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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:86px" %)(((
506 (((
507 **1**
508 )))
509 )))|(% style="width:48px" %)(((
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:86px" %)(((
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:48px" %)(((
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 (((
629 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
630 )))
631
632 (((
633 Where : Start time: 60065F97 = time 21/1/19 04:27:03
634 )))
635
636 (((
637 Stop time 60066DA7= time 21/1/19 05:27:03
638 )))
639
640 (((
641
642 )))
643
644 (((
645 LHT65N will uplink this payload.
646 )))
647
648 [[image:image-20220523001219-13.png||height="421" width="727"]]
649
650 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
651
652 Where the first 11 bytes is for the first entry:
653
654 7FFF089801464160065F97
655
656 Ext sensor data=0x7FFF/100=327.67
657
658 Temp=0x0898/100=22.00
659
660 Hum=0x0146/10=32.6
661
662 poll message flag & Ext=0x41,means reply data,Ext=1
663
664 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
665
666 == 2.7 Alarm Mode ==
667
668 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.
669
670 (((
671 (% 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.
672 )))
673
674 (((
675 **AT Commands for Alarm mode:**
676 )))
677
678 (% class="box infomessage" %)
679 (((
680 (((
681 **AT+WMOD=1**: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
682 )))
683 )))
684
685 (% class="box infomessage" %)
686 (((
687 (((
688 **AT+CITEMP=1**: The interval to check the temperature for Alarm. (Unit: minute)
689 )))
690 )))
691
692 == 2.8 LED Indicator ==
693
694 (((
695 The LHT65N has a triple color LED which for easy shows different stage.
696 )))
697
698 (((
699 While pressing ACT button, the LED will work as per LED status with ACT button.
700 )))
701
702 (((
703 In a normal working state:
704 )))
705
706 * (((
707 For each uplink, the BLUE LED or RED LED will blink once.
708 )))
709 * (((
710 BLUE LED when an external sensor is connected
711 )))
712 * (((
713 RED LED when an external sensor is not connected
714 )))
715 * (((
716 For each success downlink, the PURPLE LED will blink once
717 )))
718
719 ----
720
721 == 2.9 Installation ==
722
723 [[image:image-20220516231650-1.png||height="436" width="428"]]
724
725 = 3. Sensors & Accessories =
726
727 == 3.1 E3 Temperature Probe ==
728
729 [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
730
731
732 With Temperature sensor with 2 meters cable long
733
734 * Resolution: 0.0625 °C
735 * ±0.5°C accuracy from -10°C to +85°C
736 * ±2°C accuracy from -55°C to +125°C
737 * Operating Range: -40 ~~ 125 °C
738 * -55°C to 125°C
739 * Working voltage 2.35v ~~ 5v
740
741 = 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
742
743 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
744
745 * AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
746 * LoRaWAN Downlink instruction for different platforms:
747
748 [[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]]
749
750 There are two kinds of commands to configure LHT65N, they are:
751
752 (% style="color:#4f81bd" %)* **General Commands**.
753
754 These commands are to configure:
755
756 * General system settings like: uplink interval.
757 * LoRaWAN protocol & radio-related commands.
758
759 They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki:
760
761 [[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
762
763 (% style="color:#4f81bd" %)* **Commands special design for LHT65N**
764
765 These commands are only valid for LHT65N, as below:
766
767 == 4.1 Set Transmit Interval Time ==
768
769 Feature: Change LoRaWAN End Node Transmit Interval.
770
771 **AT Command: AT+TDC**
772
773 [[image:image-20220523150701-2.png]]
774
775 **Downlink Command: 0x01**
776
777 Format: Command Code (0x01) followed by 3 bytes time value.
778
779 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
780
781 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
782 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
783
784 == 4.2 Set External Sensor Mode ==
785
786 Feature: Change External Sensor Mode.
787
788 **AT Command: AT+EXT**
789
790 [[image:image-20220523150759-3.png]]
791
792 **Downlink Command: 0xA2**
793
794 Total bytes: 2 ~~ 5 bytes
795
796 **Example:**
797
798 * 0xA201: Set external sensor type to E1
799 * 0xA209: Same as AT+EXT=9
800 * 0xA20702003c,Same as AT+SETCNT=60
801
802 == 4.3 Enable/Disable uplink Temperature probe ID ==
803
804 Feature: If PID is enabled, device will send the temperature probe ID on:
805
806 * First Packet after OTAA Join
807 * Every 24 hours since the first packet.
808
809 PID is default set to disable (0)
810
811 **AT Command:**
812
813 [[image:image-20220523150928-4.png]]
814
815 **Downlink Command:**
816
817 * 0xA800  **~-~->** AT+PID=0
818 * 0xA801     **~-~->** AT+PID=1
819
820 == 4.4 Set Password ==
821
822 Feature: Set device password, max 9 digits
823
824 **AT Command: AT+PWORD**
825
826 [[image:image-20220523151052-5.png]]
827
828 **Downlink Command:**
829
830 No downlink command for this feature.
831
832 == 4.5 Quit AT Command ==
833
834 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
835
836 **AT Command: AT+DISAT**
837
838 [[image:image-20220523151132-6.png]]
839
840 **Downlink Command:**
841
842 No downlink command for this feature.
843
844 == 4.6 Set to sleep mode ==
845
846 Feature: Set device to sleep mode
847
848 **AT Command: AT+SLEEP**
849
850 [[image:image-20220523151218-7.png]]
851
852 **Downlink Command:**
853
854 * There is no downlink command to set to Sleep mode.
