Version 218.1 by Bei Jinggeng on 2022/11/16 15:24
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9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
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11 {{toc/}}
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15
16
17 = 1. Introduction =
18
19
20 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
21
22
23 (((
24 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.**
25 )))
26
27 (((
28 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.
29 )))
30
31 (((
32 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
33 )))
34
35 (((
36 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
37 )))
38
39 (((
40 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.
41 )))
42
43 (((
44 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
45 )))
46
47
48
49 == 1.2 Features ==
50
51
52 * Wall mountable
53 * LoRaWAN v1.0.3 Class A protocol
54 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
55 * AT Commands to change parameters
56 * Remote configure parameters via LoRaWAN Downlink
57 * Firmware upgradeable via program port
58 * Built-in 2400mAh battery for up to 10 years of use.
59 * Built-in Temperature & Humidity sensor
60 * Optional External Sensors
61 * Tri-color LED to indicate working status
62 * Datalog feature (Max 3328 records)
63
64
65 == 1.3 Specification ==
66
67
68 (% style="color:#037691" %)**Built-in Temperature Sensor:**
69
70 * Resolution: 0.01 °C
71 * Accuracy Tolerance : Typ ±0.3 °C
72 * Long Term Drift: < 0.02 °C/yr
73 * Operating Range: -40 ~~ 85 °C
74
75 (% style="color:#037691" %)**Built-in Humidity Sensor:**
76
77 * Resolution: 0.04 %RH
78 * Accuracy Tolerance : Typ ±3 %RH
79 * Long Term Drift: < 0.02 °C/yr
80 * Operating Range: 0 ~~ 96 %RH
81
82 (% style="color:#037691" %)**External Temperature Sensor:**
83
84 * Resolution: 0.0625 °C
85 * ±0.5°C accuracy from -10°C to +85°C
86 * ±2°C accuracy from -55°C to +125°C
87 * Operating Range: -55 °C ~~ 125 °C
88
89
90 = 2. Connect LHT65N to IoT Server =
91
92
93 == 2.1 How does LHT65N work? ==
94
95
96 (((
97 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.
98 )))
99
100 (((
101 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.
102 )))
103
104
105
106 == 2.2 How to Activate LHT65N? ==
107
108
109 (((
110 The LHT65N has two working modes:
111 )))
112
113 * (((
114 (% 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.
115 )))
116 * (((
117 (% 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. 
118 )))
119
120 (((
121 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
122 )))
123
124
125 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
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127 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
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129
130
131 == 2.3 Example to join LoRaWAN network ==
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134 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
135 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.
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138 (% _mstvisible="1" class="wikigeneratedid" %)
139 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
140
141
142 (((
143 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:
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145
146
147
148 === 2.3.1 Step 1: Create Device n TTN ===
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150
151 (((
152 Create a device in TTN V3 with the OTAA keys from LHT65N.
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154
155 (((
156 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
157 )))
158
159 [[image:image-20220617150003-1.jpeg]]
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161 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
162
163 Add APP EUI in the application.
164
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166 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
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169 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
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172 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
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174
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176 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
177
178
179 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
180
181
182 Input APP EUI,  APP KEY and DEV EUI:
183
184
185 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
186
187
188
189 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
190
191
192 (((
193 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.
194 )))
195
196 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
197
198
199
200 == 2.4 Uplink Payload   ( Fport~=2) ==
201
202
203 (((
204 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% _mstvisible="3" style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
205 )))
206
207 (((
208 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
209 )))
210
211 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
212 |=(% style="width: 60px;" %)(((
213 **Size(bytes)**
214 )))|=(% style="width: 30px;" %)(((
215 **2**
216 )))|=(% style="width: 100px;" %)(((
217 **2**
218 )))|=(% style="width: 100px;" %)(((
219 **2**
220 )))|=(% style="width: 50px;" %)(((
221 **1**
222 )))|=(% style="width: 50px;" %)(((
223 **4**
224 )))
225 |(% style="width:97px" %)(((
226 **Value**
227 )))|(% style="width:39px" %)(((
228 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
229 )))|(% style="width:100px" %)(((
230 (((
231 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
232 )))
233 )))|(% style="width:77px" %)(((
234 (((
235 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
236 )))
237 )))|(% style="width:47px" %)(((
238 [[Ext>>||anchor="H2.4.5Ext23"]] #
239 )))|(% style="width:51px" %)(((
240 [[Ext value>>||anchor="H2.4.6Extvalue"]]
241 )))
242
243 * The First 6 bytes: has fix meanings for every LHT65N.
244 * The 7th byte (EXT #): defines the external sensor model.
245 * The 8(% _msthash="734578" _msttexthash="21372" _mstvisible="4" %)^^th^^(%%) ~~ 11(% _msthash="734579" _msttexthash="21372" _mstvisible="4" %)^^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.)
