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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.
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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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76	76	== ​1.2  Features ==
77	77
78	78	* LoRaWAN 1.0.3 Class A
79		-* Ultra low power consumption
	78	+* Ultra-low power consumption
80	80	* Distance Detection by Ultrasonic technology
81		-* Flat object range 280mm - 7500mm
	80	+* Flat object range 30mm - 4500mm
82	82	* Accuracy: ±(1cm+S*0.3%) (S: Distance)
	82	+* Measure Angle: 60°
83	83	* Cable Length : 25cm
84	84	* Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
85	85	* AT Commands to change parameters
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86	86	* Uplink on periodically
87	87	* Downlink to change configure
88	88	* IP66 Waterproof Enclosure
89		-* 4000mAh or 8500mAh Battery for long term use
	89	+* 8500mAh Battery for long term use
90	90
91	91
92	92
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96	96
97	97	[[image:image-20220610154839-1.png]]
98	98
	99	+
99	99	(((
100		-**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)**
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103	103
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144	144
145		-= 2.  Configure LDDS75 to connect to LoRaWAN network =
	148	+= 2.  Configure LDDS45 to connect to LoRaWAN network =
146	146
147	147	== 2.1  How it works ==
148	148
149	149	(((
150		-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
151	151	)))
152	152
153	153	(((
154		-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.
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160	160
161	161	(((
162	162	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	+
163	163	)))
164	164
	170	+[[image:1654913911773-521.png]]
	171	+
	172	+
165	165	(((
166		-[[image:1654848616367-242.png]]
	174	+
167	167	)))
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169	169	(((
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171	171	)))
172	172
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174		-(% 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.
175	175	)))
176	176
177	177	(((
178		-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.
179	179	)))
180	180
181	181	[[image:image-20220607170145-1.jpeg]]
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202	202
203	203	[[image:image-20220610161353-7.png]]
204	204
	213	+**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
205	205
	215	+
	216	+
206	206	You can also choose to create the device manually.
207	207
208	208	[[image:image-20220610161538-8.png]]
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216	216
217	217
218		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
	229	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
219	219
220	220
221	221	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
222	222
223		-[[image:image-20220610161724-10.png]]
	234	+[[image:image-20220611102908-2.png]]
224	224
225	225
226	226	(((
227		-(% 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.
228	228	)))
229	229
230	230	[[image:1654849068701-275.png]]
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235	235
236	236	(((
237	237	(((
238		-LDDS75 will uplink payload via LoRaWAN with below payload format:
239		-)))
	249	+LDDS45 will uplink payload via LoRaWAN with below payload format:
240	240
241		-(((
242		-Uplink payload includes in total 4 bytes.
243		-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.
244	244	)))
245	245	)))
246	246
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267	267	=== 2.3.1  Battery Info ===
268	268
269	269
270		-Check the battery voltage for LDDS75.
	278	+Check the battery voltage for LDDS45.
271	271
272	272	Ex1: 0x0B45 = 2885mV
273	273
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278	278	=== 2.3.2  Distance ===
279	279
280	280	(((
281		-Get the distance. Flat object range 280mm - 7500mm.
	289	+Get the distance. Flat object range 30mm - 4500mm.
282	282	)))
283	283
284	284	(((
285		-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.**
286	286	)))
287	287
288	288
289	289	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
290		-* 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.
291	291
292	292
293	293
294	294	=== 2.3.3  Interrupt Pin ===
295	295
296		-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.
	304	+This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.3A0SetInterruptMode"]] for the hardware and software set up.
297	297
298	298	**Example:**
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