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Version 217.2 by Xiaoling on 2022/11/12 17:20
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9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
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11 {{toc/}}
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15
16
17 = 1. Introduction =
18
19
20 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
21
22
23 (((
24 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
25 )))
26
27 (((
28 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
29 )))
30
31 (((
32 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
33 )))
34
35 (((
36 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
37 )))
38
39 (((
40 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
41 )))
42
43 (((
44 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
45 )))
46
47
48
49 == 1.2 Features ==
50
51
52 * Wall mountable
53 * LoRaWAN v1.0.3 Class A protocol
54 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
55 * AT Commands to change parameters
56 * Remote configure parameters via LoRaWAN Downlink
57 * Firmware upgradeable via program port
58 * Built-in 2400mAh battery for up to 10 years of use.
59 * Built-in Temperature & Humidity sensor
60 * Optional External Sensors
61 * Tri-color LED to indicate working status
62 * Datalog feature (Max 3328 records)
63
64
65
66
67 == 1.3 Specification ==
68
69
70 (% style="color:#037691" %)**Built-in Temperature Sensor:**
71
72 * Resolution: 0.01 °C
73 * Accuracy Tolerance : Typ ±0.3 °C
74 * Long Term Drift: < 0.02 °C/yr
75 * Operating Range: -40 ~~ 85 °C
76
77 (% style="color:#037691" %)**Built-in Humidity Sensor:**
78
79 * Resolution: 0.04 %RH
80 * Accuracy Tolerance : Typ ±3 %RH
81 * Long Term Drift: < 0.02 °C/yr
82 * Operating Range: 0 ~~ 96 %RH
83
84 (% style="color:#037691" %)**External Temperature Sensor:**
85
86 * Resolution: 0.0625 °C
87 * ±0.5°C accuracy from -10°C to +85°C
88 * ±2°C accuracy from -55°C to +125°C
89 * Operating Range: -55 °C ~~ 125 °C
90
91
92
93
94 = 2. Connect LHT65N to IoT Server =
95
96
97 == 2.1 How does LHT65N work? ==
98
99
100 (((
101 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.
102 )))
103
104 (((
105 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.
106 )))
107
108
109
110 == 2.2 How to Activate LHT65N? ==
111
112
113 (((
114 The LHT65N has two working modes:
115 )))
116
117 * (((
118 (% 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.
119 )))
120 * (((
121 (% 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. 
122 )))
123
124 (((
125 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
126 )))
127
128
129 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
130
131 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
132
133
134
135 == 2.3 Example to join LoRaWAN network ==
136
137
138 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
139 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.
140
141
142 (% _mstvisible="1" class="wikigeneratedid" %)
143 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
144
145
146 (((
147 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:
148 )))
149
150
151
152 === 2.3.1 Step 1: Create Device n TTN ===
153
154
155 (((
156 Create a device in TTN V3 with the OTAA keys from LHT65N.
157 )))
158
159 (((
160 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
161 )))
162
163 [[image:image-20220617150003-1.jpeg]]
164
165 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
166
167 Add APP EUI in the application.
168
169
170 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
171
172
173 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
174
175
176 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
177
178
179
180 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
181
182
183 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
184
185
186 Input APP EUI,  APP KEY and DEV EUI:
187
188
189 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
190
191
192
193
194 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
195
196
197 (((
198 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.
199 )))
200
201 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
202
203
204
205 == 2.4 Uplink Payload   ( Fport~=2) ==
206
207
208 (((
209 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.
210 )))
211
212 (((
213 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
214 )))
215
216 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
217 |=(% style="width: 60px;" %)(((
218 **Size(bytes)**
219 )))|=(% style="width: 30px;" %)(((
220 **2**
221 )))|=(% style="width: 100px;" %)(((
222 **2**
223 )))|=(% style="width: 100px;" %)(((
224 **2**
225 )))|=(% style="width: 50px;" %)(((
226 **1**
227 )))|=(% style="width: 50px;" %)(((
228 **4**
229 )))
230 |(% style="width:97px" %)(((
231 **Value**
232 )))|(% style="width:39px" %)(((
233 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
234 )))|(% style="width:100px" %)(((
235 (((
236 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
237 )))
238 )))|(% style="width:77px" %)(((
239 (((
240 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
241 )))
242 )))|(% style="width:47px" %)(((
243 [[Ext>>||anchor="H2.4.5Ext23"]] #
244 )))|(% style="width:51px" %)(((
245 [[Ext value>>||anchor="H2.4.6Extvalue"]]
246 )))
247
248 * The First 6 bytes: has fix meanings for every LHT65N.
249 * The 7th byte (EXT #): defines the external sensor model.
250 * 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.)
251
252
253 === 2.4.1 Decoder in TTN V3 ===
254
255
256 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.
