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1	1	(% style="text-align:center" %)
2	2	[[image:1654846127817-788.png]]
3	3
	4	+**Contents:**
4	4
5		-
6		-
7		-
8		-**Table of Contents:**
9		-
10	10	{{toc/}}
11	11
12	12
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29	29	)))
30	30
31	31	(((
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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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34	34
35	35	(((
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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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38	38
39	39	(((
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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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43	43	(((
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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
72	72
73		-
74		-
75	75	== 1.3  Specification ==
76	76
77	77	=== 1.3.1  Rated environmental conditions ===
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79	79	[[image:image-20220610154839-1.png]]
80	80
81	81	(((
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)**
	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)**
85	85	)))
86	86
87	87
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117	117	* Sewer
118	118	* Bottom water level monitoring
119	119
120		-
121		-
122	122	== 1.6  Pin mapping and power on ==
123	123
124	124
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155	155	)))
156	156
157	157	(((
158		-
159		-
160	160	(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
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162	162
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176	176	)))
177	177
178	178	(((
179		-
180		-
181	181	**Add APP EUI in the application**
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183	183
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278	278	* 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.
279	279
280	280
281		-
282	282	=== 2.3.3  Interrupt Pin ===
283	283
284	284	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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1013	1013	[[image:image-20220610172924-5.png]]
1014	1014
1015	1015
1016		-(((
1017	1017	In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
1018		-)))
1019	1019
1020	1020
1021	1021	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1039	1039	(((
1040	1040	Format: Command Code (0x01) followed by 3 bytes time value.
1041	1041
1042		-(((
1043	1043	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1044		-)))
1045	1045
1046	1046	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1047	1047	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1049		-)))
1050	1050
1051	1051
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1052	1052
1053		-
1054		-
1055	1055	== 3.3  Set Interrupt Mode ==
1056	1056
1057	1057	Feature, Set Interrupt mode for GPIO_EXIT.
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1065	1065
1066	1066	Format: Command Code (0x06) followed by 3 bytes.
1067	1067
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1069	1069	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
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1071	1071
1072	1072	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1073	1073	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1074	1074
1075		-
1076		-
1077	1077	= 4.  FAQ =
1078	1078
1079	1079	== 4.1  What is the frequency plan for LDDS75? ==
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1133	1133	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1134	1134	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1135	1135
1136		-
1137		-
1138	1138	= 7. ​ Packing Info =
1139	1139
1140	1140
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1149	1149	* Package Size / pcs : cm
1150	1150	* Weight / pcs : g
1151	1151
1152		-
1153		-
1154	1154	= 8.  ​Support =
1155	1155
1156	1156	* 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.