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edited by Edwin Chen
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11 11  
12 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.
13 13  
14 -LHT65N has a built-in 2400mAh non-chargeable battery which can be used for more than 10 years*.
14 +LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
15 15  
16 16  LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
17 17  
18 -LHT65N supports 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.
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.
19 19  
20 -*The actual battery life depends on how often to send data, please see battery analyzer chapter.
20 +*The actual battery life depends on how often to send data, please see the battery analyzer chapter.
21 21  
22 22  
23 23  == Features: ==
... ... @@ -27,11 +27,11 @@
27 27  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
28 28  * AT Commands to change parameters
29 29  * Remote configure parameters via LoRaWAN Downlink
30 -* Firmware upgradable via program port
31 -* Built-in 2400mAh battery for more than 10 years of use.
30 +* Firmware upgradeable via program port
31 +* Built-in 2400mAh battery for up to 10 years of use.
32 32  * Built-in Temperature & Humidity sensor
33 33  * Optional External Sensors
34 -* Tri-color LED to indicate status
34 +* Tri-color LED to indicate working status
35 35  * Datalog feature
36 36  
37 37  == Specification: ==
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41 41  * Resolution: 0.01 °C
42 42  * Accuracy Tolerance : Typ ±0.3 °C
43 43  * Long Term Drift: < 0.02 °C/yr
44 -* Operating Range: -40 ~~ 125 °C
44 +* Operating Range: -40 ~~ 85 °C
45 45  
46 46  **Built-in Humidity Sensor:**
47 47  
... ... @@ -50,7 +50,7 @@
50 50  * Long Term Drift: < 0.02 °C/yr
51 51  * Operating Range: 0 ~~ 96 %RH
52 52  
53 -**External Temperature Sensor – E1:**
53 +**External Temperature Sensor:**
54 54  
55 55  * Resolution: 0.0625 °C
56 56  * ±0.5°C accuracy from -10°C to +85°C
... ... @@ -57,10 +57,181 @@
57 57  * ±2°C accuracy from -55°C to +125°C
58 58  * Operating Range: -55 °C ~~ 125 °C
59 59  
60 += Connect LHT65N to IoT Server =
60 60  
62 +== How does LHT65N work? ==
63 +
64 +LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
65 +
66 +If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
67 +
68 +
69 +== How to Activate LHT65N? ==
70 +
71 +The LHT65N has two working modes:
72 +
73 +* **Deep Sleep Mode**: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
74 +* **Working Mode**: In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65 will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
75 +
76 +The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
77 +
78 +[[image:image-20220515123819-1.png||height="379" width="317"]]
79 +
80 +|**Behavior on ACT**|**Function**|**Action**
81 +|**Pressing ACT between 1s < time < 3s**|Test uplink status|If LHT65N is already Joined to the LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has an external sensor connected, blue led will blink once. If LHT65N has no external sensor, red led will blink once.
82 +|**Pressing ACT for more than 3s**|Active Device|green led will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network. green led will solid turn on for 5 seconds after join in network.
83 +|**Fast press ACT 5 times**|Deactivate Device|red led will solid on for 5 seconds. This means LHT65N is in Deep Sleep Mode.
84 +
85 +== Example to join LoRaWAN network ==
86 +
87 +(% class="wikigeneratedid" %)
88 +This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
89 +
90 +(% class="wikigeneratedid" %)
91 +[[image:image-20220522232442-1.png||height="387" width="648"]]
92 +
93 +Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
94 +
95 +
96 +=== **Step 1**: Create Device n TTN ===
97 +
98 +Create a device in TTN V3 with the OTAA keys from LHT65N.
99 +
100 +Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
101 +
102 +[[image:image-20220522232812-2.png||height="219" width="279"]]
103 +
104 +User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
105 +
106 +Add APP EUI in the application.
107 +
108 +[[image:image-20220522232916-3.png]]
109 +
110 +
111 +[[image:image-20220522232932-4.png]]
112 +
113 +
114 +[[image:image-20220522232954-5.png]]
115 +
116 +Note: LHT65N use same payload as LHT65.
117 +
118 +[[image:image-20220522233026-6.png]]
119 +
120 +
121 +Input APP EUI,  APP KEY and DEV EUI:
122 +
123 +[[image:image-20220522233118-7.png]]
124 +
125 +
126 +=== Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
127 +
128 +Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
129 +
130 +[[image:image-20220522233300-8.png]]
131 +
132 +
133 +== Uplink Payload: ==
134 +
135 +The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and(% class="mark" %) every 20 minutes(%%) send one uplink by default.
