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Version 14.1 by Edwin Chen on 2022/05/15 08:06
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Edwin Chen 2.1 1 {{box cssClass="floatinginfobox" title="**Contents**"}}
2 {{toc/}}
3 {{/box}}
4
5 = Overview =
6
7 [[image:LHT65N_10.png||alt="LHT65_Image" height="265" width="265"]]
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9
10 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a(% class="mark" %) **built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% class="mark" %)**Temperature Sensor**(%%)**.**
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12 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
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Edwin Chen 6.1 14 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
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16 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
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Edwin Chen 6.1 18 LHT65N supports (% class="mark" %)Datalog Feature(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
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Edwin Chen 6.1 20 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
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23 == Features: ==
24
25 * Wall mountable
26 * LoRaWAN v1.0.3 Class A protocol
27 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
28 * AT Commands to change parameters
29 * Remote configure parameters via LoRaWAN Downlink
30 * Firmware upgradable via program port
Edwin Chen 6.1 31 * Built-in 2400mAh battery for up to 10 years of use.
Edwin Chen 2.1 32 * Built-in Temperature & Humidity sensor
33 * Optional External Sensors
Edwin Chen 6.1 34 * Tri-color LED to indicate working status
Edwin Chen 2.1 35 * Datalog feature
36
37 == Specification: ==
38
39 **Built-in Temperature Sensor:**
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41 * Resolution: 0.01 °C
42 * Accuracy Tolerance : Typ ±0.3 °C
43 * Long Term Drift: < 0.02 °C/yr
Edwin Chen 6.1 44 * Operating Range: -40 ~~ 85 °C
Edwin Chen 2.1 45
46 **Built-in Humidity Sensor:**
47
48 * Resolution: 0.04 %RH
49 * Accuracy Tolerance : Typ ±3 %RH
50 * Long Term Drift: < 0.02 °C/yr
51 * Operating Range: 0 ~~ 96 %RH
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Edwin Chen 6.1 53 **External Temperature Sensor:**
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55 * Resolution: 0.0625 °C
56 * ±0.5°C accuracy from -10°C to +85°C
57 * ±2°C accuracy from -55°C to +125°C
58 * Operating Range: -55 °C ~~ 125 °C
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Edwin Chen 11.1 60
Edwin Chen 14.1 61 = Sensors & Accessories =
62
63 == E3 Temperature Probe
64 ==
65
66 [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
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68
69 With Temperature sensor with 2 meters cable long
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71 * Resolution: 0.0625 °C
72 * ±0.5°C accuracy from -10°C to +85°C
73 * ±2°C accuracy from -55°C to +125°C
74 * Operating Range: -40 ~~ 125 °C
75 * -55°C to 125°C
76 * Working voltage 2.35v ~~ 5v
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78
79
Edwin Chen 11.1 80 = Battery & How to replace =
81
82 == Battery Type ==
83
84 LHT65N is equipped with a 2400mAH Li-MnO2 (CR17505) battery . The battery is an un-rechargeable battery with low discharge rate targeting for up to 8~~10 years use. This type of battery is commonly used in IoT devices for long-term running, such as water meters.
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86 The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
Edwin Chen 14.1 87 [[image:image-20220515075034-1.png||height="208" width="644"]]
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89
90 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
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92
93 == Replace Battery ==
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95 LHT65N has two screws on the back, Unscrew them, and changing the battery inside is ok. The battery is a general CR17450 battery. Any brand should be ok.
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97 [[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
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99
100 == Battery Life Analyze ==
101
102 Dragino battery-powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimated battery life:
103 https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
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105
Edwin Chen 2.1 106 = Order Info =
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Edwin Chen 14.1 108 Part Number: (% class="mark" %)**LHT65N-XX**
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110 **XX**: The default frequency band
111
112 * **AS923**: LoRaWAN AS923 band
113 * **AU915**: LoRaWAN AU915 band
114 * **EU433**: LoRaWAN EU433 band
115 * **EU868**: LoRaWAN EU868 band
116 * **KR920**: LoRaWAN KR920 band
117 * **US915**: LoRaWAN US915 band
118 * **IN865**: LoRaWAN IN865 band
119 * **CN470**: LoRaWAN CN470 band
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Edwin Chen 14.1 121 **YY**: Sensor Accessories
122
123 * **E3**: External Temperature Probe
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125
Edwin Chen 4.1 126 = Packing Info =
127
128 **Package Includes**:
129
130 * LHT65N Temperature & Humidity Sensor x 1
131 * Program cable x 1
132 * Optional external sensor
133
134 **Dimension and weight**:
135
136 * Device Size:  13.5 x 7 x 3 cm
137 * Device Weight: 105g
138 * Package Size / pcs : 14.5 x 8 x 5 cm
139 * Weight / pcs : 170g
140
Edwin Chen 7.1 141 = FCC Warning =
142
143 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
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145 (1) This device may not cause harmful interference, and
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147 (2) this device must accept any interference received, including interference that may cause undesired operation
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