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Version 224.1 by Bei Jinggeng on 2022/12/02 15:53
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
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6
7
8 **Table of Contents：**
9
10 {{toc/}}
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14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 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.**
23 )))
24
25 (((
26 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.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46 == 1.2 Features ==
47
48
49 * Wall mountable
50 * LoRaWAN v1.0.3 Class A protocol
51 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
52 * AT Commands to change parameters
53 * Remote configure parameters via LoRaWAN Downlink
54 * Firmware upgradeable via program port
55 * Built-in 2400mAh battery for up to 10 years of use.
56 * Built-in Temperature & Humidity sensor
57 * Optional External Sensors
58 * Tri-color LED to indicate working status
59 * Datalog feature (Max 3328 records)
60
61
62 == 1.3 Specification ==
63
64
65 (% style="color:#037691" %)**Built-in Temperature Sensor:**
66
67 * Resolution: 0.01 °C
68 * Accuracy Tolerance : Typ ±0.3 °C
69 * Long Term Drift: < 0.02 °C/yr
70 * Operating Range: -40 ~~ 85 °C
71
72 (% style="color:#037691" %)**Built-in Humidity Sensor:**
73
74 * Resolution: 0.04 %RH
75 * Accuracy Tolerance : Typ ±3 %RH
76 * Long Term Drift: < 0.02 °C/yr
77 * Operating Range: 0 ~~ 96 %RH
78
79 (% style="color:#037691" %)**External Temperature Sensor:**
80
81 * Resolution: 0.0625 °C
82 * ±0.5°C accuracy from -10°C to +85°C
83 * ±2°C accuracy from -55°C to +125°C
84 * Operating Range: -55 °C ~~ 125 °C
85
86
87 = 2. Connect LHT65N to IoT Server =
88
89 == 2.1 How does LHT65N work? ==
90
91
92 (((
93 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.
94 )))
95
96 (((
97 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.
98 )))
99
100
101 == 2.2 How to Activate LHT65N? ==
102
103
104 (((
105 The LHT65N has two working modes:
106 )))
107
108 * (((
109 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
110 )))
111 * (((
112 (% style="color:blue" %)**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, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
113 )))
114
115 (((
116 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
117 )))
118
119
120 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
121
122 [[image:image-20220525110604-2.png||_mstalt="427531"]]
123
124
125 == 2.3 Example to join LoRaWAN network ==
126
127
128 (% class="wikigeneratedid" %)
129 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.
130
131
132 (% class="wikigeneratedid" %)
133 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
134
135
136 (((
137 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
138 )))
139
140
141 === 2.3.1 Step 1: Create Device n TTN ===
142
143
144 (((
145 Create a device in TTN V3 with the OTAA keys from LHT65N.
146 )))
147
148 (((
149 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
150 )))
151
152 [[image:image-20220617150003-1.jpeg||_mstalt="5426434"]]
153
154 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
155
156 Add APP EUI in the application.
157
158
159 [[image:image-20220522232916-3.png||_mstalt="430495"]]
160
161
162 [[image:image-20220522232932-4.png||_mstalt="430157"]]
163
164
165 [[image:image-20220522232954-5.png||_mstalt="431847"]]
166
167
168
169 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
170
171
172 [[image:image-20220522233026-6.png||_mstalt="429403"]]
173
174
175 Input APP EUI,  APP KEY and DEV EUI:
176
177
178 [[image:image-20220522233118-7.png||_mstalt="430430"]]
179
180
181 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
182
183
184 (((
185 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.
186 )))
187
188 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
189
190
191 == 2.4 Uplink Payload   ( Fport~=2) ==
192
193
194 (((
195 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
196 )))
197
198 (((
199 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
200 )))
201
202 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
203 |=(% style="width: 60px;" %)(((
204 **Size(bytes)**
205 )))|=(% style="width: 30px;" %)(((
206 **2**
207 )))|=(% style="width: 100px;" %)(((
208 **2**
209 )))|=(% style="width: 100px;" %)(((
210 **2**
211 )))|=(% style="width: 50px;" %)(((
212 **1**
213 )))|=(% style="width: 50px;" %)(((
214 **4**
215 )))
216 |(% style="width:97px" %)(((
217 **Value**
218 )))|(% style="width:39px" %)(((
219 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
220 )))|(% style="width:100px" %)(((
221 (((
222 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
223 )))
224 )))|(% style="width:77px" %)(((
225 (((
226 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
227 )))
228 )))|(% style="width:47px" %)(((
229 [[Ext>>||anchor="H2.4.5Ext23"]] #
230 )))|(% style="width:51px" %)(((
231 [[Ext value>>||anchor="H2.4.6Extvalue"]]
232 )))
233
234 * The First 6 bytes: has fix meanings for every LHT65N.
