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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**
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12
13
14 **Table of Contents：**
15
16 {{toc/}}
17
18
19
20 = 1.Introduction =
21
22 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
23
24 (((
25 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**(%%)**.**
26 )))
27
28 (((
29 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.
30 )))
31
32 (((
33 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
34 )))
35
36 (((
37 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
38 )))
39
40 (((
41 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.
42 )))
43
44 (((
45 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
46 )))
47
48 == 1.2 Features ==
49
50 * Wall mountable
51 * LoRaWAN v1.0.3 Class A protocol
52 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
53 * AT Commands to change parameters
54 * Remote configure parameters via LoRaWAN Downlink
55 * Firmware upgradeable via program port
56 * Built-in 2400mAh battery for up to 10 years of use.
57 * Built-in Temperature & Humidity sensor
58 * Optional External Sensors
59 * Tri-color LED to indicate working status
60 * Datalog feature
61
62 == 1.3 Specification ==
63
64 (((
65 **Built-in Temperature Sensor:**
66 )))
67
68 * (((
69 Resolution: 0.01 °C
70 )))
71 * (((
72 Accuracy Tolerance : Typ ±0.3 °C
73 )))
74 * (((
75 Long Term Drift: < 0.02 °C/yr
76 )))
77 * (((
78 Operating Range: -40 ~~ 85 °C
79 )))
80
81 (((
82 **Built-in Humidity Sensor:**
83 )))
84
85 * (((
86 Resolution: 0.04 %RH
87 )))
88 * (((
89 Accuracy Tolerance : Typ ±3 %RH
90 )))
91 * (((
92 Long Term Drift: < 0.02 °C/yr
93 )))
94 * (((
95 Operating Range: 0 ~~ 96 %RH
96 )))
97
98 (((
99 **External Temperature Sensor:**
100 )))
101
102 * (((
103 Resolution: 0.0625 °C
104 )))
105 * (((
106 ±0.5°C accuracy from -10°C to +85°C
107 )))
108 * (((
109 ±2°C accuracy from -55°C to +125°C
110 )))
111 * (((
112 Operating Range: -55 °C ~~ 125 °C
113 )))
114
115 = 2. Connect LHT65N to IoT Server =
116
117 == 2.1 How does LHT65N work? ==
118
119 (((
120 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.
121 )))
122
123 (((
124 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.
125 )))
126
127 == 2.2 How to Activate LHT65N? ==
128
129 The LHT65N has two working modes:
130
131 * **Deep Sleep Mode**: LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
132 * **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. 
133
134 (((
135 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
136 )))
137
138 [[image:image-20220515123819-1.png||height="379" width="317"]]
139
140 [[image:image-20220523153201-19.png||height="163" width="739"]]
141
142 == 2.3 Example to join LoRaWAN network ==
143
144 (% class="wikigeneratedid" %)
145 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.
146
147 (% class="wikigeneratedid" %)
148 [[image:image-20220522232442-1.png||height="387" width="648"]]
149
150 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:
151
152
153 === 2.3.1 Step 1: Create Device n TTN ===
154
155 Create a device in TTN V3 with the OTAA keys from LHT65N.
156
157 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
158
159 [[image:image-20220522232812-2.png||height="219" width="279"]]
160
161 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
162
163 Add APP EUI in the application.
164
165 [[image:image-20220522232916-3.png]]
166
167 [[image:image-20220522232932-4.png]]
168
169 [[image:image-20220522232954-5.png]]
170
171 Note: LHT65N use same payload as LHT65.
172
173 [[image:image-20220522233026-6.png]]
174
175
176 Input APP EUI,  APP KEY and DEV EUI:
177
178 [[image:image-20220522233118-7.png]]
179
180
181 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
182
183 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.