257
258 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]]
259
260
261 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
262
263
264
265 === 2.4.2 BAT-Battery Info ===
266
267
268 These two bytes of BAT include the battery state and the actually voltage
269
270 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
271
272
273 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
274
275
276 Check the battery voltage for LHT65N.
277
278 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
279 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
280
281
282
283
284 === 2.4.3 Built-in Temperature ===
285
286
287 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
288
289 * Temperature:  0x0ABB/100=27.47℃
290
291 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
292
293 * Temperature:  (0xF5C6-65536)/100=-26.18℃
294
295
296
297
298 === 2.4.4 Built-in Humidity ===
299
300
301 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
302
303 * Humidity:    0x025C/10=60.4%
304
305
306
307
308 === 2.4.5 Ext # ===
309
310
311 Bytes for External Sensor:
312
313 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
314
315
316
317 === 2.4.6 Ext value ===
318
319
320 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
321
322
323 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
324
325
326 * DS18B20 temp=0x0ADD/100=27.81℃
327
328 The last 2 bytes of data are meaningless
329
330
331
332 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
333
334
335 * External temperature= (0xF54F-65536)/100=-27.37℃
336
337 The last 2 bytes of data are meaningless
338
339 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
340
341
342
343 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
344
345
346 (((
347 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:
348 )))
349
350 (((
351
352 )))
353
354 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
355 |=(% style="width: 50px;" %)(((
356 **Size(bytes)**
357 )))|=(% style="width: 70px;" %)(((
358 **2**
359 )))|=(% style="width: 120px;" %)(((
360 **2**
361 )))|=(% style="width: 120px;" %)(((
362 **2**
363 )))|=(% style="width: 50px;" %)(((
364 **1**
365 )))|=(% style="width: 70px;" %)(((
366 **4**
367 )))
368 |(% style="width:110px" %)(((
369 **Value**
370 )))|(% style="width:71px" %)(((
371 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
372 )))|(% style="width:99px" %)(((
373 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
374 )))|(% style="width:132px" %)(((
375 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
376 )))|(% style="width:54px" %)(((
377 Status & Ext
378 )))|(% style="width:64px" %)(((
379 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
380 )))
381
382 * **Battery status & Built-in Humidity**
383
384 (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
385 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
386 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
387 BAT Status
388 00(b): Ultra Low ( BAT <= 2.50v)
389 01(b): Low  (2.50v <=BAT <= 2.55v)
390 10(b): OK   (2.55v <= BAT <=2.65v)
391 11(b): Good   (BAT >= 2.65v)
392 )))|(% style="width:132px" %)(((
393 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
394 )))
395
396 * **Status & Ext Byte**
397
398 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
399 |=(% 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]**
400 |=(% 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)
401
402 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
403 * (% 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.
404 * (% 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)
405
406
407
408
409 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
410
411
412 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
413
414 be used to power the external ADC sensor; user can control the power on time for this
415
416 (% style="color:blue" %)**sensor by setting:**
417
418 **AT+EXT=6,timeout**  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
419
420 **For example:**
421
422 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
423
424
425 Or use **downlink command A2** to set the same.
426
427 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
428
429 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.
430
431 [[image:image-20220628150112-1.png||height="241" width="285"]]
432
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434 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
435
436 [[image:image-20220628150714-4.png]]
437
438
439 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.
440
441
442 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
443
444 [[image:image-20220628151005-5.png]]
445
446
447 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
448
449 [[image:image-20220628151056-6.png]]
450
451
452 3) Within range
453
454 [[image:image-20220628151143-7.png]]
455
456
457
458 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
459
460
461 [[image:image-20220927095645-1.png||height="534" width="460"]]
462
463
464 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
465
466 [[image:image-20220906102307-7.png]]
467
468
469 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
470
471 The external cable NE2 can be use for MOD4 and MOD8
472
473
474
475 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
476
477
478 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
479
480
481 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
482
483 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
484
485 In Open State, the power consumption is the same as if there is no probe
486
487 In Close state, the power consumption will be 3uA higher than normal.
488
489 [[image:image-20220906100852-1.png||height="205" width="377"]]
490
491
492 Ext=4,Interrupt Sensor：
493
494 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
495 |(% style="width:101px" %)(((
496 AT+EXT=4,1
497 )))|(% style="width:373px" %)(((
498 Sent uplink packet in both rising and falling interrupt
499 )))
500 |(% style="width:101px" %)(((
501 AT+EXT=4,2
502 )))|(% style="width:373px" %)(((
503 Sent uplink packet only in falling interrupt
504 )))
505 |(% style="width:101px" %)(((
506 AT+EXT=4,3
507 )))|(% style="width:373px" %)(((
508 Sent uplink packet only in rising interrupt
509 )))
510
511 Trigger by falling edge:
512
513 [[image:image-20220906101145-2.png]]
514
515
516 Trigger by raising edge：
517
518 [[image:image-20220906101145-3.png]]
519
520
521
522 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
523
524
525 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
526
527
528 (% 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.