235 * The 7th byte (EXT #): defines the external sensor model.
236 * 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.)
237
238
239 === 2.4.1 Decoder in TTN V3 ===
240
241
242 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.
243
244 Below is the position to put the decoder and LHT65N decoder can be download from here: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
245
246
247 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
248
249
250 === 2.4.2 BAT-Battery Info ===
251
252
253 These two bytes of BAT include the battery state and the actually voltage
254
255 [[image:image-20220523152839-18.png||_mstalt="457613"]]
256
257
258 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
259
260
261 Check the battery voltage for LHT65N.
262
263 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
264 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
265
266
267 === 2.4.3 Built-in Temperature ===
268
269
270 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
271
272 * Temperature:  0x0ABB/100=27.47℃
273
274 [[image:image-20220522235639-3.png||_mstalt="432120"]]
275
276 * Temperature:  (0xF5C6-65536)/100=-26.18℃
277
278
279 === 2.4.4 Built-in Humidity ===
280
281
282 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
283
284 * Humidity:    0x025C/10=60.4%
285
286
287 === 2.4.5 Ext # ===
288
289
290 Bytes for External Sensor:
291
292 [[image:image-20220523152822-17.png||_mstalt="454545"]]
293
294
295 === 2.4.6 Ext value ===
296
297 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
298
299
300 [[image:image-20220522235639-5.png||_mstalt="432848"]]
301
302
303 * DS18B20 temp=0x0ADD/100=27.81℃
304
305 The last 2 bytes of data are meaningless
306
307
308
309 [[image:image-20220522235639-6.png||_mstalt="433212"]]
310
311
312 * External temperature= (0xF54F-65536)/100=-27.37℃
313
314 The last 2 bytes of data are meaningless
315
316 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
317
318
319 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
320
321
322 (((
323 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:
324 )))
325
326 (((
327
328 )))
329
330 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
331 |=(% style="width: 50px;" %)(((
332 **Size(bytes)**
333 )))|=(% style="width: 70px;" %)(((
334 **2**
335 )))|=(% style="width: 120px;" %)(((
336 **2**
337 )))|=(% style="width: 120px;" %)(((
338 **2**
339 )))|=(% style="width: 50px;" %)(((
340 **1**
341 )))|=(% style="width: 70px;" %)(((
342 **4**
343 )))
344 |(% style="width:110px" %)(((
345 **Value**
346 )))|(% style="width:71px" %)(((
347 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
348 )))|(% style="width:99px" %)(((
349 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
350 )))|(% style="width:132px" %)(((
351 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
352 )))|(% style="width:54px" %)(((
353 Status & Ext
354 )))|(% style="width:64px" %)(((
355 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
356 )))
357
358 * **Battery status & Built-in Humidity**
359
360 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
361 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
362 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
363 BAT Status
364 00(b): Ultra Low ( BAT <= 2.50v)
365 01(b): Low  (2.50v <=BAT <= 2.55v)
366 10(b): OK   (2.55v <= BAT <=2.65v)
367 11(b): Good   (BAT >= 2.65v)
368 )))|(% style="width:132px" %)(((
369 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
370 )))
371
372 * **Status & Ext Byte**
373
374 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
375 |=(% scope="row" style="width: 60px;" %)**Bits**|(% style="width:90px" %)**7**|(% style="width:100px" %)**6**|(% style="width:90px" %)**5**|(% style="width:100px" %)**4**|(% style="width:60px" %)**[3:0]**
376 |=(% style="width: 96px;" %)**Status&Ext**|(% style="width:124px" %)None-ACK Flag|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
377
378 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
379 * (% style="color:blue" %)**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.
380 * (% style="color:blue" %)**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)
381
382
383 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
384
385
386 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
387
388 be used to power the external ADC sensor; user can control the power on time for this
389
390 (% style="color:blue" %)**sensor by setting:**
391
392 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
393
394 **For example:**
395
396 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
397
398
399 Or use **downlink command A2** to set the same.
400
401 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
402
403 When the measured output voltage of the sensor is not within the range of 0.1V and 1.1V, the output voltage terminal of the sensor shall be divided The example in the following figure is to reduce the output voltage of the sensor by three times If it is necessary to reduce more times, calculate according to the formula in the figure and connect the corresponding resistance in series.
404
405 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
406
407
408 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
409
410 [[image:image-20220628150714-4.png||_mstalt="431054"]]
411
412
413 When the voltage collected by ADC_IN1 is less than the minimum range, the minimum range will be used as the output; Similarly, when the collected voltage is greater than the maximum range, the maximum range will be used as the output.
