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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:468px" %)
302 |(% style="width:96px" %)(((
303 **Size(bytes)**
304 )))|(% style="width:71px" %)(((
305 **2**
306 )))|(% style="width:99px" %)(((
307 **2**
308 )))|(% style="width:132px" %)(((
309 **2**
310 )))|(% style="width:54px" %)(((
311 **1**
312 )))|(% style="width:64px" %)(((
313 **4**
314 )))
315 |(% style="width:96px" %)(((
316 **Value**
317 )))|(% style="width:71px" %)(((
318 [[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]]
319 )))|(% style="width:99px" %)(((
320 (((
321 [[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]]
322 )))
323
324 (((
325 [[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]]
326 )))
327 )))|(% style="width:132px" %)(((
328 (((
329 BAT Status &
330 )))
331
332 (((
333 [[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]]
334 )))
335 )))|(% style="width:54px" %)(((
336 Status & Ext
337 )))|(% style="width:64px" %)(((
338 (((
339 [[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]]
340 )))
341 )))
342
343 * **Battery status & (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Built-in Humidity(%%)**
344
345 (% border="1" style="background-color:#ffffcc; color:green; width:469px" %)
346 |(% style="width:65px" %)Bit(bit)|(% style="width:267px" %)[15:14]|(% style="width:134px" %)[11:0]
347 |(% style="width:65px" %)Value|(% style="width:267px" %)(((
348 BAT Status
349
350 00(b): Ultra Low ( BAT <= 2.50v)
351
352 01(b): Low  (2.50v <=BAT <= 2.55v)
353
354 10(b): OK   (2.55v <= BAT <=2.65v)
355
356 11(b): Good   (BAT >= 2.65v)
357 )))|(% style="width:134px" %)(((
358 [[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]]
359
360
361 )))
362
363 * **Status & Ext Byte**
364
365 [[image:image-20220523152434-16.png]]
366
367 * Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
368 * 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.
369 * 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)
370
371 == 2.5 Show data on Datacake ==
372
373 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:
374
375 (((
376 **Step 1**: Be sure that your device is programmed and properly connected to the LoRaWAN network.
377 )))
378
379 (((
380 **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.
381 )))
382
383 (((
384 Add Datacake:
385 )))
386
387 [[image:image-20220523000825-7.png||height="262" width="583"]]
388
389
390 Select default key as Access Key:
391
392 [[image:image-20220523000825-8.png||height="453" width="406"]]
393
394 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
395
396 [[image:image-20220523000825-9.png||height="366" width="392"]]
397
398 [[image:image-20220523000825-10.png||height="413" width="728"]]
399
400 == 2.6 Datalog Feature ==
401
402 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.
403
404 === 2.6.1 Unix TimeStamp ===
405
406 LHT65N uses Unix TimeStamp format based on
407
408 [[image:image-20220523001219-11.png||height="97" width="627"]]
409
410
411 (((
412 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
413 )))
414
415 (((
416 Below is the converter example
417 )))
418
419 [[image:image-20220523001219-12.png||height="298" width="720"]]
420
421 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
422
423 === 2.6.2 Set Device Time ===
424
425 (((
426 There are two ways to set device’s time:
427 )))
428
429 (((
430 **~1. Through LoRaWAN MAC Command (Default settings)**
431 )))
432
433 (((
434 User need to set SYNCMOD=1 to enable sync time via MAC command.
435 )))
436
437 (((
438 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).
439 )))
440
441 (((
442 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.
443 )))
444
445 (((
446
447 )))
448
449 (((
450 **2. Manually Set Time**
451 )))
452
453 (((
454 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
455 )))
456
457 === 2.6.3 Poll sensor value ===
458
459 User can poll sensor value based on timestamps from the server. Below is the downlink command.
460
461 [[image:image-20220523152302-15.png]]
462
463 (((
464 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.
