Version 222.2 by Xiaoling on 2022/11/21 11:51
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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 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
20
21
22 (((
23 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.**
24 )))
25
26 (((
27 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.
28 )))
29
30 (((
31 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
32 )))
33
34 (((
35 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
36 )))
37
38 (((
39 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.
40 )))
41
42 (((
43 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
44 )))
45
46
47
48 == 1.2 Features ==
49
50
51 * Wall mountable
52 * LoRaWAN v1.0.3 Class A protocol
53 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
54 * AT Commands to change parameters
55 * Remote configure parameters via LoRaWAN Downlink
56 * Firmware upgradeable via program port
57 * Built-in 2400mAh battery for up to 10 years of use.
58 * Built-in Temperature & Humidity sensor
59 * Optional External Sensors
60 * Tri-color LED to indicate working status
61 * Datalog feature (Max 3328 records)
62
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
91 = 2. Connect LHT65N to IoT Server =
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 == 2.2 How to Activate LHT65N? ==
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107
108 (((
109 The LHT65N has two working modes:
110 )))
111
112 * (((
113 (% 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.
114 )))
115 * (((
116 (% 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. 
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118
119 (((
120 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
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122
123
124 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
125
126 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
127
128
129 == 2.3 Example to join LoRaWAN network ==
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132 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
133 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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136 (% _mstvisible="1" class="wikigeneratedid" %)
137 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
138
139
140 (((
141 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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143
144
145
146 === 2.3.1 Step 1: Create Device n TTN ===
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148
149 (((
150 Create a device in TTN V3 with the OTAA keys from LHT65N.
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152
153 (((
154 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
155 )))
156
157 [[image:image-20220617150003-1.jpeg]]
158
159 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
160
161 Add APP EUI in the application.
162
163
164 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
165
166
167 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
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170 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
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173
174 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
175
176
177 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
178
179
180 Input APP EUI,  APP KEY and DEV EUI:
181
182
183 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
184
185
186
187 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
188
189
190 (((
191 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.
192 )))
193
194 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
195
196
197 == 2.4 Uplink Payload   ( Fport~=2) ==
198
199
200 (((
201 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.
202 )))
203
204 (((
205 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
206 )))
207
208 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
209 |=(% style="width: 60px;" %)(((
210 **Size(bytes)**
211 )))|=(% style="width: 30px;" %)(((
212 **2**
213 )))|=(% style="width: 100px;" %)(((
214 **2**
215 )))|=(% style="width: 100px;" %)(((
216 **2**
217 )))|=(% style="width: 50px;" %)(((
218 **1**
219 )))|=(% style="width: 50px;" %)(((
220 **4**
221 )))
222 |(% style="width:97px" %)(((
223 **Value**
224 )))|(% style="width:39px" %)(((
225 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
226 )))|(% style="width:100px" %)(((
227 (((
228 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
229 )))
230 )))|(% style="width:77px" %)(((
231 (((
232 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
233 )))
234 )))|(% style="width:47px" %)(((
235 [[Ext>>||anchor="H2.4.5Ext23"]] #
236 )))|(% style="width:51px" %)(((
237 [[Ext value>>||anchor="H2.4.6Extvalue"]]
238 )))
239
240 * The First 6 bytes: has fix meanings for every LHT65N.
241 * The 7th byte (EXT #): defines the external sensor model.
242 * 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.)
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244
245
246 === 2.4.1 Decoder in TTN V3 ===
247
248
249 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.
