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86	86	* IP66 Waterproof Enclosure
87	87	* 4000mAh or 8500mAh Battery for long term use
88	88
89		-
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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129	129	* Bottom water level monitoring
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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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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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262	262
263	263	=== 2.3.2  Distance ===
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265	265	Get the distance. Flat object range 280mm - 7500mm.
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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.
271	271	* 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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273	273	=== 2.3.3  Interrupt Pin ===
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275	275	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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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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