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Version 230.1 by Bei Jinggeng on 2023/03/13 09:40
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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 * LoRaWAN v1.0.3 Class A protocol
50 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
51 * AT Commands to change parameters
52 * Remote configure parameters via LoRaWAN Downlink
53 * Firmware upgradeable via program port
54 * Built-in 2400mAh battery for up to 10 years of use.
55 * Built-in Temperature & Humidity sensor
56 * Optional External Sensors
57 * Tri-color LED to indicate working status
58 * Datalog feature (Max 3328 records)
59
60
61 == 1.3 Specification ==
62
63
64 (% style="color:#037691" %)**Built-in Temperature Sensor:**
65
66 * Resolution: 0.01 °C
67 * Accuracy Tolerance : Typ ±0.3 °C
68 * Long Term Drift: < 0.02 °C/yr
69 * Operating Range: -40 ~~ 85 °C
70
71 (% style="color:#037691" %)**Built-in Humidity Sensor:**
72
73 * Resolution: 0.04 %RH
74 * Accuracy Tolerance : Typ ±3 %RH
75 * Long Term Drift: < 0.02 °C/yr
76 * Operating Range: 0 ~~ 96 %RH
77
78 (% style="color:#037691" %)**External Temperature Sensor:**
79
80 * Resolution: 0.0625 °C
81 * ±0.5°C accuracy from -10°C to +85°C
82 * ±2°C accuracy from -55°C to +125°C
83 * Operating Range: -55 °C ~~ 125 °C
84
85
86 = 2. Connect LHT65N to IoT Server =
87
88 == 2.1 How does LHT65N work? ==
89
90
91 (((
92 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.
93 )))
94
95 (((
96 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.
97 )))
98
99
100 == 2.2 How to Activate LHT65N? ==
101
102
103 (((
104 The LHT65N has two working modes:
105 )))
106
107 * (((
108 (% 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.
109 )))
110 * (((
111 (% 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. 
112 )))
113
114 (((
115 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
116 )))
117
118
119 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
120
121 [[image:image-20220525110604-2.png||_mstalt="427531"]]
122
123
124 == 2.3 Example to join LoRaWAN network ==
125
126
127 (% class="wikigeneratedid" %)
128 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.
129
130
131 (% class="wikigeneratedid" %)
132 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
133
134
135 (((
136 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:
137 )))
138
139
140 === 2.3.1 Step 1: Create Device n TTN ===
141
142
143 (((
144 Create a device in TTN V3 with the OTAA keys from LHT65N.
145 )))
146
147 (((
148 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
149 )))
150
151 [[image:image-20220617150003-1.jpeg||_mstalt="5426434"]]
152
153 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
154
155 Add APP EUI in the application.
156
157
158 [[image:image-20220522232916-3.png||_mstalt="430495"]]
159
160
161 [[image:image-20220522232932-4.png||_mstalt="430157"]]
162
163
164 [[image:image-20220522232954-5.png||_mstalt="431847"]]
165
166
167
168 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
169
170
171 [[image:image-20220522233026-6.png||_mstalt="429403"]]
172
173
174 Input APP EUI,  APP KEY and DEV EUI:
175
176
177 [[image:image-20220522233118-7.png||_mstalt="430430"]]
178
179
180 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
181
182
183 (((
184 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.
185 )))
186
187 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
188
189
190 == 2.4 Uplink Payload   ( Fport~=2) ==
191
192
193 (((
194 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
195 )))
196
197 (((
198 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
199 )))
200
201 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
202 |=(% style="width: 60px;" %)(((
203 **Size(bytes)**
204 )))|=(% style="width: 30px;" %)(((
205 **2**
206 )))|=(% style="width: 100px;" %)(((
207 **2**
208 )))|=(% style="width: 100px;" %)(((
209 **2**
210 )))|=(% style="width: 50px;" %)(((
211 **1**
212 )))|=(% style="width: 50px;" %)(((
213 **4**
214 )))
215 |(% style="width:97px" %)(((
216 **Value**
217 )))|(% style="width:39px" %)(((
218 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
219 )))|(% style="width:100px" %)(((
220 (((
221 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
222 )))
223 )))|(% style="width:77px" %)(((
224 (((
225 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
226 )))
227 )))|(% style="width:47px" %)(((
228 [[Ext>>||anchor="H2.4.5Ext23"]] #
229 )))|(% style="width:51px" %)(((
230 [[Ext value>>||anchor="H2.4.6Extvalue"]]
231 )))
232
233 * The First 6 bytes: has fix meanings for every LHT65N.