414
415
416 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
417
418 [[image:image-20220628151005-5.png||_mstalt="429546"]]
419
420
421 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
422
423 [[image:image-20220628151056-6.png||_mstalt="431873"]]
424
425
426 3) Within range
427
428 [[image:image-20220628151143-7.png||_mstalt="431210"]]
429
430
431 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
432
433
434 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
435
436
437 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
438
439 [[image:image-20220906102307-7.png||_mstalt="430443"]]
440
441
442 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
443
444 The external cable NE2 can be use for MOD4 and MOD8
445
446
447 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
448
449
450 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
451
452
453 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
454
455 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
456
457 In Open State, the power consumption is the same as if there is no probe
458
459 In Close state, the power consumption will be 3uA higher than normal.
460
461 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
462
463
464 Ext=4,Interrupt Sensor：
465
466 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
467 |(% style="width:101px" %)(((
468 AT+EXT=4,1
469 )))|(% style="width:373px" %)(((
470 Sent uplink packet in both rising and falling interrupt
471 )))
472 |(% style="width:101px" %)(((
473 AT+EXT=4,2
474 )))|(% style="width:373px" %)(((
475 Sent uplink packet only in falling interrupt
476 )))
477 |(% style="width:101px" %)(((
478 AT+EXT=4,3
479 )))|(% style="width:373px" %)(((
480 Sent uplink packet only in rising interrupt
481 )))
482
483 Trigger by falling edge:
484
485 [[image:image-20220906101145-2.png||_mstalt="428324"]]
486
487
488 Trigger by raising edge：
489
490 [[image:image-20220906101145-3.png||_mstalt="428688"]]
491
492
493 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
494
495
496 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
497
498
499 (% style="color:blue" %)**Case 1**(%%):  Low power consumption Flow Sensor, such flow sensor has pulse output and the power consumption in uA level and can be powered by LHT65N.
500
501 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
502
503
504 (% style="color:blue" %)**Case 2**(%%):  Normal Flow Sensor: Such flow sensor has higher power consumption and is not suitable to be powered by LHT65N. It is powered by external power and output <3.3v pulse
505
506 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
507
508
509 Ext=8, Counting Sensor ( 4 bytes)：
510
511 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
512 |(% style="width:138px" %)(((
513 AT+EXT=8,0
514 )))|(% style="width:240px" %)(((
515 Count at falling interrupt
516 )))
517 |(% style="width:138px" %)(((
518 AT+EXT=8,1
519 )))|(% style="width:240px" %)(((
520 Count at rising interrupt
521 )))
522 |(% style="width:138px" %)(((
523 AT+SETCNT=60
524 )))|(% style="width:240px" %)(((
525 Sent current count to 60
526 )))
527
528 [[image:image-20220906101320-6.png||_mstalt="428064"]]
529
530
531 (% style="color:blue" %)**A2 downlink Command：**
532
533 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
534
535 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
536
537 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
538
539 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
540
541 A2 08 02 00 00 00 3C:  Same as AT+ SETCNT=60  (AT+ SETCNT = 4th byte and 5th byte and 6th byte and 7th byte)
542
543
544 == 2.5 Show data on Datacake ==
545
546
547 (((
548 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:
549 )))
550
551 (((
552
553 )))
554
555 (((
556 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
557 )))
558
559 (((
560 (% style="color:blue" %)**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.
561 )))
562
563 (((
564
565 )))
566
567 (((
568 Add Datacake:
569 )))
570
571
572 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
573
574
575
576 Select default key as Access Key:
577
578
579 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
580
581
582 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
583
584
585 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
586
587
588 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
589
590
591 == 2.6 Datalog Feature ==
592
593
594 (((
595 Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, LHT65N will store the reading for future retrieving purposes. There are two ways for IoT servers to get datalog from LHT65N.
596 )))
597
598
599 === 2.6.1 Ways to get datalog via LoRaWAN ===
600
601
602 There are two methods:
603
604 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
605
606
607 (% style="color:blue" %)**Method 2: **(%%)Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
608
609
610 (% style="color:red" %)**Note for method 2:**
611
612 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
613 * b) LHT65N will send data in **CONFIRMED Mode** when PNACKMD=1, but LHT65N won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if LHT65N gets a ACK, LHT65N will consider there is a network connection and resend all NONE-ACK Message.
614
615 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
616
617
618 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
619
620
621 === 2.6.2 Unix TimeStamp ===
622
623
624 LHT65N uses Unix TimeStamp format based on
625
626
627 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
628
629
630
631 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
632
633 Below is the converter example
634
635 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
636
637
638 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
639
640
641 === 2.6.3 Set Device Time ===
642
643
644 (((
645 (% style="color:blue" %)**There are two ways to set device's time:**
646 )))
647
648 (((
649 **1.  Through LoRaWAN MAC Command (Default settings)**
650 )))
651
652 (((
653 User need to set SYNCMOD=1 to enable sync time via MAC command.
654 )))
655
656 (((
657 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).
