Version 223.4 by Xiaoling on 2022/12/02 15:14
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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 == 1.2 Features ==
48
49
50 * Wall mountable
51 * LoRaWAN v1.0.3 Class A protocol
52 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
53 * AT Commands to change parameters
54 * Remote configure parameters via LoRaWAN Downlink
55 * Firmware upgradeable via program port
56 * Built-in 2400mAh battery for up to 10 years of use.
57 * Built-in Temperature & Humidity sensor
58 * Optional External Sensors
59 * Tri-color LED to indicate working status
60 * Datalog feature (Max 3328 records)
61
62
63
64 == 1.3 Specification ==
65
66
67 (% style="color:#037691" %)**Built-in Temperature Sensor:**
68
69 * Resolution: 0.01 °C
70 * Accuracy Tolerance : Typ ±0.3 °C
71 * Long Term Drift: < 0.02 °C/yr
72 * Operating Range: -40 ~~ 85 °C
73
74 (% style="color:#037691" %)**Built-in Humidity Sensor:**
75
76 * Resolution: 0.04 %RH
77 * Accuracy Tolerance : Typ ±3 %RH
78 * Long Term Drift: < 0.02 °C/yr
79 * Operating Range: 0 ~~ 96 %RH
80
81 (% style="color:#037691" %)**External Temperature Sensor:**
82
83 * Resolution: 0.0625 °C
84 * ±0.5°C accuracy from -10°C to +85°C
85 * ±2°C accuracy from -55°C to +125°C
86 * Operating Range: -55 °C ~~ 125 °C
87
88
89
90 = 2. Connect LHT65N to IoT Server =
91
92 == 2.1 How does LHT65N work? ==
93
94
95 (((
96 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.
97 )))
98
99 (((
100 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.
101 )))
102
103
104 == 2.2 How to Activate LHT65N? ==
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106
107 (((
108 The LHT65N has two working modes:
109 )))
110
111 * (((
112 (% 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.
113 )))
114 * (((
115 (% 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. 
116 )))
117
118 (((
119 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
120 )))
121
122
123 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
124
125 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
126
127
128 == 2.3 Example to join LoRaWAN network ==
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131 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
132 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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135 (% _mstvisible="1" class="wikigeneratedid" %)
136 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
137
138
139 (((
140 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:
141 )))
142
143
144 === 2.3.1 Step 1: Create Device n TTN ===
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146
147 (((
148 Create a device in TTN V3 with the OTAA keys from LHT65N.
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150
151 (((
152 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
153 )))
154
155 [[image:image-20220617150003-1.jpeg]]
156
157 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
158
159 Add APP EUI in the application.
160
161
162 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
163
164
165 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
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168 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
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171
172 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
173
174
175 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
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177
178 Input APP EUI,  APP KEY and DEV EUI:
179
180
181 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
182
183
184 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
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186
187 (((
188 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.
189 )))
190
191 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
192
193
194 == 2.4 Uplink Payload   ( Fport~=2) ==
195
196
197 (((
198 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.
199 )))
200
201 (((
202 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
203 )))
204
205 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
206 |=(% style="width: 60px;" %)(((
207 **Size(bytes)**
208 )))|=(% style="width: 30px;" %)(((
209 **2**
210 )))|=(% style="width: 100px;" %)(((
211 **2**
212 )))|=(% style="width: 100px;" %)(((
213 **2**
214 )))|=(% style="width: 50px;" %)(((
215 **1**
216 )))|=(% style="width: 50px;" %)(((
217 **4**
218 )))
219 |(% style="width:97px" %)(((
220 **Value**
221 )))|(% style="width:39px" %)(((
222 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
223 )))|(% style="width:100px" %)(((
224 (((
225 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
226 )))
227 )))|(% style="width:77px" %)(((
228 (((
229 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
230 )))
231 )))|(% style="width:47px" %)(((
232 [[Ext>>||anchor="H2.4.5Ext23"]] #
233 )))|(% style="width:51px" %)(((
234 [[Ext value>>||anchor="H2.4.6Extvalue"]]
235 )))
236
237 * The First 6 bytes: has fix meanings for every LHT65N.
238 * The 7th byte (EXT #): defines the external sensor model.
239 * 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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241
242
243 === 2.4.1 Decoder in TTN V3 ===
244
245
246 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.