465 )))
466
467 (((
468 For example, downlink command **31 5FC5F350 5FC6 0160 05**
469 )))
470
471 (((
472 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
473 )))
474
475 (((
476 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
477 )))
478
479
480 === 2.6.4 Datalog Uplink payload ===
481
482 The Datalog poll reply uplink will use below payload format.
483
484 (((
485 **Retrieval data payload**
486 )))
487
488 (% border="1" style="background-color:#ffffcc; color:green; width:469px" %)
489 |(% style="width:93px" %)(((
490 (((
491 **Size(bytes)**
492 )))
493 )))|(% style="width:71px" %)(((
494 (((
495 **2**
496 )))
497 )))|(% style="width:102px" %)(((
498 (((
499 **2**
500 )))
501 )))|(% style="width:86px" %)(((
502 (((
503 **2**
504 )))
505 )))|(% style="width:90px" %)(((
506 (((
507 **1**
508 )))
509 )))|(% style="width:85px" %)(((
510 (((
511 **4**
512 )))
513 )))
514 |(% style="width:93px" %)(((
515 (((
516 **Value**
517 )))
518 )))|(% style="width:71px" %)(((
519 (((
520 [[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]]
521 )))
522 )))|(% style="width:102px" %)(((
523 (((
524 (((
525 [[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]]
526 )))
527 )))
528
529 (((
530 (((
531 [[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]]
532 )))
533 )))
534 )))|(% style="width:86px" %)(((
535 (((
536 (((
537 [[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]]
538 )))
539 )))
540
541 (((
542 (((
543 [[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]]
544 )))
545 )))
546 )))|(% style="width:90px" %)(((
547 (((
548 [[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]]
549 )))
550 )))|(% style="width:85px" %)(((
551 (((
552 (((
553 [[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]]
554 )))
555 )))
556
557 (((
558 (((
559
560 )))
561 )))
562 )))
563
564 **Poll message flag & Ext**
565
566 [[image:image-20220523152208-14.png]]
567
568 (((
569 (((
570 Poll Message Flag: 1: This message is a poll message reply.
571 )))
572 )))
573
574 * (((
575 (((
576 Poll Message Flag is set to 1.
577 )))
578 )))
579 * (((
580 (((
581 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
582 )))
583 )))
584
585 (((
586 (((
587 For example, in US915 band, the max payload for different DR is:
588 )))
589 )))
590
591 (((
592 (((
593 a) DR0: max is 11 bytes so one entry of data
594 )))
595 )))
596
597 (((
598 (((
599 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
600 )))
601 )))
602
603 (((
604 (((
605 c) DR2: total payload includes 11 entries of data
606 )))
607 )))
608
609 (((
610 (((
611 d) DR3: total payload includes 22 entries of data.
612 )))
613 )))
614
615 (((
616 (((
617 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
618 )))
619 )))
620
621
622 **Example:**
623
624 If LHT65N has below data inside Flash:
625
626 [[image:image-20220523144455-1.png||height="335" width="735"]]
627
628 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
629
630 Where : Start time: 60065F97 = time 21/1/19 04:27:03
631
632 Stop time 60066DA7= time 21/1/19 05:27:03
633
634
635 LHT65N will uplink this payload.
636
637 [[image:image-20220523001219-13.png||height="421" width="727"]]
638
639 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
640
641 Where the first 11 bytes is for the first entry:
642
643 7FFF089801464160065F97
644
645 Ext sensor data=0x7FFF/100=327.67
646
647 Temp=0x0898/100=22.00
648
649 Hum=0x0146/10=32.6
650
651 poll message flag & Ext=0x41,means reply data,Ext=1
652
653 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
654
655 == 2.7 Alarm Mode ==
656
657 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.
658
659 (% 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.
660
661 **AT Commands for Alarm mode:**
662
663 (% class="box infomessage" %)
664 (((
665 **AT+WMOD=1**: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
666 )))
667
668 (% class="box infomessage" %)
669 (((
670 **AT+CITEMP=1**: The interval to check the temperature for Alarm. (Unit: minute)
671 )))
672
673 == 2.8 LED Indicator ==
674
675 (((
676 The LHT65N has a triple color LED which for easy shows different stage.
677 )))
678
679 (((
680 While pressing ACT button, the LED will work as per LED status with ACT button.
681 )))
682
683 (((
684 In a normal working state:
685 )))