246
247
248 === 2.4.1 Decoder in TTN V3 ===
249
250
251 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.
252
253 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]]
254
255
256 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
257
258
259
260 === 2.4.2 BAT-Battery Info ===
261
262
263 These two bytes of BAT include the battery state and the actually voltage
264
265 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
266
267
268 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
269
270
271 Check the battery voltage for LHT65N.
272
273 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
274 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
275
276
277 === 2.4.3 Built-in Temperature ===
278
279
280 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
281
282 * Temperature:  0x0ABB/100=27.47℃
283
284 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
285
286 * Temperature:  (0xF5C6-65536)/100=-26.18℃
287
288
289 === 2.4.4 Built-in Humidity ===
290
291
292 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
293
294 * Humidity:    0x025C/10=60.4%
295
296
297 === 2.4.5 Ext # ===
298
299
300 Bytes for External Sensor:
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302 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
303
304
305
306 === 2.4.6 Ext value ===
307
308
309 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
310
311
312 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
313
314
315 * DS18B20 temp=0x0ADD/100=27.81℃
316
317 The last 2 bytes of data are meaningless
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319
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321 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
322
323
324 * External temperature= (0xF54F-65536)/100=-27.37℃
325
326 The last 2 bytes of data are meaningless
327
328 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
329
330
331
332 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
333
334
335 (((
336 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:
337 )))
338
339 (((
340
341 )))
342
343 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
344 |=(% style="width: 50px;" %)(((
345 **Size(bytes)**
346 )))|=(% style="width: 70px;" %)(((
347 **2**
348 )))|=(% style="width: 120px;" %)(((
349 **2**
350 )))|=(% style="width: 120px;" %)(((
351 **2**
352 )))|=(% style="width: 50px;" %)(((
353 **1**
354 )))|=(% style="width: 70px;" %)(((
355 **4**
356 )))
357 |(% style="width:110px" %)(((
358 **Value**
359 )))|(% style="width:71px" %)(((
360 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
361 )))|(% style="width:99px" %)(((
362 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
363 )))|(% style="width:132px" %)(((
364 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
365 )))|(% style="width:54px" %)(((
366 Status & Ext
367 )))|(% style="width:64px" %)(((
368 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
369 )))
370
371 * **Battery status & Built-in Humidity**
372
373 (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
374 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
375 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
376 BAT Status
377 00(b): Ultra Low ( BAT <= 2.50v)
378 01(b): Low  (2.50v <=BAT <= 2.55v)
379 10(b): OK   (2.55v <= BAT <=2.65v)
380 11(b): Good   (BAT >= 2.65v)
381 )))|(% style="width:132px" %)(((
382 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
383 )))
384
385 * **Status & Ext Byte**
386
387 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
388 |=(% 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]**
389 |=(% 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)
390
391 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
392 * (% 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.
393 * (% 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)
394
395
396 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
397
398
399 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
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401 be used to power the external ADC sensor; user can control the power on time for this
402
403 (% style="color:blue" %)**sensor by setting:**
404
405 **AT+EXT=6,timeout**  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
406
407 **For example:**
408
409 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
410
411
412 Or use **downlink command A2** to set the same.
413
414 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
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416 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.
417
418 [[image:image-20220628150112-1.png||height="241" width="285"]]
419
420
421 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
422
423 [[image:image-20220628150714-4.png]]
424
425
426 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.
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429 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
430
431 [[image:image-20220628151005-5.png]]
432
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434 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
435
436 [[image:image-20220628151056-6.png]]
437
438
439 3) Within range
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441 [[image:image-20220628151143-7.png]]
442
443
444
445 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
446
447
448 [[image:image-20220927095645-1.png||height="534" width="460"]]
449
450
451 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
452
453 [[image:image-20220906102307-7.png]]
454
455
456 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
457
458 The external cable NE2 can be use for MOD4 and MOD8
459
460
461
462 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
463
464
465 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
466
467
468 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
469
470 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
471
472 In Open State, the power consumption is the same as if there is no probe
473
474 In Close state, the power consumption will be 3uA higher than normal.
475
476 [[image:image-20220906100852-1.png||height="205" width="377"]]
477
478
479 Ext=4,Interrupt Sensor：
480
481 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
482 |(% style="width:101px" %)(((
483 AT+EXT=4,1
484 )))|(% style="width:373px" %)(((
485 Sent uplink packet in both rising and falling interrupt
486 )))
487 |(% style="width:101px" %)(((
488 AT+EXT=4,2
489 )))|(% style="width:373px" %)(((
490 Sent uplink packet only in falling interrupt
491 )))
492 |(% style="width:101px" %)(((
493 AT+EXT=4,3
494 )))|(% style="width:373px" %)(((
495 Sent uplink packet only in rising interrupt
496 )))
497
498 Trigger by falling edge:
499
500 [[image:image-20220906101145-2.png]]
501
502
503 Trigger by raising edge：
504
505 [[image:image-20220906101145-3.png]]
506
507
508
509 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
510
511
512 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
513
514
515 (% 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.