247
248 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]]
249
250
251 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
252
253
254 === 2.4.2 BAT-Battery Info ===
255
256
257 These two bytes of BAT include the battery state and the actually voltage
258
259 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
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261
262 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
263
264
265 Check the battery voltage for LHT65N.
266
267 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
268 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
269
270
271
272 === 2.4.3 Built-in Temperature ===
273
274
275 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
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277 * Temperature:  0x0ABB/100=27.47℃
278
279 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
280
281 * Temperature:  (0xF5C6-65536)/100=-26.18℃
282
283
284
285 === 2.4.4 Built-in Humidity ===
286
287
288 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
289
290 * Humidity:    0x025C/10=60.4%
291
292
293
294 === 2.4.5 Ext # ===
295
296
297 Bytes for External Sensor:
298
299 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
300
301
302 === 2.4.6 Ext value ===
303
304 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
305
306
307 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
308
309
310 * DS18B20 temp=0x0ADD/100=27.81℃
311
312 The last 2 bytes of data are meaningless
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314
315
316 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
317
318
319 * External temperature= (0xF54F-65536)/100=-27.37℃
320
321 The last 2 bytes of data are meaningless
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323 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
324
325
326 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
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328
329 (((
330 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:
331 )))
332
333 (((
334
335 )))
336
337 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
338 |=(% style="width: 50px;" %)(((
339 **Size(bytes)**
340 )))|=(% style="width: 70px;" %)(((
341 **2**
342 )))|=(% style="width: 120px;" %)(((
343 **2**
344 )))|=(% style="width: 120px;" %)(((
345 **2**
346 )))|=(% style="width: 50px;" %)(((
347 **1**
348 )))|=(% style="width: 70px;" %)(((
349 **4**
350 )))
351 |(% style="width:110px" %)(((
352 **Value**
353 )))|(% style="width:71px" %)(((
354 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
355 )))|(% style="width:99px" %)(((
356 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
357 )))|(% style="width:132px" %)(((
358 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
359 )))|(% style="width:54px" %)(((
360 Status & Ext
361 )))|(% style="width:64px" %)(((
362 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
363 )))
364
365 * **Battery status & Built-in Humidity**
366
367 (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
368 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
369 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
370 BAT Status
371 00(b): Ultra Low ( BAT <= 2.50v)
372 01(b): Low  (2.50v <=BAT <= 2.55v)
373 10(b): OK   (2.55v <= BAT <=2.65v)
374 11(b): Good   (BAT >= 2.65v)
375 )))|(% style="width:132px" %)(((
376 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
377 )))
378
379 * **Status & Ext Byte**
380
381 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
382 |=(% 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]**
383 |=(% 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)
384
385 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
386 * (% 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.
387 * (% 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)
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389
390
391 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
392
393
394 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
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396 be used to power the external ADC sensor; user can control the power on time for this
397
398 (% style="color:blue" %)**sensor by setting:**
399
400 **AT+EXT=6,timeout**  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
401
402 **For example:**
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404 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
405
406
407 Or use **downlink command A2** to set the same.
408
409 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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411 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.
412
413 [[image:image-20220628150112-1.png||height="241" width="285"]]
414
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416 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
417
418 [[image:image-20220628150714-4.png]]
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421 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.
422
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424 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
425
426 [[image:image-20220628151005-5.png]]
427
428
429 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
430
431 [[image:image-20220628151056-6.png]]
432
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434 3) Within range
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436 [[image:image-20220628151143-7.png]]
437
438
439 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
440
441
442 [[image:image-20220927095645-1.png||height="534" width="460"]]
443
444
445 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
446
447 [[image:image-20220906102307-7.png]]
448
449
450 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
451
452 The external cable NE2 can be use for MOD4 and MOD8
453
454
455 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
456
457
458 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
459
460
461 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
462
463 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
464
465 In Open State, the power consumption is the same as if there is no probe
466
467 In Close state, the power consumption will be 3uA higher than normal.
468
469 [[image:image-20220906100852-1.png||height="205" width="377"]]
470
471
472 Ext=4,Interrupt Sensor：
473
474 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
475 |(% style="width:101px" %)(((
476 AT+EXT=4,1
477 )))|(% style="width:373px" %)(((
478 Sent uplink packet in both rising and falling interrupt
479 )))
480 |(% style="width:101px" %)(((
481 AT+EXT=4,2
482 )))|(% style="width:373px" %)(((
483 Sent uplink packet only in falling interrupt
484 )))
485 |(% style="width:101px" %)(((
486 AT+EXT=4,3
487 )))|(% style="width:373px" %)(((
488 Sent uplink packet only in rising interrupt
489 )))
490
491 Trigger by falling edge:
492
493 [[image:image-20220906101145-2.png]]
494
495
496 Trigger by raising edge：
497
498 [[image:image-20220906101145-3.png]]
499
500
501 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
502
503
504 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
505
506
507 (% 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.