658 )))
659
660 (((
661 (% style="color:red" %)**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.**
662 )))
663
664
665
666 (((
667 **2. Manually Set Time**
668 )))
669
670 (((
671 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
672 )))
673
674
675 === 2.6.4 Poll sensor value ===
676
677
678 User can poll sensor value based on timestamps from the server. Below is the downlink command.
679
680 [[image:image-20220523152302-15.png||_mstalt="451581"]]
681
682
683 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.
684
685 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
686
687 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
688
689 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
690
691
692 === 2.6.5 Datalog Uplink payload ===
693
694
695 The Datalog poll reply uplink will use below payload format.
696
697 **Retrieval data payload:**
698
699 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
700 |=(% style="width: 60px;" %)(((
701 **Size(bytes)**
702 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
703 |(% style="width:97px" %)**Value**|(% style="width:123px" %)[[External sensor data>>||anchor="H2.4.6Extvalue"]]|(% style="width:108px" %)[[Built In Temperature>>||anchor="H2.4.3Built-inTemperature"]]|(% style="width:133px" %)[[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]|(% style="width:159px" %)Poll message flag & Ext|(% style="width:80px" %)[[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
704
705 **Poll message flag & Ext:**
706
707 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
708
709 (% style="color:blue" %)**No ACK Message**(%%):  1: This message means this payload is fromn Uplink Message which doesn't get ACK from the server before ( for [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]] feature)
710
711 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
712
713 * Poll Message Flag is set to 1.
714
715 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
716
717 For example, in US915 band, the max payload for different DR is:
718
719 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
720
721 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
722
723 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
724
725 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
726
727 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
728
729
730 **Example:**
731
732 If LHT65N has below data inside Flash:
733
734 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
735
736
737 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
738
739 Where : Start time: 60065F97 = time 21/1/19 04:27:03
740
741 Stop time: 60066DA7= time 21/1/19 05:27:03
742
743
744 **LHT65N will uplink this payload.**
745
746 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
747
748
749 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
750
751 Where the first 11 bytes is for the first entry:
752
753 7FFF089801464160065F97
754
755 Ext sensor data=0x7FFF/100=327.67
756
757 Temp=0x088E/100=22.00
758
759 Hum=0x014B/10=32.6
760
761 poll message flag & Ext=0x41,means reply data,Ext=1
762
763 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
764
765
766 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
767
768
769 (((
770 when the device is in alarm mode, it checks the built-in sensor temperature for a short time. if the temperature exceeds the preconfigured range, it sends an uplink immediately.
771 )))
772
773 (((
774 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
775
776
777 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
778
779
780 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
781
782 (((
783 (% class="box infomessage" %)
784 (((
785 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
786
787 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
788
789 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
790
791 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
792
793 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
794
795 **AT+LEDALARM=1** :       Enable LED visual Alarm.
796 )))
797 )))
798
799 (% style="color:#4f81bd" %)**Downlink Command:**
800
801 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
802
803 AT+CITEMP=1 : A60001
804
805 AT+ARTEMP=1,60  :  A70001003C
806
807 AT+ARTEMP=-16,60 :  A7FFF0003C
808
809 AT+LEDALARM=1  :  3601
810
811
812 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
813
814 Total bytes: 8 bytes
815
816 **Example: **AA0100010001003C
817
818 WMOD=01
819
820 CITEMP=0001
821
822 TEMPlow=0001
823
824 TEMPhigh=003C
825
826
827 **DS18B20 and TMP117 Threshold Alarm**
828
829 **~ AT+WMOD=1,60,-10,20**
830
831 (% style="color:#4f81bd" %)**Downlink Command:**
832
833 **Example: **A5013CFC180014
834
835 MOD=01
836
837 CITEMP=3C(S)
838
839 TEMPlow=FC18
840
841 TEMPhigh=0014
842
843
844 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
845
846 **AT+WMOD=2,60,5** 
847
848 (% style="color:#4f81bd" %)**Downlink Command:**
849
850 **Example: **A5023C05
851
852 MOD=02
853
854 CITEMP=3C(S)
855
856 temperature fluctuation=05
857
858
859 ==== **Sampling multiple times and uplink together** ====
860
861 **AT+WMOD=3,1,60,20,-16,32,1**   
862
863 Explain:
864
865 * Set Working Mode to **Mode 3**
866 * Sampling Interval is **60**s.
867 * When there is **20** sampling dats, Device will send these data via one uplink. (max value is 60, means max 60 sampling in one uplink)
868 * Temperature alarm range is **-16** to **32**°C,
869 * **1** to enable temperature alarm, **0** to disable the temperature alarm. If alarm is enabled, a data will be sent immediately  if temperate exceeds the Alarm range.