136 +
137 +After each uplink, the (% class="mark" %)BLUE LED(%%) will blink once.
138 +
139 +
140 +(% style="width:572px" %)
141 +|(% style="width:106px" %)**Size(bytes)**|(% style="width:71px" %)**2**|(% style="width:128px" %)**2**|(% style="width:103px" %)**2**|(% style="width:72px" %)**1**|(% style="width:89px" %)**4**
142 +|(% style="width:106px" %)**Value**|(% style="width:71px" %)[[BAT>>path:#Battery]]|(% style="width:128px" %)(((
143 +[[Built-In>>path:#SHT20_Temperature]]
144 +
145 +[[Temperature>>path:#SHT20_Temperature]]
146 +)))|(% style="width:103px" %)(((
147 +[[Built-in>>path:#SHT20_Humidity]]
148 +
149 +[[Humidity>>path:#SHT20_Humidity]]
150 +)))|(% style="width:72px" %)[[Ext>>path:#Extension_Sensor]] #|(% style="width:89px" %)[[Ext value>>path:#Extension_sensor_value]]
151 +
152 +* The First 6 bytes: has fix meanings for every LHT65N.
153 +* The 7th byte (EXT #): defines the external sensor model.
154 +* The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won’t be these four bytes.)
155 +
156 +
157 +=== Decoder in TTN V3 ===
158 +
159 +When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
160 +
161 +Below is the position to put the decoder and LHT65N decoder can be download from here:
162 +
163 +
164 +[[image:image-20220522234118-10.png]]
165 +
166 +
167 +== LED Indicator ==
168 +
169 +The LHT65N has a triple color LED which for easy shows different stage.
170 +
171 +While pressing ACT button, the LED will work as per LED status with ACT button.
172 +
173 +In a normal working state:
174 +
175 +* For each uplink, the BLUE LED or RED LED will blink once.
176 +* BLUE LED when an external sensor is connected
177 +* RED LED when an external sensor is not connected
178 +* For each success downlink, the PURPLE LED will blink once
179 +
180 +----
181 +
182 +== Installation ==
183 +
184 +[[image:image-20220516231650-1.png||height="632" width="620"]]
185 +
186 +
187 +
188 +
189 += Sensors & Accessories =
190 +
191 +== E3 Temperature Probe ==
192 +
193 +[[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
194 +
195 +
196 +With Temperature sensor with 2 meters cable long
197 +
198 +* Resolution: 0.0625 °C
199 +* ±0.5°C accuracy from -10°C to +85°C
200 +* ±2°C accuracy from -55°C to +125°C
201 +* Operating Range: -40 ~~ 125 °C
202 +* -55°C to 125°C
203 +* Working voltage 2.35v ~~ 5v
204 +
205 +
206 += Battery & How to replace =
207 +
208 +== Battery Type ==
209 +
210 +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.
211 +
212 +The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
213 +[[image:image-20220515075034-1.png||height="208" width="644"]]
214 +
215 +
216 +The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
217 +
218 +
219 +== Replace Battery ==
220 +
221 +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.
222 +
223 +[[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
224 +
225 +
226 +== Battery Life Analyze ==
227 +
228 +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:
229 +https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
230 +
231 +
61 61  = Order Info =
62 62  
63 -Part Number: (% class="mark" %)**LHT65-XX**
234 +Part Number: (% class="mark" %)**LHT65N-XX**
64 64  
65 65  **XX**: The default frequency band
66 66  
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73 73  * **IN865**: LoRaWAN IN865 band
74 74  * **CN470**: LoRaWAN CN470 band
75 75  
247 +**YY**: Sensor Accessories
76 76  
249 +* **E3**: External Temperature Probe
250 +
77 77  = Packing Info =
78 78  
79 79  **Package Includes**:
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89 89  * Package Size / pcs : 14.5 x 8 x 5 cm
90 90  * Weight / pcs : 170g
91 91  
92 -
266 += FCC Warning =
267 +
268 +This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
269 +
270 +(1) This device may not cause harmful interference, and
271 +
272 +(2) this device must accept any interference received, including interference that may cause undesired operation
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