508
509 [[image:image-20220906101320-4.png||height="366" width="698"]]
510
511
512 (% 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
513
514 [[image:image-20220906101320-5.png||height="353" width="696"]]
515
516
517 Ext=8, Counting Sensor ( 4 bytes)：
518
519 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
520 |(% style="width:138px" %)(((
521 AT+EXT=8,0
522 )))|(% style="width:240px" %)(((
523 Count at falling interrupt
524 )))
525 |(% style="width:138px" %)(((
526 AT+EXT=8,1
527 )))|(% style="width:240px" %)(((
528 Count at rising interrupt
529 )))
530 |(% style="width:138px" %)(((
531 AT+SETCNT=60
532 )))|(% style="width:240px" %)(((
533 Sent current count to 60
534 )))
535
536 [[image:image-20220906101320-6.png]]
537
538
539 (% style="color:blue" %)**A2 downlink Command：**
540
541 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
542
543 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
544
545 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
546
547 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
548
549 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)
550
551
552 == 2.5 Show data on Datacake ==
553
554
555 (((
556 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:
557 )))
558
559 (((
560
561 )))
562
563 (((
564 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
565 )))
566
567 (((
568 (% 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.
569 )))
570
571 (((
572
573 )))
574
575 (((
576 Add Datacake:
577 )))
578
579
580 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
581
582
583
584 Select default key as Access Key:
585
586
587 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
588
589
590 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
591
592
593 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
594
595
596 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
597
598
599 == 2.6 Datalog Feature ==
600
601
602 (((
603 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.
604 )))
605
606
607 === 2.6.1 Ways to get datalog via LoRaWAN ===
608
609
610 There are two methods:
611
612 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
613
614
615 (% 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.
616
617
618 (% style="color:red" %)**Note for method 2:**
619
620 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
621 * 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.
622
623 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
624
625
626 [[image:image-20220703111700-2.png||height="381" width="1119"]]
627
628
629 === 2.6.2 Unix TimeStamp ===
630
631
632 LHT65N uses Unix TimeStamp format based on
633
634
635 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
636
637
638
639 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
640
641 Below is the converter example
642
643 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
644
645
646 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
647
648
649 === 2.6.3 Set Device Time ===
650
651
652 (((
653 (% style="color:blue" %)**There are two ways to set device's time:**
654 )))
655
656 (((
657 **1.  Through LoRaWAN MAC Command (Default settings)**
658 )))
659
660 (((
661 User need to set SYNCMOD=1 to enable sync time via MAC command.
662 )))
663
664 (((
665 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).
666 )))
667
668 (((
669 (% 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.**
670 )))
671
672
673
674 (((
675 **2. Manually Set Time**
676 )))
677
678 (((
679 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
680 )))
681
682
683 === 2.6.4 Poll sensor value ===
684
685
686 User can poll sensor value based on timestamps from the server. Below is the downlink command.
687
688 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
689
690
691 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.
692
693 For example, downlink command **31 5FC5F350 5FC6 0160 05**
694
695 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
696
697 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
698
699
700 === 2.6.5 Datalog Uplink payload ===
701
702
703 The Datalog poll reply uplink will use below payload format.
704
705 **Retrieval data payload:**
706
707 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
708 |=(% style="width: 60px;" %)(((
709 **Size(bytes)**
710 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
711 |(% 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"]]
712
713 **Poll message flag & Ext:**
714
715 [[image:image-20221006192726-1.png||height="112" width="754"]]
716
717 (% 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)
718
719 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
720
721 * Poll Message Flag is set to 1.
722
723 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
724
725 For example, in US915 band, the max payload for different DR is:
726
727 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
728
729 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
730
731 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
732
733 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
734
735 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
736
737
738 **Example:**
739
740 If LHT65N has below data inside Flash:
741
742 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
743
744
745 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
746
747 Where : Start time: 60065F97 = time 21/1/19 04:27:03
748
749 Stop time: 60066DA7= time 21/1/19 05:27:03
750
751
752 **LHT65N will uplink this payload.**
753
754 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
755
756
757 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
758
759 Where the first 11 bytes is for the first entry:
760
761 7FFF089801464160065F97
762
763 Ext sensor data=0x7FFF/100=327.67
764
765 Temp=0x088E/100=22.00
766
767 Hum=0x014B/10=32.6
768
769 poll message flag & Ext=0x41,means reply data,Ext=1
770
771 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
772
773
774 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
775
776
777 (((
778 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.
779 )))
780
781 (((
782 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
783
784
785 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
786
787
788 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
789
790 (((
791 (% class="box infomessage" %)
792 (((
793 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
794
795 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
796
797 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
798
799 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
800
801 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
802
803 **AT+LEDALARM=1** :       Enable LED visual Alarm.