870
871 (% style="color:#4f81bd" %)**Downlink Command:**
872
873 **Example: **A50301003C14FFF0002001
874
875 MOD=03
876
877 EXT=01
878
879 CITEMP=003C(S)
880
881 Total number of acquisitions=14
882
883 TEMPlow=FFF0
884
885 TEMPhigh=0020
886
887 ARTEMP=01
888
889
890 **Uplink payload( Fport=3)**
891
892 **Example: CBEA**01**0992**//0A41//**09C4**
893
894 BatV=CBEA
895
896 EXT=01
897
898 Temp1=0992  ~/~/ 24.50℃
899
900 Temp2=0A41  ~/~/ 26.25℃
901
902 Temp3=09C4  ~/~/ 25.00℃
903
904
905 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
906
907 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
908 )))
909
910
911 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
912
913
914 (% class="box infomessage" %)
915 (((
916 (((
917 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
918 )))
919
920 (((
921 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
922 )))
923
924 (((
925 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
926 )))
927
928 (((
929 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
930 )))
931
932 (((
933 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
934 )))
935 )))
936
937 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
938
939 Total bytes: 8 bytes
940
941 **Example:**AA0100010001003C
942
943 WMOD=01
944
945 CITEMP=0001
946
947 TEMPlow=0001
948
949 TEMPhigh=003C
950
951
952 == 2.8 LED Indicator ==
953
954
955 The LHT65 has a triple color LED which for easy showing different stage .
956
957 While user press ACT button, the LED will work as per LED status with ACT button.
958
959 In a normal working state:
960
961 * For each uplink, the BLUE LED or RED LED will blink once.
962 BLUE LED when external sensor is connected.
963 * RED LED when external sensor is not connected
964 * For each success downlink, the PURPLE LED will blink once
965
966
967 == 2.9 installation ==
968
969
970 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
971
972
973 = 3. Sensors and Accessories =
974
975 == 3.1 E2 Extension Cable ==
976
977
978 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
979
980
981 **1m long breakout cable for LHT65N. Features:**
982
983 * (((
984 Use for AT Command， works for both LHT52/LHT65N
985 )))
986 * (((
987 Update firmware for LHT65N, works for both LHT52/LHT65N
988 )))
989 * (((
990 Supports ADC mode to monitor external ADC
991 )))
992 * (((
993 Supports Interrupt mode
994 )))
995 * (((
996 Exposed All pins from the LHT65N Type-C connector.
997
998
999
1000 )))
1001
1002 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1003
1004
1005 == 3.2 E3 Temperature Probe ==
1006
1007
1008 [[image:image-20220515080154-4.png||_mstalt="434681" alt="photo-20220515080154-4.png" height="182" width="161"]] [[image:image-20220515080330-5.png||_mstalt="428792" height="201" width="195"]]
1009
1010
1011 Temperature sensor with 2 meters cable long
1012
1013 * Resolution: 0.0625 °C
1014 * ±0.5°C accuracy from -10°C to +85°C
1015 * ±2°C accuracy from -55°C to +125°C
1016 * Operating Range: -40 ~~ 125 °C
1017 * Working voltage 2.35v ~~ 5v
1018
1019
1020 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1021
1022
1023 (((
1024 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1025 )))
1026
1027 * (((
1028 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1029 )))
1030
1031 * (((
1032 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1033 )))
1034
1035 (((
1036 There are two kinds of commands to configure LHT65N, they are:
1037 )))
1038
1039 * (((
1040 (% style="color:#4f81bd" %)**General Commands**.
1041 )))
1042
1043 (((
1044 These commands are to configure:
1045 )))
1046
1047 1. (((
1048 General system settings like: uplink interval.
1049 )))
1050 1. (((
1051 LoRaWAN protocol & radio-related commands.
1052 )))
1053
1054 (((
1055 They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki: [[End Device Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
1056 )))
1057
1058 * (((
1059 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1060 )))
1061
1062 (((
1063 These commands are only valid for LHT65N, as below:
1064 )))
1065
1066
1067 == 4.1 Set Transmit Interval Time ==
1068
1069
1070 Feature: Change LoRaWAN End Node Transmit Interval.
1071
1072
1073 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1074
1075 [[image:image-20220523150701-2.png||_mstalt="427453"]]