234 * The 7th byte (EXT #): defines the external sensor model.
235 * 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.)
236
237
238 === 2.4.1 Decoder in TTN V3 ===
239
240
241 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.
242
243 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]]
244
245
246 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
247
248
249 === 2.4.2 BAT-Battery Info ===
250
251
252 These two bytes of BAT include the battery state and the actually voltage
253
254 [[image:image-20220523152839-18.png||_mstalt="457613"]]
255
256
257 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
258
259
260 Check the battery voltage for LHT65N.
261
262 * BAT status=(0Xcba4>>14)&0xFF=11(DEC)  /  B(HEX) ，very good
263 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
264
265
266 === 2.4.3 Built-in Temperature ===
267
268
269 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
270
271 * Temperature:  0x0ABB/100=27.47℃
272
273 [[image:image-20220522235639-3.png||_mstalt="432120"]]
274
275 * Temperature:  (0xF5C6-65536)/100=-26.18℃
276
277
278 === 2.4.4 Built-in Humidity ===
279
280
281 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
282
283 * Humidity:    0x025C/10=60.4%
284
285
286 === 2.4.5 Ext # ===
287
288
289 Bytes for External Sensor:
290
291 [[image:image-20220523152822-17.png||_mstalt="454545"]]
292
293
294 === 2.4.6 Ext value ===
295
296 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
297
298
299 [[image:image-20220522235639-5.png||_mstalt="432848"]]
300
301
302 * DS18B20 temp=0x0ADD/100=27.81℃
303
304 The last 2 bytes of data are meaningless
305
306
307
308 [[image:image-20220522235639-6.png||_mstalt="433212"]]
309
310
311 * External temperature= (0xF54F-65536)/100=-27.37℃
312
313 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
314
315 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
316
317 The last 2 bytes of data are meaningless
318
319 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
320
321
322
323 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
324
325
326 (((
327 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:
328 )))
329
330 (((
331
332 )))
333
334 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
335 |=(% style="width: 50px;" %)(((
336 **Size(bytes)**
337 )))|=(% style="width: 70px;" %)(((
338 **2**
339 )))|=(% style="width: 120px;" %)(((
340 **2**
341 )))|=(% style="width: 120px;" %)(((
342 **2**
343 )))|=(% style="width: 50px;" %)(((
344 **1**
345 )))|=(% style="width: 70px;" %)(((
346 **4**
347 )))
348 |(% style="width:110px" %)(((
349 **Value**
350 )))|(% style="width:71px" %)(((
351 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
352 )))|(% style="width:99px" %)(((
353 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
354 )))|(% style="width:132px" %)(((
355 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
356 )))|(% style="width:54px" %)(((
357 Status & Ext
358 )))|(% style="width:64px" %)(((
359 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
360 )))
361
362 * **Battery status & Built-in Humidity**
363
364 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
365 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
366 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
367 BAT Status
368 00(b): Ultra Low ( BAT <= 2.50v)
369 01(b): Low  (2.50v <=BAT <= 2.55v)
370 10(b): OK   (2.55v <= BAT <=2.65v)
371 11(b): Good   (BAT >= 2.65v)
372 )))|(% style="width:132px" %)(((
373 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
374 )))
375
376 * **Status & Ext Byte**
377
378 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
379 |=(% 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]**
380 |=(% 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)
381
382 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
383 * (% 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.
384 * (% 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)
385
386
387 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
388
389
390 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
391
392 be used to power the external ADC sensor; user can control the power on time for this
393
394 (% style="color:blue" %)**sensor by setting:**
395
396 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
397
398 **For example:**
399
400 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
401
402
403 Or use **downlink command A2** to set the same.
404
405 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
406
407 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.
408
409 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
410
411
412 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
413
414 [[image:image-20220628150714-4.png||_mstalt="431054"]]
415
416
417 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.