686
687 * (((
688 For each uplink, the BLUE LED or RED LED will blink once.
689 )))
690 * (((
691 BLUE LED when an external sensor is connected
692 )))
693 * (((
694 RED LED when an external sensor is not connected
695 )))
696 * (((
697 For each success downlink, the PURPLE LED will blink once
698 )))
699
700 ----
701
702 == 2.9 Installation ==
703
704 [[image:image-20220516231650-1.png||height="436" width="428"]]
705
706 = 3. Sensors & Accessories =
707
708 == 3.1 E3 Temperature Probe ==
709
710 [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
711
712
713 With Temperature sensor with 2 meters cable long
714
715 * Resolution: 0.0625 °C
716 * ±0.5°C accuracy from -10°C to +85°C
717 * ±2°C accuracy from -55°C to +125°C
718 * Operating Range: -40 ~~ 125 °C
719 * -55°C to 125°C
720 * Working voltage 2.35v ~~ 5v
721
722 = 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
723
724 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
725
726 * AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
727 * LoRaWAN Downlink instruction for different platforms:
728
729 [[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]]
730
731 There are two kinds of commands to configure LHT65N, they are:
732
733 (% style="color:#4f81bd" %)* **General Commands**.
734
735 These commands are to configure:
736
737 * General system settings like: uplink interval.
738 * LoRaWAN protocol & radio-related commands.
739
740 They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki:
741
742 [[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
743
744 (% style="color:#4f81bd" %)* **Commands special design for LHT65N**
745
746 These commands are only valid for LHT65N, as below:
747
748 == 4.1 Set Transmit Interval Time ==
749
750 Feature: Change LoRaWAN End Node Transmit Interval.
751
752 **AT Command: AT+TDC**
753
754 [[image:image-20220523150701-2.png]]
755
756 **Downlink Command: 0x01**
757
758 Format: Command Code (0x01) followed by 3 bytes time value.
759
760 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
761
762 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
763 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
764
765 == 4.2 Set External Sensor Mode ==
766
767 Feature: Change External Sensor Mode.
768
769 **AT Command: AT+EXT**
770
771 [[image:image-20220523150759-3.png]]
772
773 **Downlink Command: 0xA2**
774
775 Total bytes: 2 ~~ 5 bytes
776
777 **Example:**
778
779 * 0xA201: Set external sensor type to E1
780 * 0xA209: Same as AT+EXT=9
781 * 0xA20702003c,Same as AT+SETCNT=60
782
783 == 4.3 Enable/Disable uplink Temperature probe ID ==
784
785 Feature: If PID is enabled, device will send the temperature probe ID on:
786
787 * First Packet after OTAA Join
788 * Every 24 hours since the first packet.
789
790 PID is default set to disable (0)
791
792 **AT Command:**
793
794 [[image:image-20220523150928-4.png]]
795
796 **Downlink Command:**
797
798 * 0xA800  **~-~->** AT+PID=0
799 * 0xA801     **~-~->** AT+PID=1
800
801 == 4.4 Set Password ==
802
803 Feature: Set device password, max 9 digits
804
805 **AT Command: AT+PWORD**
806
807 [[image:image-20220523151052-5.png]]
808
809 **Downlink Command:**
810
811 No downlink command for this feature.
812
813 == 4.5 Quit AT Command ==
814
815 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
816
817 **AT Command: AT+DISAT**
818
819 [[image:image-20220523151132-6.png]]
820
821 **Downlink Command:**
822
823 No downlink command for this feature.
824
825 == 4.6 Set to sleep mode ==
826
827 Feature: Set device to sleep mode
828
829 **AT Command: AT+SLEEP**
830
831 [[image:image-20220523151218-7.png]]
832
833 **Downlink Command:**
834
835 * There is no downlink command to set to Sleep mode.
836
837 == 4.7 Set system time ==
838
839 Feature: Set system time, unix format. [[See here for format detail.>>path:#TimeStamp]]
840
841 **AT Command:**
842
843 [[image:image-20220523151253-8.png]]
844
845 **Downlink Command:**
846
847 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
848
849 == 4.8 Set Time Sync Mode ==
850
851 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
852
853 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.
