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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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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)**
101	101	)))
102	102
103	103
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135	135
136	136
137	137
138		-
139		-
140	140	== 1.6  Pin mapping and power on ==
141	141
142	142
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173	173	)))
174	174
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	)))
178	178
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192	192	)))
193	193
194	194	(((
	179	+
	180	+
195	195	**Add APP EUI in the application**
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197	197
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291	291	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
292	292	* 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.
293	293
	280	+
	281	+
294	294	=== 2.3.3  Interrupt Pin ===
295	295
296	296	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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866	866	* Solid ON for 5 seconds once device successful Join the network.
867	867	* Blink once when device transmit a packet.
868	868
	857	+
	858	+
869	869	== 2.8  ​Firmware Change Log ==
870	870
871	871
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1056	1056	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1057	1057	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1058	1058	)))
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1059	1059
1060	1060
1061		-
1062		-)))
1063	1063
	1053	+
	1054	+
1064	1064	== 3.3  Set Interrupt Mode ==
1065	1065
1066	1066	Feature, Set Interrupt mode for GPIO_EXIT.
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1082	1082	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1083	1083
1084	1084
	1076	+
1085	1085	= 4.  FAQ =
1086	1086
1087	1087	== 4.1  What is the frequency plan for LDDS75? ==
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1142	1142	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1143	1143
1144	1144
	1137	+
1145	1145	= 7. ​ Packing Info =
1146	1146
1147	1147
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1157	1157	* Weight / pcs : g
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	1153	+
1160	1160	= 8.  ​Support =
1161	1161
1162	1162	* 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.