Last modified by Xiaoling on 2022/12/02 17:13
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
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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
63 == 1.3 Specification ==
64
65
66 (% style="color:#037691" %)**Built-in Temperature Sensor:**
67
68 * Resolution: 0.01 °C
69 * Accuracy Tolerance : Typ ±0.3 °C
70 * Long Term Drift: < 0.02 °C/yr
71 * Operating Range: -40 ~~ 85 °C
72
73 (% style="color:#037691" %)**Built-in Humidity Sensor:**
74
75 * Resolution: 0.04 %RH
76 * Accuracy Tolerance : Typ ±3 %RH
77 * Long Term Drift: < 0.02 °C/yr
78 * Operating Range: 0 ~~ 96 %RH
79
80 (% style="color:#037691" %)**External Temperature Sensor:**
81
82 * Resolution: 0.0625 °C
83 * ±0.5°C accuracy from -10°C to +85°C
84 * ±2°C accuracy from -55°C to +125°C
85 * Operating Range: -55 °C ~~ 125 °C
86
87
88
89 = 2. Connect LHT65N to IoT Server =
90
91 == 2.1 How does LHT65N work? ==
92
93
94 (((
95 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.
96 )))
97
98 (((
99 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.
100 )))
101
102
103 == 2.2 How to Activate LHT65N? ==
104
105
106 (((
107 The LHT65N has two working modes:
108 )))
109
110 * (((
111 (% 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.
112 )))
113 * (((
114 (% 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. 
115 )))
116
117 (((
118 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
119 )))
120
121
122 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
123
124 [[image:image-20220525110604-2.png||_mstalt="427531"]]
125
126
127 == 2.3 Example to join LoRaWAN network ==
128
129
130 (% class="wikigeneratedid" %)
131 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.
132
133
134 (% class="wikigeneratedid" %)
135 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
136
137
138 (((
139 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:
140 )))
141
142
143 === 2.3.1 Step 1: Create Device n TTN ===
144
145
146 (((
147 Create a device in TTN V3 with the OTAA keys from LHT65N.
148 )))
149
150 (((
151 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
152 )))
153
154 [[image:image-20220617150003-1.jpeg||_mstalt="5426434"]]
155
156 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
157
158 Add APP EUI in the application.
159
160
161 [[image:image-20220522232916-3.png||_mstalt="430495"]]
162
163
164 [[image:image-20220522232932-4.png||_mstalt="430157"]]
165
166
167 [[image:image-20220522232954-5.png||_mstalt="431847"]]
168
169
170
171 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
172
173
174 [[image:image-20220522233026-6.png||_mstalt="429403"]]
175
176
177 Input APP EUI,  APP KEY and DEV EUI:
178
179
180 [[image:image-20220522233118-7.png||_mstalt="430430"]]
181
182
183 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
184
185
186 (((
187 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.
188 )))
189
190 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
191
192
193 == 2.4 Uplink Payload   ( Fport~=2) ==
194
195
196 (((
197 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
198 )))
199
200 (((
201 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
202 )))
203
204 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
205 |=(% style="width: 60px;" %)(((
206 **Size(bytes)**
207 )))|=(% style="width: 30px;" %)(((
208 **2**
209 )))|=(% style="width: 100px;" %)(((
210 **2**
211 )))|=(% style="width: 100px;" %)(((
212 **2**
213 )))|=(% style="width: 50px;" %)(((
214 **1**
215 )))|=(% style="width: 50px;" %)(((
216 **4**
217 )))
218 |(% style="width:97px" %)(((
219 **Value**
220 )))|(% style="width:39px" %)(((
221 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
222 )))|(% style="width:100px" %)(((
223 (((
224 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
225 )))
226 )))|(% style="width:77px" %)(((
227 (((
228 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
229 )))
230 )))|(% style="width:47px" %)(((
231 [[Ext>>||anchor="H2.4.5Ext23"]] #
232 )))|(% style="width:51px" %)(((
233 [[Ext value>>||anchor="H2.4.6Extvalue"]]
234 )))
235
236 * The First 6 bytes: has fix meanings for every LHT65N.
237 * The 7th byte (EXT #): defines the external sensor model.
238 * 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.)
239
240
241
242 === 2.4.1 Decoder in TTN V3 ===
243
244
245 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.
