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87	87	* 4000mAh or 8500mAh Battery for long term use
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90	90	== 1.3  Specification ==
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92	92	=== 1.3.1  Rated environmental conditions ===
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135	135	== 1.6  Pin mapping and power on ==
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275	275	=== 2.3.2  Distance ===
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277	277	Get the distance. Flat object range 280mm - 7500mm.
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279	279	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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282	282	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
283	283	* 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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285	285	=== 2.3.3  Interrupt Pin ===
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287	287	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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311	311	=== 2.3.5  Sensor Flag ===
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313	313	0x01: Detect Ultrasonic Sensor
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315	315	0x00: No Ultrasonic Sensor
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326	326	The payload decoder function for TTN V3 is here:
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328	328	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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854	854	== 2.8  ​Firmware Change Log ==
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857	857	**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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860	860	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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1001	1001	[[image:image-20220610172924-5.png]]
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1004	1004	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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1007	1007	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1025	1025	(((
1026	1026	Format: Command Code (0x01) followed by 3 bytes time value.
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1028	1028	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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1030	1030	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1031	1031	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1049	1049	Format: Command Code (0x06) followed by 3 bytes.
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1051	1051	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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1053	1053	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1054	1054	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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1056	1056	= 4.  FAQ =
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1058	1058	== 4.1  What is the frequency plan for LDDS75? ==
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1112	1112	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1113	1113	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1115	1115	= 7. ​ Packing Info =
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1126	1126	* Package Size / pcs : cm
1127	1127	* Weight / pcs : g
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1129	1129	= 8.  ​Support =
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1131	1131	* 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.