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1	1	(% style="text-align:center" %)
2	2	[[image:1654846127817-788.png]]
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	4	+**Contents:**
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5		-
6		-
7		-
8		-**Table of Contents:**
9		-
10	10	{{toc/}}
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29	29	)))
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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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36	36	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.
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40	40	LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
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44	44	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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48	48	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
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70	70	* IP66 Waterproof Enclosure
71	71	* 4000mAh or 8500mAh Battery for long term use
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73		-
74		-
75	75	== 1.3  Specification ==
76	76
77	77	=== 1.3.1  Rated environmental conditions ===
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115	115	* Sewer
116	116	* Bottom water level monitoring
117	117
118		-
119		-
120	120	== 1.6  Pin mapping and power on ==
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272	272	* 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.
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274	274
275		-
276	276	=== 2.3.3  Interrupt Pin ===
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278	278	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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1040	1040	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1041	1041	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1047		-
1048		-
1049	1049	== 3.3  Set Interrupt Mode ==
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1051	1051	Feature, Set Interrupt mode for GPIO_EXIT.
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1071	1071	= 4.  FAQ =
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1073	1073	== 4.1  What is the frequency plan for LDDS75? ==
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1132	1132	= 7. ​ Packing Info =
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1148	1148	= 8.  ​Support =
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1150	1150	* 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.