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87	87	* 4000mAh or 8500mAh Battery for long term use
88	88
89	89
90		-
91		-
92		-
93	93	== 1.3  Specification ==
94	94
95	95	=== 1.3.1  Rated environmental conditions ===
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135	135
136	136
137	137
138		-
139		-
140	140	== 1.6  Pin mapping and power on ==
141	141
142	142
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279	279
280	280	=== 2.3.2  Distance ===
281	281
282		-(((
283	283	Get the distance. Flat object range 280mm - 7500mm.
284		-)))
285	285
286		-(((
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.**
288		-)))
289	289
290	290
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.
293	293
294		-
295		-
296		-
297		-
298	298	=== 2.3.3  Interrupt Pin ===
299	299
300	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.
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323	323
324	324	=== 2.3.5  Sensor Flag ===
325	325
326		-(((
327	327	0x01: Detect Ultrasonic Sensor
328		-)))
329	329
330		-(((
331	331	0x00: No Ultrasonic Sensor
332		-)))
333	333
334	334
335	335
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342	342
343	343	The payload decoder function for TTN V3 is here:
344	344
345		-(((
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/]]
347		-)))
348	348
349	349
350	350
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873	873	== 2.8  ​Firmware Change Log ==
874	874
875	875
876		-(((
877	877	**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/]]
878		-)))
879	879
880		-(((
881		-
882		-)))
883	883
884		-(((
885	885	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
886		-)))
887	887
888	888
889	889
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1027	1027	[[image:image-20220610172924-5.png]]
1028	1028
1029	1029
1030		-(((
1031	1031	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:
1032		-)))
1033	1033
1034	1034
1035	1035	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1053	1053	(((
1054	1054	Format: Command Code (0x01) followed by 3 bytes time value.
1055	1055
1056		-(((
1057	1057	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1058		-)))
1059	1059
1060	1060	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1061	1061	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1078	1078
1079	1079	Format: Command Code (0x06) followed by 3 bytes.
1080	1080
1081		-(((
1082	1082	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1083		-)))
1084	1084
1085	1085	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1086	1086	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1087	1087
1088		-
1089	1089	= 4.  FAQ =
1090	1090
1091	1091	== 4.1  What is the frequency plan for LDDS75? ==
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1145	1145	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1146	1146	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1147	1147
1148		-
1149	1149	= 7. ​ Packing Info =
1150	1150
1151	1151
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1160	1160	* Package Size / pcs : cm
1161	1161	* Weight / pcs : g
1162	1162
1163		-
1164	1164	= 8.  ​Support =
1165	1165
1166	1166	* 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.