246
247 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]]
248
249
250 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
251
252
253 === 2.4.2 BAT-Battery Info ===
254
255
256 These two bytes of BAT include the battery state and the actually voltage
257
258 [[image:image-20220523152839-18.png||_mstalt="457613"]]
259
260
261 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
262
263
264 Check the battery voltage for LHT65N.
265
266 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
267 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
268
269
270
271 === 2.4.3 Built-in Temperature ===
272
273
274 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
275
276 * Temperature:  0x0ABB/100=27.47℃
277
278 [[image:image-20220522235639-3.png||_mstalt="432120"]]
279
280 * Temperature:  (0xF5C6-65536)/100=-26.18℃
281
282
283
284 === 2.4.4 Built-in Humidity ===
285
286
287 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
288
289 * Humidity:    0x025C/10=60.4%
290
291
292
293 === 2.4.5 Ext # ===
294
295
296 Bytes for External Sensor:
297
298 [[image:image-20220523152822-17.png||_mstalt="454545"]]
299
300
301 === 2.4.6 Ext value ===
302
303 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
304
305
306 [[image:image-20220522235639-5.png||_mstalt="432848"]]
307
308
309 * DS18B20 temp=0x0ADD/100=27.81℃
310
311 The last 2 bytes of data are meaningless
312
313
314
315 [[image:image-20220522235639-6.png||_mstalt="433212"]]
316
317
318 * External temperature= (0xF54F-65536)/100=-27.37℃
319
320 The last 2 bytes of data are meaningless
321
322 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
323
324
325 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
326
327
328 (((
329 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:
330 )))
331
332 (((
333
334 )))
335
336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
337 |=(% style="width: 50px;" %)(((
338 **Size(bytes)**
339 )))|=(% style="width: 70px;" %)(((
340 **2**
341 )))|=(% style="width: 120px;" %)(((
342 **2**
343 )))|=(% style="width: 120px;" %)(((
344 **2**
345 )))|=(% style="width: 50px;" %)(((
346 **1**
347 )))|=(% style="width: 70px;" %)(((
348 **4**
349 )))
350 |(% style="width:110px" %)(((
351 **Value**
352 )))|(% style="width:71px" %)(((
353 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
354 )))|(% style="width:99px" %)(((
355 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
356 )))|(% style="width:132px" %)(((
357 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
358 )))|(% style="width:54px" %)(((
359 Status & Ext
360 )))|(% style="width:64px" %)(((
361 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
362 )))
363
364 * **Battery status & Built-in Humidity**
365
366 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
367 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
368 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
369 BAT Status
370 00(b): Ultra Low ( BAT <= 2.50v)
371 01(b): Low  (2.50v <=BAT <= 2.55v)
372 10(b): OK   (2.55v <= BAT <=2.65v)
373 11(b): Good   (BAT >= 2.65v)
374 )))|(% style="width:132px" %)(((
375 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
376 )))
377
378 * **Status & Ext Byte**
379
380 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
381 |=(% 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]**
382 |=(% 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)
383
384 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
385 * (% 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.
386 * (% 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)
387
388
389
390 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
391
392
393 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
394
395 be used to power the external ADC sensor; user can control the power on time for this
396
397 (% style="color:blue" %)**sensor by setting:**
398
399 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
400
401 **For example:**
402
403 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
404
405
406 Or use **downlink command A2** to set the same.
407
408 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
409
410 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.
411
412 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
413
414
415 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
416
417 [[image:image-20220628150714-4.png||_mstalt="431054"]]
418
419
420 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.
421
422
423 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
424
425 [[image:image-20220628151005-5.png||_mstalt="429546"]]
426
427
428 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
429
430 [[image:image-20220628151056-6.png||_mstalt="431873"]]
431
432
433 3) Within range
434
435 [[image:image-20220628151143-7.png||_mstalt="431210"]]
436
437
438 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
439
440
441 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
442
443
444 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
445
446 [[image:image-20220906102307-7.png||_mstalt="430443"]]