854
855 **AT Command:**
856
857 [[image:image-20220523151336-9.png]]
858
859 **Downlink Command:**
860
861 0x28 01 ~/~/ Same As AT+SYNCMOD=1
862
863 0x28 00 ~/~/ Same As AT+SYNCMOD=0
864
865 == 4.9 Set Time Sync Interval ==
866
867 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
868
869 **AT Command:**
870
871 [[image:image-20220523151411-10.png]]
872
873 **Downlink Command:**
874
875 0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
876
877 == 4.10 Print data entries base on page. ==
878
879 Feature: Print the sector data from start page to stop page (max is 416 pages).
880
881 **AT Command: AT+PDTA**
882
883 [[image:image-20220523151450-11.png]]
884
885 **Downlink Command:**
886
887 No downlink commands for feature
888
889 == 4.11 Print last few data entries. ==
890
891 Feature: Print the last few data entries
892
893 **AT Command: AT+PLDTA**
894
895 [[image:image-20220523151524-12.png]]
896
897 **Downlink Command:**
898
899 No downlink commands for feature
900
901 == 4.12 Clear Flash Record ==
902
903 Feature: Clear flash storage for data log feature.
904
905 **AT Command: AT+CLRDTA**
906
907 [[image:image-20220523151556-13.png]]
908
909 **Downlink Command: 0xA3**
910
911 * Example: 0xA301 ~/~/Same as AT+CLRDTA
912
913 = 5. Battery & How to replace =
914
915 == 5.1 Battery Type ==
916
917 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.
918
919 (((
920 The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
921 [[image:image-20220515075034-1.png||height="208" width="644"]]
922 )))
923
924 (((
925 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
926
927 )))
928
929 == 5.2 Replace Battery ==
930
931 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.
932
933 [[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
934
935 == 5.3 Battery Life Analyze ==
936
937 (((
938 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:
939 https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
940 )))
941
942 = 6. Order Info =
943
944 (((
945 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX**
946 )))
947
948 (((
949 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
950 )))
951
952 * (((
953 (% style="color:#4f81bd" %)** AS923**(%%): LoRaWAN AS923 band
954 )))
955 * (((
956 (% style="color:#4f81bd" %)** AU915**(%%): LoRaWAN AU915 band
957 )))
958 * (((
959 (% style="color:#4f81bd" %)** EU433**(%%): LoRaWAN EU433 band
960 )))
961 * (((
962 (% style="color:#4f81bd" %)** EU868**(%%): LoRaWAN EU868 band
963 )))
964 * (((
965 (% style="color:#4f81bd" %)** KR920**(%%): LoRaWAN KR920 band
966 )))
967 * (((
968 (% style="color:#4f81bd" %)** US915**(%%): LoRaWAN US915 band
969 )))
970 * (((
971 (% style="color:#4f81bd" %)** IN865**(%%): LoRaWAN IN865 band
972 )))
973 * (((
974 (% style="color:#4f81bd" %)** CN470**(%%): LoRaWAN CN470 band
975 )))
976
977 (((
978 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
979 )))
980
981 * (((
982 (% style="color:#4f81bd" %)**E3**(%%): External Temperature Probe
983 )))
984
985 = 7. Packing Info =
986
987 (((
988 **Package Includes**:
989 )))
990
991 * (((
992 LHT65N Temperature & Humidity Sensor x 1
993 )))
994 * (((
995 Program cable x 1
996 )))
997 * (((
998 Optional external sensor
999 )))
1000
1001 (((
1002 **Dimension and weight**:
1003 )))
1004
1005 * (((
1006 Device Size:  13.5 x 7 x 3 cm
1007 )))
1008 * (((
1009 Device Weight: 105g
1010 )))
1011 * (((
1012 Package Size / pcs : 14.5 x 8 x 5 cm
1013 )))
1014 * (((
1015 Weight / pcs : 170g
1016 )))
1017
1018 = 8. FCC Warning =
1019
1020 (((
1021 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1022 )))
1023
1024 (((
1025 (1) This device may not cause harmful interference；
1026 )))
1027
1028 (((
1029 (2) this device must accept any interference received, including interference that may cause undesired operation.
1030 )))