Last modified by Mengting Qiu on 2024/04/30 14:27
<
From version < 16.1 >
edited by Edwin Chen
on 2022/05/15 08:08
To version < 43.1 >
edited by Edwin Chen
on 2022/05/23 00:08
>
Change comment: Uploaded new attachment "image-20220523000825-7.png", version {1}

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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 =
61 +
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 +=== Decoder in TTN V3 ===
157 +
158 +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.
159 +
160 +Below is the position to put the decoder and LHT65N decoder can be download from here:
161 +
162 +[[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
163 +
164 +[[image:image-20220522234118-10.png]]
165 +
166 +
167 +=== BAT-Battery Info ===
168 +
169 +These two bytes of BAT include the battery state and the actually voltage
170 +
171 +(% style="width:646px" %)
172 +|Bit(bit)|(% style="width:272px" %)[15:14]|(% style="width:214px" %)[13:0]
173 +|Value|(% style="width:272px" %)(((
174 +BAT Status
175 +
176 +00(b): Ultra Low ( BAT <= 2.50v)
177 +
178 +01(b): Low  (2.50v <=BAT <= 2.55v)
179 +
180 +10(b): OK   (2.55v <= BAT <=2.65v)
181 +
182 +11(b): Good   (BAT >= 2.65v)
183 +)))|(% style="width:214px" %)Actually BAT voltage
184 +
185 +[[image:image-20220522235639-1.png]]
186 +
187 +Check the battery voltage for LHT65N.
188 +
189 +* BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
190 +* Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
191 +
192 +=== Built-in Temperature ===
193 +
194 +[[image:image-20220522235639-2.png]]
195 +
196 +* Temperature:  0x0ABB/100=27.47℃
197 +
198 +
199 +[[image:image-20220522235639-3.png]]
200 +
201 +* Temperature:  (0xF5C6-65536)/100=-26.18℃
202 +
203 +
204 +=== Built-in Humidity ===
205 +
206 +[[image:image-20220522235639-4.png]]
207 +
208 +* Humidity:    0x025C/10=60.4%
209 +
210 +
211 +=== Ext # ===
212 +
213 +Bytes for External Sensor:
214 +
215 +(% style="width:624px" %)
216 +|(% style="width:139px" %)**EXT # Value**|(% style="width:484px" %)**External Sensor Type**
217 +|(% style="width:139px" %)0x01|(% style="width:484px" %)Sensor E3, Temperature Sensor
218 +|(% style="width:139px" %)0x09|(% style="width:484px" %)Sensor E3, Temperature Sensor, Datalog Mod
219 +
220 +
221 +=== Ext value ===
222 +
223 +==== Ext~=1, E3 Temperature Sensor ====
224 +
225 +[[image:image-20220522235639-5.png]]
226 +
227 +
228 +* DS18B20 temp=0x0ADD/100=27.81℃
229 +
230 +The last 2 bytes of data are meaningless
231 +
232 +
233 +
234 +[[image:image-20220522235639-6.png]]
235 +
236 +* External temperature= (0xF54F-65536)/100=-27.37℃
237 +
238 +The last 2 bytes of data are meaningless
239 +
240 +
241 +If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
242 +
243 +
244 +==== Ext~=9, E3 sensor with Unix Time stamp ====
245 +
246 +Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
247 +
248 +
249 +(% style="width:697px" %)
250 +|(% style="width:96px" %)**Size(bytes)**|(% style="width:164px" %)**2**|(% style="width:104px" %)**2**|(% style="width:106px" %)**2**|(% style="width:108px" %)**1**|(% style="width:116px" %)**4**
251 +|(% style="width:96px" %)**Value**|(% style="width:164px" %)[[External temperature>>path:#DS18b20_value]]|(% style="width:104px" %)(((
252 +[[Built-In>>path:#SHT20_Temperature]]
253 +
254 +[[Temperature>>path:#SHT20_Temperature]]
255 +)))|(% style="width:106px" %)(((
256 +[[BAT Status &>>path:#BAT_Humidity]]
257 +
258 +[[Built-in>>path:#BAT_Humidity]]
259 +
260 +[[Humidity>>path:#BAT_Humidity]]
261 +)))|(% style="width:108px" %)[[Status & Ext>>path:#Status_EXT]]|(% style="width:116px" %)(((
262 +[[Unix>>path:#Unix_Time_Stamp]]
263 +
264 +[[Time Stamp>>path:#Unix_Time_Stamp]]
265 +)))
266 +
267 +* **Battery status & **[[**Built-in Humidity**>>path:#SHT20_Humidity]]
268 +
269 +(% style="width:587px" %)
270 +|Bit(bit)|(% style="width:280px" %)[15:14]|(% style="width:136px" %)[11:0]
271 +|Value|(% style="width:280px" %)(((
272 +BAT Status
273 +
274 +00(b): Ultra Low ( BAT <= 2.50v)
275 +
276 +01(b): Low  (2.50v <=BAT <= 2.55v)
277 +
278 +10(b): OK   (2.55v <= BAT <=2.65v)
279 +
280 +11(b): Good   (BAT >= 2.65v)
281 +)))|(% style="width:136px" %)(((
282 +[[Built-in Humidity>>path:#SHT20_Humidity]]
283 +
284 +
285 +)))
286 +
287 +
288 +* **Status & Ext Byte**
289 +
290 +(% style="width:732px" %)
291 +|(% style="width:128px" %)**Bits**|(% style="width:102px" %)**7**|(% style="width:145px" %)**6**|(% style="width:117px" %)**5**|(% style="width:147px" %)**4**|(% style="width:90px" %)**[3:0]**
292 +|(% style="width:128px" %)**Status & Ext**|(% style="width:102px" %)Not Defined|(% style="width:145px" %)Poll Message Flag|(% style="width:117px" %)Sync time OK|(% style="width:147px" %)Unix Time Request|(% style="width:90px" %)(((
293 +Ext:
294 +
295 +0b(1001)
296 +)))
297 +
298 +* Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
299 +* Sync time OK: 1: Set time ok，0: N/A. After time SYNC request is sent, LHT65N will set this bit to 0 until got the time stamp from the application server.
300 +* Unix Time Request:1: Request server downlink Unix time, 0 : N/A. In this mode, LHT65N will set this bit to 1 every 10 days to request a time SYNC. (AT+SYNCMOD to set this)
301 +
302 +
303 +
304 +== LED Indicator ==
305 +
306 +The LHT65N has a triple color LED which for easy shows different stage.
307 +
308 +While pressing ACT button, the LED will work as per LED status with ACT button.
309 +
310 +In a normal working state:
311 +
312 +* For each uplink, the BLUE LED or RED LED will blink once.
313 +* BLUE LED when an external sensor is connected
314 +* RED LED when an external sensor is not connected
315 +* For each success downlink, the PURPLE LED will blink once
316 +
317 +----
318 +
319 +== Installation ==
320 +
321 +[[image:image-20220516231650-1.png||height="632" width="620"]]
322 +
323 +
324 +
325 +
60 60  = Sensors & Accessories =
61 61  
62 62  == E3 Temperature Probe ==
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141 141  (1) This device may not cause harmful interference, and
142 142  
143 143  (2) this device must accept any interference received, including interference that may cause undesired operation
144 -
145 -
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