447
448
449 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
450
451 The external cable NE2 can be use for MOD4 and MOD8
452
453
454 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
455
456
457 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
458
459
460 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
461
462 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
463
464 In Open State, the power consumption is the same as if there is no probe
465
466 In Close state, the power consumption will be 3uA higher than normal.
467
468 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
469
470
471 Ext=4,Interrupt Sensor：
472
473 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
474 |(% style="width:101px" %)(((
475 AT+EXT=4,1
476 )))|(% style="width:373px" %)(((
477 Sent uplink packet in both rising and falling interrupt
478 )))
479 |(% style="width:101px" %)(((
480 AT+EXT=4,2
481 )))|(% style="width:373px" %)(((
482 Sent uplink packet only in falling interrupt
483 )))
484 |(% style="width:101px" %)(((
485 AT+EXT=4,3
486 )))|(% style="width:373px" %)(((
487 Sent uplink packet only in rising interrupt
488 )))
489
490 Trigger by falling edge:
491
492 [[image:image-20220906101145-2.png||_mstalt="428324"]]
493
494
495 Trigger by raising edge：
496
497 [[image:image-20220906101145-3.png||_mstalt="428688"]]
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 (((
674 **2. Manually Set Time**
675 )))
676
677 (((
678 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
679 )))
680
681
682 === 2.6.4 Poll sensor value ===
683
684
685 User can poll sensor value based on timestamps from the server. Below is the downlink command.
686
687 [[image:image-20220523152302-15.png||_mstalt="451581"]]
688
689
690 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.
691
692 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
693
694 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
695
696 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
697
698
699 === 2.6.5 Datalog Uplink payload ===
700
701
702 The Datalog poll reply uplink will use below payload format.
703
704 **Retrieval data payload:**
705
706 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
707 |=(% style="width: 60px;" %)(((
708 **Size(bytes)**
709 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
710 |(% 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"]]
711
712 **Poll message flag & Ext:**
713
714 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
715
716 (% 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)
717
718 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
719
720 * Poll Message Flag is set to 1.
721
722 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
723
724 For example, in US915 band, the max payload for different DR is:
725
726 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
727
728 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
729
730 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
731
732 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
733
734 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
735
736
737 **Example:**
738
739 If LHT65N has below data inside Flash:
740
741 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
742
743
744 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
745
746 Where : Start time: 60065F97 = time 21/1/19 04:27:03
747
748 Stop time: 60066DA7= time 21/1/19 05:27:03
749
750
751 **LHT65N will uplink this payload.**
752
753 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
754
755
756 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
757
758 Where the first 11 bytes is for the first entry:
759
760 7FFF089801464160065F97
761
762 Ext sensor data=0x7FFF/100=327.67
763
764 Temp=0x088E/100=22.00
765
766 Hum=0x014B/10=32.6
767
768 poll message flag & Ext=0x41,means reply data,Ext=1
769
770 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
771
772
773 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
774
775
776 (((
777 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.
778 )))
779
780 (((
781 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
782
783
784 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
785
786
787 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
788
789 (((
790 (% class="box infomessage" %)
791 (((
792 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
793
794 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
795
796 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
797
798 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
799
800 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
801
802 **AT+LEDALARM=1** :       Enable LED visual Alarm.
803 )))
804 )))
805
806 (% style="color:#4f81bd" %)**Downlink Command:**
807
808 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
809
810 AT+CITEMP=1 : A60001
811
812 AT+ARTEMP=1,60  :  A70001003C
813
814 AT+ARTEMP=-16,60 :  A7FFF0003C
815
816 AT+LEDALARM=1  :  3601
817
818
819 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
820
821 Total bytes: 8 bytes
822
823 **Example: **AA0100010001003C
824
825 WMOD=01
826
827 CITEMP=0001
828
829 TEMPlow=0001
830
831 TEMPhigh=003C
832
833
834 **DS18B20 and TMP117 Threshold Alarm**
835
836 **~ AT+WMOD=1,60,-10,20**
837
838 (% style="color:#4f81bd" %)**Downlink Command:**
839
840 **Example: **A5013CFC180014
841
842 MOD=01
843
844 CITEMP=3C(S)
845
846 TEMPlow=FC18
847
848 TEMPhigh=0014
849
850
851 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
852
853 **AT+WMOD=2,60,5** 
854
855 (% style="color:#4f81bd" %)**Downlink Command:**
856
857 **Example: **A5023C05
858
859 MOD=02
860
861 CITEMP=3C(S)
862
863 temperature fluctuation=05
864
865
866 ==== **Sampling multiple times and uplink together** ====
867
868 **AT+WMOD=3,1,60,20,-16,32,1**   
869
870 Explain:
871
872 * Set Working Mode to **Mode 3**
873 * Sampling Interval is **60**s.