250
251 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]]
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253
254 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
255
256
257
258 === 2.4.2 BAT-Battery Info ===
259
260
261 These two bytes of BAT include the battery state and the actually voltage
262
263 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
264
265
266 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
267
268
269 Check the battery voltage for LHT65N.
270
271 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
272 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
273
274
275
276 === 2.4.3 Built-in Temperature ===
277
278
279 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
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281 * Temperature:  0x0ABB/100=27.47℃
282
283 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
284
285 * Temperature:  (0xF5C6-65536)/100=-26.18℃
286
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
298 === 2.4.5 Ext # ===
299
300
301 Bytes for External Sensor:
302
303 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
304
305
306 === 2.4.6 Ext value ===
307
308 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
309
310
311 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
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313
314 * DS18B20 temp=0x0ADD/100=27.81℃
315
316 The last 2 bytes of data are meaningless
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318
319
320 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
321
322
323 * External temperature= (0xF54F-65536)/100=-27.37℃
324
325 The last 2 bytes of data are meaningless
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327 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
328
329
330
331 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
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333
334 (((
335 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:
336 )))
337
338 (((
339
340 )))
341
342 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
343 |=(% style="width: 50px;" %)(((
344 **Size(bytes)**
345 )))|=(% style="width: 70px;" %)(((
346 **2**
347 )))|=(% style="width: 120px;" %)(((
348 **2**
349 )))|=(% style="width: 120px;" %)(((
350 **2**
351 )))|=(% style="width: 50px;" %)(((
352 **1**
353 )))|=(% style="width: 70px;" %)(((
354 **4**
355 )))
356 |(% style="width:110px" %)(((
357 **Value**
358 )))|(% style="width:71px" %)(((
359 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
360 )))|(% style="width:99px" %)(((
361 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
362 )))|(% style="width:132px" %)(((
363 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
364 )))|(% style="width:54px" %)(((
365 Status & Ext
366 )))|(% style="width:64px" %)(((
367 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
368 )))
369
370 * **Battery status & Built-in Humidity**
371
372 (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
373 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
374 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
375 BAT Status
376 00(b): Ultra Low ( BAT <= 2.50v)
377 01(b): Low  (2.50v <=BAT <= 2.55v)
378 10(b): OK   (2.55v <= BAT <=2.65v)
379 11(b): Good   (BAT >= 2.65v)
380 )))|(% style="width:132px" %)(((
381 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
382 )))
383
384 * **Status & Ext Byte**
385
386 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
387 |=(% 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]**
388 |=(% 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)
389
390 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
391 * (% 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.
392 * (% 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)
393
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.
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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
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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
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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 == 2.6 Datalog Feature ==
609
610
611 (((
612 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.
613 )))
614
615
616 === 2.6.1 Ways to get datalog via LoRaWAN ===
617
618
619 There are two methods:
620
621 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
622
623
624 (% 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.
625
626
627 (% style="color:red" %)**Note for method 2:**
628
629 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
630 * 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.
631
632 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
633
634
635 [[image:image-20220703111700-2.png||height="381" width="1119"]]
636
637
638 === 2.6.2 Unix TimeStamp ===
639
640
641 LHT65N uses Unix TimeStamp format based on
642
643
644 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
645
646
647
648 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
649
650 Below is the converter example
651
652 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
653
654
655 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
656
657
658 === 2.6.3 Set Device Time ===
659
660
661 (((
662 (% style="color:blue" %)**There are two ways to set device's time:**
663 )))
664
665 (((
666 **1.  Through LoRaWAN MAC Command (Default settings)**
667 )))
668
669 (((
670 User need to set SYNCMOD=1 to enable sync time via MAC command.
671 )))
672
673 (((
674 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).
675 )))
676
677 (((
678 (% 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.**
679 )))
680
681
682
683 (((
684 **2. Manually Set Time**
685 )))
686
687 (((
688 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
689 )))
690
691
692
693 === 2.6.4 Poll sensor value ===
694
695
696 User can poll sensor value based on timestamps from the server. Below is the downlink command.
697
698 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
699
700
701 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.
702
703 For example, downlink command **31 5FC5F350 5FC6 0160 05**
704
705 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
706
707 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
708
709
710
711 === 2.6.5 Datalog Uplink payload ===
712
713
714 The Datalog poll reply uplink will use below payload format.
715
716 **Retrieval data payload:**
717
718 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
719 |=(% style="width: 60px;" %)(((
720 **Size(bytes)**
721 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
722 |(% 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"]]
723
724 **Poll message flag & Ext:**
725
726 [[image:image-20221006192726-1.png||height="112" width="754"]]
727
728 (% 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)
729
730 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
731
732 * Poll Message Flag is set to 1.
