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1	1	(% style="text-align:center" %)
2	2	[[image:1654846127817-788.png]]
3	3
4		-**Contents:**
5	5
	5	+
	6	+
	7	+
	8	+**Table of Contents:**
	9	+
6	6	{{toc/}}
7	7
8	8
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25	25	)))
26	26
27	27	(((
28		-
29		-)))
30		-
31		-(((
32	32	It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
33	33	)))
34	34
35	35	(((
36		-
37		-)))
38		-
39		-(((
40	40	The LoRa wireless technology used in LDDS75 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
41	41	)))
42	42
43	43	(((
44		-
45		-)))
46		-
47		-(((
48	48	LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
49	49	)))
50	50
51	51	(((
52		-
53		-)))
54		-
55		-(((
56	56	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.
57	57	)))
58	58
59	59	(((
60		-
61		-)))
62		-
63		-(((
64	64	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
65	65	)))
66	66	)))
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87	87	* 4000mAh or 8500mAh Battery for long term use
88	88
89	89
	74	+
90	90	== 1.3  Specification ==
91	91
92	92	=== 1.3.1  Rated environmental conditions ===
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94	94	[[image:image-20220610154839-1.png]]
95	95
96	96	(((
97		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
	82	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  **
	83	+
	84	+**~ b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
98	98	)))
99	99
100	100
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168	168	)))
169	169
170	170	(((
	158	+
	159	+
171	171	(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
172	172	)))
173	173
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187	187	)))
188	188
189	189	(((
	179	+
	180	+
190	190	**Add APP EUI in the application**
191	191	)))
192	192
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274	274
275	275	=== 2.3.2  Distance ===
276	276
	268	+(((
277	277	Get the distance. Flat object range 280mm - 7500mm.
	270	+)))
278	278
	272	+(((
279	279	For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
	274	+)))
280	280
281	281
282	282	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
283	283	* 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.
284	284
	280	+
	281	+
285	285	=== 2.3.3  Interrupt Pin ===
286	286
287	287	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.
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310	310
311	311	=== 2.3.5  Sensor Flag ===
312	312
	310	+(((
313	313	0x01: Detect Ultrasonic Sensor
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314	314
	314	+(((
315	315	0x00: No Ultrasonic Sensor
	316	+)))
316	316
317	317
318	318
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325	325
326	326	The payload decoder function for TTN V3 is here:
327	327
	329	+(((
328	328	LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
	331	+)))
329	329
330	330
331	331
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851	851	* Solid ON for 5 seconds once device successful Join the network.
852	852	* Blink once when device transmit a packet.
853	853
	857	+
	858	+
854	854	== 2.8  ​Firmware Change Log ==
855	855
856	856
	862	+(((
857	857	**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/]]
	864	+)))
858	858
	866	+(((
	867	+
	868	+)))
859	859
	870	+(((
860	860	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
	872	+)))
861	861
862	862
863	863
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1001	1001	[[image:image-20220610172924-5.png]]
1002	1002
1003	1003
	1016	+(((
1004	1004	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:
	1018	+)))
1005	1005
1006	1006
1007	1007	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1025	1025	(((
1026	1026	Format: Command Code (0x01) followed by 3 bytes time value.
1027	1027
	1042	+(((
1028	1028	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
	1044	+)))
1029	1029
1030	1030	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1031	1031	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1032	1032	)))
	1049	+)))
1033	1033
1034	1034
1035		-
1036		-)))
1037	1037
	1053	+
	1054	+
1038	1038	== 3.3  Set Interrupt Mode ==
1039	1039
1040	1040	Feature, Set Interrupt mode for GPIO_EXIT.
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1048	1048
1049	1049	Format: Command Code (0x06) followed by 3 bytes.
1050	1050
	1068	+(((
1051	1051	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
	1070	+)))
1052	1052
1053	1053	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1054	1054	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1055	1055
	1075	+
	1076	+
1056	1056	= 4.  FAQ =
1057	1057
1058	1058	== 4.1  What is the frequency plan for LDDS75? ==
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1112	1112	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1113	1113	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1114	1114
	1136	+
	1137	+
1115	1115	= 7. ​ Packing Info =
1116	1116
1117	1117
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1126	1126	* Package Size / pcs : cm
1127	1127	* Weight / pcs : g
1128	1128
	1152	+
	1153	+
1129	1129	= 8.  ​Support =
1130	1130
1131	1131	* 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.