874 * 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 * Temperature alarm range is **-16** to **32**°C,
876 * **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 EXT=01
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
897 **Uplink payload( Fport=3)**
898
899 **Example: CBEA**01**0992**//0A41//**09C4**
900
901 BatV=CBEA
902
903 EXT=01
904
905 Temp1=0992  ~/~/ 24.50℃
906
907 Temp2=0A41  ~/~/ 26.25℃
908
909 Temp3=09C4  ~/~/ 25.00℃
910
911
912 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
913
914 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
915 )))
916
917
918 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
919
920
921 (% class="box infomessage" %)
922 (((
923 (((
924 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
925 )))
926
927 (((
928 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
929 )))
930
931 (((
932 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
933 )))
934
935 (((
936 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
937 )))
938
939 (((
940 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
941 )))
942 )))
943
944 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
945
946 Total bytes: 8 bytes
947
948 **Example:**AA0100010001003C
949
950 WMOD=01
951
952 CITEMP=0001
953
954 TEMPlow=0001
955
956 TEMPhigh=003C
957
958
959 == 2.8 LED Indicator ==
960
961
962 The LHT65 has a triple color LED which for easy showing different stage .
963
964 While user press ACT button, the LED will work as per LED status with ACT button.
965
966 In a normal working state:
967
968 * For each uplink, the BLUE LED or RED LED will blink once.
969 BLUE LED when external sensor is connected.
970 * RED LED when external sensor is not connected
971 * For each success downlink, the PURPLE LED will blink once
972
973
974
975 == 2.9 installation ==
976
977
978 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
979
980
981 = 3. Sensors and Accessories =
982
983 == 3.1 E2 Extension Cable ==
984
985
986 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
987
988
989 **1m long breakout cable for LHT65N. Features:**
990
991 * (((
992 Use for AT Command， works for both LHT52/LHT65N
993 )))
994 * (((
995 Update firmware for LHT65N, works for both LHT52/LHT65N
996 )))
997 * (((
998 Supports ADC mode to monitor external ADC
999 )))
1000 * (((
1001 Supports Interrupt mode
1002 )))
1003 * (((
1004 Exposed All pins from the LHT65N Type-C connector.
1005
1006
1007
1008 )))
1009
1010 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1011
1012
1013 == 3.2 E3 Temperature Probe ==
1014
1015
1016 [[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"]]
1017
1018
1019 Temperature sensor with 2 meters cable long
1020
1021 * Resolution: 0.0625 °C
1022 * ±0.5°C accuracy from -10°C to +85°C
1023 * ±2°C accuracy from -55°C to +125°C
1024 * Operating Range: -40 ~~ 125 °C
1025 * Working voltage 2.35v ~~ 5v
1026
1027
1028
1029 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1030
1031
1032 (((
1033 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1034 )))
1035
1036 * (((
1037 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1038 )))
1039
1040 * (((
1041 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1042 )))
1043
1044 (((
1045 There are two kinds of commands to configure LHT65N, they are:
1046 )))
1047
1048 * (((
1049 (% style="color:#4f81bd" %)**General Commands**.
1050 )))
1051
1052 (((
1053 These commands are to configure:
1054 )))
1055
1056 1. (((
1057 General system settings like: uplink interval.
1058 )))
1059 1. (((
1060 LoRaWAN protocol & radio-related commands.
1061 )))
1062
1063 (((
1064 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]]
1065 )))
1066
1067 * (((
1068 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1069 )))
1070
1071 (((
1072 These commands are only valid for LHT65N, as below:
1073 )))
1074
1075
1076 == 4.1 Set Transmit Interval Time ==
1077
1078
1079 Feature: Change LoRaWAN End Node Transmit Interval.
1080
1081
1082 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1083
1084 [[image:image-20220523150701-2.png||_mstalt="427453"]]