418
419
420 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
421
422 [[image:image-20220628151005-5.png||_mstalt="429546"]]
423
424
425 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
426
427 [[image:image-20220628151056-6.png||_mstalt="431873"]]
428
429
430 3) Within range
431
432 [[image:image-20220628151143-7.png||_mstalt="431210"]]
433
434
435
436 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
437
438
439 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
440
441
442 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
443
444 [[image:image-20220906102307-7.png||_mstalt="430443"]]
445
446
447 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
448
449 The external cable NE2 can be use for MOD4 and MOD8
450
451
452
453 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
454
455
456 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
457
458
459 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
460
461 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
462
463 In Open State, the power consumption is the same as if there is no probe
464
465 In Close state, the power consumption will be 3uA higher than normal.
466
467 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
468
469
470 Ext=4,Interrupt Sensor：
471
472 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
473 |(% style="width:101px" %)(((
474 AT+EXT=4,1
475 )))|(% style="width:373px" %)(((
476 Sent uplink packet in both rising and falling interrupt
477 )))
478 |(% style="width:101px" %)(((
479 AT+EXT=4,2
480 )))|(% style="width:373px" %)(((
481 Sent uplink packet only in falling interrupt
482 )))
483 |(% style="width:101px" %)(((
484 AT+EXT=4,3
485 )))|(% style="width:373px" %)(((
486 Sent uplink packet only in rising interrupt
487 )))
488
489 Trigger by falling edge:
490
491 [[image:image-20220906101145-2.png||_mstalt="428324"]]
492
493
494 Trigger by raising edge：
495
496 [[image:image-20220906101145-3.png||_mstalt="428688"]]
497
498
499
500 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
501
502
503 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
504
505
506 (% 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.
507
508 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
509
510
511 (% 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
512
513 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
514
515
516 Ext=8, Counting Sensor ( 4 bytes)：
517
518 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
519 |(% style="width:138px" %)(((
520 AT+EXT=8,0
521 )))|(% style="width:240px" %)(((
522 Count at falling interrupt
523 )))
524 |(% style="width:138px" %)(((
525 AT+EXT=8,1
526 )))|(% style="width:240px" %)(((
527 Count at rising interrupt
528 )))
529 |(% style="width:138px" %)(((
530 AT+SETCNT=60
531 )))|(% style="width:240px" %)(((
532 Sent current count to 60
533 )))
534
535 [[image:image-20220906101320-6.png||_mstalt="428064"]]
536
537
538 (% style="color:blue" %)**A2 downlink Command：**
539
540 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
541
542 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
543
544 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
545
546 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
547
548 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)
549
550
551 == 2.5 Show data on Datacake ==
552
553
554 (((
555 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:
556 )))
557
558 (((
559
560 )))
561
562 (((
563 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
564 )))
565
566 (((
567 (% 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.
568 )))
569
570 (((
571
572 )))
573
574 (((
575 Add Datacake:
576 )))
577
578
579 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
580
581
582
583 Select default key as Access Key:
584
585
586 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
587
588
589 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
590
591
592 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
593
594
595 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
596
597
598 == 2.6 Datalog Feature ==
599
600
601 (((
602 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.
603 )))
604
605
606 === 2.6.1 Ways to get datalog via LoRaWAN ===
607
608
609 There are two methods:
610
611 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
612
613
614 (% 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.
615
616
617 (% style="color:red" %)**Note for method 2:**
618
619 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
620 * 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.
621
622 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
623
624
625 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
626
627
628 === 2.6.2 Unix TimeStamp ===
629
630
631 LHT65N uses Unix TimeStamp format based on
632
633
634 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
635
636
637
638 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
639
640 Below is the converter example
641
642 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
643
644
645 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
646
647
648 === 2.6.3 Set Device Time ===
649
650
651 (((
652 (% style="color:blue" %)**There are two ways to set device's time:**
653 )))
654
655 (((
656 **1.  Through LoRaWAN MAC Command (Default settings)**
657 )))
658
659 (((
660 User need to set SYNCMOD=1 to enable sync time via MAC command.
661 )))
662
663 (((
664 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).
665 )))
666
667 (((
668 (% 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.**
669 )))
670
671
672 (((
673 **2. Manually Set Time**
674 )))
675
676 (((
677 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
678 )))
679
680
681 === 2.6.4 Poll sensor value ===
682
683
684 User can poll sensor value based on timestamps from the server. Below is the downlink command.
685
686 [[image:image-20220523152302-15.png||_mstalt="451581"]]
687
688
689 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.