516
517 [[image:image-20220906101320-4.png||height="366" width="698"]]
518
519
520 (% 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
521
522 [[image:image-20220906101320-5.png||height="353" width="696"]]
523
524
525 Ext=8, Counting Sensor ( 4 bytes)：
526
527 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
528 |(% style="width:138px" %)(((
529 AT+EXT=8,0
530 )))|(% style="width:240px" %)(((
531 Count at falling interrupt
532 )))
533 |(% style="width:138px" %)(((
534 AT+EXT=8,1
535 )))|(% style="width:240px" %)(((
536 Count at rising interrupt
537 )))
538 |(% style="width:138px" %)(((
539 AT+SETCNT=60
540 )))|(% style="width:240px" %)(((
541 Sent current count to 60
542 )))
543
544 [[image:image-20220906101320-6.png]]
545
546
547 (% style="color:blue" %)**A2 downlink Command：**
548
549 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
550
551 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
552
553 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
554
555 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
556
557 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)
558
559
560
561 == 2.5 Show data on Datacake ==
562
563
564 (((
565 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:
566 )))
567
568 (((
569
570 )))
571
572 (((
573 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
574 )))
575
576 (((
577 (% 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.
578 )))
579
580 (((
581
582 )))
583
584 (((
585 Add Datacake:
586 )))
587
588
589 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
590
591
592
593 Select default key as Access Key:
594
595
596 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
597
598
599 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
600
601
602 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
603
604
605 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
606
607
608
609 == 2.6 Datalog Feature ==
610
611
612 (((
613 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.
614 )))
615
616
617
618 === 2.6.1 Ways to get datalog via LoRaWAN ===
619
620
621 There are two methods:
622
623 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
624
625
626 (% 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.
627
628
629 (% style="color:red" %)**Note for method 2:**
630
631 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
632 * 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.
633
634 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
635
636
637 [[image:image-20220703111700-2.png||height="381" width="1119"]]
638
639
640
641 === 2.6.2 Unix TimeStamp ===
642
643
644 LHT65N uses Unix TimeStamp format based on
645
646
647 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
648
649
650
651 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
652
653 Below is the converter example
654
655 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
656
657 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
658
659
660
661 === 2.6.3 Set Device Time ===
662
663
664 (((
665 (% style="color:blue" %)**There are two ways to set device's time:**
666 )))
667
668 (((
669 **1.  Through LoRaWAN MAC Command (Default settings)**
670 )))
671
672 (((
673 User need to set SYNCMOD=1 to enable sync time via MAC command.
674 )))
675
676 (((
677 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).
678 )))
679
680 (((
681 (% 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.**
682 )))
683
684
685
686 (((
687 **2. Manually Set Time**
688 )))
689
690 (((
691 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
692 )))
693
694
695
696 === 2.6.4 Poll sensor value ===
697
698
699 User can poll sensor value based on timestamps from the server. Below is the downlink command.
700
701 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
702
703
704 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.
705
706 For example, downlink command **31 5FC5F350 5FC6 0160 05**
707
708 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
709
710 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
711
712
713
714 === 2.6.5 Datalog Uplink payload ===
715
716
717 The Datalog poll reply uplink will use below payload format.
718
719 **Retrieval data payload:**
720
721 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
722 |=(% style="width: 60px;" %)(((
723 **Size(bytes)**
724 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
725 |(% 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"]]
726
727 **Poll message flag & Ext:**
728
729 [[image:image-20221006192726-1.png||height="112" width="754"]]
730
731 (% 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)
732
733 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
734
735 * Poll Message Flag is set to 1.
736
737 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
738
739 For example, in US915 band, the max payload for different DR is:
740
741 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
742
743 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
744
745 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
746
747 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
748
749 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
750
751
752 **Example:**
753
754 If LHT65N has below data inside Flash:
755
756 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
757
758
759 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
760
761 Where : Start time: 60065F97 = time 21/1/19 04:27:03
762
763 Stop time: 60066DA7= time 21/1/19 05:27:03
764
765
766 **LHT65N will uplink this payload.**
767
768 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
769
770
771 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
772
773 Where the first 11 bytes is for the first entry:
774
775 7FFF089801464160065F97
776
777 Ext sensor data=0x7FFF/100=327.67
778
779 Temp=0x088E/100=22.00
780
781 Hum=0x014B/10=32.6
782
783 poll message flag & Ext=0x41,means reply data,Ext=1
784
785 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
786
787
788
789 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
790
791
792 (((
793 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.