184
185 [[image:image-20220522233300-8.png||height="219" width="722"]]
186
187
188 == 2.4 Uplink Payload ==
189
190 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
191
192 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
193
194 (% border="1" style="background-color:#ffffcc; color:green; width:426px" %)
195 |(% style="width:97px" %)(((
196 **Size(bytes)**
197 )))|(% style="width:39px" %)(((
198 **2**
199 )))|(% style="width:100px" %)(((
200 **2**
201 )))|(% style="width:77px" %)(((
202 **2**
203 )))|(% style="width:47px" %)(((
204 **1**
205 )))|(% style="width:51px" %)(((
206 **4**
207 )))
208 |(% style="width:97px" %)(((
209 **Value**
210 )))|(% style="width:39px" %)(((
211 [[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]]
212 )))|(% style="width:100px" %)(((
213 (((
214 [[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]]
215 )))
216 )))|(% style="width:77px" %)(((
217 (((
218 [[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]]
219 )))
220
221 (((
222 [[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]]
223 )))
224 )))|(% style="width:47px" %)(((
225 [[Ext>>path:#Extension_Sensor]] #
226 )))|(% style="width:51px" %)(((
227 [[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]]
228 )))
229
230 * The First 6 bytes: has fix meanings for every LHT65N.
231 * The 7th byte (EXT #): defines the external sensor model.
232 * 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.)
233
234 === 2.4.1 Decoder in TTN V3 ===
235
236 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.
237
238 Below is the position to put the decoder and LHT65N decoder can be download from here:
239
240 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
241
242 [[image:image-20220522234118-10.png||height="353" width="729"]]
243
244 === 2.4.2 BAT-Battery Info ===
245
246 These two bytes of BAT include the battery state and the actually voltage
247
248 [[image:image-20220523152839-18.png]]
249
250 [[image:image-20220522235639-1.png||height="139" width="727"]]
251
252 Check the battery voltage for LHT65N.
253
254 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
255 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
256
257 === 2.4.3 Built-in Temperature ===
258
259 [[image:image-20220522235639-2.png||height="138" width="722"]]
260
261 * Temperature:  0x0ABB/100=27.47℃
262
263 [[image:image-20220522235639-3.png]]
264
265 * Temperature:  (0xF5C6-65536)/100=-26.18℃
266
267 === 2.4.4 Built-in Humidity ===
268
269 [[image:image-20220522235639-4.png||height="138" width="722"]]
270
271 * Humidity:    0x025C/10=60.4%
272
273 === 2.4.5 Ext # ===
274
275 Bytes for External Sensor:
276
277 [[image:image-20220523152822-17.png]]
278
279 === 2.4.6 Ext value ===
280
281 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
282
283 [[image:image-20220522235639-5.png]]
284
285 * DS18B20 temp=0x0ADD/100=27.81℃
286
287 The last 2 bytes of data are meaningless
288
289 [[image:image-20220522235639-6.png]]
290
291 * External temperature= (0xF54F-65536)/100=-27.37℃
292
293 (((
294 The last 2 bytes of data are meaningless
295 )))
296
297 (((
298 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
299 )))
300
301
302 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
303
304 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:
305
306 (% border="1" style="background-color:#ffffcc; color:green; width:510px" %)
307 |(% style="width:96px" %)(((
308 **Size(bytes)**
309 )))|(% style="width:71px" %)(((
310 **2**
311 )))|(% style="width:99px" %)(((
312 **2**
313 )))|(% style="width:132px" %)(((
314 **2**
315 )))|(% style="width:54px" %)(((
316 **1**
317 )))|(% style="width:64px" %)(((
318 **4**
319 )))
320 |(% style="width:96px" %)(((
321 **Value**
322 )))|(% style="width:71px" %)(((
323 [[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]]
324 )))|(% style="width:99px" %)(((
325 (((
326 [[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]]
327 )))
328
329 (((
330 [[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]]
331 )))
332 )))|(% style="width:132px" %)(((
333 (((
334 BAT Status &
335 )))
336
337 (((
338 [[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]]
339 )))
340 )))|(% style="width:54px" %)(((
341 Status & Ext
342 )))|(% style="width:64px" %)(((
343 (((
344 [[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]]
345 )))
346 )))
347
348 * **Battery status & (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)Built-in Humidity(%%)**
349
350 (% border="1" style="background-color:#ffffcc; color:green; width:469px" %)
351 |(% style="width:65px" %)Bit(bit)|(% style="width:267px" %)[15:14]|(% style="width:134px" %)[11:0]
352 |(% style="width:65px" %)Value|(% style="width:267px" %)(((
353 BAT Status
354
355 00(b): Ultra Low ( BAT <= 2.50v)
356
357 01(b): Low  (2.50v <=BAT <= 2.55v)
358
359 10(b): OK   (2.55v <= BAT <=2.65v)
360
361 11(b): Good   (BAT >= 2.65v)
362 )))|(% style="width:134px" %)(((
363 [[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]]
364
365
366 )))
367
368 * **Status & Ext Byte**
369
370 [[image:image-20220523152434-16.png]]
371
372 * Poll Message Flag: 1: This message is a poll message reply, 0: means this is a normal uplink.