1076
1077
1078 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1079
1080 Format: Command Code (0x01) followed by 3 bytes time value.
1081
1082 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1083
1084 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1085
1086 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1087
1088
1089 == 4.2 Set External Sensor Mode ==
1090
1091
1092 Feature: Change External Sensor Mode.
1093
1094
1095 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1096
1097 [[image:image-20220523150759-3.png||_mstalt="432146"]]
1098
1099
1100 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1101
1102 Total bytes: 2 ~~ 5 bytes
1103
1104 **Example:**
1105
1106 * 0xA201: Set external sensor type to E1
1107
1108 * 0xA209: Same as AT+EXT=9
1109
1110 * 0xA20702003c: Same as AT+SETCNT=60
1111
1112
1113 == 4.3 Enable/Disable uplink Temperature probe ID ==
1114
1115
1116 (((
1117 Feature: If PID is enabled, device will send the temperature probe ID on:
1118 )))
1119
1120 * (((
1121 First Packet after OTAA Join
1122 )))
1123 * (((
1124 Every 24 hours since the first packet.
1125 )))
1126
1127 (((
1128 PID is default set to disable (0)
1129
1130
1131 )))
1132
1133 (% style="color:#4f81bd" %)**AT Command:**
1134
1135 [[image:image-20220523150928-4.png||_mstalt="431821"]]
1136
1137
1138 (% style="color:#4f81bd" %)**Downlink Command:**
1139
1140 * **0xA800**  **~-~->** AT+PID=0
1141 * **0xA801**     **~-~->** AT+PID=1
1142
1143
1144 == 4.4 Set Password ==
1145
1146
1147 Feature: Set device password, max 9 digits
1148
1149
1150 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1151
1152 [[image:image-20220523151052-5.png||_mstalt="428623"]]
1153
1154
1155 (% style="color:#4f81bd" %)**Downlink Command:**
1156
1157 No downlink command for this feature.
1158
1159
1160 == 4.5 Quit AT Command ==
1161
1162
1163 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1164
1165
1166 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1167
1168 [[image:image-20220523151132-6.png||_mstalt="428649"]]
1169
1170
1171 (% style="color:#4f81bd" %)**Downlink Command:**
1172
1173 No downlink command for this feature.
1174
1175
1176 == 4.6 Set to sleep mode ==
1177
1178
1179 Feature: Set device to sleep mode
1180
1181 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1182 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1183
1184 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1185
1186 [[image:image-20220523151218-7.png||_mstalt="430703"]]
1187
1188
1189 (% style="color:#4f81bd" %)**Downlink Command:**
1190
1191 * There is no downlink command to set to Sleep mode.
1192
1193
1194 == 4.7 Set system time ==
1195
1196
1197 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1198
1199
1200 (% style="color:#4f81bd" %)**AT Command:**
1201
1202 [[image:image-20220523151253-8.png||_mstalt="430677"]]
1203
1204
1205 (% style="color:#4f81bd" %)**Downlink Command:**
1206
1207 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1208
1209
1210 == 4.8 Set Time Sync Mode ==
1211
1212
1213 (((
1214 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1215 )))
1216
1217 (((
1218 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.
1219
1220
1221 )))
1222
1223 (% style="color:#4f81bd" %)**AT Command:**
1224
1225 [[image:image-20220523151336-9.png||_mstalt="431717"]]
1226
1227
1228 (% style="color:#4f81bd" %)**Downlink Command:**
1229
1230 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1231 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1232
1233
1234 == 4.9 Set Time Sync Interval ==
1235
1236
1237 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1238
1239
1240 (% style="color:#4f81bd" %)**AT Command:**
1241
1242 [[image:image-20220523151411-10.png||_mstalt="449696"]]
1243
1244
1245 (% style="color:#4f81bd" %)**Downlink Command:**
1246
1247 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1248
1249
1250 == 4.10 Print data entries base on page. ==
1251
1252
1253 Feature: Print the sector data from start page to stop page (max is 416 pages).
1254
1255
1256 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1257
1258 [[image:image-20220523151450-11.png||_mstalt="451035"]]
1259
1260
1261 (% style="color:#4f81bd" %)**Downlink Command:**
1262
1263 No downlink commands for feature
1264
1265
1266 == 4.11 Print last few data entries. ==
1267
1268
1269 Feature: Print the last few data entries
1270
1271
1272 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1273
1274 [[image:image-20220523151524-12.png||_mstalt="452101"]]
1275
1276
1277 (% style="color:#4f81bd" %)**Downlink Command:**
1278
1279 No downlink commands for feature
1280
1281
1282 == 4.12 Clear Flash Record ==
1283
1284
1285 Feature: Clear flash storage for data log feature.
1286
1287
1288 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1289
1290 [[image:image-20220523151556-13.png||_mstalt="454129"]]
1291
1292
1293 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1294
1295 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1296
1297
1298 == 4.13 Auto Send None-ACK messages ==
1299
1300
1301 Feature: LHT65N will wait for ACK for each uplink, If LHT65N doesn't get ACK from the IoT server, it will consider the message doesn't arrive server and store it. LHT65N keeps sending messages in normal periodically. Once LHT65N gets ACK from a server, it will consider the network is ok and start to send the not-arrive message.