794 )))
795
796 (((
797 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
798
799
800
801 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
802
803
804 **Internal GXHT30 temperature alarm**
805
806 (((
807 (% class="box infomessage" %)
808 (((
809 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
810
811 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
812
813 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
814
815 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
816
817 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
818
819 **AT+LEDALARM=1** :       Enable LED visual Alarm.
820 )))
821 )))
822
823 (% style="color:#4f81bd" %)**Downlink Command:**
824
825 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
826
827 AT+CITEMP=1 : A60001
828
829 AT+ARTEMP=1,60  :  A70001003C
830
831 AT+ARTEMP=-16,60 :  A7FFF0003C
832
833 AT+LEDALARM=1  :  3601
834
835
836 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
837
838 Total bytes: 8 bytes
839
840 **Example: **AA0100010001003C
841
842 WMOD=01
843
844 CITEMP=0001
845
846 TEMPlow=0001
847
848 TEMPhigh=003C
849
850
851 **DS18B20 and TMP117 Threshold Alarm**
852
853 **~ AT+WMOD=1,60,-10,20**
854
855 (% style="color:#4f81bd" %)**Downlink Command:**
856
857 **Example: **A5013CFC180014
858
859 MOD=01
860
861 CITEMP=3C(S)
862
863 TEMPlow=FC18
864
865 TEMPhigh=0014
866
867
868 **Fluctuation alarm for DS18B20 and TMP117**
869
870 **AT+WMOD=2,60,5** 
871
872 (% style="color:#4f81bd" %)**Downlink Command:**
873
874 **Example: **A5023C05
875
876 MOD=02
877
878 CITEMP=3C(S)
879
880 temperature fluctuation=05
881
882
883 ==== **Sampling multiple times and uplink together** ====
884
885 **AT+WMOD=3,1,60,20,-16,32,1**  ~/~/ Mode 3, the collection interval is 60s, the total number of collection is 20 times, and the data of these 20 times will be sent to the 20th time, with a maximum of 60 groups, the normal working temperature range is -16 to 32°C, 1 is to open the temperature alarm, 0 is to close the temperature alarm, and the temperature is turned on. After the alarm, if the temperature collected at the current time exceeds the normal working temperature, a data will be sent immediately.
886
887 (% style="color:#4f81bd" %)**Downlink Command:**
888
889 **Example: **A50301003C14FFF0002001
890
891 MOD=03
892
893 EXT=01
894
895 CITEMP=003C(S)
896
897 Total number of acquisitions=14
898
899 TEMPlow=FFF0
900
901 TEMPhigh=0020
902
903 ARTEMP=01
904
905
906 **Uplink payload( Fport=3)**
907
908 **Example: **CBEA0109920A4109C4
909
910 BatV=CBEA
911
912 EXT=01
913
914 Temp1=0992  ~/~/ 24.50℃
915
916 Temp2=0A41  ~/~/ 26.25℃
917
918 Temp3=09C4  ~/~/ 25.00℃
919
920
921 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
922
923 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
924 )))
925
926
927 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
928
929
930 (% _mstvisible="1" class="box infomessage" %)
931 (((
932 (((
933 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
934 )))
935
936 (((
937 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
938 )))
939
940 (((
941 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
942 )))
943
944 (((
945 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
946 )))
947
948 (((
949 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
950 )))
951 )))
952
953 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
954
955 Total bytes: 8 bytes
956
957 **Example:**AA0100010001003C
958
959 WMOD=01
960
961 CITEMP=0001
962
963 TEMPlow=0001
964
965 TEMPhigh=003C
966
967
968
969 == 2.8 LED Indicator ==
970
971
972 The LHT65 has a triple color LED which for easy showing different stage .
973
974 While user press ACT button, the LED will work as per LED status with ACT button.
975
976 In a normal working state:
977
978 * For each uplink, the BLUE LED or RED LED will blink once.
979 BLUE LED when external sensor is connected.
980 * RED LED when external sensor is not connected
981 * For each success downlink, the PURPLE LED will blink once
982
983 == 2.9 installation ==
984
985
986 (% _mstvisible="1" %)
987 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
988
989
990
991 = 3. Sensors and Accessories =
992
993
994 == 3.1 E2 Extension Cable ==
995
996
997 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
998
999
1000 **1m long breakout cable for LHT65N. Features:**
1001
1002 * (((
1003 Use for AT Command， works for both LHT52/LHT65N
1004 )))
1005 * (((
1006 Update firmware for LHT65N, works for both LHT52/LHT65N
1007 )))
1008 * (((
1009 Supports ADC mode to monitor external ADC
1010 )))
1011 * (((
1012 Supports Interrupt mode
1013 )))