733
734 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
735
736 For example, in US915 band, the max payload for different DR is:
737
738 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
739
740 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
741
742 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
743
744 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
745
746 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
747
748
749 **Example:**
750
751 If LHT65N has below data inside Flash:
752
753 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
754
755
756 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
757
758 Where : Start time: 60065F97 = time 21/1/19 04:27:03
759
760 Stop time: 60066DA7= time 21/1/19 05:27:03
761
762
763 **LHT65N will uplink this payload.**
764
765 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
766
767
768 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
769
770 Where the first 11 bytes is for the first entry:
771
772 7FFF089801464160065F97
773
774 Ext sensor data=0x7FFF/100=327.67
775
776 Temp=0x088E/100=22.00
777
778 Hum=0x014B/10=32.6
779
780 poll message flag & Ext=0x41,means reply data,Ext=1
781
782 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
783
784
785 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
786
787
788 (((
789 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.
790 )))
791
792 (((
793 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
794
795
796 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
797
798
799 **Internal GXHT30 temperature alarm**
800
801 (((
802 (% class="box infomessage" %)
803 (((
804 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
805
806 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
807
808 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
809
810 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
811
812 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
813
814 **AT+LEDALARM=1** :       Enable LED visual Alarm.
815 )))
816 )))
817
818 (% style="color:#4f81bd" %)**Downlink Command:**
819
820 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
821
822 AT+CITEMP=1 : A60001
823
824 AT+ARTEMP=1,60  :  A70001003C
825
826 AT+ARTEMP=-16,60 :  A7FFF0003C
827
828 AT+LEDALARM=1  :  3601
829
830
831 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
832
833 Total bytes: 8 bytes
834
835 **Example: **AA0100010001003C
836
837 WMOD=01
838
839 CITEMP=0001
840
841 TEMPlow=0001
842
843 TEMPhigh=003C
844
845
846 **DS18B20 and TMP117 Threshold Alarm**
847
848 **~ AT+WMOD=1,60,-10,20**
849
850 (% style="color:#4f81bd" %)**Downlink Command:**
851
852 **Example: **A5013CFC180014
853
854 MOD=01
855
856 CITEMP=3C(S)
857
858 TEMPlow=FC18
859
860 TEMPhigh=0014
861
862
863 **Fluctuation alarm for DS18B20 and TMP117**
864
865 **AT+WMOD=2,60,5** 
866
867 (% style="color:#4f81bd" %)**Downlink Command:**
868
869 **Example: **A5023C05
870
871 MOD=02
872
873 CITEMP=3C(S)
874
875 temperature fluctuation=05
876
877
878 ==== **Sampling multiple times and uplink together** ====
879
880 **AT+WMOD=3,1,60,20,-16,32,1**   
881
882 Explain:
883
884 * Set Working Mode to **Mode 3**
885 * Sampling Interval is **60**s.
886 * 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)
887 * Temperature alarm range is **-16** to **32**°C,
888 * **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.
