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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]]
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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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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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128	128	* Sewer
129	129	* Bottom water level monitoring
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131		-
132		-
133	133	== 1.6  Pin mapping and power on ==
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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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839	839	* Solid ON for 5 seconds once device successful Join the network.
840	840	* Blink once when device transmit a packet.
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842	842	== 2.8  ​Firmware Change Log ==
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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 =
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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.