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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/}}
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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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86	86	* IP66 Waterproof Enclosure
87	87	* 4000mAh or 8500mAh Battery for long term use
88	88
	73	+
	74	+
89	89	== 1.3  Specification ==
90	90
91	91	=== 1.3.1  Rated environmental conditions ===
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93	93	[[image:image-20220610154839-1.png]]
94	94
95	95	(((
96		-**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)**
97	97	)))
98	98
99	99
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129	129	* Sewer
130	130	* Bottom water level monitoring
131	131
	120	+
	121	+
132	132	== 1.6  Pin mapping and power on ==
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134	134
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165	165	)))
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167	167	(((
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168	168	(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
169	169	)))
170	170
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184	184	)))
185	185
186	186	(((
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187	187	**Add APP EUI in the application**
188	188	)))
189	189
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284	284	* 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.
285	285
286	286
	281	+
287	287	=== 2.3.3  Interrupt Pin ===
288	288
289	289	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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1051	1051	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1052	1052	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1053	1053	)))
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1054	1054
1055	1055
1056		-
1057		-)))
1058	1058
	1053	+
	1054	+
1059	1059	== 3.3  Set Interrupt Mode ==
1060	1060
1061	1061	Feature, Set Interrupt mode for GPIO_EXIT.
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1078	1078
1079	1079
1080	1080
1081		-
1082	1082	= 4.  FAQ =
1083	1083
1084	1084	== 4.1  What is the frequency plan for LDDS75? ==
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1140	1140
1141	1141
1142	1142
1143		-
1144	1144	= 7. ​ Packing Info =
1145	1145
1146	1146
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1157	1157
1158	1158
1159	1159
1160		-
1161	1161	= 8.  ​Support =
1162	1162
1163	1163	* 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.