889
890 (% style="color:#4f81bd" %)**Downlink Command:**
891
892 **Example: **A50301003C14FFF0002001
893
894 MOD=03
895
896 EXT=01
897
898 CITEMP=003C(S)
899
900 Total number of acquisitions=14
901
902 TEMPlow=FFF0
903
904 TEMPhigh=0020
905
906 ARTEMP=01
907
908
909 **Uplink payload( Fport=3)**
910
911 **Example: CBEA**01**0992**//0A41//**09C4**
912
913 BatV=CBEA
914
915 EXT=01
916
917 Temp1=0992  ~/~/ 24.50℃
918
919 Temp2=0A41  ~/~/ 26.25℃
920
921 Temp3=09C4  ~/~/ 25.00℃
922
923
924 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
925
926 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
927 )))
928
929
930 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
931
932
933 (% _mstvisible="1" class="box infomessage" %)
934 (((
935 (((
936 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
937 )))
938
939 (((
940 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
941 )))
942
943 (((
944 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
945 )))
946
947 (((
948 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
949 )))
950
951 (((
952 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
953 )))
954 )))
955
956 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
957
958 Total bytes: 8 bytes
959
960 **Example:**AA0100010001003C
961
962 WMOD=01
963
964 CITEMP=0001
965
966 TEMPlow=0001
967
968 TEMPhigh=003C
969
970
971 == 2.8 LED Indicator ==
972
973
974 The LHT65 has a triple color LED which for easy showing different stage .
975
976 While user press ACT button, the LED will work as per LED status with ACT button.
977
978 In a normal working state:
979
980 * For each uplink, the BLUE LED or RED LED will blink once.
981 BLUE LED when external sensor is connected.
982 * RED LED when external sensor is not connected
983 * For each success downlink, the PURPLE LED will blink once
984
985
986
987 == 2.9 installation ==
988
989
990 (% _mstvisible="1" %)
991 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
992
993
994
995 = 3. Sensors and Accessories =
996
997 == 3.1 E2 Extension Cable ==
998
999
1000 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
1001
1002
1003 **1m long breakout cable for LHT65N. Features:**
1004
1005 * (((
1006 Use for AT Command， works for both LHT52/LHT65N
1007 )))
1008 * (((
1009 Update firmware for LHT65N, works for both LHT52/LHT65N
1010 )))
1011 * (((
1012 Supports ADC mode to monitor external ADC
1013 )))
1014 * (((
1015 Supports Interrupt mode
1016 )))
1017 * (((
1018 Exposed All pins from the LHT65N Type-C connector.
1019
1020
1021
1022 )))
1023
1024 [[image:image-20220619092421-3.png||height="371" width="529"]]
1025
1026
1027 == 3.2 E3 Temperature Probe ==
1028
1029
1030 [[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"]]
1031
1032
1033 Temperature sensor with 2 meters cable long
1034
1035 * Resolution: 0.0625 °C
1036 * ±0.5°C accuracy from -10°C to +85°C
1037 * ±2°C accuracy from -55°C to +125°C
1038 * Operating Range: -40 ~~ 125 °C
1039 * Working voltage 2.35v ~~ 5v
1040
1041
1042
1043 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1044
1045
1046 (((
1047 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1048 )))
1049
1050 * (((
1051 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1052 )))
1053
1054 * (((
1055 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1056 )))
1057
1058 (((
1059 There are two kinds of commands to configure LHT65N, they are:
1060 )))
1061
1062 * (((
1063 (% style="color:#4f81bd" %)**General Commands**.
1064 )))
1065
1066 (((
1067 These commands are to configure:
1068 )))
1069
1070 1. (((
1071 General system settings like: uplink interval.
1072 )))
1073 1. (((
1074 LoRaWAN protocol & radio-related commands.
1075 )))
1076
1077 (((
1078 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]]
1079 )))
1080
1081 * (((
1082 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1083 )))
1084
1085 (((
1086 These commands are only valid for LHT65N, as below:
1087 )))