373 * 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.
374 * 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)
375
376 == 2.5 Show data on Datacake ==
377
378 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:
379
380 (((
381 **Step 1**: Be sure that your device is programmed and properly connected to the LoRaWAN network.
382 )))
383
384 (((
385 **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.
386 )))
387
388 (((
389 Add Datacake:
390 )))
391
392 [[image:image-20220523000825-7.png||height="262" width="583"]]
393
394
395 Select default key as Access Key:
396
397 [[image:image-20220523000825-8.png||height="453" width="406"]]
398
399 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
400
401 [[image:image-20220523000825-9.png||height="366" width="392"]]
402
403 [[image:image-20220523000825-10.png||height="413" width="728"]]
404
405 == 2.6 Datalog Feature ==
406
407 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.
408
409 === 2.6.1 Unix TimeStamp ===
410
411 LHT65N uses Unix TimeStamp format based on
412
413 [[image:image-20220523001219-11.png||height="97" width="627"]]
414
415
416 (((
417 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
418 )))
419
420 (((
421 Below is the converter example
422 )))
423
424 [[image:image-20220523001219-12.png||height="298" width="720"]]
425
426 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
427
428 === 2.6.2 Set Device Time ===
429
430 (((
431 There are two ways to set device’s time:
432 )))
433
434 (((
435 **~1. Through LoRaWAN MAC Command (Default settings)**
436 )))
437
438 (((
439 User need to set SYNCMOD=1 to enable sync time via MAC command.
440 )))
441
442 (((
443 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).
444 )))
445
446 (((
447 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.
448 )))
449
450 (((
451
452 )))
453
454 (((
455 **2. Manually Set Time**
456 )))
457
458 (((
459 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
460 )))
461
462 === 2.6.3 Poll sensor value ===
463
464 User can poll sensor value based on timestamps from the server. Below is the downlink command.
465
466 [[image:image-20220523152302-15.png]]
467
468 (((
469 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.
470 )))
471
472 (((
473 For example, downlink command **31 5FC5F350 5FC6 0160 05**
474 )))
475
476 (((
477 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
478 )))
479
480 (((
481 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
482 )))
483
484
485 === 2.6.4 Datalog Uplink payload ===
486
487 The Datalog poll reply uplink will use below payload format.
488
489 (((
490 **Retrieval data payload**
491 )))
492
493 (% border="1" style="background-color:#ffffcc; color:green; width:510px" %)
494 |(% style="width:93px" %)(((
495 (((
496 **Size(bytes)**
497 )))
498 )))|(% style="width:71px" %)(((
499 (((
500 **2**
501 )))
502 )))|(% style="width:102px" %)(((
503 (((
504 **2**
505 )))
506 )))|(% style="width:86px" %)(((
507 (((
508 **2**
509 )))
510 )))|(% style="width:86px" %)(((
511 (((
512 **1**
513 )))
514 )))|(% style="width:48px" %)(((
515 (((
516 **4**
517 )))
518 )))
519 |(% style="width:93px" %)(((
520 (((
521 **Value**
522 )))
523 )))|(% style="width:71px" %)(((
524 (((
525 [[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]]
526 )))
527 )))|(% style="width:102px" %)(((
528 (((
529 (((
530 [[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]]
531 )))
532 )))
533
534 (((
535 (((
536 [[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]]
537 )))
538 )))
539 )))|(% style="width:86px" %)(((
540 (((
541 (((
542 [[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]]
543 )))
544 )))
545
546 (((
547 (((
548 [[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]]
549 )))
550 )))
551 )))|(% style="width:86px" %)(((
552 (((
553 [[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]]
554 )))
555 )))|(% style="width:48px" %)(((
556 (((
557 (((
558 [[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]]
559 )))
560 )))
561
562 (((
563 (((
564
565 )))
566 )))
567 )))
568
569 **Poll message flag & Ext**
570
571 [[image:image-20220523152208-14.png]]
