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3	3
4	4	**Contents:**
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	6	+{{toc/}}
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20	20
21	21	(((
22	22	(((
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.
	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.
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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.
	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.
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47		-LDDS45 is powered by (% style="color:#4472c4" %)** 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
	48	+LDDS75 is powered by (% style="color:#4472c4" %)** 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
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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.
	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.
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63	63	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
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69	69
70		-[[image:1654912858581-740.png]]
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75	75	== ​1.2  Features ==
76	76
77	77	* LoRaWAN 1.0.3 Class A
78		-* Ultra-low power consumption
	76	+* Ultra low power consumption
79	79	* Distance Detection by Ultrasonic technology
80		-* Flat object range 30mm - 4500mm
	78	+* Flat object range 280mm - 7500mm
81	81	* 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		-* 8500mAh Battery for long term use
	86	+* 4000mAh or 8500mAh Battery for long term use
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96	96
97	97	[[image:image-20220610154839-1.png]]
98	98
99		-
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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)**
	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)**
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148		-= 2.  Configure LDDS45 to connect to LoRaWAN network =
	142	+= 2.  Configure LDDS75 to connect to LoRaWAN network =
149	149
150	150	== 2.1  How it works ==
151	151
152	152	(((
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
	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
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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.
	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.
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165	165	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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170		-[[image:1654913911773-521.png]]
171		-
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174		-
	163	+[[image:1654848616367-242.png]]
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182		-(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS45.
	171	+(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
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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.
	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.
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188	188
189	189	[[image:image-20220607170145-1.jpeg]]
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210	210
211	211	[[image:image-20220610161353-7.png]]
212	212
213		-**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
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215		-
216		-
217	217	You can also choose to create the device manually.
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219	219	[[image:image-20220610161538-8.png]]
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229		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
	215	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
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231	231
232	232	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
233	233
234		-[[image:image-20220611102908-2.png]]
	220	+[[image:image-20220610161724-10.png]]
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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.
	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.
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241	241	[[image:1654849068701-275.png]]
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249		-LDDS45 will uplink payload via LoRaWAN with below payload format:
	235	+LDDS75 will uplink payload via LoRaWAN with below payload format:
	236	+)))
250	250
251		-Uplink payload includes in total 8 bytes.
	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
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275	275	=== 2.3.1  Battery Info ===
276	276
277	277
278		-Check the battery voltage for LDDS45.
	267	+Check the battery voltage for LDDS75.
279	279
280	280	Ex1: 0x0B45 = 2885mV
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286	286	=== 2.3.2  Distance ===
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288	288	(((
289		-Get the distance. Flat object range 30mm - 4500mm.
	278	+Get the distance. Flat object range 280mm - 7500mm.
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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.**
	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.**
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