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3	3
4	4	**Contents:**
5	5
6		-{{toc/}}
7	7
8	8
9	9
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21	21
22	22	(((
23	23	(((
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.
	23	+The Dragino LDDS45 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 LDDS45 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.
25	25	)))
26	26
27	27	(((
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37	37	)))
38	38
39	39	(((
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.
	39	+The LoRa wireless technology used in LDDS45 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	(((
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45	45	)))
46	46
47	47	(((
48		-LDDS75 is powered by (% style="color:#4472c4" %)** 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
	47	+LDDS45 is powered by (% style="color:#4472c4" %)** 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
49	49	)))
50	50
51	51	(((
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53	53	)))
54	54
55	55	(((
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.
	55	+Each LDDS45 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	(((
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62	62
63	63	(((
64	64	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
	64	+
	65	+
65	65	)))
66	66	)))
67	67	)))
68	68
	70	+[[image:1654912858581-740.png]]
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71	71
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73	73	== ​1.2  Features ==
74	74
75	75	* LoRaWAN 1.0.3 Class A
76		-* Ultra low power consumption
	78	+* Ultra-low power consumption
77	77	* Distance Detection by Ultrasonic technology
78		-* Flat object range 280mm - 7500mm
	80	+* Flat object range 30mm - 4500mm
79	79	* Accuracy: ±(1cm+S*0.3%) (S: Distance)
	82	+* Measure Angle: 60°
80	80	* Cable Length : 25cm
81	81	* Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
82	82	* AT Commands to change parameters
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83	83	* Uplink on periodically
84	84	* Downlink to change configure
85	85	* IP66 Waterproof Enclosure
86		-* 4000mAh or 8500mAh Battery for long term use
	89	+* 8500mAh Battery for long term use
87	87
88	88
89	89
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93	93
94	94	[[image:image-20220610154839-1.png]]
95	95
	99	+
96	96	(((
97		-**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)**
	101	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  **
	102	+
	103	+**~ 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	98	)))
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141	141
142		-= 2.  Configure LDDS75 to connect to LoRaWAN network =
	148	+= 2.  Configure LDDS45 to connect to LoRaWAN network =
143	143
144	144	== 2.1  How it works ==
145	145
146	146	(((
147		-The LDDS75 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value
	153	+The LDDS45 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS45. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value
148	148	)))
149	149
150	150	(((
151		-In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS75.
	157	+In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS45.
152	152	)))
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157	157
158	158	(((
159	159	Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LG308>>url:http://www.dragino.com/products/lora/item/140-lg308.html]] as a LoRaWAN gateway in this example.
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	167	+
160	160	)))
161	161
	170	+[[image:1654913911773-521.png]]
	171	+
	172	+
162	162	(((
163		-[[image:1654848616367-242.png]]
	174	+
164	164	)))
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166	166	(((
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168	168	)))
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171		-(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
	182	+(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS45.
172	172	)))
173	173
174	174	(((
175		-Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
	186	+Each LDDS45 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
176	176	)))
177	177
178	178	[[image:image-20220607170145-1.jpeg]]
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199	199
200	200	[[image:image-20220610161353-7.png]]
201	201
	213	+**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
202	202
	215	+
	216	+
203	203	You can also choose to create the device manually.
204	204
205	205	[[image:image-20220610161538-8.png]]
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214	214
215		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
	229	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
216	216
217	217
218	218	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
219	219
220		-[[image:image-20220610161724-10.png]]
	234	+[[image:image-20220611102908-2.png]]
221	221
222	222
223	223	(((
224		-(% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
	238	+(% style="color:blue" %)**Step 3**(%%)**:** The LDDS45 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
225	225	)))
226	226
227	227	[[image:1654849068701-275.png]]
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232	232
233	233	(((
234	234	(((
235		-LDDS75 will uplink payload via LoRaWAN with below payload format:
236		-)))
	249	+LDDS45 will uplink payload via LoRaWAN with below payload format:
237	237
238		-(((
239		-Uplink payload includes in total 4 bytes.
240		-Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
	251	+Uplink payload includes in total 8 bytes.
241	241	)))
242	242	)))
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264	264	=== 2.3.1  Battery Info ===
265	265
266	266
267		-Check the battery voltage for LDDS75.
	278	+Check the battery voltage for LDDS45.
268	268
269	269	Ex1: 0x0B45 = 2885mV
270	270
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275	275	=== 2.3.2  Distance ===
276	276
277	277	(((
278		-Get the distance. Flat object range 280mm - 7500mm.
	289	+Get the distance. Flat object range 30mm - 4500mm.
279	279	)))
280	280
281	281	(((
282		-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.**
	293	+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.**
283	283	)))
284	284
285	285
286	286	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
287		-* 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.
	298	+* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
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