572
573 (((
574 (((
575 Poll Message Flag: 1: This message is a poll message reply.
576 )))
577 )))
578
579 * (((
580 (((
581 Poll Message Flag is set to 1.
582 )))
583 )))
584 * (((
585 (((
586 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
587 )))
588 )))
589
590 (((
591 (((
592 For example, in US915 band, the max payload for different DR is:
593 )))
594 )))
595
596 (((
597 (((
598 a) DR0: max is 11 bytes so one entry of data
599 )))
600 )))
601
602 (((
603 (((
604 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
605 )))
606 )))
607
608 (((
609 (((
610 c) DR2: total payload includes 11 entries of data
611 )))
612 )))
613
614 (((
615 (((
616 d) DR3: total payload includes 22 entries of data.
617 )))
618 )))
619
620 (((
621 (((
622 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
623 )))
624 )))
625
626
627 **Example:**
628
629 If LHT65N has below data inside Flash:
630
631 [[image:image-20220523144455-1.png||height="335" width="735"]]
632
633 (((
634 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
635 )))
636
637 (((
638 Where : Start time: 60065F97 = time 21/1/19 04:27:03
639 )))
640
641 (((
642 Stop time 60066DA7= time 21/1/19 05:27:03
643 )))
644
645 (((
646
647 )))
648
649 (((
650 LHT65N will uplink this payload.
651 )))
652
653 [[image:image-20220523001219-13.png||height="421" width="727"]]
654
655 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
656
657 Where the first 11 bytes is for the first entry:
658
659 7FFF089801464160065F97
660
661 Ext sensor data=0x7FFF/100=327.67
662
663 Temp=0x0898/100=22.00
664
665 Hum=0x0146/10=32.6
666
667 poll message flag & Ext=0x41,means reply data,Ext=1
668
669 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
670
671 == 2.7 Alarm Mode ==
672
673 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.
674
675 (((
676 (% 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.
677 )))
678
679 (((
680 **AT Commands for Alarm mode:**
681 )))
682
683 (% class="box infomessage" %)
684 (((
685 (((
686 **AT+WMOD=1**: Enable/Disable Alarm Mode. (0:Disable, 1: Enable)
687 )))
688 )))
689
690 (% class="box infomessage" %)
691 (((
692 (((
693 **AT+CITEMP=1**: The interval to check the temperature for Alarm. (Unit: minute)
694 )))
695 )))
696
697 == 2.8 LED Indicator ==
698
699 (((
700 The LHT65N has a triple color LED which for easy shows different stage.
701 )))
702
703 (((
704 While pressing ACT button, the LED will work as per LED status with ACT button.
705 )))
706
707 (((
708 In a normal working state:
709 )))
710
711 * (((
712 For each uplink, the BLUE LED or RED LED will blink once.
713 )))
714 * (((
715 BLUE LED when an external sensor is connected
716 )))
717 * (((
718 RED LED when an external sensor is not connected
719 )))
720 * (((
721 For each success downlink, the PURPLE LED will blink once
722 )))
723
724 ----
725
726 == 2.9 Installation ==
727
728 [[image:image-20220516231650-1.png||height="436" width="428"]]
729
730 = 3. Sensors & Accessories =
731
732 == 3.1 E3 Temperature Probe ==
733
734 [[image:image-20220515080154-4.png||height="182" width="161"]] [[image:image-20220515080330-5.png||height="201" width="195"]]
735
736
737 With Temperature sensor with 2 meters cable long
738
739 * Resolution: 0.0625 °C
740 * ±0.5°C accuracy from -10°C to +85°C
741 * ±2°C accuracy from -55°C to +125°C
742 * Operating Range: -40 ~~ 125 °C
743 * -55°C to 125°C
744 * Working voltage 2.35v ~~ 5v
745
746 = 4. Configure LHT65N via AT Command or LoRaWAN Downlink =
747
748 (((
749 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
750 )))
751
752 * (((
753 AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].
754 )))
755 * (((
756 LoRaWAN Downlink instruction for different platforms:
757 )))
758
759 (((
760 [[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]]
761 )))
762
763 (((
764 There are two kinds of commands to configure LHT65N, they are:
765 )))
766
767 (((
768 (% style="color:#4f81bd" %)* **General Commands**.