1088
1089
1090 == 4.1 Set Transmit Interval Time ==
1091
1092
1093 Feature: Change LoRaWAN End Node Transmit Interval.
1094
1095
1096 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1097
1098 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1099
1100
1101 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1102
1103 Format: Command Code (0x01) followed by 3 bytes time value.
1104
1105 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1106
1107 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1108
1109 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1110
1111
1112
1113 == 4.2 Set External Sensor Mode ==
1114
1115
1116 Feature: Change External Sensor Mode.
1117
1118
1119 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1120
1121 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1122
1123
1124 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1125
1126 Total bytes: 2 ~~ 5 bytes
1127
1128 **Example:**
1129
1130 * 0xA201: Set external sensor type to E1
1131
1132 * 0xA209: Same as AT+EXT=9
1133
1134 * 0xA20702003c: Same as AT+SETCNT=60
1135
1136
1137
1138 == 4.3 Enable/Disable uplink Temperature probe ID ==
1139
1140
1141 (((
1142 Feature: If PID is enabled, device will send the temperature probe ID on:
1143 )))
1144
1145 * (((
1146 First Packet after OTAA Join
1147 )))
1148 * (((
1149 Every 24 hours since the first packet.
1150 )))
1151
1152 (((
1153 PID is default set to disable (0)
1154
1155
1156 )))
1157
1158 (% style="color:#4f81bd" %)**AT Command:**
1159
1160 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1161
1162
1163 (% style="color:#4f81bd" %)**Downlink Command:**
1164
1165 * **0xA800**  **~-~->** AT+PID=0
1166 * **0xA801**     **~-~->** AT+PID=1
1167
1168
1169
1170 == 4.4 Set Password ==
1171
1172
1173 Feature: Set device password, max 9 digits
1174
1175
1176 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1177
1178 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1179
1180
1181 (% style="color:#4f81bd" %)**Downlink Command:**
1182
1183 No downlink command for this feature.
1184
1185
1186 == 4.5 Quit AT Command ==
1187
1188
1189 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1190
1191
1192 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1193
1194 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1195
1196
1197 (% style="color:#4f81bd" %)**Downlink Command:**
1198
1199 No downlink command for this feature.
1200
1201
1202 == 4.6 Set to sleep mode ==
1203
1204
1205 Feature: Set device to sleep mode
1206
1207 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1208 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1209
1210 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1211
1212 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1213
1214
1215 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1216
1217 * There is no downlink command to set to Sleep mode.
1218
1219
1220
1221 == 4.7 Set system time ==
1222
1223
1224 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1225
1226
1227 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1228
1229 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1230
1231
1232 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1233
1234 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1235
1236
1237 == 4.8 Set Time Sync Mode ==
1238
1239
1240 (((
1241 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1242 )))
1243
1244 (((
1245 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.
1246
1247
1248 )))
1249
1250 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1251
1252 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1253
1254
1255 (% style="color:#4f81bd" %)**Downlink Command:**
1256
1257 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1258 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1259
1260
1261 == 4.9 Set Time Sync Interval ==
1262
1263
1264 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1265
1266
1267 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1268
1269 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1270
1271
1272 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1273
1274 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
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 == 4.11 Print last few data entries. ==
1294
1295
1296 Feature: Print the last few data entries
1297
1298
1299 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1300
1301 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1302
1303
1304 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1305
1306 No downlink commands for feature
1307
1308
1309 == 4.12 Clear Flash Record ==
1310
1311
1312 Feature: Clear flash storage for data log feature.
1313
1314
1315 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1316
1317 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1318
1319
1320 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1321
1322 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1323
1324
1325
1326 == 4.13 Auto Send None-ACK messages ==
1327
1328
1329 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.
1330
1331
1332 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1333
1334 The default factory setting is 0
1335
1336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1337 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1338 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1339
1340 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1341
1342 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1343
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 = 5. Battery & How to replace =
1399
1400 == 5.1 Battery Type ==
1401
1402
1403 (((
1404 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.
1405 )))
1406
1407 (((
1408 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1409
1410
1411 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1412 )))
1413
1414 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1415
1416
1417 == 5.2 Replace Battery ==
1418
1419
1420 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.
1421
1422 [[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"]]
1423
1424
1425 == 5.3 Battery Life Analyze ==
1426
1427
1428 (((
1429 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:
1430 [[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]]
1431 )))
1432
1433
1434 (((
1435 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]]
1436 )))
1437
1438
1439 = 6. FAQ =
1440
1441 == 6.1 How to use AT Command? ==
1442
1443
1444 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.