690
691 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
692
693 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
694
695 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
696
697
698 === 2.6.5 Datalog Uplink payload ===
699
700
701 The Datalog poll reply uplink will use below payload format.
702
703 **Retrieval data payload:**
704
705 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
706 |=(% style="width: 60px;" %)(((
707 **Size(bytes)**
708 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
709 |(% 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"]]
710
711 **Poll message flag & Ext:**
712
713 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
714
715 (% 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)
716
717 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
718
719 * Poll Message Flag is set to 1.
720
721 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
722
723 For example, in US915 band, the max payload for different DR is:
724
725 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
726
727 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
728
729 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
730
731 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
732
733 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
734
735
736 **Example:**
737
738 If LHT65N has below data inside Flash:
739
740 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
741
742
743 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
744
745 Where : Start time: 60065F97 = time 21/1/19 04:27:03
746
747 Stop time: 60066DA7= time 21/1/19 05:27:03
748
749
750 **LHT65N will uplink this payload.**
751
752 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
753
754
755 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
756
757 Where the first 11 bytes is for the first entry:
758
759 7FFF089801464160065F97
760
761 Ext sensor data=0x7FFF/100=327.67
762
763 Temp=0x088E/100=22.00
764
765 Hum=0x014B/10=32.6
766
767 poll message flag & Ext=0x41,means reply data,Ext=1
768
769 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
770
771
772 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
773
774
775 (((
776 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.
777 )))
778
779 (((
780 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
781
782
783 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
784
785
786 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
787
788 (((
789 (% class="box infomessage" %)
790 (((
791 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
792
793 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
794
795 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
796
797 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
798
799 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
800
801 **AT+LEDALARM=1** :       Enable LED visual Alarm.
802 )))
803 )))
804
805 (% style="color:#4f81bd" %)**Downlink Command:**
806
807 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
808
809 AT+CITEMP=1 : A60001
810
811 AT+ARTEMP=1,60  :  A70001003C
812
813 AT+ARTEMP=-16,60 :  A7FFF0003C
814
815 AT+LEDALARM=1  :  3601
816
817
818 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
819
820 Total bytes: 8 bytes
821
822 **Example: **AA0100010001003C
823
824 WMOD=01
825
826 CITEMP=0001
827
828 TEMPlow=0001
829
830 TEMPhigh=003C
831
832
833 **DS18B20 and TMP117 Threshold Alarm**
834
835 **~ AT+WMOD=1,60,-10,20**
836
837 (% style="color:#4f81bd" %)**Downlink Command:**
838
839 **Example: **A5013CFC180014
840
841 MOD=01
842
843 CITEMP=3C(S)
844
845 TEMPlow=FC18
846
847 TEMPhigh=0014
848
849
850 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
851
852 **AT+WMOD=2,60,5** 
853
854 (% style="color:#4f81bd" %)**Downlink Command:**
855
856 **Example: **A5023C05
857
858 MOD=02
859
860 CITEMP=3C(S)
861
862 temperature fluctuation=05
863
864
865 **Sampling multiple times and uplink together**
866
867 **AT+WMOD=3,1,60,20,-16,32,1**   
868
869 Explain:
870
871 * (% style="color:#037691" %)**parameter1:**(%%)Set Working Mode to **Mode 3**
872 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
873 * (% style="color:#037691" %)**parameter3:**(%%)Sampling Interval is **60**s.
874 * (% style="color:#037691" %)**parameter4:**(%%)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)
875 * (% style="color:#037691" %)**parameter5 & parameter6:**(%%)Temperature alarm range is **-16** to **32**°C,
876 * (% style="color:#037691" %)**parameter7:**(%%) 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.
