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1 (% style="text-align:center" %)
2 [[image:image-20220523115324-1.jpeg||height="500" width="500"]]
3
4
5 **LHT65N LoRaWAN Temperature & Humidity Sensor Manual**
6
7
8
9 **Table of Contents：**
10
11 {{toc/}}
12
13
14
15 = 1.Introduction =
16
17 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
18
19 (((
20 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor**(%%)**.**
21 )))
22
23 (((
24 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.
25 )))
26
27 (((
28 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
29 )))
30
31 (((
32 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
33 )))
34
35 (((
36 LHT65N supports (% style="color:#4f81bd" %)**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.
37 )))
38
39 (((
40 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
41 )))
42
43 == 1.2 Features ==
44
45 * Wall mountable
46 * LoRaWAN v1.0.3 Class A protocol
47 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
48 * AT Commands to change parameters
49 * Remote configure parameters via LoRaWAN Downlink
50 * Firmware upgradeable via program port
51 * Built-in 2400mAh battery for up to 10 years of use.
52 * Built-in Temperature & Humidity sensor
53 * Optional External Sensors
54 * Tri-color LED to indicate working status
55 * Datalog feature
56
57 == 1.3 Specification ==
58
59 (((
60 **Built-in Temperature Sensor:**
61 )))
62
63 * (((
64 Resolution: 0.01 °C
65 )))
66 * (((
67 Accuracy Tolerance : Typ ±0.3 °C
68 )))
69 * (((
70 Long Term Drift: < 0.02 °C/yr
71 )))
72 * (((
73 Operating Range: -40 ~~ 85 °C
74 )))
75
76 (((
77 **Built-in Humidity Sensor:**
78 )))
79
80 * (((
81 Resolution: 0.04 %RH
82 )))
83 * (((
84 Accuracy Tolerance : Typ ±3 %RH
85 )))
86 * (((
87 Long Term Drift: < 0.02 °C/yr
88 )))
89 * (((
90 Operating Range: 0 ~~ 96 %RH
91 )))
92
93 (((
94 **External Temperature Sensor:**
95 )))
96
97 * (((
98 Resolution: 0.0625 °C
99 )))
100 * (((
101 ±0.5°C accuracy from -10°C to +85°C
102 )))
103 * (((
104 ±2°C accuracy from -55°C to +125°C
105 )))
106 * (((
107 Operating Range: -55 °C ~~ 125 °C
108 )))
109
110 = 2. Connect LHT65N to IoT Server =
111
112 == 2.1 How does LHT65N work? ==
113
114 (((
115 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.
116 )))
117
118 (((
119 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.
120 )))
121
122 == 2.2 How to Activate LHT65N? ==
123
124 The LHT65N has two working modes:
125
126 * **Deep Sleep Mode**: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
127 * **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. 
128
129 (((
130 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
131 )))
132
133 [[image:image-20220515123819-1.png||height="379" width="317"]]
134
135 [[image:image-20220523153201-19.png||height="163" width="739"]]
136
137 == 2.3 Example to join LoRaWAN network ==
138
139 (% class="wikigeneratedid" %)
140 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.
141
142 (% class="wikigeneratedid" %)
143 [[image:image-20220522232442-1.png||height="387" width="648"]]
144
145 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:
146
147
148 === 2.3.1 Step 1: Create Device n TTN ===
149
150 Create a device in TTN V3 with the OTAA keys from LHT65N.
151
152 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
153
154 [[image:image-20220522232812-2.png||height="219" width="279"]]
155
156 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
157
158 Add APP EUI in the application.
159
160 [[image:image-20220522232916-3.png]]
161
162 [[image:image-20220522232932-4.png]]
163
164 [[image:image-20220522232954-5.png]]
165
166 Note: LHT65N use same payload as LHT65.
167
168 [[image:image-20220522233026-6.png]]
169
170
171 Input APP EUI,  APP KEY and DEV EUI:
172
173 [[image:image-20220522233118-7.png]]
174
175
176 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
177
178 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.
