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87	87	* 4000mAh or 8500mAh Battery for long term use
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90	90	== 1.3  Specification ==
91	91
92	92	=== 1.3.1  Rated environmental conditions ===
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112	112	**(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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115	115	[[image:1654852175653-550.png]](% style="display:none" %) ** **
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128	128	* Sewer
129	129	* Bottom water level monitoring
130	130
131		-
132		-
133	133	== 1.6  Pin mapping and power on ==
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176	176	[[image:image-20220607170145-1.jpeg]]
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179	179	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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181	181	Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
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182	182
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183	183	**Add APP EUI in the application**
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184	184
185	185	[[image:image-20220610161353-4.png]]
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223	223	== 2.3  ​Uplink Payload ==
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225	225	(((
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226	226	LDDS75 will uplink payload via LoRaWAN with below payload format:
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227	227
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228	228	Uplink payload includes in total 4 bytes.
229	229	Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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263	263	=== 2.3.2  Distance ===
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265	265	Get the distance. Flat object range 280mm - 7500mm.
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266	266
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267	267	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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270	270	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
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298	298
299	299	=== 2.3.5  Sensor Flag ===
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301	301	0x01: Detect Ultrasonic Sensor
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303	303	0x00: No Ultrasonic Sensor
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314	314	The payload decoder function for TTN V3 is here:
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316	316	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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842	842	== 2.8  ​Firmware Change Log ==
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845	845	**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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848	848	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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989	989	[[image:image-20220610172924-5.png]]
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992	992	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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995	995	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1013	1013	(((
1014	1014	Format: Command Code (0x01) followed by 3 bytes time value.
1015	1015
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1016	1016	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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1018	1018	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1019	1019	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1037	1037	Format: Command Code (0x06) followed by 3 bytes.
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1039	1039	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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1041	1041	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1042	1042	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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1044	1044	= 4.  FAQ =
1045	1045
1046	1046	== 4.1  What is the frequency plan for LDDS75? ==
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1100	1100	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1101	1101	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1103	1103	= 7. ​ Packing Info =
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1114	1114	* Package Size / pcs : cm
1115	1115	* Weight / pcs : g
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1117	1117	= 8.  ​Support =
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1119	1119	* 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.