529
530 [[image:image-20220906101320-4.png||height="366" width="698"]]
531
532
533 (% 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
534
535 [[image:image-20220906101320-5.png||height="353" width="696"]]
536
537
538 Ext=8, Counting Sensor ( 4 bytes)：
539
540 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
541 |(% style="width:138px" %)(((
542 AT+EXT=8,0
543 )))|(% style="width:240px" %)(((
544 Count at falling interrupt
545 )))
546 |(% style="width:138px" %)(((
547 AT+EXT=8,1
548 )))|(% style="width:240px" %)(((
549 Count at rising interrupt
550 )))
551 |(% style="width:138px" %)(((
552 AT+SETCNT=60
553 )))|(% style="width:240px" %)(((
554 Sent current count to 60
555 )))
556
557 [[image:image-20220906101320-6.png]]
558
559
560 (% style="color:blue" %)**A2 downlink Command：**
561
562 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
563
564 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
565
566 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
567
568 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
569
570 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)
571
572
573
574 == 2.5 Show data on Datacake ==
575
576
577 (((
578 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:
579 )))
580
581 (((
582
583 )))
584
585 (((
586 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
587 )))
588
589 (((
590 (% 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.
591 )))
592
593 (((
594
595 )))
596
597 (((
598 Add Datacake:
599 )))
600
601
602 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
603
604
605
606 Select default key as Access Key:
607
608
609 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
610
611
612 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
613
614
615 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
616
617
618 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
619
620
621
622 == 2.6 Datalog Feature ==
623
624
625 (((
626 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.
627 )))
628
629
630
631 === 2.6.1 Ways to get datalog via LoRaWAN ===
632
633
634 There are two methods:
635
636 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
637
638
639 (% 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.
640
641
642 (% style="color:red" %)**Note for method 2:**
643
644 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
645 * 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.
646
647 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
648
649
650 [[image:image-20220703111700-2.png||height="381" width="1119"]]
651
652
653
654 === 2.6.2 Unix TimeStamp ===
655
656
657 LHT65N uses Unix TimeStamp format based on
658
659
660 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
661
662
663
664 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
665
666 Below is the converter example
667
668 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
669
670 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
671
672
673
674 === 2.6.3 Set Device Time ===
675
676
677 (((
678 (% style="color:blue" %)**There are two ways to set device's time:**
679 )))
680
681 (((
682 **1.  Through LoRaWAN MAC Command (Default settings)**
683 )))
684
685 (((
686 User need to set SYNCMOD=1 to enable sync time via MAC command.
687 )))
688
689 (((
690 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).
691 )))
692
693 (((
694 (% 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.**
695 )))
696
697
698
699 (((
700 **2. Manually Set Time**
701 )))
702
703 (((
704 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
705 )))
706
707
708
709 === 2.6.4 Poll sensor value ===
710
711
712 User can poll sensor value based on timestamps from the server. Below is the downlink command.
713
714 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
715
716
717 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.
718
719 For example, downlink command **31 5FC5F350 5FC6 0160 05**
720
721 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
722
723 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
724
725
726
727 === 2.6.5 Datalog Uplink payload ===
728
729
730 The Datalog poll reply uplink will use below payload format.
731
732 **Retrieval data payload:**
733
734 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
735 |=(% style="width: 60px;" %)(((
736 **Size(bytes)**
737 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
738 |(% 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"]]
739
740 **Poll message flag & Ext:**
741
742 [[image:image-20221006192726-1.png||height="112" width="754"]]
743
744 (% 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)
745
746 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
747
748 * Poll Message Flag is set to 1.
749
750 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
751
752 For example, in US915 band, the max payload for different DR is:
753
754 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
755
756 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
757
758 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
759
760 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
761
762 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
763
764
765 **Example:**
766
767 If LHT65N has below data inside Flash:
768
769 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
770
771
772 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
773
774 Where : Start time: 60065F97 = time 21/1/19 04:27:03
775
776 Stop time: 60066DA7= time 21/1/19 05:27:03
777
778
779 **LHT65N will uplink this payload.**
780
781 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
782
783
784 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
785
786 Where the first 11 bytes is for the first entry:
787
788 7FFF089801464160065F97
789
790 Ext sensor data=0x7FFF/100=327.67
791
792 Temp=0x088E/100=22.00
793
794 Hum=0x014B/10=32.6
795
796 poll message flag & Ext=0x41,means reply data,Ext=1
797
798 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
799
800
801
802 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
803
804
805 (((
806 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.