1014 * (((
1015 Exposed All pins from the LHT65N Type-C connector.
1016
1017
1018
1019 )))
1020
1021 [[image:image-20220619092421-3.png||height="371" width="529"]]
1022
1023
1024
1025
1026 == 3.2 E3 Temperature Probe ==
1027
1028
1029 [[image:image-20220515080154-4.png||_mstalt="434681" _mstvisible="3" alt="photo-20220515080154-4.png" height="182" width="161"]] [[image:image-20220515080330-5.png||_mstalt="428792" _mstvisible="3" height="201" width="195"]]
1030
1031
1032 Temperature sensor with 2 meters cable long
1033
1034 * Resolution: 0.0625 °C
1035 * ±0.5°C accuracy from -10°C to +85°C
1036 * ±2°C accuracy from -55°C to +125°C
1037 * Operating Range: -40 ~~ 125 °C
1038 * Working voltage 2.35v ~~ 5v
1039
1040
1041 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1042
1043
1044 (((
1045 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1046 )))
1047
1048 * (((
1049 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1050 )))
1051
1052 * (((
1053 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1054 )))
1055
1056 (((
1057 There are two kinds of commands to configure LHT65N, they are:
1058 )))
1059
1060 * (((
1061 (% style="color:#4f81bd" %)**General Commands**.
1062 )))
1063
1064 (((
1065 These commands are to configure:
1066 )))
1067
1068 1. (((
1069 General system settings like: uplink interval.
1070 )))
1071 1. (((
1072 LoRaWAN protocol & radio-related commands.
1073 )))
1074
1075 (((
1076 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]]
1077 )))
1078
1079 * (((
1080 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1081 )))
1082
1083 (((
1084 These commands are only valid for LHT65N, as below:
1085 )))
1086
1087
1088
1089 == 4.1 Set Transmit Interval Time ==
1090
1091
1092 Feature: Change LoRaWAN End Node Transmit Interval.
1093
1094
1095 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1096
1097 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1098
1099
1100 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1101
1102 Format: Command Code (0x01) followed by 3 bytes time value.
1103
1104 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1105
1106 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1107
1108 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1109
1110
1111 == 4.2 Set External Sensor Mode ==
1112
1113
1114 Feature: Change External Sensor Mode.
1115
1116
1117 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1118
1119 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1120
1121
1122 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1123
1124 Total bytes: 2 ~~ 5 bytes
1125
1126 **Example:**
1127
1128 * 0xA201: Set external sensor type to E1
1129
1130 * 0xA209: Same as AT+EXT=9
1131
1132 * 0xA20702003c: Same as AT+SETCNT=60
1133
1134
1135 == 4.3 Enable/Disable uplink Temperature probe ID ==
1136
1137
1138 (((
1139 Feature: If PID is enabled, device will send the temperature probe ID on:
1140 )))
1141
1142 * (((
1143 First Packet after OTAA Join
1144 )))
1145 * (((
1146 Every 24 hours since the first packet.
1147 )))
1148
1149 (((
1150 PID is default set to disable (0)
1151
1152
1153 )))
1154
1155 (% style="color:#4f81bd" %)**AT Command:**
1156
1157 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1158
1159
1160 (% style="color:#4f81bd" %)**Downlink Command:**
1161
1162 * **0xA800**  **~-~->** AT+PID=0
1163 * **0xA801**     **~-~->** AT+PID=1
1164
1165
1166 == 4.4 Set Password ==
1167
1168
1169 Feature: Set device password, max 9 digits
1170
1171
1172 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1173
1174 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1175
1176
1177 (% style="color:#4f81bd" %)**Downlink Command:**
1178
1179 No downlink command for this feature.
1180
1181
1182
1183 == 4.5 Quit AT Command ==
1184
1185
1186 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1187
1188
1189 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1190
1191 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1192
1193
1194 (% style="color:#4f81bd" %)**Downlink Command:**
1195
1196 No downlink command for this feature.
1197
1198
1199
1200 == 4.6 Set to sleep mode ==
1201
1202
1203 Feature: Set device to sleep mode
1204
1205 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1206 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1207
1208 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1209
1210 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1211
1212
1213 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1214
1215 * There is no downlink command to set to Sleep mode.
1216
1217
1218 == 4.7 Set system time ==
1219
1220
1221 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1222
1223
1224 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1225
1226 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1227
1228
1229 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1230
1231 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1232
1233
1234
1235 == 4.8 Set Time Sync Mode ==
1236
1237
1238 (((
1239 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1240 )))
1241
1242 (((
1243 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.