769 )))
770
771 (((
772 These commands are to configure:
773 )))
774
775 * (((
776 General system settings like: uplink interval.
777 )))
778 * (((
779 LoRaWAN protocol & radio-related commands.
780 )))
781
782 (((
783 They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki:
784 )))
785
786 (((
787 [[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]
788 )))
789
790 (((
791 (% style="color:#4f81bd" %)* **Commands special design for LHT65N**
792 )))
793
794 (((
795 These commands are only valid for LHT65N, as below:
796 )))
797
798 == 4.1 Set Transmit Interval Time ==
799
800 Feature: Change LoRaWAN End Node Transmit Interval.
801
802 **AT Command: AT+TDC**
803
804 [[image:image-20220523150701-2.png]]
805
806 (((
807 **Downlink Command: 0x01**
808 )))
809
810 (((
811 Format: Command Code (0x01) followed by 3 bytes time value.
812 )))
813
814 (((
815 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
816 )))
817
818 * (((
819 **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
820 )))
821 * (((
822 **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
823 )))
824
825 == 4.2 Set External Sensor Mode ==
826
827 Feature: Change External Sensor Mode.
828
829 **AT Command: AT+EXT**
830
831 [[image:image-20220523150759-3.png]]
832
833 (((
834 **Downlink Command: 0xA2**
835 )))
836
837 (((
838 Total bytes: 2 ~~ 5 bytes
839 )))
840
841 (((
842 **Example:**
843 )))
844
845 * (((
846 0xA201: Set external sensor type to E1
847 )))
848 * (((
849 0xA209: Same as AT+EXT=9
850 )))
851 * (((
852 0xA20702003c,Same as AT+SETCNT=60
853 )))
854
855 == 4.3 Enable/Disable uplink Temperature probe ID ==
856
857 Feature: If PID is enabled, device will send the temperature probe ID on:
858
859 * First Packet after OTAA Join
860 * Every 24 hours since the first packet.
861
862 PID is default set to disable (0)
863
864 **AT Command:**
865
866 [[image:image-20220523150928-4.png]]
867
868 **Downlink Command:**
869
870 * 0xA800  **~-~->** AT+PID=0
871 * 0xA801     **~-~->** AT+PID=1
872
873 == 4.4 Set Password ==
874
875 Feature: Set device password, max 9 digits
876
877 **AT Command: AT+PWORD**
878
879 [[image:image-20220523151052-5.png]]
880
881 (((
882 **Downlink Command:**
883 )))
884
885 (((
886 No downlink command for this feature.
887 )))
888
889 == 4.5 Quit AT Command ==
890
891 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
892
893 **AT Command: AT+DISAT**
894
895 [[image:image-20220523151132-6.png]]
896
897 **Downlink Command:**
898
899 No downlink command for this feature.
900
901 == 4.6 Set to sleep mode ==
902
903 Feature: Set device to sleep mode
904
905 **AT Command: AT+SLEEP**
906
907 [[image:image-20220523151218-7.png]]
908
909 **Downlink Command:**
910
911 * There is no downlink command to set to Sleep mode.
912
913 == 4.7 Set system time ==
914
915 Feature: Set system time, unix format. [[See here for format detail.>>path:#TimeStamp]]
916
917 **AT Command:**
918
919 [[image:image-20220523151253-8.png]]
920
921 **Downlink Command:**
922
923 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
924
925 == 4.8 Set Time Sync Mode ==
926
927 (((
928 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
929 )))
930
931 (((
932 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.