179
180 [[image:image-20220522233300-8.png||height="219" width="722"]]
181
182
183 == 2.4 Uplink Payload ==
184
185 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
186
187 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
188
189 (% border="1" style="background-color:#ffffcc; color:green; width:426px" %)
190 |(% style="width:97px" %)(((
191 **Size(bytes)**
192 )))|(% style="width:39px" %)(((
193 **2**
194 )))|(% style="width:100px" %)(((
195 **2**
196 )))|(% style="width:77px" %)(((
197 **2**
198 )))|(% style="width:47px" %)(((
199 **1**
200 )))|(% style="width:51px" %)(((
201 **4**
202 )))
203 |(% style="width:97px" %)(((
204 **Value**
205 )))|(% style="width:39px" %)(((
206 [[BAT>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.2BAT-BatteryInfo]]
207 )))|(% style="width:100px" %)(((
208 (((
209 [[Built-In Temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
210 )))
211 )))|(% style="width:77px" %)(((
212 (((
213 [[Built-in>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
214 )))
215
216 (((
217 [[Humidity>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
218 )))
219 )))|(% style="width:47px" %)(((
220 [[Ext>>path:#Extension_Sensor]] #
221 )))|(% style="width:51px" %)(((
222 [[Ext value>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.6Extvalue]]
223 )))
224
225 * The First 6 bytes: has fix meanings for every LHT65N.
226 * The 7th byte (EXT #): defines the external sensor model.
227 * 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.)
228
229 === 2.4.1 Decoder in TTN V3 ===
230
231 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.
232
233 Below is the position to put the decoder and LHT65N decoder can be download from here:
234
235 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
236
237 [[image:image-20220522234118-10.png||height="353" width="729"]]
238
239 === 2.4.2 BAT-Battery Info ===
240
241 These two bytes of BAT include the battery state and the actually voltage
242
243 [[image:image-20220523152839-18.png]]
244
245 [[image:image-20220522235639-1.png||height="139" width="727"]]
246
247 Check the battery voltage for LHT65N.
248
249 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
250 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
251
252 === 2.4.3 Built-in Temperature ===
253
254 [[image:image-20220522235639-2.png||height="138" width="722"]]
255
256 * Temperature:  0x0ABB/100=27.47℃
257
258 [[image:image-20220522235639-3.png]]
259
260 * Temperature:  (0xF5C6-65536)/100=-26.18℃
261
262 === 2.4.4 Built-in Humidity ===
263
264 [[image:image-20220522235639-4.png||height="138" width="722"]]
265
266 * Humidity:    0x025C/10=60.4%
267
268 === 2.4.5 Ext # ===
269
270 Bytes for External Sensor:
271
272 [[image:image-20220523152822-17.png]]
273
274 === 2.4.6 Ext value ===
275
276 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
277
278 [[image:image-20220522235639-5.png]]
279
280 * DS18B20 temp=0x0ADD/100=27.81℃
281
282 The last 2 bytes of data are meaningless
283
284 [[image:image-20220522235639-6.png]]
285
286 * External temperature= (0xF54F-65536)/100=-27.37℃
287
288 (((
289 The last 2 bytes of data are meaningless
290 )))
291
292 (((
293 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
294 )))
295
296
297 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
298
299 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:
300
301 (% border="1" style="background-color:#ffffcc; color:green; width:568px" %)
302 |(% style="width:96px" %)**Size(bytes)**|(% style="width:71px" %)**2**|(% style="width:99px" %)**2**|(% style="width:132px" %)**2**|(% style="width:54px" %)**1**|(% style="width:64px" %)**4**
303 |(% style="width:96px" %)(((
304 **Value**
305 )))|(% style="width:71px" %)(((
306 [[External temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H4.2SetExternalSensorMode]]
307 )))|(% style="width:99px" %)(((
308 (((
309 [[Built-In>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
310 )))
311
312 (((
313 [[Temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
314 )))
315 )))|(% style="width:132px" %)(((
316 (((
317 BAT Status &
318 )))
319
320 (((
321 [[Built-in Humidity>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
322 )))
323 )))|(% style="width:54px" %)(((
324 Status & Ext
325 )))|(% style="width:64px" %)(((
326 (((
327 [[Unix Time Stamp>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H4.1SetTransmitIntervalTime]]
328 )))
329 )))
330
331 * **Battery status & (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Built-in Humidity(%%)**
332
333 (% border="1" style="background-color:#ffffcc; color:green; width:469px" %)
334 |(% style="width:65px" %)Bit(bit)|(% style="width:267px" %)[15:14]|(% style="width:134px" %)[11:0]
335 |(% style="width:65px" %)Value|(% style="width:267px" %)(((
336 BAT Status
337
338 00(b): Ultra Low ( BAT <= 2.50v)
339
340 01(b): Low  (2.50v <=BAT <= 2.55v)
341
342 10(b): OK   (2.55v <= BAT <=2.65v)
343
344 11(b): Good   (BAT >= 2.65v)
345 )))|(% style="width:134px" %)(((
346 [[Built-in Humidity>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
347
348
349 )))
350
351 * **Status & Ext Byte**
352
353 [[image:image-20220523152434-16.png]]
354
355 * Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
356 * 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.