804 )))
805 )))
806
807 (% style="color:#4f81bd" %)**Downlink Command:**
808
809 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
810
811 AT+CITEMP=1 : A60001
812
813 AT+ARTEMP=1,60  :  A70001003C
814
815 AT+ARTEMP=-16,60 :  A7FFF0003C
816
817 AT+LEDALARM=1  :  3601
818
819
820 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
821
822 Total bytes: 8 bytes
823
824 **Example: **AA0100010001003C
825
826 WMOD=01
827
828 CITEMP=0001
829
830 TEMPlow=0001
831
832 TEMPhigh=003C
833
834
835 **DS18B20 and TMP117 Threshold Alarm**
836
837 **~ AT+WMOD=1,60,-10,20**
838
839 (% style="color:#4f81bd" %)**Downlink Command:**
840
841 **Example: **A5013CFC180014
842
843 MOD=01
844
845 CITEMP=3C(S)
846
847 TEMPlow=FC18
848
849 TEMPhigh=0014
850
851
852 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
853
854 **AT+WMOD=2,60,5** 
855
856 (% style="color:#4f81bd" %)**Downlink Command:**
857
858 **Example: **A5023C05
859
860 MOD=02
861
862 CITEMP=3C(S)
863
864 temperature fluctuation=05
865
866
867 ==== **Sampling multiple times and uplink together** ====
868
869 **AT+WMOD=3,1,60,20,-16,32,1**   
870
871 Explain:
872
873 * Set Working Mode to **Mode 3**
874 * Sampling Interval is **60**s.
875 * 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)
876 * Temperature alarm range is **-16** to **32**°C,
877 * **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.
878
879 (% style="color:#4f81bd" %)**Downlink Command:**
880
881 **Example: **A50301003C14FFF0002001
882
883 MOD=03
884
885 EXT=01
886
887 CITEMP=003C(S)
888
889 Total number of acquisitions=14
890
891 TEMPlow=FFF0
892
893 TEMPhigh=0020
894
895 ARTEMP=01
896
897
898 **Uplink payload( Fport=3)**
899
900 **Example: CBEA**01**0992**//0A41//**09C4**
901
902 BatV=CBEA
903
904 EXT=01
905
906 Temp1=0992  ~/~/ 24.50℃
907
908 Temp2=0A41  ~/~/ 26.25℃
909
910 Temp3=09C4  ~/~/ 25.00℃
911
912
913 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
914
915 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
916 )))
917
918
919 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
920
921
922 (% _mstvisible="1" class="box infomessage" %)
923 (((
924 (((
925 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
926 )))
927
928 (((
929 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
930 )))
931
932 (((
933 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
934 )))
935
936 (((
937 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
938 )))
939
940 (((
941 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
942 )))
943 )))
944
945 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
946
947 Total bytes: 8 bytes
948
949 **Example:**AA0100010001003C
950
951 WMOD=01
952
953 CITEMP=0001
954
955 TEMPlow=0001
956
957 TEMPhigh=003C
958
959
960 == 2.8 LED Indicator ==
961
962
963 The LHT65 has a triple color LED which for easy showing different stage .
964
965 While user press ACT button, the LED will work as per LED status with ACT button.
966
967 In a normal working state:
968
969 * For each uplink, the BLUE LED or RED LED will blink once.
970 BLUE LED when external sensor is connected.
971 * RED LED when external sensor is not connected
972 * For each success downlink, the PURPLE LED will blink once
973
974
975
976 == 2.9 installation ==
977
978
979 (% _mstvisible="1" %)
980 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
981
982
983 = 3. Sensors and Accessories =
984
985 == 3.1 E2 Extension Cable ==
986
987
988 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
989
990
991 **1m long breakout cable for LHT65N. Features:**
992
993 * (((
994 Use for AT Command， works for both LHT52/LHT65N
995 )))
996 * (((
997 Update firmware for LHT65N, works for both LHT52/LHT65N
998 )))
999 * (((
1000 Supports ADC mode to monitor external ADC
1001 )))
1002 * (((
1003 Supports Interrupt mode
1004 )))
1005 * (((
1006 Exposed All pins from the LHT65N Type-C connector.
1007
1008
1009
1010 )))
1011
1012 [[image:image-20220619092421-3.png||height="371" width="529"]]
1013
1014
1015 == 3.2 E3 Temperature Probe ==
1016
1017
1018 [[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"]]
1019
1020
1021 Temperature sensor with 2 meters cable long
1022
1023 * Resolution: 0.0625 °C
1024 * ±0.5°C accuracy from -10°C to +85°C
1025 * ±2°C accuracy from -55°C to +125°C
1026 * Operating Range: -40 ~~ 125 °C
1027 * Working voltage 2.35v ~~ 5v
1028
1029
1030
1031 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1032
1033
1034 (((
1035 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1036 )))
1037
1038 * (((
1039 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1040 )))
1041
1042 * (((
1043 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1044 )))
1045
1046 (((
1047 There are two kinds of commands to configure LHT65N, they are:
1048 )))
1049
1050 * (((
1051 (% style="color:#4f81bd" %)**General Commands**.
