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1	1	(% style="text-align:center" %)
2	2	[[image:1654846127817-788.png]]
3	3
4		-**Contents:**
5	5
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	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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129	129	* Sewer
130	130	* Bottom water level monitoring
131	131
	118	+
	119	+
132	132	== 1.6  Pin mapping and power on ==
133	133
134	134
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283	283	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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
	274	+
	275	+
286	286	=== 2.3.3  Interrupt Pin ===
287	287
288	288	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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859	859	* Blink once when device transmit a packet.
860	860
861	861
	852	+
862	862	== 2.8  ​Firmware Change Log ==
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864	864
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1049	1049	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1050	1050	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1051	1051	)))
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1052	1052
1053	1053
1054		-
1055		-)))
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1057	1057	== 3.3  Set Interrupt Mode ==
1058	1058
1059	1059	Feature, Set Interrupt mode for GPIO_EXIT.