357 * 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)
358
359 == 2.5 Show data on Datacake ==
360
361 Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
362
363 (((
364 **Step 1**: Be sure that your device is programmed and properly connected to the LoRaWAN network.
365 )))
366
367 (((
368 **Step 2**: Configure your Application to forward data to Datacake you will need to add integration. Go to TTN V3 Console ~-~-> Applications ~-~-> Integrations ~-~-> Add Integrations.
369 )))
370
371 (((
372 Add Datacake:
373 )))
374
375 [[image:image-20220523000825-7.png||height="262" width="583"]]
376
377
378 Select default key as Access Key:
379
380 [[image:image-20220523000825-8.png||height="453" width="406"]]
381
382 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
383
384 [[image:image-20220523000825-9.png||height="366" width="392"]]
385
386 [[image:image-20220523000825-10.png||height="413" width="728"]]
387
388 == 2.6 Datalog Feature ==
389
390 This feature is always enabled. When user wants to retrieve the sensor value, he can send a poll command from the IoT platform to ask LHT65N to send the value in the required time slot.
391
392 === 2.6.1 Unix TimeStamp ===
393
394 LHT65N uses Unix TimeStamp format based on
395
396 [[image:image-20220523001219-11.png||height="97" width="627"]]
397
398
399 (((
400 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
401 )))
402
403 (((
404 Below is the converter example
405 )))
406
407 [[image:image-20220523001219-12.png||height="298" width="720"]]
408
409 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
410
411 === 2.6.2 Set Device Time ===
412
413 (((
414 There are two ways to set device’s time:
415 )))
416
417 (((
418 **~1. Through LoRaWAN MAC Command (Default settings)**
419 )))
420
421 (((
422 User need to set SYNCMOD=1 to enable sync time via MAC command.
423 )))
424
425 (((
426 Once LHT65N Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to LHT65N. If LHT65N fails to get the time from the server, LHT65N will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
427 )))
428
429 (((
430 Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn’t support. If server doesn’t support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.
431 )))
432
433 (((
434
435 )))
436
437 (((
438 **2. Manually Set Time**
439 )))
440
441 (((
442 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
443 )))
444
445 === 2.6.3 Poll sensor value ===
446
447 User can poll sensor value based on timestamps from the server. Below is the downlink command.
448
449 [[image:image-20220523152302-15.png]]
450
451 (((
452 Timestamp start and Timestamp end use Unix TimeStamp format as mentioned above. Devices will reply with all data log during this time period, use the uplink interval.
453 )))
454
455 (((
456 For example, downlink command **31 5FC5F350 5FC6 0160 05**
457 )))
458
459 (((
460 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
461 )))
462
463 (((
464 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
465 )))