1244
1245
1246 )))
1247
1248 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1249
1250 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1251
1252
1253 (% style="color:#4f81bd" %)**Downlink Command:**
1254
1255 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1256 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1257
1258
1259
1260 == 4.9 Set Time Sync Interval ==
1261
1262
1263 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1264
1265
1266 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1267
1268 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1269
1270
1271 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1272
1273 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1274
1275
1276
1277 == 4.10 Print data entries base on page. ==
1278
1279
1280 Feature: Print the sector data from start page to stop page (max is 416 pages).
1281
1282
1283 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1284
1285 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1286
1287
1288 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1289
1290 No downlink commands for feature
1291
1292
1293
1294 == 4.11 Print last few data entries. ==
1295
1296
1297 Feature: Print the last few data entries
1298
1299
1300 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1301
1302 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1303
1304
1305 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1306
1307 No downlink commands for feature
1308
1309
1310
1311 == 4.12 Clear Flash Record ==
1312
1313
1314 Feature: Clear flash storage for data log feature.
1315
1316
1317 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1318
1319 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1320
1321
1322 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1323
1324 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1325
1326
1327 == 4.13 Auto Send None-ACK messages ==
1328
1329
1330 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.
1331
1332
1333 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1334
1335 The default factory setting is 0
1336
1337 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1338 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1339 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1340
1341 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1342
1343 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1344
1345
1346 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1347
1348
1349 Feature: Set internal and external temperature sensor alarms.
1350
1351 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1352 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1353 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1354
1355 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1356
1357 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1358
1359 0): Cancel
1360
1361 1): Threshold alarm
1362
1363 2): Fluctuation alarm
1364
1365
1366 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1367
1368 (% 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.**
1369
1370
1371 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1372
1373 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1374
1375 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1376
1377
1378 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.
1379
1380 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1381
1382 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1383
1384
1385 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1386
1387 0xA5 00 ~-~- AT+WMOD=0.
1388
1389 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 )
1390
1391 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))
1392
1393 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1394
1395 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.
1396
1397
1398
1399 = 5. Battery & How to replace =
1400
1401
1402 == 5.1 Battery Type ==
1403
1404
1405
1406 (((
1407 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.
1408 )))
1409
1410
1411
1412 (((
1413 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1414 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1415 )))
1416
1417 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1418
1419
1420
1421 == 5.2 Replace Battery ==
1422
1423
1424 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.
1425
1426 [[image:image-20220515075440-2.png||_mstalt="429546" _mstvisible="3" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" _mstvisible="3" height="193" width="257"]]
1427
1428
1429
1430 == 5.3 Battery Life Analyze ==
1431
1432
1433 (((
1434 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:
1435 [[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]]
1436 )))
1437
1438
1439 (((
1440 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]]
1441 )))
1442
1443
1444
1445 = 6. FAQ =
1446
1447
1448 == 6.1 How to use AT Command? ==
1449
1450
1451 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.
1452
1453 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1454
1455
1456 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1457
1458 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1459 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1460 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1461
1462 (((
1463 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.
1464 )))
1465
1466
1467 Input password and ATZ to activate LHT65N,As shown below:
1468
1469 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1470
1471
1472 (% _msthash="506066" _msttexthash="544869" %)
1473 AT Command List is as below:
1474
1475 (% _msthash="506067" _msttexthash="361920" %)
1476 AT+<CMD>? :  Help on <CMD>
1477
1478 (% _msthash="506068" _msttexthash="243061" %)
1479 AT+<CMD> :  Run <CMD>
1480
1481 (% _msthash="506069" _msttexthash="704197" %)
1482 AT+<CMD>=<value> :  Set the value
1483
1484 (% _msthash="506070" _msttexthash="455676" %)
1485 AT+<CMD>=? :  Get the value
1486