1052 )))
1053
1054 (((
1055 These commands are to configure:
1056 )))
1057
1058 1. (((
1059 General system settings like: uplink interval.
1060 )))
1061 1. (((
1062 LoRaWAN protocol & radio-related commands.
1063 )))
1064
1065 (((
1066 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]]
1067 )))
1068
1069 * (((
1070 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1071 )))
1072
1073 (((
1074 These commands are only valid for LHT65N, as below:
1075 )))
1076
1077
1078 == 4.1 Set Transmit Interval Time ==
1079
1080
1081 Feature: Change LoRaWAN End Node Transmit Interval.
1082
1083
1084 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1085
1086 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1087
1088
1089 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1090
1091 Format: Command Code (0x01) followed by 3 bytes time value.
1092
1093 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1094
1095 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1096
1097 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1098
1099
1100
1101 == 4.2 Set External Sensor Mode ==
1102
1103
1104 Feature: Change External Sensor Mode.
1105
1106
1107 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1108
1109 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1110
1111
1112 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1113
1114 Total bytes: 2 ~~ 5 bytes
1115
1116 **Example:**
1117
1118 * 0xA201: Set external sensor type to E1
1119
1120 * 0xA209: Same as AT+EXT=9
1121
1122 * 0xA20702003c: Same as AT+SETCNT=60
1123
1124
1125
1126 == 4.3 Enable/Disable uplink Temperature probe ID ==
1127
1128
1129 (((
1130 Feature: If PID is enabled, device will send the temperature probe ID on:
1131 )))
1132
1133 * (((
1134 First Packet after OTAA Join
1135 )))
1136 * (((
1137 Every 24 hours since the first packet.
1138 )))
1139
1140 (((
1141 PID is default set to disable (0)
1142
1143
1144 )))
1145
1146 (% style="color:#4f81bd" %)**AT Command:**
1147
1148 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1149
1150
1151 (% style="color:#4f81bd" %)**Downlink Command:**
1152
1153 * **0xA800**  **~-~->** AT+PID=0
1154 * **0xA801**     **~-~->** AT+PID=1
1155
1156
1157
1158 == 4.4 Set Password ==
1159
1160
1161 Feature: Set device password, max 9 digits
1162
1163
1164 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1165
1166 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1167
1168
1169 (% style="color:#4f81bd" %)**Downlink Command:**
1170
1171 No downlink command for this feature.
1172
1173
1174 == 4.5 Quit AT Command ==
1175
1176
1177 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1178
1179
1180 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1181
1182 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1183
1184
1185 (% style="color:#4f81bd" %)**Downlink Command:**
1186
1187 No downlink command for this feature.
1188
1189
1190 == 4.6 Set to sleep mode ==
1191
1192
1193 Feature: Set device to sleep mode
1194
1195 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1196 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1197
1198 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1199
1200 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1201
1202
1203 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1204
1205 * There is no downlink command to set to Sleep mode.
1206
1207
1208
1209 == 4.7 Set system time ==
1210
1211
1212 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1213
1214
1215 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1216
1217 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1218
1219
1220 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1221
1222 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1223
1224
1225 == 4.8 Set Time Sync Mode ==
1226
1227
1228 (((
1229 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1230 )))
1231
1232 (((
1233 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.
1234
1235
1236 )))
1237
1238 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1239
1240 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1241
1242
1243 (% style="color:#4f81bd" %)**Downlink Command:**
1244
1245 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1246 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1247
1248
1249 == 4.9 Set Time Sync Interval ==
1250
1251
1252 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1253
1254
1255 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1256
1257 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1258
1259
1260 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1261
1262 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1263
1264
1265 == 4.10 Print data entries base on page. ==
1266
1267
1268 Feature: Print the sector data from start page to stop page (max is 416 pages).
1269
1270
1271 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1272
1273 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1274
1275
1276 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1277
1278 No downlink commands for feature
1279
1280
1281 == 4.11 Print last few data entries. ==
1282
1283
1284 Feature: Print the last few data entries
1285
1286
1287 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1288
1289 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1290
1291
1292 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1293
1294 No downlink commands for feature
1295
1296
1297 == 4.12 Clear Flash Record ==
1298
1299
1300 Feature: Clear flash storage for data log feature.
1301
1302
1303 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1304
1305 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1306
1307
1308 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1309
1310 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1311
1312
1313
1314 == 4.13 Auto Send None-ACK messages ==
1315
1316
1317 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.
