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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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68	68	[[image:image-20220610154839-1.png]]
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70		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
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	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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72		-**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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75		-
76	76	=== 1.3.2  Effective measurement range Reference beam pattern ===
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78	78	**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
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102	102	* Sewer
103	103	* Bottom water level monitoring
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105		-
106		-
107		-
108	108	== 1.6  Pin mapping and power on ==
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213	213	**Size (bytes)**
214	214	)))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
215	215	|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
216		-[[Distance>>||anchor="H2.3.3A0Distance"]]
	240	+[[Distance>>||anchor="H2.3.2A0Distance"]]
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218	218	(unit: mm)
219		-)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
220		-[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
221		-)))|[[Sensor Flag>>path:#Sensor_Flag]]
	243	+)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
	244	+[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
	245	+)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
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223	223	[[image:1654850511545-399.png]]
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247	247
248	248	=== 2.3.3  Interrupt Pin ===
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250		-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.
	274	+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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252	252	**Example:**
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830	830	[[image:image-20220610172003-1.png]]
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832	832	[[image:image-20220610172003-2.png]]
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835	835	== 2.10  Battery Analysis ==
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837	837	=== 2.10.1  Battery Type ===
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842	842	The battery related documents as below:
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845		-[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
	871	+[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
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848	848	[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
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858	858	=== 2.10.2  Replace the battery ===
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861		-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.
	887	+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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869		-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)
	895	+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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874		-= 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
	900	+= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
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884		-AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
	910	+AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
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1014	1014	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1015	1015	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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1017	1017	= 4.  FAQ =
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1019	1019	== 4.1  What is the frequency plan for LDDS75? ==
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1073	1073	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1074	1074	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1076	1076	= 7. ​ Packing Info =
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1087	1087	* Package Size / pcs : cm
1088	1088	* Weight / pcs : g
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1090	1090	= 8.  ​Support =
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1092	1092	* 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.