1487 (% _msthash="506071" _msttexthash="670553" %)
1488 AT+DEBUG:  Set more info output
1489
1490 (% _msthash="506072" _msttexthash="485888" %)
1491 ATZ:  Trig a reset of the MCU
1492
1493 (% _msthash="506073" _msttexthash="2068872" %)
1494 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1495
1496 (% _msthash="506074" _msttexthash="689169" %)
1497 AT+DEUI:  Get or Set the Device EUI
1498
1499 (% _msthash="506075" _msttexthash="960414" %)
1500 AT+DADDR:  Get or Set the Device Address
1501
1502 (% _msthash="506076" _msttexthash="1079897" %)
1503 AT+APPKEY:  Get or Set the Application Key
1504
1505 (% _msthash="506077" _msttexthash="1326143" %)
1506 AT+NWKSKEY:  Get or Set the Network Session Key
1507
1508 (% _msthash="506078" _msttexthash="1573000" %)
1509 AT+APPSKEY:  Get or Set the Application Session Key
1510
1511 (% _msthash="506079" _msttexthash="1041729" %)
1512 AT+APPEUI:  Get or Set the Application EUI
1513
1514 (% _msthash="506080" _msttexthash="2104206" %)
1515 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1516
1517 (% _msthash="506081" _msttexthash="3369288" %)
1518 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1519
1520 (% _msthash="506082" _msttexthash="1894529" %)
1521 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1522
1523 (% _msthash="506083" _msttexthash="3864172" %)
1524 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1525
1526 (% _msthash="506084" _msttexthash="1712204" %)
1527 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1528
1529 (% _msthash="506085" _msttexthash="1281202" %)
1530 AT+RX2FQ:  Get or Set the Rx2 window frequency
1531
1532 (% _msthash="506086" _msttexthash="2796781" %)
1533 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1534
1535 (% _msthash="506087" _msttexthash="3285165" %)
1536 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1537
1538 (% _msthash="506088" _msttexthash="3286179" %)
1539 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1540
1541 (% _msthash="506089" _msttexthash="4703803" %)
1542 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1543
1544 (% _msthash="506090" _msttexthash="4704999" %)
1545 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1546
1547 (% _msthash="506091" _msttexthash="1528683" %)
1548 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1549
1550 (% _msthash="506092" _msttexthash="757185" %)
1551 AT+NWKID:  Get or Set the Network ID
1552
1553 (% _msthash="506093" _msttexthash="1156597" %)
1554 AT+FCU:  Get or Set the Frame Counter Uplink
1555
1556 (% _msthash="506094" _msttexthash="1273987" %)
1557 AT+FCD:  Get or Set the Frame Counter Downlink
1558
1559 (% _msthash="506095" _msttexthash="859222" %)
1560 AT+CLASS:  Get or Set the Device Class
1561
1562 (% _msthash="506096" _msttexthash="384852" %)
1563 AT+JOIN:  Join network
1564
1565 (% _msthash="506097" _msttexthash="548626" %)
1566 AT+NJS:  Get the join status
1567
1568 (% _msthash="506098" _msttexthash="2546206" %)
1569 AT+SENDB:  Send hexadecimal data along with the application port
1570
1571 (% _msthash="506099" _msttexthash="1932307" %)
1572 AT+SEND:  Send text data along with the application port
1573
1574 (% _msthash="506100" _msttexthash="3560557" %)
1575 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1576
1577 (% _msthash="506101" _msttexthash="1429701" %)
1578 AT+RECV:  Print last received data in raw format
1579
1580 (% _msthash="506102" _msttexthash="1735981" %)
1581 AT+VER:  Get current image version and Frequency Band
1582
1583 (% _msthash="506103" _msttexthash="1189474" %)
1584 AT+CFM:  Get or Set the confirmation mode (0-1)
1585
1586 (% _msthash="506104" _msttexthash="1718210" %)
1587 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1588
1589 (% _msthash="506105" _msttexthash="1339403" %)
1590 AT+SNR:  Get the SNR of the last received packet
1591
1592 (% _msthash="506106" _msttexthash="1452009" %)
1593 AT+RSSI:  Get the RSSI of the last received packet
1594
1595 (% _msthash="506107" _msttexthash="2768142" %)
1596 AT+TDC:  Get or set the application data transmission interval in ms
1597
1598 (% _msthash="506108" _msttexthash="1083914" %)
1599 AT+PORT:  Get or set the application port
1600
1601 (% _msthash="506109" _msttexthash="622440" %)
1602 AT+DISAT:  Disable AT commands
1603
1604 (% _msthash="506110" _msttexthash="868361" %)
1605 AT+PWORD: Set password, max 9 digits
1606
1607 (% _msthash="506111" _msttexthash="2210299" %)
1608 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1609
1610 (% _msthash="506112" _msttexthash="2113462" %)
1611 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1612
1613 (% _msthash="506113" _msttexthash="2087423" %)
1614 AT+PDTA:  Print the sector data from start page to stop page
1615
1616 (% _msthash="506114" _msttexthash="1063127" %)
1617 AT+PLDTA:  Print the last few sets of data
1618
1619 (% _msthash="506115" _msttexthash="1999426" %)
1620 AT+CLRDTA:  Clear the storage, record position back to 1st
1621
1622 (% _msthash="506116" _msttexthash="442130" %)
1623 AT+SLEEP:  Set sleep mode
1624
1625 (% _msthash="506117" _msttexthash="1080222" %)
1626 AT+EXT:  Get or Set external sensor model
1627
1628 (% _msthash="506118" _msttexthash="1309490" %)
1629 AT+BAT:  Get the current battery voltage in mV
1630
1631 (% _msthash="506119" _msttexthash="813891" %)
1632 AT+CFG:  Print all configurations
1633
1634 (% _msthash="506120" _msttexthash="551707" %)
1635 AT+WMOD:  Get or Set Work Mode
1636
1637 (% _msthash="506121" _msttexthash="2631499" %)
1638 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1639
1640 (% _msthash="506122" _msttexthash="3907150" %)
1641 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1642
1643 (% _msthash="506123" _msttexthash="854620" %)
1644 AT+SETCNT:  Set the count at present
1645
1646 (% _msthash="506124" _msttexthash="2554877" %)
1647 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1648
1649 (% _msthash="506125" _msttexthash="771849" %)
1650 AT+RPL:  Get or set response level
