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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.
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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.