1445
1446 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1447
1448
1449 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1450
1451 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1452 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1453 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1454
1455 (((
1456 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.
1457 )))
1458
1459
1460 Input password and ATZ to activate LHT65N,As shown below:
1461
1462 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1463
1464
1465 (% _msthash="506066" _msttexthash="544869" %)
1466 AT Command List is as below:
1467
1468 (% _msthash="506067" _msttexthash="361920" %)
1469 AT+<CMD>? :  Help on <CMD>
1470
1471 (% _msthash="506068" _msttexthash="243061" %)
1472 AT+<CMD> :  Run <CMD>
1473
1474 (% _msthash="506069" _msttexthash="704197" %)
1475 AT+<CMD>=<value> :  Set the value
1476
1477 (% _msthash="506070" _msttexthash="455676" %)
1478 AT+<CMD>=? :  Get the value
1479
1480 (% _msthash="506071" _msttexthash="670553" %)
1481 AT+DEBUG:  Set more info output
1482
1483 (% _msthash="506072" _msttexthash="485888" %)
1484 ATZ:  Trig a reset of the MCU
1485
1486 (% _msthash="506073" _msttexthash="2068872" %)
1487 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1488
1489 (% _msthash="506074" _msttexthash="689169" %)
1490 AT+DEUI:  Get or Set the Device EUI
1491
1492 (% _msthash="506075" _msttexthash="960414" %)
1493 AT+DADDR:  Get or Set the Device Address
1494
1495 (% _msthash="506076" _msttexthash="1079897" %)
1496 AT+APPKEY:  Get or Set the Application Key
1497
1498 (% _msthash="506077" _msttexthash="1326143" %)
1499 AT+NWKSKEY:  Get or Set the Network Session Key
1500
1501 (% _msthash="506078" _msttexthash="1573000" %)
1502 AT+APPSKEY:  Get or Set the Application Session Key
1503
1504 (% _msthash="506079" _msttexthash="1041729" %)
1505 AT+APPEUI:  Get or Set the Application EUI
1506
1507 (% _msthash="506080" _msttexthash="2104206" %)
1508 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1509
1510 (% _msthash="506081" _msttexthash="3369288" %)
1511 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1512
1513 (% _msthash="506082" _msttexthash="1894529" %)
1514 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1515
1516 (% _msthash="506083" _msttexthash="3864172" %)
1517 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1518
1519 (% _msthash="506084" _msttexthash="1712204" %)
1520 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1521
1522 (% _msthash="506085" _msttexthash="1281202" %)
1523 AT+RX2FQ:  Get or Set the Rx2 window frequency
1524
1525 (% _msthash="506086" _msttexthash="2796781" %)
1526 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1527
1528 (% _msthash="506087" _msttexthash="3285165" %)
1529 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1530
1531 (% _msthash="506088" _msttexthash="3286179" %)
1532 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1533
1534 (% _msthash="506089" _msttexthash="4703803" %)
1535 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1536
1537 (% _msthash="506090" _msttexthash="4704999" %)
1538 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1539
1540 (% _msthash="506091" _msttexthash="1528683" %)
1541 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1542
1543 (% _msthash="506092" _msttexthash="757185" %)
1544 AT+NWKID:  Get or Set the Network ID
1545
1546 (% _msthash="506093" _msttexthash="1156597" %)
1547 AT+FCU:  Get or Set the Frame Counter Uplink
1548
1549 (% _msthash="506094" _msttexthash="1273987" %)
1550 AT+FCD:  Get or Set the Frame Counter Downlink
1551
1552 (% _msthash="506095" _msttexthash="859222" %)
1553 AT+CLASS:  Get or Set the Device Class
1554
1555 (% _msthash="506096" _msttexthash="384852" %)
1556 AT+JOIN:  Join network
1557
1558 (% _msthash="506097" _msttexthash="548626" %)
1559 AT+NJS:  Get the join status
1560
1561 (% _msthash="506098" _msttexthash="2546206" %)
1562 AT+SENDB:  Send hexadecimal data along with the application port
1563
1564 (% _msthash="506099" _msttexthash="1932307" %)
1565 AT+SEND:  Send text data along with the application port
1566
1567 (% _msthash="506100" _msttexthash="3560557" %)
1568 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1569
1570 (% _msthash="506101" _msttexthash="1429701" %)