466
467
468 === 2.6.4 Datalog Uplink payload ===
469
470 The Datalog poll reply uplink will use below payload format.
471
472 (((
473 **Retrieval data payload**
474 )))
475
476 (% border="1" style="background-color:#ffffcc; color:green; width:545px" %)
477 |(% style="width:93px" %)(((
478 **Size(bytes)**
479 )))|(% style="width:71px" %)(((
480 **2**
481 )))|(% style="width:102px" %)(((
482 **2**
483 )))|(% style="width:86px" %)(((
484 **2**
485 )))|(% style="width:90px" %)(((
486 **1**
487 )))|(% style="width:85px" %)(((
488 **4**
489 )))
490 |(% style="width:93px" %)(((
491 **Value**
492 )))|(% style="width:71px" %)(((
493 [[External sensor data>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.6Extvalue]]
494 )))|(% style="width:102px" %)(((
495 (((
496 [[Built In>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
497 )))
498
499 (((
500 [[Temperature>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.3Built-inTemperature]]
501 )))
502 )))|(% style="width:86px" %)(((
503 (((
504 [[Built-in>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
505 )))
506
507 (((
508 [[Humidity>>http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.4Built-inHumidity]]
509 )))
510 )))|(% style="width:90px" %)(((
511 [[Poll message flag & Ext>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.6.4DatalogUplinkpayload]]
512 )))|(% style="width:85px" %)(((
513 (((
514 [[Unix Time Stamp>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.6.1UnixTimeStamp]]
515 )))
516
517 (((
518
519 )))
520 )))
521
522 **Poll message flag & Ext**
523
524 [[image:image-20220523152208-14.png]]
525
526 (((
527 (((
528 Poll Message Flag: 1: This message is a poll message reply.
529 )))
530 )))
531
532 * (((
533 (((
534 Poll Message Flag is set to 1.
535 )))
536 )))
537 * (((
538 (((
539 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
540 )))
541 )))
542
543 (((
544 (((
545 For example, in US915 band, the max payload for different DR is:
546 )))
547 )))
548
549 (((
550 (((
551 a) DR0: max is 11 bytes so one entry of data
552 )))
553 )))
554
555 (((
556 (((
557 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
558 )))
559 )))
560
561 (((
562 (((
563 c) DR2: total payload includes 11 entries of data
564 )))
565 )))
566
567 (((
568 (((
569 d) DR3: total payload includes 22 entries of data.
570 )))
571 )))
572
573 (((
574 (((
575 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
576 )))
577 )))
578
579
580 **Example:**
581
582 If LHT65N has below data inside Flash:
583
584 [[image:image-20220523144455-1.png||height="335" width="735"]]
585
586 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
587
588 Where : Start time: 60065F97 = time 21/1/19 04:27:03
589
590 Stop time 60066DA7= time 21/1/19 05:27:03
591
592
593 LHT65N will uplink this payload.
594
595 [[image:image-20220523001219-13.png||height="421" width="727"]]
596
597 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
598
599 Where the first 11 bytes is for the first entry:
600
601 7FFF089801464160065F97
602
603 Ext sensor data=0x7FFF/100=327.67
604
605 Temp=0x0898/100=22.00
606
607 Hum=0x0146/10=32.6
608
609 poll message flag & Ext=0x41,means reply data,Ext=1
610
611 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
612
613 == 2.7 Alarm Mode ==
614
615 Alarm mode feature is added since firmware v1.5. When device is in Alarm mode, it will check the built-in sensor temperature in a short interval. If the temperature exceeds the pre-configure range, it will send an uplink immediately.
616
617 (% style="color:red" %)Note: Alarm mode will increase a little big the power consumption, we recommend extending the normal reading time when enabling this feature.
618
619 **AT Commands for Alarm mode:**
620
621 (% class="box infomessage" %)
622 (((
623 **AT+WMOD=1**: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
624 )))
625
626 (% class="box infomessage" %)
627 (((
628 **AT+CITEMP=1**: The interval to check the temperature for Alarm. (Unit: minute)
629 )))
630
631 == 2.8 LED Indicator ==
632
633 (((
634 The LHT65N has a triple color LED which for easy shows different stage.
635 )))
636
637 (((
638 While pressing ACT button, the LED will work as per LED status with ACT button.
639 )))
640
641 (((
642 In a normal working state:
643 )))