1085
1086
1087 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1088
1089 Format: Command Code (0x01) followed by 3 bytes time value.
1090
1091 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1092
1093 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1094
1095 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1096
1097
1098
1099 == 4.2 Set External Sensor Mode ==
1100
1101
1102 Feature: Change External Sensor Mode.
1103
1104
1105 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1106
1107 [[image:image-20220523150759-3.png||_mstalt="432146"]]
1108
1109
1110 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1111
1112 Total bytes: 2 ~~ 5 bytes
1113
1114 **Example:**
1115
1116 * 0xA201: Set external sensor type to E1
1117
1118 * 0xA209: Same as AT+EXT=9
1119
1120 * 0xA20702003c: Same as AT+SETCNT=60
1121
1122
1123
1124 == 4.3 Enable/Disable uplink Temperature probe ID ==
1125
1126
1127 (((
1128 Feature: If PID is enabled, device will send the temperature probe ID on:
1129 )))
1130
1131 * (((
1132 First Packet after OTAA Join
1133 )))
1134 * (((
1135 Every 24 hours since the first packet.
1136 )))
1137
1138 (((
1139 PID is default set to disable (0)
1140
1141
1142 )))
1143
1144 (% style="color:#4f81bd" %)**AT Command:**
1145
1146 [[image:image-20220523150928-4.png||_mstalt="431821"]]
1147
1148
1149 (% style="color:#4f81bd" %)**Downlink Command:**
1150
1151 * **0xA800**  **~-~->** AT+PID=0
1152 * **0xA801**     **~-~->** AT+PID=1
1153
1154
1155
1156 == 4.4 Set Password ==
1157
1158
1159 Feature: Set device password, max 9 digits
1160
1161
1162 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1163
1164 [[image:image-20220523151052-5.png||_mstalt="428623"]]
1165
1166
1167 (% style="color:#4f81bd" %)**Downlink Command:**
1168
1169 No downlink command for this feature.
1170
1171
1172 == 4.5 Quit AT Command ==
1173
1174
1175 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1176
1177
1178 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1179
1180 [[image:image-20220523151132-6.png||_mstalt="428649"]]
1181
1182
1183 (% style="color:#4f81bd" %)**Downlink Command:**
1184
1185 No downlink command for this feature.
1186
1187
1188 == 4.6 Set to sleep mode ==
1189
1190
1191 Feature: Set device to sleep mode
1192
1193 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1194 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1195
1196 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1197
1198 [[image:image-20220523151218-7.png||_mstalt="430703"]]
1199
1200
1201 (% style="color:#4f81bd" %)**Downlink Command:**
1202
1203 * There is no downlink command to set to Sleep mode.
1204
1205
1206
1207 == 4.7 Set system time ==
1208
1209
1210 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1211
1212
1213 (% style="color:#4f81bd" %)**AT Command:**
1214
1215 [[image:image-20220523151253-8.png||_mstalt="430677"]]
1216
1217
1218 (% style="color:#4f81bd" %)**Downlink Command:**
1219
1220 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1221
1222
1223 == 4.8 Set Time Sync Mode ==
1224
1225
1226 (((
1227 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1228 )))
1229
1230 (((
1231 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.
1232
1233
1234 )))
1235
1236 (% style="color:#4f81bd" %)**AT Command:**
1237
1238 [[image:image-20220523151336-9.png||_mstalt="431717"]]
1239
1240
1241 (% style="color:#4f81bd" %)**Downlink Command:**
1242
1243 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1244 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1245
1246
1247 == 4.9 Set Time Sync Interval ==
1248
1249
1250 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1251
1252
1253 (% style="color:#4f81bd" %)**AT Command:**
1254
1255 [[image:image-20220523151411-10.png||_mstalt="449696"]]