1651
1652 (% _msthash="506126" _msttexthash="1484314" %)
1653 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1654
1655 (% _msthash="506127" _msttexthash="741728" %)
1656 AT+LEAPSEC:  Get or Set Leap Second
1657
1658 (% _msthash="506128" _msttexthash="1694017" %)
1659 AT+SYNCMOD:  Get or Set time synchronization method
1660
1661 (% _msthash="506129" _msttexthash="2235948" %)
1662 AT+SYNCTDC:  Get or set time synchronization interval in day
1663
1664 (% _msthash="506130" _msttexthash="425542" %)
1665 AT+PID:  Get or set the PID
1666
1667
1668
1669 == 6.2 Where to use AT commands and Downlink commands ==
1670
1671
1672 **AT commands：**
1673
1674 [[image:image-20220620153708-1.png||height="603" width="723"]]
1675
1676
1677 **Downlink commands:**
1678
1679
1680
1681 (% style="color:blue" %)**TTN:**
1682
1683 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1684
1685
1686
1687 (% style="color:blue" %)**Helium：**
1688
1689 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1690
1691
1692
1693 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1694
1695
1696 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1697
1698
1699 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1700
1701
1702
1703 (% style="color:blue" %)**Aws:**
1704
1705 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1706
1707
1708
1709 == 6.3 How to change the uplink interval？ ==
1710
1711
1712 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/||_msthash="506137" _msttexthash="5712018" style="background-color: rgb(255, 255, 255);"]]
1713
1714
1715
1716 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1717
1718
1719 [[image:image-20220615153355-1.png]]
1720
1721 [[image:1655802313617-381.png]]
1722
1723
1724 (((
1725 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.
1726 )))
1727
1728
1729 Input password and ATZ to activate LHT65N,As shown below:
1730
1731 [[image:image-20220615154519-3.png||height="672" width="807"]]
1732
1733
1734
1735 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1736
1737
1738 [[image:image-20220615153355-1.png]]
1739
1740
1741 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1742
1743 [[image:image-20220615170542-5.png]]
1744
1745
1746
1747 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1748
1749 (% _msthash="506146" _msttexthash="52173160" %)
1750 First connect the four lines；(% style="display:none" %)
1751
1752 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1753
1754
1755 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1756
1757 [[image:image-20220621170938-2.png]]
1758
1759
1760
1761 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1762
1763 [[image:image-20220615171334-6.png]]
1764
1765
1766 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1767
1768
1769 When this interface appears, it indicates that the download has been completed.
1770
1771 [[image:image-20220620160723-8.png]]
1772
1773
1774 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1775
1776
1777
1778 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1779
1780
1781 [[image:image-20220623110706-1.png]]
1782
1783
1784 [[image:image-20220623112117-4.png||height="459" width="343"]]
1785
1786
1787 (((
1788 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.
1789 )))
1790
1791
1792 Input password and ATZ to activate LHT65N,As shown below:
1793
1794 [[image:image-20220615154519-3.png||height="672" width="807"]]
1795
1796
1797
1798 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1799
1800
1801 [[image:image-20220623110706-1.png]]
1802
1803
1804 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1805
1806 [[image:image-20220615170542-5.png]]
1807
1808
1809
1810 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1811
1812 (% _msthash="506146" _msttexthash="52173160" %)
1813 First connect the four lines；
1814
1815 (% _msthash="506146" _msttexthash="52173160" %)
1816 [[image:image-20220623113959-5.png||height="528" width="397"]]
1817
1818 (% _msthash="506146" _msttexthash="52173160" %)
1819 Connect A5 and GND with Dupont wire for a while and then separate
1820
1821
1822
1823 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1824
1825 [[image:image-20220615171334-6.png]]
1826
1827
1828 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1829
1830
1831 When this interface appears, it indicates that the download has been completed.
1832
1833 [[image:image-20220620160723-8.png]]
1834
1835
1836 Finally,restart reset device again
1837
1838
1839
1840 = 7. Order Info =
1841
1842
1843 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1844
1845 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1846
1847 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1848 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1849 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1850 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1851 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1852 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1853 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1854 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1855
1856 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1857
1858 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1859
1860
1861 = 8. Packing Info =
1862
1863
1864 **Package Includes**:
1865
1866 * LHT65N Temperature & Humidity Sensor x 1
1867 * Optional external sensor
1868
1869 **Dimension and weight**:
1870
1871 * Device Size:  10 x 10 x 3.5 cm
1872 * Device Weight: 120.5g
1873
1874
1875 = 9. Reference material =
1876
1877
1878 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1879
1880
1881 = 10. FCC Warning =
1882
1883
1884 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1885
1886 (1) This device may not cause harmful interference；
1887
1888 (2) this device must accept any interference received, including interference that may cause undesired operation.
1889
1890
1891

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