1318
1319
1320 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1321
1322 The default factory setting is 0
1323
1324 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1325 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1326 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1327
1328 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1329
1330 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1331
1332
1333
1334 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1335
1336
1337 Feature: Set internal and external temperature sensor alarms.
1338
1339 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1340 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1341 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1342
1343 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1344
1345 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1346
1347 0): Cancel
1348
1349 1): Threshold alarm
1350
1351 2): Fluctuation alarm
1352
1353
1354 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1355
1356 (% 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.**
1357
1358
1359 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1360
1361 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1362
1363 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1364
1365
1366 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.
1367
1368 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1369
1370 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1371
1372
1373 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1374
1375 0xA5 00 ~-~- AT+WMOD=0.
1376
1377 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 )
1378
1379 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))
1380
1381 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1382
1383 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.
1384
1385
1386 = 5. Battery & How to replace =
1387
1388 == 5.1 Battery Type ==
1389
1390
1391 (((
1392 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.
1393 )))
1394
1395 (((
1396 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1397
1398
1399 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1400 )))
1401
1402 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1403
1404
1405 == 5.2 Replace Battery ==
1406
1407
1408 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.
1409
1410 [[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"]]
1411
1412
1413 == 5.3 Battery Life Analyze ==
1414
1415
1416 (((
1417 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:
1418 [[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]]
1419 )))
1420
1421
1422 (((
1423 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]]
1424 )))
1425
1426
1427 = 6. FAQ =
1428
1429 == 6.1 How to use AT Command? ==
1430
1431
1432 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.
1433
1434 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1435
1436
1437 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1438
1439 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1440 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1441 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1442
1443 (((
1444 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.
1445 )))
1446
1447
1448 Input password and ATZ to activate LHT65N,As shown below:
1449
1450 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1451
1452
1453 (% _msthash="506066" _msttexthash="544869" %)
1454 AT Command List is as below:
1455
1456 (% _msthash="506067" _msttexthash="361920" %)
1457 AT+<CMD>? :  Help on <CMD>
1458
1459 (% _msthash="506068" _msttexthash="243061" %)
1460 AT+<CMD> :  Run <CMD>
1461
1462 (% _msthash="506069" _msttexthash="704197" %)
1463 AT+<CMD>=<value> :  Set the value
1464
1465 (% _msthash="506070" _msttexthash="455676" %)
1466 AT+<CMD>=? :  Get the value
1467
1468 (% _msthash="506071" _msttexthash="670553" %)
1469 AT+DEBUG:  Set more info output
1470
1471 (% _msthash="506072" _msttexthash="485888" %)
1472 ATZ:  Trig a reset of the MCU
1473
1474 (% _msthash="506073" _msttexthash="2068872" %)
1475 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1476
1477 (% _msthash="506074" _msttexthash="689169" %)
1478 AT+DEUI:  Get or Set the Device EUI
1479
1480 (% _msthash="506075" _msttexthash="960414" %)
1481 AT+DADDR:  Get or Set the Device Address
1482
1483 (% _msthash="506076" _msttexthash="1079897" %)
1484 AT+APPKEY:  Get or Set the Application Key
1485
1486 (% _msthash="506077" _msttexthash="1326143" %)
1487 AT+NWKSKEY:  Get or Set the Network Session Key
1488
1489 (% _msthash="506078" _msttexthash="1573000" %)
1490 AT+APPSKEY:  Get or Set the Application Session Key
1491
1492 (% _msthash="506079" _msttexthash="1041729" %)
1493 AT+APPEUI:  Get or Set the Application EUI
1494
1495 (% _msthash="506080" _msttexthash="2104206" %)
1496 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1497
1498 (% _msthash="506081" _msttexthash="3369288" %)
1499 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1500
1501 (% _msthash="506082" _msttexthash="1894529" %)
1502 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1503
1504 (% _msthash="506083" _msttexthash="3864172" %)
1505 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1506
