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1	1	(% style="text-align:center" %)
2	2	[[image:1654846127817-788.png]]
3	3
4		-**Contents:**
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	7	+
	8	+**Table of Contents:**
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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.
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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.
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58	58
59	59	(((
60		-
61		-)))
62		-
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64	64	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
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66	66	)))
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88	88
89	89
90	90
91		-
92		-
93	93	== 1.3  Specification ==
94	94
95	95	=== 1.3.1  Rated environmental conditions ===
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97	97	[[image:image-20220610154839-1.png]]
98	98
99	99	(((
100		-**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)**
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137	137
138		-
139		-
140	140	== 1.6  Pin mapping and power on ==
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173	173	)))
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175	175	(((
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176	176	(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
177	177	)))
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192	192	)))
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	180	+
195	195	**Add APP EUI in the application**
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295	295
296		-
297		-
298	298	=== 2.3.3  Interrupt Pin ===
299	299
300	300	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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872	872
873	873
874	874
875		-
876		-
877	877	== 2.8  ​Firmware Change Log ==
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879	879
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1064	1064	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1065	1065	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1067		-
1068		-
1069		-
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1094	1094	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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	1076	+
1097	1097	= 4.  FAQ =
1098	1098
1099	1099	== 4.1  What is the frequency plan for LDDS75? ==
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1154	1154	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1157	1157	= 7. ​ Packing Info =
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1169	1169	* Weight / pcs : g
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1172	1172	= 8.  ​Support =
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1174	1174	* 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.