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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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93	93
94	94	[[image:image-20220610154839-1.png]]
95	95
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)**
98		-)))
	98	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
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	100	+**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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	103	+
102	102	=== 1.3.2  Effective measurement range Reference beam pattern ===
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104	104	**(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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113	113	**(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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117	117	[[image:1654852175653-550.png]](% style="display:none" %) ** **
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130	130	* Sewer
131	131	* Bottom water level monitoring
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133		-
134		-
135	135	== 1.6  Pin mapping and power on ==
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137	137
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178	178	[[image:image-20220607170145-1.jpeg]]
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181		-(((
182	182	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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186	186	Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
187		-)))
188	188
189		-(((
190	190	**Add APP EUI in the application**
191		-)))
192	192
193	193	[[image:image-20220610161353-4.png]]
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231	231	== 2.3  ​Uplink Payload ==
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233	233	(((
234		-(((
235	235	LDDS75 will uplink payload via LoRaWAN with below payload format:
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237	237
238		-(((
239	239	Uplink payload includes in total 4 bytes.
240	240	Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
241	241	)))
242		-)))
243	243
244	244	(((
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274	274
275	275	=== 2.3.2  Distance ===
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277		-(((
278	278	Get the distance. Flat object range 280mm - 7500mm.
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280	280
281		-(((
282	282	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.**
283		-)))
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285	285
286	286	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
287	287	* 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	+
289	289	=== 2.3.3  Interrupt Pin ===
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291	291	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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855	855	* Solid ON for 5 seconds once device successful Join the network.
856	856	* Blink once when device transmit a packet.
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858	858	== 2.8  ​Firmware Change Log ==
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860	860
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1057	1057	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1058	1058	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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1060	1060	= 4.  FAQ =
1061	1061
1062	1062	== 4.1  What is the frequency plan for LDDS75? ==
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1116	1116	* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1117	1117	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
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1119	1119	= 7. ​ Packing Info =
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1130	1130	* Package Size / pcs : cm
1131	1131	* Weight / pcs : g
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1133	1133	= 8.  ​Support =
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1135	1135	* 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.