877
878 (% style="color:#4f81bd" %)**Downlink Command:**
879
880 **Example: **A50301003C14FFF0002001
881
882 MOD=03
883
884 TEMP=DS18B20
885
886 CITEMP=003C(S)
887
888 Total number of acquisitions=14
889
890 TEMPlow=FFF0
891
892 TEMPhigh=0020
893
894 ARTEMP=01
895
896 **Uplink payload( Fport=3)**
897
898 **Example: CBEA**01**0992**//0A41//**09C4**
899
900 BatV=CBEA
901
902 TEMP=DS18B20
903
904 Temp1=0992  ~/~/ 24.50℃
905
906 Temp2=0A41  ~/~/ 26.25℃
907
908 Temp3=09C4  ~/~/ 25.00℃
909
910 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
911
912 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
913 )))
914
915
916 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
917
918
919 (% class="box infomessage" %)
920 (((
921 (((
922 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
923 )))
924
925 (((
926 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
927 )))
928
929 (((
930 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
931 )))
932
933 (((
934 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
935 )))
936
937 (((
938 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
939 )))
940 )))
941
942 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
943
944 Total bytes: 8 bytes
945
946 **Example:**AA0100010001003C
947
948 WMOD=01
949
950 CITEMP=0001
951
952 TEMPlow=0001
953
954 TEMPhigh=003C
955
956
957 == 2.8 LED Indicator ==
958
959
960 The LHT65 has a triple color LED which for easy showing different stage .
961
962 While user press ACT button, the LED will work as per LED status with ACT button.
963
964 In a normal working state:
965
966 * For each uplink, the BLUE LED or RED LED will blink once.
967 BLUE LED when external sensor is connected.
968 * RED LED when external sensor is not connected
969 * For each success downlink, the PURPLE LED will blink once
970
971
972 == 2.9 installation ==
973
974
975 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
976
977
978 = 3. Sensors and Accessories =
979
980 == 3.1 E2 Extension Cable ==
981
982
983 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
984
985
986 **1m long breakout cable for LHT65N. Features:**
987
988 * (((
989 Use for AT Command， works for both LHT52/LHT65N
990 )))
991 * (((
992 Update firmware for LHT65N, works for both LHT52/LHT65N
993 )))
994 * (((
995 Supports ADC mode to monitor external ADC
996 )))
997 * (((
998 Supports Interrupt mode
999 )))
1000 * (((
1001 Exposed All pins from the LHT65N Type-C connector.
1002
1003
1004
1005 )))
1006
1007 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1008
1009
1010 == 3.2 E3 Temperature Probe ==
1011
1012
1013 [[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"]]
1014
1015
1016 Temperature sensor with 2 meters cable long
1017
1018 * Resolution: 0.0625 °C
1019 * ±0.5°C accuracy from -10°C to +85°C
1020 * ±2°C accuracy from -55°C to +125°C
1021 * Operating Range: -40 ~~ 125 °C
1022 * Working voltage 2.35v ~~ 5v
1023
1024
1025 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1026
1027
1028 (((
1029 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1030 )))
1031
1032 * (((
1033 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1034 )))
1035
1036 * (((
1037 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1038 )))
1039
1040 (((
1041 There are two kinds of commands to configure LHT65N, they are:
1042 )))
1043
1044 * (((
1045 (% style="color:#4f81bd" %)**General Commands**.
1046 )))
1047
1048 (((
1049 These commands are to configure:
1050 )))
1051
1052 1. (((
1053 General system settings like: uplink interval.
1054 )))
1055 1. (((
1056 LoRaWAN protocol & radio-related commands.
1057 )))
1058
1059 (((
1060 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]]
1061 )))
1062
1063 * (((
1064 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1065 )))
1066
1067 (((
1068 These commands are only valid for LHT65N, as below:
1069 )))
1070
1071
1072 == 4.1 Set Transmit Interval Time ==
1073
1074
1075 Feature: Change LoRaWAN End Node Transmit Interval.
1076
1077
1078 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1079
1080 [[image:image-20220523150701-2.png||_mstalt="427453"]]