1571 AT+RECV:  Print last received data in raw format
1572
1573 (% _msthash="506102" _msttexthash="1735981" %)
1574 AT+VER:  Get current image version and Frequency Band
1575
1576 (% _msthash="506103" _msttexthash="1189474" %)
1577 AT+CFM:  Get or Set the confirmation mode (0-1)
1578
1579 (% _msthash="506104" _msttexthash="1718210" %)
1580 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1581
1582 (% _msthash="506105" _msttexthash="1339403" %)
1583 AT+SNR:  Get the SNR of the last received packet
1584
1585 (% _msthash="506106" _msttexthash="1452009" %)
1586 AT+RSSI:  Get the RSSI of the last received packet
1587
1588 (% _msthash="506107" _msttexthash="2768142" %)
1589 AT+TDC:  Get or set the application data transmission interval in ms
1590
1591 (% _msthash="506108" _msttexthash="1083914" %)
1592 AT+PORT:  Get or set the application port
1593
1594 (% _msthash="506109" _msttexthash="622440" %)
1595 AT+DISAT:  Disable AT commands
1596
1597 (% _msthash="506110" _msttexthash="868361" %)
1598 AT+PWORD: Set password, max 9 digits
1599
1600 (% _msthash="506111" _msttexthash="2210299" %)
1601 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1602
1603 (% _msthash="506112" _msttexthash="2113462" %)
1604 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1605
1606 (% _msthash="506113" _msttexthash="2087423" %)
1607 AT+PDTA:  Print the sector data from start page to stop page
1608
1609 (% _msthash="506114" _msttexthash="1063127" %)
1610 AT+PLDTA:  Print the last few sets of data
1611
1612 (% _msthash="506115" _msttexthash="1999426" %)
1613 AT+CLRDTA:  Clear the storage, record position back to 1st
1614
1615 (% _msthash="506116" _msttexthash="442130" %)
1616 AT+SLEEP:  Set sleep mode
1617
1618 (% _msthash="506117" _msttexthash="1080222" %)
1619 AT+EXT:  Get or Set external sensor model
1620
1621 (% _msthash="506118" _msttexthash="1309490" %)
1622 AT+BAT:  Get the current battery voltage in mV
1623
1624 (% _msthash="506119" _msttexthash="813891" %)
1625 AT+CFG:  Print all configurations
1626
1627 (% _msthash="506120" _msttexthash="551707" %)
1628 AT+WMOD:  Get or Set Work Mode
1629
1630 (% _msthash="506121" _msttexthash="2631499" %)
1631 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1632
1633 (% _msthash="506122" _msttexthash="3907150" %)
1634 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1635
1636 (% _msthash="506123" _msttexthash="854620" %)
1637 AT+SETCNT:  Set the count at present
1638
1639 (% _msthash="506124" _msttexthash="2554877" %)
1640 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1641
1642 (% _msthash="506125" _msttexthash="771849" %)
1643 AT+RPL:  Get or set response level
1644
1645 (% _msthash="506126" _msttexthash="1484314" %)
1646 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1647
1648 (% _msthash="506127" _msttexthash="741728" %)
1649 AT+LEAPSEC:  Get or Set Leap Second
1650
1651 (% _msthash="506128" _msttexthash="1694017" %)
1652 AT+SYNCMOD:  Get or Set time synchronization method
1653
1654 (% _msthash="506129" _msttexthash="2235948" %)
1655 AT+SYNCTDC:  Get or set time synchronization interval in day
1656
1657 (% _msthash="506130" _msttexthash="425542" %)
1658 AT+PID:  Get or set the PID
1659
1660
1661 == 6.2 Where to use AT commands and Downlink commands ==
1662
1663
1664 **AT commands：**
1665
1666 [[image:image-20220620153708-1.png||height="603" width="723"]]
1667
1668
1669 **Downlink commands:**
1670
1671
1672
1673 (% style="color:blue" %)**TTN:**
1674
1675 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1676
1677
1678
1679 (% style="color:blue" %)**Helium：**
1680
1681 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1682
1683
1684
1685 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1686
1687
1688 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1689
1690
1691 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1692
1693
1694
1695 (% style="color:blue" %)**Aws:**
1696
1697 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1698
1699
1700 == 6.3 How to change the uplink interval？ ==
1701
1702
1703 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);"]]
1704
1705
1706 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1707
1708
1709 [[image:image-20220615153355-1.png]]
1710
1711 [[image:1655802313617-381.png]]
1712
1713
1714 (((
1715 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.