1507 (% _msthash="506084" _msttexthash="1712204" %)
1508 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1509
1510 (% _msthash="506085" _msttexthash="1281202" %)
1511 AT+RX2FQ:  Get or Set the Rx2 window frequency
1512
1513 (% _msthash="506086" _msttexthash="2796781" %)
1514 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1515
1516 (% _msthash="506087" _msttexthash="3285165" %)
1517 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1518
1519 (% _msthash="506088" _msttexthash="3286179" %)
1520 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1521
1522 (% _msthash="506089" _msttexthash="4703803" %)
1523 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1524
1525 (% _msthash="506090" _msttexthash="4704999" %)
1526 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1527
1528 (% _msthash="506091" _msttexthash="1528683" %)
1529 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1530
1531 (% _msthash="506092" _msttexthash="757185" %)
1532 AT+NWKID:  Get or Set the Network ID
1533
1534 (% _msthash="506093" _msttexthash="1156597" %)
1535 AT+FCU:  Get or Set the Frame Counter Uplink
1536
1537 (% _msthash="506094" _msttexthash="1273987" %)
1538 AT+FCD:  Get or Set the Frame Counter Downlink
1539
1540 (% _msthash="506095" _msttexthash="859222" %)
1541 AT+CLASS:  Get or Set the Device Class
1542
1543 (% _msthash="506096" _msttexthash="384852" %)
1544 AT+JOIN:  Join network
1545
1546 (% _msthash="506097" _msttexthash="548626" %)
1547 AT+NJS:  Get the join status
1548
1549 (% _msthash="506098" _msttexthash="2546206" %)
1550 AT+SENDB:  Send hexadecimal data along with the application port
1551
1552 (% _msthash="506099" _msttexthash="1932307" %)
1553 AT+SEND:  Send text data along with the application port
1554
1555 (% _msthash="506100" _msttexthash="3560557" %)
1556 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1557
1558 (% _msthash="506101" _msttexthash="1429701" %)
1559 AT+RECV:  Print last received data in raw format
1560
1561 (% _msthash="506102" _msttexthash="1735981" %)
1562 AT+VER:  Get current image version and Frequency Band
1563
1564 (% _msthash="506103" _msttexthash="1189474" %)
1565 AT+CFM:  Get or Set the confirmation mode (0-1)
1566
1567 (% _msthash="506104" _msttexthash="1718210" %)
1568 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1569
1570 (% _msthash="506105" _msttexthash="1339403" %)
1571 AT+SNR:  Get the SNR of the last received packet
1572
1573 (% _msthash="506106" _msttexthash="1452009" %)
1574 AT+RSSI:  Get the RSSI of the last received packet
1575
1576 (% _msthash="506107" _msttexthash="2768142" %)
1577 AT+TDC:  Get or set the application data transmission interval in ms
1578
1579 (% _msthash="506108" _msttexthash="1083914" %)
1580 AT+PORT:  Get or set the application port
1581
1582 (% _msthash="506109" _msttexthash="622440" %)
1583 AT+DISAT:  Disable AT commands
1584
1585 (% _msthash="506110" _msttexthash="868361" %)
1586 AT+PWORD: Set password, max 9 digits
1587
1588 (% _msthash="506111" _msttexthash="2210299" %)
1589 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1590
1591 (% _msthash="506112" _msttexthash="2113462" %)
1592 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1593
1594 (% _msthash="506113" _msttexthash="2087423" %)
1595 AT+PDTA:  Print the sector data from start page to stop page
1596
1597 (% _msthash="506114" _msttexthash="1063127" %)
1598 AT+PLDTA:  Print the last few sets of data
1599
1600 (% _msthash="506115" _msttexthash="1999426" %)
1601 AT+CLRDTA:  Clear the storage, record position back to 1st
1602
1603 (% _msthash="506116" _msttexthash="442130" %)
1604 AT+SLEEP:  Set sleep mode
1605
1606 (% _msthash="506117" _msttexthash="1080222" %)
1607 AT+EXT:  Get or Set external sensor model
1608
1609 (% _msthash="506118" _msttexthash="1309490" %)
1610 AT+BAT:  Get the current battery voltage in mV
1611
1612 (% _msthash="506119" _msttexthash="813891" %)
1613 AT+CFG:  Print all configurations
1614
1615 (% _msthash="506120" _msttexthash="551707" %)
1616 AT+WMOD:  Get or Set Work Mode
1617
1618 (% _msthash="506121" _msttexthash="2631499" %)
1619 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1620
1621 (% _msthash="506122" _msttexthash="3907150" %)
1622 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1623
1624 (% _msthash="506123" _msttexthash="854620" %)
1625 AT+SETCNT:  Set the count at present
1626
1627 (% _msthash="506124" _msttexthash="2554877" %)
1628 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1629
1630 (% _msthash="506125" _msttexthash="771849" %)
1631 AT+RPL:  Get or set response level
1632
1633 (% _msthash="506126" _msttexthash="1484314" %)
1634 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1635
1636 (% _msthash="506127" _msttexthash="741728" %)
1637 AT+LEAPSEC:  Get or Set Leap Second
1638
1639 (% _msthash="506128" _msttexthash="1694017" %)
1640 AT+SYNCMOD:  Get or Set time synchronization method
1641
1642 (% _msthash="506129" _msttexthash="2235948" %)
1643 AT+SYNCTDC:  Get or set time synchronization interval in day
1644
1645 (% _msthash="506130" _msttexthash="425542" %)
1646 AT+PID:  Get or set the PID
1647
1648
1649 == 6.2 Where to use AT commands and Downlink commands ==
1650
1651