1081
1082
1083 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1084
1085 Format: Command Code (0x01) followed by 3 bytes time value.
1086
1087 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1088
1089 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1090
1091 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1092
1093
1094 == 4.2 Set External Sensor Mode ==
1095
1096
1097 Feature: Change External Sensor Mode.
1098
1099
1100 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1101
1102 [[image:image-20220523150759-3.png||_mstalt="432146"]]
1103
1104
1105 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1106
1107 Total bytes: 2 ~~ 5 bytes
1108
1109 **Example:**
1110
1111 * 0xA201: Set external sensor type to E1
1112
1113 * 0xA209: Same as AT+EXT=9
1114
1115 * 0xA20702003c: Same as AT+SETCNT=60
1116
1117
1118 == 4.3 Enable/Disable uplink Temperature probe ID ==
1119
1120
1121 (((
1122 Feature: If PID is enabled, device will send the temperature probe ID on:
1123 )))
1124
1125 * (((
1126 First Packet after OTAA Join
1127 )))
1128 * (((
1129 Every 24 hours since the first packet.
1130 )))
1131
1132 (((
1133 PID is default set to disable (0)
1134
1135
1136 )))
1137
1138 (% style="color:#4f81bd" %)**AT Command:**
1139
1140 [[image:image-20220523150928-4.png||_mstalt="431821"]]
1141
1142
1143 (% style="color:#4f81bd" %)**Downlink Command:**
1144
1145 * **0xA800**  **~-~->** AT+PID=0
1146 * **0xA801**     **~-~->** AT+PID=1
1147
1148
1149 == 4.4 Set Password ==
1150
1151
1152 Feature: Set device password, max 9 digits
1153
1154
1155 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1156
1157 [[image:image-20220523151052-5.png||_mstalt="428623"]]
1158
1159
1160 (% style="color:#4f81bd" %)**Downlink Command:**
1161
1162 No downlink command for this feature.
1163
1164
1165 == 4.5 Quit AT Command ==
1166
1167
1168 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1169
1170
1171 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1172
1173 [[image:image-20220523151132-6.png||_mstalt="428649"]]
1174
1175
1176 (% style="color:#4f81bd" %)**Downlink Command:**
1177
1178 No downlink command for this feature.
1179
1180
1181 == 4.6 Set to sleep mode ==
1182
1183
1184 Feature: Set device to sleep mode
1185
1186 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1187 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1188
1189 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1190
1191 [[image:image-20220523151218-7.png||_mstalt="430703"]]
1192
1193
1194 (% style="color:#4f81bd" %)**Downlink Command:**
1195
1196 * There is no downlink command to set to Sleep mode.
1197
1198
1199 == 4.7 Set system time ==
1200
1201
1202 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1203
1204
1205 (% style="color:#4f81bd" %)**AT Command:**
1206
1207 [[image:image-20220523151253-8.png||_mstalt="430677"]]
1208
1209
1210 (% style="color:#4f81bd" %)**Downlink Command:**
1211
1212 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1213
1214
1215 == 4.8 Set Time Sync Mode ==
1216
1217
1218 (((
1219 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1220 )))
1221
1222 (((
1223 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.
1224
1225
1226 )))
1227
1228 (% style="color:#4f81bd" %)**AT Command:**
1229
1230 [[image:image-20220523151336-9.png||_mstalt="431717"]]
1231
1232
1233 (% style="color:#4f81bd" %)**Downlink Command:**
1234
1235 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1236 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1237
1238
1239 == 4.9 Set Time Sync Interval ==
1240
1241
1242 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1243
1244
1245 (% style="color:#4f81bd" %)**AT Command:**
1246
1247 [[image:image-20220523151411-10.png||_mstalt="449696"]]
1248
1249
1250 (% style="color:#4f81bd" %)**Downlink Command:**
1251
1252 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1253
1254
1255 == 4.10 Print data entries base on page. ==
1256
1257
1258 Feature: Print the sector data from start page to stop page (max is 416 pages).
1259
1260
1261 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1262
1263 [[image:image-20220523151450-11.png||_mstalt="451035"]]
1264
1265
1266 (% style="color:#4f81bd" %)**Downlink Command:**
1267
1268 No downlink commands for feature
1269
1270
1271 == 4.11 Print last few data entries. ==
1272
1273
1274 Feature: Print the last few data entries
1275
1276
1277 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1278
1279 [[image:image-20220523151524-12.png||_mstalt="452101"]]
1280
1281
1282 (% style="color:#4f81bd" %)**Downlink Command:**
1283
1284 No downlink commands for feature
1285
1286
1287 == 4.12 Clear Flash Record ==
1288
1289
1290 Feature: Clear flash storage for data log feature.
1291
1292
1293 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1294
1295 [[image:image-20220523151556-13.png||_mstalt="454129"]]
1296
1297
1298 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1299
1300 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1301
1302
1303 == 4.13 Auto Send None-ACK messages ==
1304
1305
1306 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.