644
645 * (((
646 For each uplink, the BLUE LED or RED LED will blink once.
647 )))
648 * (((
649 BLUE LED when an external sensor is connected
650 )))
651 * (((
652 RED LED when an external sensor is not connected
653 )))
654 * (((
655 For each success downlink, the PURPLE LED will blink once
656 )))
657
658 ----
659
660 == 2.9 Installation ==
661
662 [[image:image-20220516231650-1.png||height="436" width="428"]]
663
664 = 3. Sensors & Accessories =
665
666 == 3.1 E3 Temperature Probe ==
667
668 [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
669
670
671 With Temperature sensor with 2 meters cable long
672
673 * Resolution: 0.0625 °C
674 * ±0.5°C accuracy from -10°C to +85°C
675 * ±2°C accuracy from -55°C to +125°C
676 * Operating Range: -40 ~~ 125 °C
677 * -55°C to 125°C
678 * Working voltage 2.35v ~~ 5v
679
680 = 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
681
682 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
683
684 * AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
685 * LoRaWAN Downlink instruction for different platforms:
686
687 [[http:~~/~~/wiki.dragino.com/index.php?title=Main_Page#Use_Note_for_Server>>url:http://wiki.dragino.com/index.php?title=Main_Page#Use_Note_for_Server]]
688
689 There are two kinds of commands to configure LHT65N, they are:
690
691 (% style="color:#4f81bd" %)* **General Commands**.
692
693 These commands are to configure:
694
695 * General system settings like: uplink interval.
696 * LoRaWAN protocol & radio-related commands.
697
698 They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki:
699
700 [[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
701
702 (% style="color:#4f81bd" %)* **Commands special design for LHT65N**
703
704 These commands are only valid for LHT65N, as below:
705
706 == 4.1 Set Transmit Interval Time ==
707
708 Feature: Change LoRaWAN End Node Transmit Interval.
709
710 **AT Command: AT+TDC**
711
712 [[image:image-20220523150701-2.png]]
713
714 **Downlink Command: 0x01**
715
716 Format: Command Code (0x01) followed by 3 bytes time value.
717
718 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
719
720 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
721 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
722
723 == 4.2 Set External Sensor Mode ==
724
725 Feature: Change External Sensor Mode.
726
727 **AT Command: AT+EXT**
728
729 [[image:image-20220523150759-3.png]]
730
731 **Downlink Command: 0xA2**
732
733 Total bytes: 2 ~~ 5 bytes
734
735 **Example:**
736
737 * 0xA201: Set external sensor type to E1
738 * 0xA209: Same as AT+EXT=9
739 * 0xA20702003c,Same as AT+SETCNT=60
740
741 == 4.3 Enable/Disable uplink Temperature probe ID ==
742
743 Feature: If PID is enabled, device will send the temperature probe ID on:
744
745 * First Packet after OTAA Join
746 * Every 24 hours since the first packet.
747
748 PID is default set to disable (0)
749
750 **AT Command:**
751
752 [[image:image-20220523150928-4.png]]
753
754 **Downlink Command:**
755
756 * 0xA800  **~-~->** AT+PID=0
757 * 0xA801     **~-~->** AT+PID=1
758
759 == 4.4 Set Password ==
760
761 Feature: Set device password, max 9 digits
762
763 **AT Command: AT+PWORD**
764
765 [[image:image-20220523151052-5.png]]
766
767 **Downlink Command:**
768
769 No downlink command for this feature.
770
771 == 4.5 Quit AT Command ==
772
773 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
774
775 **AT Command: AT+DISAT**
776
777 [[image:image-20220523151132-6.png]]
778
779 **Downlink Command:**
780
781 No downlink command for this feature.
782
783 == 4.6 Set to sleep mode ==
784
785 Feature: Set device to sleep mode
786
787 **AT Command: AT+SLEEP**
788
789 [[image:image-20220523151218-7.png]]
790
791 **Downlink Command:**
792
793 * There is no downlink command to set to Sleep mode.
794
795 == 4.7 Set system time ==
796
797 Feature: Set system time, unix format. [[See here for format detail.>>path:#TimeStamp]]
798
799 **AT Command:**
800
801 [[image:image-20220523151253-8.png]]
802
803 **Downlink Command:**
804
805 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
806
807 == 4.8 Set Time Sync Mode ==
808
809 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
810
811 SYNCMOD is set to 1 by default. If user want to set a different time from LoRaWAN server, user need to set this to 0.