855
856 == 4.7 Set system time ==
857
858 Feature: Set system time, unix format. [[See here for format detail.>>path:#TimeStamp]]
859
860 **AT Command:**
861
862 [[image:image-20220523151253-8.png]]
863
864 **Downlink Command:**
865
866 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
867
868 == 4.8 Set Time Sync Mode ==
869
870 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
871
872 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.
873
874 **AT Command:**
875
876 [[image:image-20220523151336-9.png]]
877
878 **Downlink Command:**
879
880 0x28 01 ~/~/ Same As AT+SYNCMOD=1
881
882 0x28 00 ~/~/ Same As AT+SYNCMOD=0
883
884 == 4.9 Set Time Sync Interval ==
885
886 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
887
888 **AT Command:**
889
890 [[image:image-20220523151411-10.png]]
891
892 **Downlink Command:**
893
894 0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
895
896 == 4.10 Print data entries base on page. ==
897
898 Feature: Print the sector data from start page to stop page (max is 416 pages).
899
900 **AT Command: AT+PDTA**
901
902 [[image:image-20220523151450-11.png]]
903
904 **Downlink Command:**
905
906 No downlink commands for feature
907
908 == 4.11 Print last few data entries. ==
909
910 Feature: Print the last few data entries
911
912 **AT Command: AT+PLDTA**
913
914 [[image:image-20220523151524-12.png]]
915
916 **Downlink Command:**
917
918 No downlink commands for feature
919
920 == 4.12 Clear Flash Record ==
921
922 Feature: Clear flash storage for data log feature.
923
924 **AT Command: AT+CLRDTA**
925
926 [[image:image-20220523151556-13.png]]
927
928 **Downlink Command: 0xA3**
929
930 * Example: 0xA301 ~/~/Same as AT+CLRDTA
931
932 = 5. Battery & How to replace =
933
934 == 5.1 Battery Type ==
935
936 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.
937
938 (((
939 The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
940 [[image:image-20220515075034-1.png||height="208" width="644"]]
941 )))
942
943 (((
944 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
945
946 )))
947
948 == 5.2 Replace Battery ==
949
950 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.
951
952 [[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
953
954 == 5.3 Battery Life Analyze ==
955
956 (((
957 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:
958 https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
959 )))
960
961 = 6. Order Info =
962
963 (((
964 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX**
965 )))
966
967 (((
968 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
969 )))
970
971 * (((
972 (% style="color:#4f81bd" %)** AS923**(%%): LoRaWAN AS923 band
973 )))
974 * (((
975 (% style="color:#4f81bd" %)** AU915**(%%): LoRaWAN AU915 band
976 )))
977 * (((
978 (% style="color:#4f81bd" %)** EU433**(%%): LoRaWAN EU433 band
979 )))
980 * (((
981 (% style="color:#4f81bd" %)** EU868**(%%): LoRaWAN EU868 band
982 )))
983 * (((
984 (% style="color:#4f81bd" %)** KR920**(%%): LoRaWAN KR920 band
985 )))
986 * (((
987 (% style="color:#4f81bd" %)** US915**(%%): LoRaWAN US915 band
988 )))
989 * (((
990 (% style="color:#4f81bd" %)** IN865**(%%): LoRaWAN IN865 band
991 )))
992 * (((
993 (% style="color:#4f81bd" %)** CN470**(%%): LoRaWAN CN470 band
994 )))
995
996 (((
997 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
998 )))
999
1000 * (((
1001 (% style="color:#4f81bd" %)**E3**(%%): External Temperature Probe
1002 )))
1003
1004 = 7. Packing Info =
1005
1006 (((
1007 **Package Includes**:
1008 )))
1009
1010 * (((
1011 LHT65N Temperature & Humidity Sensor x 1
1012 )))
1013 * (((
1014 Program cable x 1
1015 )))
1016 * (((
1017 Optional external sensor
1018 )))
1019
1020 (((
1021 **Dimension and weight**:
1022 )))
1023
1024 * (((
1025 Device Size:  13.5 x 7 x 3 cm
1026 )))
1027 * (((
1028 Device Weight: 105g
1029 )))
1030 * (((
1031 Package Size / pcs : 14.5 x 8 x 5 cm
1032 )))
1033 * (((
1034 Weight / pcs : 170g
1035 )))
1036
1037 = 8. FCC Warning =
1038
1039 (((
1040 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1041 )))
1042
1043 (((
1044 (1) This device may not cause harmful interference；
1045 )))
1046
1047 (((
1048 (2) this device must accept any interference received, including interference that may cause undesired operation.
1049 )))