1307
1308
1309 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1310
1311 The default factory setting is 0
1312
1313 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1314 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1315 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1316
1317 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1318
1319 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1320
1321
1322 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1323
1324
1325 Feature: Set internal and external temperature sensor alarms.
1326
1327 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1328 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1329 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1330
1331 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1332
1333 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1334
1335 0): Cancel
1336
1337 1): Threshold alarm
1338
1339 2): Fluctuation alarm
1340
1341
1342 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1343
1344 (% 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.**
1345
1346
1347 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1348
1349 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1350
1351 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1352
1353
1354 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.
1355
1356 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1357
1358 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1359
1360
1361 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1362
1363 0xA5 00 ~-~- AT+WMOD=0.
1364
1365 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 )
1366
1367 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))
1368
1369 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1370
1371 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.
1372
1373
1374 = 5. Battery & How to replace =
1375
1376 == 5.1 Battery Type ==
1377
1378
1379 (((
1380 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.
1381 )))
1382
1383 (((
1384 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1385
1386
1387 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1388 )))
1389
1390 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1391
1392
1393 == 5.2 Replace Battery ==
1394
1395
1396 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.
1397
1398 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1399
1400
1401 == 5.3 Battery Life Analyze ==
1402
1403
1404 (((
1405 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:
1406 [[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]]
1407 )))
1408
1409
1410 (((
1411 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]]
1412 )))
1413
1414
1415 = 6. FAQ =
1416
1417 == 6.1 How to use AT Command? ==
1418
1419
1420 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.
1421
1422 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1423
1424
1425 **Connection:**
1426
1427 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1428 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1429 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1430
1431 (((
1432 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.
1433 )))
1434
1435
1436 Input password and ATZ to activate LHT65N,As shown below:
1437
1438 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1439
1440
1441 AT Command List is as below:
1442
1443 AT+<CMD>? :  Help on <CMD>
1444
1445 AT+<CMD> :  Run <CMD>
1446
1447 AT+<CMD>=<value> :  Set the value
1448
1449 AT+<CMD>=? :  Get the value
1450
1451 AT+DEBUG:  Set more info output
1452
1453 ATZ:  Trig a reset of the MCU
1454
1455 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1456
1457 AT+DEUI:  Get or Set the Device EUI
1458
1459 AT+DADDR:  Get or Set the Device Address
1460
1461 AT+APPKEY:  Get or Set the Application Key
1462
1463 AT+NWKSKEY:  Get or Set the Network Session Key
1464
1465 AT+APPSKEY:  Get or Set the Application Session Key
1466
1467 AT+APPEUI:  Get or Set the Application EUI
1468
1469 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1470
1471 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1472
1473 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1474
1475 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1476
1477 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1478
1479 AT+RX2FQ:  Get or Set the Rx2 window frequency
1480
1481 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1482
1483 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1484
1485 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1486
1487 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1488
1489 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1490
1491 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1492
1493 AT+NWKID:  Get or Set the Network ID
1494
1495 AT+FCU:  Get or Set the Frame Counter Uplink
1496
1497 AT+FCD:  Get or Set the Frame Counter Downlink
1498
1499 AT+CLASS:  Get or Set the Device Class
1500
1501 AT+JOIN:  Join network
1502
1503 AT+NJS:  Get the join status
1504
1505 AT+SENDB:  Send hexadecimal data along with the application port
1506
1507 AT+SEND:  Send text data along with the application port
1508
1509 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1510
1511 AT+RECV:  Print last received data in raw format
1512
1513 AT+VER:  Get current image version and Frequency Band
1514
1515 AT+CFM:  Get or Set the confirmation mode (0-1)
1516
1517 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1518
1519 AT+SNR:  Get the SNR of the last received packet
1520
1521 AT+RSSI:  Get the RSSI of the last received packet
1522
1523 AT+TDC:  Get or set the application data transmission interval in ms
1524
1525 AT+PORT:  Get or set the application port
1526
1527 AT+DISAT:  Disable AT commands
1528
1529 AT+PWORD: Set password, max 9 digits
1530
1531 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1532
1533 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1534
1535 AT+PDTA:  Print the sector data from start page to stop page
1536
1537 AT+PLDTA:  Print the last few sets of data
1538
1539 AT+CLRDTA:  Clear the storage, record position back to 1st
1540
1541 AT+SLEEP:  Set sleep mode
1542
1543 AT+EXT:  Get or Set external sensor model
1544
