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23	23	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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26	26	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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29	29	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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32	32	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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35	35	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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38	38	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
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43	43	[[image:1654847051249-359.png]]
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64	64	== 1.3  Specification ==
65	65
66	66	=== 1.3.1  Rated environmental conditions ===
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82	82	[[image:1654852253176-749.png]]
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85	85	**(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.**
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209	209	**Size (bytes)**
210	210	)))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
211	211	|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
212		-[[Distance>>||anchor="H2.3.3A0Distance"]]
	241	+[[Distance>>||anchor="H2.3.2A0Distance"]]
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214	214	(unit: mm)
215		-)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
216		-[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
217		-)))|[[Sensor Flag>>path:#Sensor_Flag]]
	244	+)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
	245	+[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
	246	+)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
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219	219	[[image:1654850511545-399.png]]
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241	241	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
242	242	* 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.
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244	244	=== 2.3.3  Interrupt Pin ===
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246		-This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up.
	276	+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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248	248	**Example:**
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810	810	* Solid ON for 5 seconds once device successful Join the network.
811	811	* Blink once when device transmit a packet.
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813	813	== 2.8  ​Firmware Change Log ==
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826	826	[[image:image-20220610172003-1.png]]
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828	828	[[image:image-20220610172003-2.png]]
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831	831	== 2.10  Battery Analysis ==
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833	833	=== 2.10.1  Battery Type ===
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838	838	The battery related documents as below:
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840	840	* (((
841		-[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
	874	+[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
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844	844	[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
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854	854	=== 2.10.2  Replace the battery ===
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857		-You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
	890	+You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
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865		-The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
	898	+The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can't find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
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870		-= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
	903	+= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
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880		-AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
	913	+AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
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1010	1010	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1011	1011	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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1013	1013	= 4.  FAQ =
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1015	1015	== 4.1  What is the frequency plan for LDDS75? ==
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1069	1069	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1070	1070	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1072	1072	= 7. ​ Packing Info =
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1083	1083	* Package Size / pcs : cm
1084	1084	* Weight / pcs : g
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1086	1086	= 8.  ​Support =
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1088	1088	* 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.