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86	86	* IP66 Waterproof Enclosure
87	87	* 4000mAh or 8500mAh Battery for long term use
88	88
	89	+
89	89	== 1.3  Specification ==
90	90
91	91	=== 1.3.1  Rated environmental conditions ===
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92	92
93	93	[[image:image-20220610154839-1.png]]
94	94
95		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
	96	+(((
	97	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
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96	96
97		-**b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
98	98
99	99
100		-
101	101	=== 1.3.2  Effective measurement range Reference beam pattern ===
102	102
103	103	**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
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109	109
110	110
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111	111	**(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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112	112
113	113
114	114	[[image:1654852175653-550.png]](% style="display:none" %) ** **
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127	127	* Sewer
128	128	* Bottom water level monitoring
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	133	+
	134	+
130	130	== 1.6  Pin mapping and power on ==
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132	132
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173	173	[[image:image-20220607170145-1.jpeg]]
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	181	+(((
176	176	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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177	177
	185	+(((
178	178	Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
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179	179
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180	180	**Add APP EUI in the application**
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181	181
182	182	[[image:image-20220610161353-4.png]]
183	183
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220	220	== 2.3  ​Uplink Payload ==
221	221
222	222	(((
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223	223	LDDS75 will uplink payload via LoRaWAN with below payload format:
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224	224
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225	225	Uplink payload includes in total 4 bytes.
226	226	Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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228	228
229	229	(((
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259	259
260	260	=== 2.3.2  Distance ===
261	261
	277	+(((
262	262	Get the distance. Flat object range 280mm - 7500mm.
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263	263
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264	264	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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265	265
266	266
267	267	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
268	268	* 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.
269	269
270		-
271	271	=== 2.3.3  Interrupt Pin ===
272	272
273	273	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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837	837	* Solid ON for 5 seconds once device successful Join the network.
838	838	* Blink once when device transmit a packet.
839	839
840		-
841	841	== 2.8  ​Firmware Change Log ==
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843	843
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1040	1040	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1041	1041	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1042	1042
1043		-
1044		-
1045	1045	= 4.  FAQ =
1046	1046
1047	1047	== 4.1  What is the frequency plan for LDDS75? ==
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1101	1101	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1102	1102	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1103	1103
1104		-
1105		-
1106	1106	= 7. ​ Packing Info =
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1108	1108
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1117	1117	* Package Size / pcs : cm
1118	1118	* Weight / pcs : g
1119	1119
1120		-
1121		-
1122	1122	= 8.  ​Support =
1123	1123
1124	1124	* 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.