1256
1257
1258 (% style="color:#4f81bd" %)**Downlink Command:**
1259
1260 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1261
1262
1263 == 4.10 Print data entries base on page. ==
1264
1265
1266 Feature: Print the sector data from start page to stop page (max is 416 pages).
1267
1268
1269 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1270
1271 [[image:image-20220523151450-11.png||_mstalt="451035"]]
1272
1273
1274 (% style="color:#4f81bd" %)**Downlink Command:**
1275
1276 No downlink commands for feature
1277
1278
1279 == 4.11 Print last few data entries. ==
1280
1281
1282 Feature: Print the last few data entries
1283
1284
1285 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1286
1287 [[image:image-20220523151524-12.png||_mstalt="452101"]]
1288
1289
1290 (% style="color:#4f81bd" %)**Downlink Command:**
1291
1292 No downlink commands for feature
1293
1294
1295 == 4.12 Clear Flash Record ==
1296
1297
1298 Feature: Clear flash storage for data log feature.
1299
1300
1301 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1302
1303 [[image:image-20220523151556-13.png||_mstalt="454129"]]
1304
1305
1306 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1307
1308 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1309
1310
1311
1312 == 4.13 Auto Send None-ACK messages ==
1313
1314
1315 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.
1316
1317
1318 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1319
1320 The default factory setting is 0
1321
1322 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1323 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1324 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1325
1326 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1327
1328 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1329
1330
1331
1332 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1333
1334
1335 Feature: Set internal and external temperature sensor alarms.
1336
1337 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1338 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1339 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1340
1341 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1342
1343 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1344
1345 0): Cancel
1346
1347 1): Threshold alarm
1348
1349 2): Fluctuation alarm
1350
1351
1352 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1353
1354 (% 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.**
1355
1356
1357 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1358
1359 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1360
1361 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1362
1363
1364 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.
1365
1366 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1367
1368 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1369
1370
1371 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1372
1373 0xA5 00 ~-~- AT+WMOD=0.
1374
1375 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 )
1376
1377 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))
1378
1379 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1380
1381 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.
1382
1383
1384 = 5. Battery & How to replace =
1385
1386 == 5.1 Battery Type ==
1387
1388
1389 (((
1390 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.
1391 )))
1392
1393 (((
1394 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1395
1396
1397 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1398 )))
1399
1400 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1401
1402
1403 == 5.2 Replace Battery ==
1404
1405
1406 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.
1407
1408 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1409
1410
1411 == 5.3 Battery Life Analyze ==
1412
1413
1414 (((
1415 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:
1416 [[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]]
1417 )))
1418
1419
1420 (((
1421 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]]
1422 )))
1423
1424
1425 = 6. FAQ =
1426
1427 == 6.1 How to use AT Command? ==
1428
1429
1430 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.
1431
1432 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1433
1434
1435 **Connection:**
1436
1437 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1438 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1439 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1440
1441 (((
1442 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.
1443 )))
1444
1445
1446 Input password and ATZ to activate LHT65N,As shown below:
1447
1448 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1449
1450
1451 AT Command List is as below:
1452
1453 AT+<CMD>? :  Help on <CMD>
1454
1455 AT+<CMD> :  Run <CMD>
1456
1457 AT+<CMD>=<value> :  Set the value
1458
1459 AT+<CMD>=? :  Get the value
1460
1461 AT+DEBUG:  Set more info output
1462
1463 ATZ:  Trig a reset of the MCU
1464
1465 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1466
1467 AT+DEUI:  Get or Set the Device EUI
1468
1469 AT+DADDR:  Get or Set the Device Address
1470
1471 AT+APPKEY:  Get or Set the Application Key
1472
1473 AT+NWKSKEY:  Get or Set the Network Session Key
1474
1475 AT+APPSKEY:  Get or Set the Application Session Key
1476
1477 AT+APPEUI:  Get or Set the Application EUI
1478
1479 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1480
1481 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1482
1483 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1484
1485 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1486
1487 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1488
1489 AT+RX2FQ:  Get or Set the Rx2 window frequency
1490
1491 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1492
1493 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1494
1495 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1496
1497 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1498
1499 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1500
1501 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1502
1503 AT+NWKID:  Get or Set the Network ID
1504
1505 AT+FCU:  Get or Set the Frame Counter Uplink
1506
1507 AT+FCD:  Get or Set the Frame Counter Downlink
1508
1509 AT+CLASS:  Get or Set the Device Class
1510
1511 AT+JOIN:  Join network
1512
1513 AT+NJS:  Get the join status
1514
1515 AT+SENDB:  Send hexadecimal data along with the application port
1516
1517 AT+SEND:  Send text data along with the application port
1518
1519 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1520
1521 AT+RECV:  Print last received data in raw format