933 )))
934
935 (((
936 **AT Command:**
937 )))
938
939 [[image:image-20220523151336-9.png]]
940
941 **Downlink Command:**
942
943 0x28 01 ~/~/ Same As AT+SYNCMOD=1
944
945 0x28 00 ~/~/ Same As AT+SYNCMOD=0
946
947 == 4.9 Set Time Sync Interval ==
948
949 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
950
951 **AT Command:**
952
953 [[image:image-20220523151411-10.png]]
954
955 **Downlink Command:**
956
957 0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
958
959 == 4.10 Print data entries base on page. ==
960
961 Feature: Print the sector data from start page to stop page (max is 416 pages).
962
963 **AT Command: AT+PDTA**
964
965 [[image:image-20220523151450-11.png]]
966
967 **Downlink Command:**
968
969 No downlink commands for feature
970
971 == 4.11 Print last few data entries. ==
972
973 Feature: Print the last few data entries
974
975 **AT Command: AT+PLDTA**
976
977 [[image:image-20220523151524-12.png]]
978
979 **Downlink Command:**
980
981 No downlink commands for feature
982
983 == 4.12 Clear Flash Record ==
984
985 Feature: Clear flash storage for data log feature.
986
987 **AT Command: AT+CLRDTA**
988
989 [[image:image-20220523151556-13.png]]
990
991 **Downlink Command: 0xA3**
992
993 * Example: 0xA301 ~/~/Same as AT+CLRDTA
994
995 = 5. Battery & How to replace =
996
997 == 5.1 Battery Type ==
998
999 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.
1000
1001 (((
1002 The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
1003 [[image:image-20220515075034-1.png||height="208" width="644"]]
1004 )))
1005
1006 (((
1007 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1008
1009 )))
1010
1011 == 5.2 Replace Battery ==
1012
1013 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.
1014
1015 [[image:image-20220515075440-2.png||height="338" width="272"]][[image:image-20220515075625-3.png||height="193" width="257"]]
1016
1017 == 5.3 Battery Life Analyze ==
1018
1019 (((
1020 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:
1021 https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf
1022 )))
1023
1024 = 6. Order Info =
1025
1026 (((
1027 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1028 )))
1029
1030 (((
1031 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1032 )))
1033
1034 * (((
1035 (% style="color:#4f81bd" %)** AS923**(%%): LoRaWAN AS923 band
1036 )))
1037 * (((
1038 (% style="color:#4f81bd" %)** AU915**(%%): LoRaWAN AU915 band
1039 )))
1040 * (((
1041 (% style="color:#4f81bd" %)** EU433**(%%): LoRaWAN EU433 band
1042 )))
1043 * (((
1044 (% style="color:#4f81bd" %)** EU868**(%%): LoRaWAN EU868 band
1045 )))
1046 * (((
1047 (% style="color:#4f81bd" %)** KR920**(%%): LoRaWAN KR920 band
1048 )))
1049 * (((
1050 (% style="color:#4f81bd" %)** US915**(%%): LoRaWAN US915 band
1051 )))
1052 * (((
1053 (% style="color:#4f81bd" %)** IN865**(%%): LoRaWAN IN865 band
1054 )))
1055 * (((
1056 (% style="color:#4f81bd" %)** CN470**(%%): LoRaWAN CN470 band
1057 )))
1058
1059 (((
1060 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1061 )))
1062
1063 * (((
1064 (% style="color:#4f81bd" %)**E3**(%%): External Temperature Probe
1065 )))
1066
1067 = 7. Packing Info =
1068
1069 (((
1070 **Package Includes**:
1071 )))
1072
1073 * (((
1074 LHT65N Temperature & Humidity Sensor x 1
1075 )))
1076 * (((
1077 Program cable x 1
1078 )))
1079 * (((
1080 Optional external sensor
1081 )))
1082
1083 (((
1084 **Dimension and weight**:
1085 )))
1086
1087 * (((
1088 Device Size:  13.5 x 7 x 3 cm
1089 )))
1090 * (((
1091 Device Weight: 105g
1092 )))
1093 * (((
1094 Package Size / pcs : 14.5 x 8 x 5 cm
1095 )))
1096 * (((
1097 Weight / pcs : 170g
1098 )))
1099
1100 = 8. FCC Warning =
1101
1102 (((
1103 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1104 )))
1105
1106 (((
1107 (1) This device may not cause harmful interference；
1108 )))
1109
1110 (((
1111 (2) this device must accept any interference received, including interference that may cause undesired operation.
1112 )))