1716 )))
1717
1718
1719 Input password and ATZ to activate LHT65N,As shown below:
1720
1721 [[image:image-20220615154519-3.png||height="672" width="807"]]
1722
1723
1724 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1725
1726
1727 [[image:image-20220615153355-1.png]]
1728
1729
1730 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1731
1732 [[image:image-20220615170542-5.png]]
1733
1734
1735
1736 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1737
1738 (% _msthash="506146" _msttexthash="52173160" %)
1739 First connect the four lines；(% style="display:none" %)
1740
1741 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1742
1743
1744 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1745
1746 [[image:image-20220621170938-2.png]]
1747
1748
1749
1750 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1751
1752 [[image:image-20220615171334-6.png]]
1753
1754
1755 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1756
1757
1758 When this interface appears, it indicates that the download has been completed.
1759
1760 [[image:image-20220620160723-8.png]]
1761
1762
1763 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1764
1765
1766 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1767
1768
1769 [[image:image-20220623110706-1.png]]
1770
1771
1772 [[image:image-20220623112117-4.png||height="459" width="343"]]
1773
1774
1775 (((
1776 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.
1777 )))
1778
1779
1780 Input password and ATZ to activate LHT65N,As shown below:
1781
1782 [[image:image-20220615154519-3.png||height="672" width="807"]]
1783
1784
1785 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1786
1787
1788 [[image:image-20220623110706-1.png]]
1789
1790
1791 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1792
1793 [[image:image-20220615170542-5.png]]
1794
1795
1796
1797 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1798
1799 (% _msthash="506146" _msttexthash="52173160" %)
1800 First connect the four lines；
1801
1802 (% _msthash="506146" _msttexthash="52173160" %)
1803 [[image:image-20220623113959-5.png||height="528" width="397"]]
1804
1805 (% _msthash="506146" _msttexthash="52173160" %)
1806 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1807
1808
1809
1810 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1811
1812 [[image:image-20220615171334-6.png]]
1813
1814
1815 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1816
1817
1818 When this interface appears, it indicates that the download has been completed.
1819
1820 [[image:image-20220620160723-8.png]]
1821
1822
1823 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1824
1825
1826 = 7. Order Info =
1827
1828
1829 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1830
1831 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1832
1833 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1834 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1835 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1836 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1837 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1838 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1839 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1840 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1841
1842 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1843
1844 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1845
1846
1847
1848 = 8. Packing Info =
1849
1850
1851 **Package Includes**:
1852
1853 * LHT65N Temperature & Humidity Sensor x 1
1854 * Optional external sensor
1855
1856 **Dimension and weight**:
1857
1858 * Device Size:  10 x 10 x 3.5 mm
1859 * Device Weight: 120.5g
1860
1861
1862
1863 = 9. Reference material =
1864
1865
1866 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1867
1868
1869
1870 = 10. FCC Warning =
1871
1872
1873 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1874
1875 (1) This device may not cause harmful interference；
1876
1877 (2) this device must accept any interference received, including interference that may cause undesired operation.
1878
1879
1880

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