1302
1303
1304 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1305
1306 The default factory setting is 0
1307
1308 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1309 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1310 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1311
1312 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1313
1314 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1315
1316
1317 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1318
1319
1320 Feature: Set internal and external temperature sensor alarms.
1321
1322 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1323 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1324 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1325
1326 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1327
1328 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1329
1330 0): Cancel
1331
1332 1): Threshold alarm
1333
1334 2): Fluctuation alarm
1335
1336
1337 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1338
1339 (% style="color:red" %)**Note: When the collection time is less than 60 seconds and always exceeds the set alarm threshold, the sending interval will not be the collection time, but will be sent every 60 seconds.**
1340
1341
1342 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1343
1344 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1345
1346 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1347
1348
1349 2):  If Alarm Mode is set to 2: Parameter 3 is valid, which represents the difference between the currently collected temperature and the last uploaded temperature.
1350
1351 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1352
1353 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1354
1355
1356 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1357
1358 0xA5 00 ~-~- AT+WMOD=0.
1359
1360 0xA5 01 0A 11 94 29 04 ~-~- AT+WMOD=1,10,45,105  (AT+WMOD = second byte, third byte, fourth and fifth bytes divided by 100, sixth and seventh bytes divided by 100 )
1361
1362 0XA5 01 0A F9 C0 29 04 ~-~-AT+WMOD=1,10,-16,105(Need to convert -16 to -1600 for calculation，-1600(DEC)=FFFFFFFFFFFFF9C0(HEX)  FFFFFFFFFFFFF9C0(HEX) +10000(HEX)=F9C0(HEX))
1363
1364 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1365
1366 0xA5 FF ~-~- After the device receives it, upload the current alarm configuration (FPORT=8). Such as 01 0A 11 94 29 04 or 02 0A 02.
1367
1368
1369 = 5. Battery & How to replace =
1370
1371 == 5.1 Battery Type ==
1372
1373
1374 (((
1375 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.
1376 )))
1377
1378 (((
1379 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1380
1381
1382 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1383 )))
1384
1385 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1386
1387
1388 == 5.2 Replace Battery ==
1389
1390
1391 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.
1392
1393 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1394
1395
1396 == 5.3 Battery Life Analyze ==
1397
1398
1399 (((
1400 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:
1401 [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf>>https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf]]
1402 )))
1403
1404
1405 (((
1406 A full detail test report for LHT65N on different frequency can be found at : [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0>>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
1407 )))
1408
1409
1410 = 6. FAQ =
1411
1412 == 6.1 How to use AT Command? ==
1413
1414
1415 LHT65N supports AT Command set.User can use a USB to TTL adapter plus the Program Cable to connect to LHT65 for using AT command, as below.
1416
1417 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1418
1419
1420 **Connection:**
1421
1422 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1423 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1424 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1425
1426 (((
1427 In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**) (%%)to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1428 )))
1429
1430
1431 Input password and ATZ to activate LHT65N,As shown below:
1432
1433 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1434
1435
1436 AT Command List is as below:
1437
1438 AT+<CMD>? :  Help on <CMD>
1439
1440 AT+<CMD> :  Run <CMD>
1441
1442 AT+<CMD>=<value> :  Set the value
1443
1444 AT+<CMD>=? :  Get the value
1445
1446 AT+DEBUG:  Set more info output
1447
1448 ATZ:  Trig a reset of the MCU
1449
1450 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1451
1452 AT+DEUI:  Get or Set the Device EUI
1453
1454 AT+DADDR:  Get or Set the Device Address
1455
1456 AT+APPKEY:  Get or Set the Application Key
1457
1458 AT+NWKSKEY:  Get or Set the Network Session Key
1459
1460 AT+APPSKEY:  Get or Set the Application Session Key
1461
1462 AT+APPEUI:  Get or Set the Application EUI
1463
1464 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1465
1466 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1467
1468 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1469
1470 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1471
1472 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1473
1474 AT+RX2FQ:  Get or Set the Rx2 window frequency
1475
1476 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1477
1478 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1479
1480 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1481
1482 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1483
1484 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1485
1486 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1487
1488 AT+NWKID:  Get or Set the Network ID
1489
1490 AT+FCU:  Get or Set the Frame Counter Uplink
1491
1492 AT+FCD:  Get or Set the Frame Counter Downlink
1493
1494 AT+CLASS:  Get or Set the Device Class
1495
1496 AT+JOIN:  Join network
1497
1498 AT+NJS:  Get the join status
1499
1500 AT+SENDB:  Send hexadecimal data along with the application port
1501
1502 AT+SEND:  Send text data along with the application port
1503
1504 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1505
1506 AT+RECV:  Print last received data in raw format
1507
1508 AT+VER:  Get current image version and Frequency Band
1509
1510 AT+CFM:  Get or Set the confirmation mode (0-1)
1511
1512 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1513
1514 AT+SNR:  Get the SNR of the last received packet
1515
1516 AT+RSSI:  Get the RSSI of the last received packet
1517
1518 AT+TDC:  Get or set the application data transmission interval in ms
1519
1520 AT+PORT:  Get or set the application port
1521
1522 AT+DISAT:  Disable AT commands