1652 **AT commands：**
1653
1654 [[image:image-20220620153708-1.png||height="603" width="723"]]
1655
1656
1657 **Downlink commands:**
1658
1659
1660
1661 (% style="color:blue" %)**TTN:**
1662
1663 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1664
1665
1666
1667 (% style="color:blue" %)**Helium：**
1668
1669 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1670
1671
1672
1673 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1674
1675
1676 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1677
1678
1679 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1680
1681
1682
1683 (% style="color:blue" %)**Aws:**
1684
1685 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1686
1687
1688 == 6.3 How to change the uplink interval？ ==
1689
1690
1691 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);"]]
1692
1693
1694 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1695
1696
1697 [[image:image-20220615153355-1.png]]
1698
1699 [[image:1655802313617-381.png]]
1700
1701
1702 (((
1703 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.
1704 )))
1705
1706
1707 Input password and ATZ to activate LHT65N,As shown below:
1708
1709 [[image:image-20220615154519-3.png||height="672" width="807"]]
1710
1711
1712 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1713
1714
1715 [[image:image-20220615153355-1.png]]
1716
1717
1718 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1719
1720 [[image:image-20220615170542-5.png]]
1721
1722
1723
1724 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1725
1726 (% _msthash="506146" _msttexthash="52173160" %)
1727 First connect the four lines；(% style="display:none" %)
1728
1729 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1730
1731
1732 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1733
1734 [[image:image-20220621170938-2.png]]
1735
1736
1737
1738 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1739
1740 [[image:image-20220615171334-6.png]]
1741
1742
1743 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1744
1745
1746 When this interface appears, it indicates that the download has been completed.
1747
1748 [[image:image-20220620160723-8.png]]
1749
1750
1751 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1752
1753
1754 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1755
1756
1757 [[image:image-20220623110706-1.png]]
1758
1759
1760 [[image:image-20220623112117-4.png||height="459" width="343"]]
1761
1762
1763 (((
1764 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.
1765 )))
1766
1767
1768 Input password and ATZ to activate LHT65N,As shown below:
1769
1770 [[image:image-20220615154519-3.png||height="672" width="807"]]
1771
1772
1773 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1774
1775
1776 [[image:image-20220623110706-1.png]]
1777
1778
1779 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1780
1781 [[image:image-20220615170542-5.png]]
1782
1783
1784
1785 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1786
1787 (% _msthash="506146" _msttexthash="52173160" %)
1788 First connect the four lines；
1789
1790 (% _msthash="506146" _msttexthash="52173160" %)
1791 [[image:image-20220623113959-5.png||height="528" width="397"]]
1792
1793 (% _msthash="506146" _msttexthash="52173160" %)
1794 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1795
1796
1797
1798 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1799
1800 [[image:image-20220615171334-6.png]]
1801
1802
1803 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1804
1805
1806 When this interface appears, it indicates that the download has been completed.
1807
1808 [[image:image-20220620160723-8.png]]
1809
1810
1811 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1812
1813
1814 = 7. Order Info =
1815
1816
1817 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1818
1819 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1820
1821 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1822 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1823 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1824 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1825 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1826 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1827 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1828 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1829
1830 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1831
1832 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1833
1834
1835
1836 = 8. Packing Info =
1837
1838
1839 **Package Includes**:
1840
1841 * LHT65N Temperature & Humidity Sensor x 1
1842 * Optional external sensor
1843
1844 **Dimension and weight**:
1845
1846 * Device Size:  10 x 10 x 3.5 mm
1847 * Device Weight: 120.5g
1848
1849
1850
1851 = 9. Reference material =
1852
1853
1854 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1855
1856
1857
1858 = 10. FCC Warning =
1859
1860
1861 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1862
1863 (1) This device may not cause harmful interference；
1864
1865 (2) this device must accept any interference received, including interference that may cause undesired operation.
1866
1867
1868

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