit a packet.
814	814
815	815
816		-
817	817	== 2.8  ​Firmware Change Log ==
818	818
819	819
...	...	@@ -832,7 +832,7 @@
832	832	[[image:image-20220610172003-2.png]]
833	833
834	834
835		-== 2.10  Battery Analysis  ==
	831	+== 2.10  Battery Analysis ==
836	836
837	837	=== 2.10.1  Battery Type ===
838	838
...	...	@@ -854,73 +854,30 @@
854	854	[[image:image-20220610172400-3.png]]
855	855
856	856
857		-= 3.  LiDAR ToF Measurement =
858	858
859		-== 3.1 Principle of Distance Measurement ==
	854	+=== 2.10.2  Replace the battery ===
860	860
861		-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.
862		-
863		-[[image:1654831757579-263.png]]
864		-
865		-
866		-
867		-== 3.2 Distance Measurement Characteristics ==
868		-
869		-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:
870		-
871		-[[image:1654831774373-275.png]]
872		-
873		-
874	874	(((
875		-(% style="color:blue" %)**① **(%%)Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output data is unreliable.
	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.
876	876	)))
877	877
878	878	(((
879		-(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
	861	+
880	880	)))
881	881
882	882	(((
883		-(% style="color:blue" %)**③ **(%%)Represents the operating range of The LiDAR probe detecting white target with 90% reflectivity, 0.1-12m.
	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)
884	884	)))
885	885
886	886
887		-(((
888		-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:
889		-)))
890	890
	870	+= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
891	891
892		-[[image:1654831797521-720.png]]
893		-
894		-
895	895	(((
896		-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.
897		-)))
898		-
899		-[[image:1654831810009-716.png]]
900		-
901		-
902	902	(((
903		-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.
	874	+Use can configure LDDS75 via AT Command or LoRaWAN Downlink.
904	904	)))
905		-
906		-
907		-
908		-== 3.3 Notice of usage: ==
909		-
910		-Possible invalid /wrong reading for LiDAR ToF tech:
911		-
912		-* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
913		-* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
914		-* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
915		-* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
916		-
917		-= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
918		-
919		-(((
920		-(((
921		-Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
922	922	)))
923		-)))
924	924
925	925	* (((
926	926	(((
...	...	@@ -939,7 +939,7 @@
939	939	)))
940	940
941	941	(((
942		-There are two kinds of commands to configure LLDS12, they are:
	895	+There are two kinds of commands to configure LDDS75, they are:
943	943	)))
944	944	)))
945	945
...	...	@@ -980,55 +980,49 @@
980	980
981	981	* (((
982	982	(((
983		-(% style="color:#4f81bd" %)** Commands special design for LLDS12**
	936	+(% style="color:#4f81bd" %)** Commands special design for LDDS75**
984	984	)))
985	985	)))
986	986
987	987	(((
988	988	(((
989		-These commands only valid for LLDS12, as below:
	942	+These commands only valid for LDDS75, as below:
990	990	)))
991	991	)))
992	992
993	993
994	994
995		-== 4.1  Set Transmit Interval Time ==
	948	+== 3.1  Access AT Commands ==
996	996
997		-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.
998	998
999		-(% style="color:#037691" %)**AT Command: AT+TDC**
	952	+[[image:image-20220610172924-4.png||height="483" width="988"]]
1000	1000
1001		-[[image:image-20220607171554-8.png]]
1002	1002
	955	+Or if you have below board, use below connection:
1003	1003
1004		-(((
1005		-(% style="color:#037691" %)**Downlink Command: 0x01**
1006		-)))
1007	1007
1008		-(((
1009		-Format: Command Code (0x01) followed by 3 bytes time value.
1010		-)))
	958	+[[image:image-20220610172924-5.png]]
1011	1011
1012		-(((
1013		-If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1014		-)))
1015	1015
1016		-* (((
1017		-Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1018		-)))
1019		-* (((
1020		-Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1021		-)))
	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:
1022	1022
1023		-== 4.2  Set Interrupt Mode ==
1024	1024
1025		-Feature, Set Interrupt mode for GPIO_EXIT.
	964	+ [[image:image-20220610172924-6.png||height="601" width="860"]]
1026	1026
1027		-(% style="color:#037691" %)**AT Command: AT+INTMOD**
1028	1028
1029		-[[image:image-20220610105806-2.png]]
1030	1030
	968	+== 3.2  Set Transmit Interval Time ==
1031	1031
	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	+
1032	1032	(((
1033	1033	(% style="color:#037691" %)**Downlink Command: 0x06**
1034	1034	)))
...	...	@@ -1048,7 +1048,7 @@
1048	1048	Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1049	1049	)))
1050	1050
1051		-== 4.3  Get Firmware Version Info ==
	998	+== 3.3  Get Firmware Version Info ==
1052	1052
1053	1053	Feature: use downlink to get firmware version.
1054	1054

image-20220610172924-4.png

Author

...	...	@@ -1,0 +1,1 @@
	1	+XWiki.Xiaoling

Size

...	...	@@ -1,0 +1,1 @@
	1	+1.5 MB

Content

image-20220610172924-5.png

Author

...	...	@@ -1,0 +1,1 @@
	1	+XWiki.Xiaoling

Size

...	...	@@ -1,0 +1,1 @@
	1	+901.4 KB

Content

image-20220610172924-6.png

Author

...	...	@@ -1,0 +1,1 @@
	1	+XWiki.Xiaoling

Size

...	...	@@ -1,0 +1,1 @@
	1	+68.6 KB

Content

image-20220610173409-7.png

Author

...	...	@@ -1,0 +1,1 @@
	1	+XWiki.Xiaoling

Size

...	...	@@ -1,0 +1,1 @@
	1	+11.8 KB

Content