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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
...	...	@@ -857,80 +857,27 @@
857	857
858	858	=== 2.10.2  Replace the battery ===
859	859
860		-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.
861		-
862		-
863		-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)
864		-
865		-
866		-
867		-= 3.  LiDAR ToF Measurement =
868		-
869		-== 3.1 Principle of Distance Measurement ==
870		-
871		-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.
872		-
873		-[[image:1654831757579-263.png]]
874		-
875		-
876		-
877		-== 3.2 Distance Measurement Characteristics ==
878		-
879		-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:
880		-
881		-[[image:1654831774373-275.png]]
882		-
883		-
884	884	(((
885		-(% 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.
886	886	)))
887	887
888	888	(((
889		-(% style="color:blue" %)**② **(%%)Represents the operating range of The LiDAR probe detecting black target with 10% reflectivity, 0.1-5m.
	861	+
890	890	)))
891	891
892	892	(((
893		-(% 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)
894	894	)))
895	895
896	896
897		-(((
898		-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:
899		-)))
900	900
	870	+= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
901	901
902		-[[image:1654831797521-720.png]]
903		-
904		-
905	905	(((
906		-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.
907		-)))
908		-
909		-[[image:1654831810009-716.png]]
910		-
911		-
912	912	(((
913		-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.
914	914	)))
915		-
916		-
917		-
918		-== 3.3 Notice of usage: ==
919		-
920		-Possible invalid /wrong reading for LiDAR ToF tech:
921		-
922		-* Measure high reflectivity object such as: Mirror, Smooth ceramic tile, static milk surface, will have possible wrong readings.
923		-* While there is transparent object such as glass, water drop between the measured object and the LiDAR sensor, the reading might wrong.
924		-* The LiDAR probe is cover by dirty things; the reading might be wrong. In this case, need to clean the probe.
925		-* The sensor window is made by Acrylic. Don’t touch it with alcohol material. This will destroy the sensor window.
926		-
927		-= 4.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
928		-
929		-(((
930		-(((
931		-Use can configure LLDS12 via AT Command or LoRaWAN Downlink.
932	932	)))
933		-)))
934	934
935	935	* (((
936	936	(((
...	...	@@ -949,7 +949,7 @@
949	949	)))
950	950
951	951	(((
952		-There are two kinds of commands to configure LLDS12, they are:
	895	+There are two kinds of commands to configure LDDS75, they are:
953	953	)))
954	954	)))
955	955
...	...	@@ -990,55 +990,49 @@
990	990
991	991	* (((
992	992	(((
993		-(% style="color:#4f81bd" %)** Commands special design for LLDS12**
	936	+(% style="color:#4f81bd" %)** Commands special design for LDDS75**
994	994	)))
995	995	)))
996	996
997	997	(((
998	998	(((
999		-These commands only valid for LLDS12, as below:
	942	+These commands only valid for LDDS75, as below:
1000	1000	)))
1001	1001	)))
1002	1002
1003	1003
1004	1004
1005		-== 4.1  Set Transmit Interval Time ==
	948	+== 3.1  Access AT Commands ==
1006	1006
1007		-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.
1008	1008
1009		-(% style="color:#037691" %)**AT Command: AT+TDC**
	952	+[[image:image-20220610172924-4.png||height="483" width="988"]]
1010	1010
1011		-[[image:image-20220607171554-8.png]]
1012	1012
	955	+Or if you have below board, use below connection:
1013	1013
1014		-(((
1015		-(% style="color:#037691" %)**Downlink Command: 0x01**
1016		-)))
1017	1017
1018		-(((
1019		-Format: Command Code (0x01) followed by 3 bytes time value.
1020		-)))
	958	+[[image:image-20220610172924-5.png]]
1021	1021
1022		-(((
1023		-If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1024		-)))
1025	1025
1026		-* (((
1027		-Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1028		-)))
1029		-* (((
1030		-Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1031		-)))
	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:
1032	1032
1033		-== 4.2  Set Interrupt Mode ==
1034	1034
1035		-Feature, Set Interrupt mode for GPIO_EXIT.
	964	+ [[image:image-20220610172924-6.png||height="601" width="860"]]
1036	1036
1037		-(% style="color:#037691" %)**AT Command: AT+INTMOD**
1038	1038
1039		-[[image:image-20220610105806-2.png]]
1040	1040
	968	+== 3.2  Set Transmit Interval Time ==
1041	1041
	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	+
1042	1042	(((
1043	1043	(% style="color:#037691" %)**Downlink Command: 0x06**
1044	1044	)))
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1058	1058	Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1059	1059	)))
1060	1060
1061		-== 4.3  Get Firmware Version Info ==
	998	+== 3.3  Get Firmware Version Info ==
1062	1062
1063	1063	Feature: use downlink to get firmware version.
1064	1064

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