1545 AT+BAT:  Get the current battery voltage in mV
1546
1547 AT+CFG:  Print all configurations
1548
1549 AT+WMOD:  Get or Set Work Mode
1550
1551 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1552
1553 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1554
1555 AT+SETCNT:  Set the count at present
1556
1557 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1558
1559 AT+RPL:  Get or set response level
1560
1561 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1562
1563 AT+LEAPSEC:  Get or Set Leap Second
1564
1565 AT+SYNCMOD:  Get or Set time synchronization method
1566
1567 AT+SYNCTDC:  Get or set time synchronization interval in day
1568
1569 AT+PID:  Get or set the PID
1570
1571
1572 == 6.2 Where to use AT commands and Downlink commands ==
1573
1574
1575 **AT commands：**
1576
1577 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1578
1579
1580 **Downlink commands:**
1581
1582
1583 (% style="color:blue" %)**TTN:**
1584
1585 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1586
1587
1588
1589 (% style="color:blue" %)**Helium：**
1590
1591 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1592
1593
1594
1595 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1596
1597
1598 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1599
1600
1601 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1602
1603
1604
1605 (% style="color:blue" %)**Aws:**
1606
1607 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1608
1609
1610 == 6.3 How to change the uplink interval？ ==
1611
1612
1613 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);"]]
1614
1615
1616 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1617
1618
1619 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1620
1621 [[image:1655802313617-381.png||_mstalt="293917"]]
1622
1623
1624 (((
1625 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.
1626 )))
1627
1628
1629 Input password and ATZ to activate LHT65N,As shown below:
1630
1631 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1632
1633
1634 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1635
1636
1637 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1638
1639
1640 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1641
1642 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1643
1644
1645
1646 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1647
1648 First connect the four lines；(% style="display:none" %)
1649
1650 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1651
1652
1653 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1654
1655 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1656
1657
1658
1659 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1660
1661 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1662
1663
1664 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1665
1666
1667 When this interface appears, it indicates that the download has been completed.
1668
1669 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1670
1671
1672 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1673
1674
1675 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1676
1677
1678 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1679
1680
1681 **UART Port of LHT65N:**
1682
1683 * (% class="mark" %)**PB0: RXD**
1684 * (% class="mark" %)**PB1: TXD**
1685 * (% class="mark" %)**GND**
1686
1687 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1688
1689
1690 (((
1691 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.
1692 )))
1693
1694
1695 Input password and ATZ to activate LHT65N,As shown below:
1696
1697 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1698
1699
1700 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1701
1702
1703 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1704
1705
1706 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1707
1708 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1709
1710
1711
1712 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1713
1714 First connect the four lines；
1715
1716 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1717
1718 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1719
1720
1721
1722 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1723
1724 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1725
1726
1727 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1728
1729
1730 When this interface appears, it indicates that the download has been completed.
1731
1732 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1733
1734
1735 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1736
1737
1738 == 6.8 Why can't I see the datalog information ==
1739
1740
1741 ~1. The time is not aligned, and the correct query command is not used.
1742
1743 2. Decoder error, did not parse the datalog data, the data was filtered.
1744
1745
1746 = 7. Order Info =
1747
1748
1749 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1750
1751 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1752
1753 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1754 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1755 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1756 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1757 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1758 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1759 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1760 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1761
1762 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1763
1764 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1765
1766
1767 = 8. Packing Info =
1768
1769
1770 **Package Includes**:
1771
1772 * LHT65N Temperature & Humidity Sensor x 1
1773 * Optional external sensor
1774
1775 **Dimension and weight**:
1776
1777 * Device Size:  10 x 10 x 3.5 mm
1778 * Device Weight: 120.5g
1779
1780
1781 = 9. Reference material =
1782
1783
1784 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1785
1786
1787 = 10. FCC Warning =
1788
1789
1790 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1791
1792 (1) This device may not cause harmful interference；
1793
1794 (2) this device must accept any interference received, including interference that may cause undesired operation.
1795
1796
1797