1522
1523 AT+VER:  Get current image version and Frequency Band
1524
1525 AT+CFM:  Get or Set the confirmation mode (0-1)
1526
1527 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1528
1529 AT+SNR:  Get the SNR of the last received packet
1530
1531 AT+RSSI:  Get the RSSI of the last received packet
1532
1533 AT+TDC:  Get or set the application data transmission interval in ms
1534
1535 AT+PORT:  Get or set the application port
1536
1537 AT+DISAT:  Disable AT commands
1538
1539 AT+PWORD: Set password, max 9 digits
1540
1541 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1542
1543 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1544
1545 AT+PDTA:  Print the sector data from start page to stop page
1546
1547 AT+PLDTA:  Print the last few sets of data
1548
1549 AT+CLRDTA:  Clear the storage, record position back to 1st
1550
1551 AT+SLEEP:  Set sleep mode
1552
1553 AT+EXT:  Get or Set external sensor model
1554
1555 AT+BAT:  Get the current battery voltage in mV
1556
1557 AT+CFG:  Print all configurations
1558
1559 AT+WMOD:  Get or Set Work Mode
1560
1561 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1562
1563 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1564
1565 AT+SETCNT:  Set the count at present
1566
1567 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1568
1569 AT+RPL:  Get or set response level
1570
1571 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1572
1573 AT+LEAPSEC:  Get or Set Leap Second
1574
1575 AT+SYNCMOD:  Get or Set time synchronization method
1576
1577 AT+SYNCTDC:  Get or set time synchronization interval in day
1578
1579 AT+PID:  Get or set the PID
1580
1581
1582 == 6.2 Where to use AT commands and Downlink commands ==
1583
1584
1585 **AT commands：**
1586
1587 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1588
1589
1590 **Downlink commands:**
1591
1592
1593
1594 (% style="color:blue" %)**TTN:**
1595
1596 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1597
1598
1599
1600 (% style="color:blue" %)**Helium：**
1601
1602 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1603
1604
1605
1606 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1607
1608
1609 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1610
1611
1612 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1613
1614
1615
1616 (% style="color:blue" %)**Aws:**
1617
1618 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1619
1620
1621 == 6.3 How to change the uplink interval？ ==
1622
1623
1624 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);"]]
1625
1626
1627 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1628
1629
1630 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1631
1632 [[image:1655802313617-381.png||_mstalt="293917"]]
1633
1634
1635 (((
1636 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.
1637 )))
1638
1639
1640 Input password and ATZ to activate LHT65N,As shown below:
1641
1642 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1643
1644
1645 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1646
1647
1648 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1649
1650
1651 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1652
1653 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1654
1655
1656
1657 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1658
1659 First connect the four lines；(% style="display:none" %)
1660
1661 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1662
1663
1664 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1665
1666 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1667
1668
1669
1670 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1671
1672 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1673
1674
1675 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1676
1677
1678 When this interface appears, it indicates that the download has been completed.
1679
1680 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1681
1682
1683 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1684
1685
1686 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1687
1688
1689 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1690
1691
1692 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1693
1694
1695 (((
1696 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.
1697 )))
1698
1699
1700 Input password and ATZ to activate LHT65N,As shown below:
1701
1702 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1703
1704
1705 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1706
1707
1708 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1709
1710
1711 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1712
1713 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1714
1715
1716
1717 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1718
1719 First connect the four lines；
1720
1721 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1722
1723 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1724
1725
1726
1727 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1728
1729 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1730
1731
1732 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1733
1734
1735 When this interface appears, it indicates that the download has been completed.
1736
1737 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1738
1739
1740 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1741
1742
1743 = 7. Order Info =
1744
1745
1746 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1747
1748 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1749
1750 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1751 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1752 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1753 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1754 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1755 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1756 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1757 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1758
1759 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1760
1761 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1762
1763
1764
1765 = 8. Packing Info =
1766
1767
1768 **Package Includes**:
1769
1770 * LHT65N Temperature & Humidity Sensor x 1
1771 * Optional external sensor
1772
1773 **Dimension and weight**:
1774
1775 * Device Size:  10 x 10 x 3.5 mm
1776 * Device Weight: 120.5g
1777
1778
1779
1780 = 9. Reference material =
1781
1782
1783 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1784
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

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