812
813 **AT Command:**
814
815 [[image:image-20220523151336-9.png]]
816
817 **Downlink Command:**
818
819 0x28 01 ~/~/ Same As AT+SYNCMOD=1
820
821 0x28 00 ~/~/ Same As AT+SYNCMOD=0
822
823 == 4.9 Set Time Sync Interval ==
824
825 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
826
827 **AT Command:**
828
829 [[image:image-20220523151411-10.png]]
830
831 **Downlink Command:**
832
833 0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
834
835 == 4.10 Print data entries base on page. ==
836
837 Feature: Print the sector data from start page to stop page (max is 416 pages).
838
839 **AT Command: AT+PDTA**
840
841 [[image:image-20220523151450-11.png]]
842
843 **Downlink Command:**
844
845 No downlink commands for feature
846
847 == 4.11 Print last few data entries. ==
848
849 Feature: Print the last few data entries
850
851 **AT Command: AT+PLDTA**
852
853 [[image:image-20220523151524-12.png]]
854
855 **Downlink Command:**
856
857 No downlink commands for feature
858
859 == 4.12 Clear Flash Record ==
860
861 Feature: Clear flash storage for data log feature.
862
863 **AT Command: AT+CLRDTA**
864
865 [[image:image-20220523151556-13.png]]
866
867 **Downlink Command: 0xA3**
868
869 * Example: 0xA301 ~/~/Same as AT+CLRDTA
870
871 = 5. Battery & How to replace =
872
873 == 5.1 Battery Type ==
874
875 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.
876
877 (((
878 The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
879 [[image:image-20220515075034-1.png||height="208" width="644"]]
880 )))
881
882 (((
883 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
884
885 )))
886
887 == 5.2 Replace Battery ==
888
889 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.
890
891 [[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
892
893 == 5.3 Battery Life Analyze ==
894
895 (((
896 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:
897 https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
898 )))
899
900 = 6. Order Info =
901
902 (((
903 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX**
904 )))
905
906 (((
907 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
908 )))
909
910 * (((
911 (% style="color:#4f81bd" %)** AS923**(%%): LoRaWAN AS923 band
912 )))
913 * (((
914 (% style="color:#4f81bd" %)** AU915**(%%): LoRaWAN AU915 band
915 )))
916 * (((
917 (% style="color:#4f81bd" %)** EU433**(%%): LoRaWAN EU433 band
918 )))
919 * (((
920 (% style="color:#4f81bd" %)** EU868**(%%): LoRaWAN EU868 band
921 )))
922 * (((
923 (% style="color:#4f81bd" %)** KR920**(%%): LoRaWAN KR920 band
924 )))
925 * (((
926 (% style="color:#4f81bd" %)** US915**(%%): LoRaWAN US915 band
927 )))
928 * (((
929 (% style="color:#4f81bd" %)** IN865**(%%): LoRaWAN IN865 band
930 )))
931 * (((
932 (% style="color:#4f81bd" %)** CN470**(%%): LoRaWAN CN470 band
933 )))
934
935 (((
936 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
937 )))
938
939 * (((
940 (% style="color:#4f81bd" %)**E3**(%%): External Temperature Probe
941 )))
942
943 = 7. Packing Info =
944
945 (((
946 **Package Includes**:
947 )))
948
949 * (((
950 LHT65N Temperature & Humidity Sensor x 1
951 )))
952 * (((
953 Program cable x 1
954 )))
955 * (((
956 Optional external sensor
957 )))
958
959 (((
960 **Dimension and weight**:
961 )))
962
963 * (((
964 Device Size:  13.5 x 7 x 3 cm
965 )))
966 * (((
967 Device Weight: 105g
968 )))
969 * (((
970 Package Size / pcs : 14.5 x 8 x 5 cm
971 )))
972 * (((
973 Weight / pcs : 170g
974 )))
975
976 = 8. FCC Warning =
977
978 (((
979 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
980 )))
981
982 (((
983 (1) This device may not cause harmful interference；
984 )))
985
986 (((
987 (2) this device must accept any interference received, including interference that may cause undesired operation.
988 )))