1523
1524 AT+PWORD: Set password, max 9 digits
1525
1526 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1527
1528 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1529
1530 AT+PDTA:  Print the sector data from start page to stop page
1531
1532 AT+PLDTA:  Print the last few sets of data
1533
1534 AT+CLRDTA:  Clear the storage, record position back to 1st
1535
1536 AT+SLEEP:  Set sleep mode
1537
1538 AT+EXT:  Get or Set external sensor model
1539
1540 AT+BAT:  Get the current battery voltage in mV
1541
1542 AT+CFG:  Print all configurations
1543
1544 AT+WMOD:  Get or Set Work Mode
1545
1546 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1547
1548 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1549
1550 AT+SETCNT:  Set the count at present
1551
1552 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1553
1554 AT+RPL:  Get or set response level
1555
1556 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1557
1558 AT+LEAPSEC:  Get or Set Leap Second
1559
1560 AT+SYNCMOD:  Get or Set time synchronization method
1561
1562 AT+SYNCTDC:  Get or set time synchronization interval in day
1563
1564 AT+PID:  Get or set the PID
1565
1566
1567 == 6.2 Where to use AT commands and Downlink commands ==
1568
1569
1570 **AT commands：**
1571
1572 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1573
1574
1575 **Downlink commands:**
1576
1577
1578
1579 (% style="color:blue" %)**TTN:**
1580
1581 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1582
1583
1584
1585 (% style="color:blue" %)**Helium：**
1586
1587 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1588
1589
1590
1591 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1592
1593
1594 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1595
1596
1597 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1598
1599
1600
1601 (% style="color:blue" %)**Aws:**
1602
1603 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1604
1605
1606 == 6.3 How to change the uplink interval？ ==
1607
1608
1609 Please see this link: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1610
1611
1612 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1613
1614
1615 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1616
1617 [[image:1655802313617-381.png||_mstalt="293917"]]
1618
1619
1620 (((
1621 In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600** (%%)to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**(% style="color:red" %))(%%) to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1622 )))
1623
1624
1625 Input password and ATZ to activate LHT65N,As shown below:
1626
1627 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1628
1629
1630 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1631
1632
1633 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1634
1635
1636 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1637
1638 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1639
1640
1641
1642 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1643
1644 First connect the four lines；(% style="display:none" %)
1645
1646 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1647
1648
1649 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1650
1651 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1652
1653
1654
1655 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1656
1657 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1658
1659
1660 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1661
1662
1663 When this interface appears, it indicates that the download has been completed.
1664
1665 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1666
1667
1668 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1669
1670
1671 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1672
1673
1674 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1675
1676
1677 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1678
1679
1680 (((
1681 In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600** (%%)to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**(% style="color:red" %))(%%) to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1682 )))
1683
1684
1685 Input password and ATZ to activate LHT65N,As shown below:
1686
1687 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1688
1689
1690 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1691
1692
1693 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1694
1695
1696 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1697
1698 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1699
1700
1701
1702 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1703
1704 First connect the four lines；
1705
1706 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1707
1708 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1709
1710
1711
1712 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1713
1714 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1715
1716
1717 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1718
1719
1720 When this interface appears, it indicates that the download has been completed.
1721
1722 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1723
1724
1725 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1726
1727
1728 = 7. Order Info =
1729
1730
1731 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1732
1733 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1734
1735 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1736 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1737 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1738 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1739 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1740 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1741 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1742 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1743
1744 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1745
1746 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1747
1748
1749 = 8. Packing Info =
1750
1751
1752 **Package Includes**:
1753
1754 * LHT65N Temperature & Humidity Sensor x 1
1755 * Optional external sensor
1756
1757 **Dimension and weight**:
1758
1759 * Device Size:  10 x 10 x 3.5 mm
1760 * Device Weight: 120.5g
1761
1762
1763 = 9. Reference material =
1764
1765
1766 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1767
1768
1769 = 10. FCC Warning =
1770
1771
1772 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1773
1774 (1) This device may not cause harmful interference；
1775
1776 (2) this device must accept any interference received, including interference that may cause undesired operation.
1777
1778
1779