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Title

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1		-LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
	1	+LDDS75 - LoRaWAN Distance Detection Sensor User Manual

Content

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1	1	(% style="text-align:center" %)
2		-[[image:1655254599445-662.png]]
	2	+[[image:1654846127817-788.png]]
3	3
	4	+**Contents:**
4	4
	6	+{{toc/}}
5	5
6	6
7		-**Table of Contents:**
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9	9
10	10
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11	11
12	12
13	13
14		-
15		-
16	16	= 1.  Introduction =
17	17
18		-== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
	17	+== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
19	19
20	20	(((
21	21
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22	22
23	23	(((
24	24	(((
25		-(((
26		-The Dragino LDDS20 is a (% style="color:#4472c4" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:#4472c4" %)**none-contact method **(%%)to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server
	24	+The Dragino LDDS75 is a (% style="color:#4472c4" %)** LoRaWAN Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:#4472c4" %)** ultrasonic sensing** (%%)technology for distance measurement, and (% style="color:#4472c4" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
27	27	)))
28	28
29	29	(((
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31	31	)))
32	32
33	33	(((
34		-The LDDS20 sensor is installed directly below the container to detect the height of the liquid level. User doesn’t need to open a hole on the container to be tested. The (% style="color:#4472c4" %)**none-contact measurement makes the measurement safety, easier and possible for some strict situation**.
	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.
35	35	)))
36	36
37	37	(((
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39	39	)))
40	40
41	41	(((
42		-LDDS20 uses ultrasonic sensing technology for distance measurement. LDDS20 is of high accuracy to measure various liquid such as: (% style="color:#4472c4" %)**toxic substances**(%%), (% style="color:#4472c4" %)**strong acids**(%%), (% style="color:#4472c4" %)**strong alkalis**(%%) and (% style="color:#4472c4" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
	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.
43	43	)))
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45	45	(((
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47	47	)))
48	48
49	49	(((
50		-The LoRa wireless technology used in LDDS20 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.
	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*.
51	51	)))
52	52
53	53	(((
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55	55	)))
56	56
57	57	(((
58		-LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
	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.
59	59	)))
60	60
61	61	(((
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63	63	)))
64	64
65	65	(((
66		-Each LDDS20 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.
67		-)))
68		-
69		-(((
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71		-)))
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76	76	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77	77	)))
78	78	)))
79	79	)))
80		-)))
81	81
82	82
83	83	[[image:1654847051249-359.png]]
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99	99	* IP66 Waterproof Enclosure
100	100	* 4000mAh or 8500mAh Battery for long term use
101	101
	89	+
	90	+
102	102	== 1.3  Specification ==
103	103
104	104	=== 1.3.1  Rated environmental conditions ===
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106	106	[[image:image-20220610154839-1.png]]
107	107
108	108	(((
109		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
110		-
111		-**~ 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)**
	98	+**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)**
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125	125
126		-(((
127	127	**(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
128		-)))
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130	130
131	131	[[image:1654852175653-550.png]](% style="display:none" %) ** **
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180	180	)))
181	181
182	182	(((
183		-
184		-
185	185	(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
186	186	)))
187	187
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192	192	[[image:image-20220607170145-1.jpeg]]
193	193
194	194
195		-(((
196	196	For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
197		-)))
198	198
199		-(((
200	200	Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
201		-)))
202	202
203		-(((
204		-
205		-
206	206	**Add APP EUI in the application**
207		-)))
208	208
209	209	[[image:image-20220610161353-4.png]]
210	210
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247	247	== 2.3  ​Uplink Payload ==
248	248
249	249	(((
250		-(((
251	251	LDDS75 will uplink payload via LoRaWAN with below payload format:
252		-)))
253	253
254		-(((
255	255	Uplink payload includes in total 4 bytes.
256	256	Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
257	257	)))
258		-)))
259	259
260	260	(((
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290	290
291	291	=== 2.3.2  Distance ===
292	292
293		-(((
294	294	Get the distance. Flat object range 280mm - 7500mm.
295		-)))
296	296
297		-(((
298	298	For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
299		-)))
300	300
301	301
302	302	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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330	330
331	331	=== 2.3.5  Sensor Flag ===
332	332
333		-(((
334	334	0x01: Detect Ultrasonic Sensor
335		-)))
336	336
337		-(((
338	338	0x00: No Ultrasonic Sensor
339		-)))
340	340
341	341
342	342
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349	349
350	350	The payload decoder function for TTN V3 is here:
351	351
352		-(((
353	353	LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
354		-)))
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880	880	== 2.8  ​Firmware Change Log ==
881	881
882	882
883		-(((
884	884	**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
885		-)))
886	886
887		-(((
888		-
889		-)))
890	890
891		-(((
892	892	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
893		-)))
894	894
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896	896
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1034	1034	[[image:image-20220610172924-5.png]]
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1036	1036
1037		-(((
1038	1038	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:
1039		-)))
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1042	1042	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1060	1060	(((
1061	1061	Format: Command Code (0x01) followed by 3 bytes time value.
1062	1062
1063		-(((
1064	1064	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1065		-)))
1066	1066
1067	1067	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1068	1068	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1069	1069	)))
1070		-)))
1071	1071
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	1022	+
	1023	+)))
1073	1073
1074		-
1075		-
1076	1076	== 3.3  Set Interrupt Mode ==
1077	1077
1078	1078	Feature, Set Interrupt mode for GPIO_EXIT.
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1086	1086
1087	1087	Format: Command Code (0x06) followed by 3 bytes.
1088	1088
1089		-(((
1090	1090	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1091		-)))
1092	1092
1093	1093	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1094	1094	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1095	1095
	1043	+
1096	1096	= 4.  FAQ =
1097	1097
1098	1098	== 4.1  What is the frequency plan for LDDS75? ==
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1152	1152	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1153	1153	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1154	1154
	1103	+
1155	1155	= 7. ​ Packing Info =
1156	1156
1157	1157
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1166	1166	* Package Size / pcs : cm
1167	1167	* Weight / pcs : g
1168	1168
	1118	+
1169	1169	= 8.  ​Support =
1170	1170
1171	1171	* 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.

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