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22	22	(((
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24	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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32	32	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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40	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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48	48	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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56	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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64	64	(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
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70	70	[[image:1654847051249-359.png]]
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87	87	* 4000mAh or 8500mAh Battery for long term use
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89	89
90		-
91		-
92		-
93	93	== 1.3  Specification ==
94	94
95	95	=== 1.3.1  Rated environmental conditions ===
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96	96
97	97	[[image:image-20220610154839-1.png]]
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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)**
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	69	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
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	71	+**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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	74	+
105	105	=== 1.3.2  Effective measurement range Reference beam pattern ===
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107	107	**(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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116	116	**(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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120	120	[[image:1654852175653-550.png]](% style="display:none" %) ** **
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137	137
138		-
139		-
140	140	== 1.6  Pin mapping and power on ==
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183	183	[[image:image-20220607170145-1.jpeg]]
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187	187	For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
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191	191	Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
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195	195	**Add APP EUI in the application**
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197	197
198	198	[[image:image-20220610161353-4.png]]
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236	236	== 2.3  ​Uplink Payload ==
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238	238	(((
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240	240	LDDS75 will uplink payload via LoRaWAN with below payload format:
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244	244	Uplink payload includes in total 4 bytes.
245	245	Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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255	255	**Size (bytes)**
256	256	)))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
257	257	|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
258		-[[Distance>>||anchor="H2.3.2A0Distance"]]
	214	+[[Distance>>||anchor="H2.3.3A0Distance"]]
259	259
260	260	(unit: mm)
261		-)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
262		-[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
263		-)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
	217	+)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
	218	+[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
	219	+)))|[[Sensor Flag>>path:#Sensor_Flag]]
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265	265	[[image:1654850511545-399.png]]
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279	279
280	280	=== 2.3.2  Distance ===
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283	283	Get the distance. Flat object range 280mm - 7500mm.
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287	287	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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291	291	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
292	292	* 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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294		-
295		-
296		-
297		-
298	298	=== 2.3.3  Interrupt Pin ===
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300		-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.
	248	+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.
301	301
302	302	**Example:**
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324	324	=== 2.3.5  Sensor Flag ===
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327	327	0x01: Detect Ultrasonic Sensor
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331	331	0x00: No Ultrasonic Sensor
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343	343	The payload decoder function for TTN V3 is here:
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346	346	LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
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870	870	* Solid ON for 5 seconds once device successful Join the network.
871	871	* Blink once when device transmit a packet.
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873		-
874		-
875		-
876		-
877	877	== 2.8  ​Firmware Change Log ==
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881	881	**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
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889	889	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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897	897	[[image:image-20220610172003-1.png]]
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899		-
900	900	[[image:image-20220610172003-2.png]]
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903		-
904	904	== 2.10  Battery Analysis ==
905	905
906	906	=== 2.10.1  Battery Type ===
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911	911	The battery related documents as below:
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913	913	* (((
914		-[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
	843	+[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
915	915	)))
916	916	* (((
917	917	[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
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927	927	=== 2.10.2  Replace the battery ===
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929	929	(((
930		-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.
	859	+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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935	935	)))
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938		-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)
	867	+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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951	951	* (((
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953		-AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
	882	+AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
954	954	)))
955	955	)))
956	956	* (((
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1031	1031	[[image:image-20220610172924-5.png]]
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1035	1035	In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
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1039	1039	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1057	1057	(((
1058	1058	Format: Command Code (0x01) followed by 3 bytes time value.
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1060		-(((
1061	1061	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
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1063	1063
1064	1064	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1065	1065	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1070	1070	)))
1071	1071
1072		-
1073		-
1074		-
1075		-
1076	1076	== 3.3  Set Interrupt Mode ==
1077	1077
1078	1078	Feature, Set Interrupt mode for GPIO_EXIT.
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1086	1086
1087	1087	Format: Command Code (0x06) followed by 3 bytes.
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1090	1090	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
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1093	1093	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1094	1094	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1095	1095
1096		-
1097	1097	= 4.  FAQ =
1098	1098
1099	1099	== 4.1  What is the frequency plan for LDDS75? ==
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1153	1153	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1154	1154	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1155	1155
1156		-
1157	1157	= 7. ​ Packing Info =
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1168	1168	* Package Size / pcs : cm
1169	1169	* Weight / pcs : g
1170	1170
1171		-
1172	1172	= 8.  ​Support =
1173	1173
1174	1174	* 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.