807 )))
808
809 (((
810 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
811
812
813
814 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
815
816
817 **Internal GXHT30 temperature alarm**
818
819 (((
820 (% class="box infomessage" %)
821 (((
822 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
823
824 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
825
826 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
827
828 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
829
830 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
831
832 **AT+LEDALARM=1** :       Enable LED visual Alarm.
833 )))
834 )))
835
836 (% style="color:#4f81bd" %)**Downlink Command:**
837
838 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
839
840 AT+CITEMP=1 : A60001
841
842 AT+ARTEMP=1,60  :  A70001003C
843
844 AT+ARTEMP=-16,60 :  A7FFF0003C
845
846 AT+LEDALARM=1  :  3601
847
848
849 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
850
851 Total bytes: 8 bytes
852
853 **Example: **AA0100010001003C
854
855 WMOD=01
856
857 CITEMP=0001
858
859 TEMPlow=0001
860
861 TEMPhigh=003C
862
863
864 **DS18B20 and TMP117 Threshold Alarm**
865
866 **~ AT+WMOD=1,60,-10,20**
867
868 (% style="color:#4f81bd" %)**Downlink Command:**
869
870 **Example: **A5013CFC180014
871
872 MOD=01
873
874 CITEMP=3C(S)
875
876 TEMPlow=FC18
877
878 TEMPhigh=0014
879
880
881 **Fluctuation alarm for DS18B20 and TMP117**
882
883 **AT+WMOD=2,60,5** 
884
885 (% style="color:#4f81bd" %)**Downlink Command:**
886
887 **Example: **A5023C05
888
889 MOD=02
890
891 CITEMP=3C(S)
892
893 temperature fluctuation=05
894
895
896 ==== **Sampling multiple times and uplink together** ====
897
898 **AT+WMOD=3,1,60,20,-16,32,1**  ~/~/ Mode 3, the collection interval is 60s, the total number of collection is 20 times, and the data of these 20 times will be sent to the 20th time, with a maximum of 60 groups, the normal working temperature range is -16 to 32°C, 1 is to open the temperature alarm, 0 is to close the temperature alarm, and the temperature is turned on. After the alarm, if the temperature collected at the current time exceeds the normal working temperature, a data will be sent immediately.
899
900 (% style="color:#4f81bd" %)**Downlink Command:**
901
902 **Example: **A50301003C14FFF0002001
903
904 MOD=03
905
906 EXT=01
907
908 CITEMP=003C(S)
909
910 Total number of acquisitions=14
911
912 TEMPlow=FFF0
913
914 TEMPhigh=0020
915
916 ARTEMP=01
917
918
919 **Uplink payload( Fport=3)**
920
921 **Example: **CBEA0109920A4109C4
922
923 BatV=CBEA
924
925 EXT=01
926
927 Temp1=0992  ~/~/ 24.50℃
928
929 Temp2=0A41  ~/~/ 26.25℃
930
931 Temp3=09C4  ~/~/ 25.00℃
932
933
934 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
935
936 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
937
938 )))
939
940
941 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
942
943
944 (% _mstvisible="1" class="box infomessage" %)
945 (((
946 (((
947 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
948 )))
949
950 (((
951 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
952 )))
953
954 (((
955 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
956 )))
957
958 (((
959 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
960 )))
961
962 (((
963 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
964 )))
965 )))
966
967 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
968
969 Total bytes: 8 bytes
970
971 **Example:**AA0100010001003C
972
973 WMOD=01
974
975 CITEMP=0001
976
977 TEMPlow=0001
978
979 TEMPhigh=003C
980
981
982
983 == 2.8 LED Indicator ==
984
985
986 The LHT65 has a triple color LED which for easy showing different stage .
987
988 While user press ACT button, the LED will work as per LED status with ACT button.
989
990 In a normal working state:
991
992 * For each uplink, the BLUE LED or RED LED will blink once.
993 BLUE LED when external sensor is connected.
994 * RED LED when external sensor is not connected
995 * For each success downlink, the PURPLE LED will blink once
996
997
998
999
1000 == 2.9 installation ==
1001
1002
1003 (% _mstvisible="1" %)
1004 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
1005
1006
1007
1008 = 3. Sensors and Accessories =
1009
1010
1011 == 3.1 E2 Extension Cable ==
1012
1013
1014 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
1015
1016
1017 **1m long breakout cable for LHT65N. Features:**
1018
1019 * (((
1020 Use for AT Command， works for both LHT52/LHT65N
1021 )))
1022 * (((
1023 Update firmware for LHT65N, works for both LHT52/LHT65N
1024 )))
1025 * (((
1026 Supports ADC mode to monitor external ADC
1027 )))
1028 * (((
1029 Supports Interrupt mode
1030 )))
1031 * (((
1032 Exposed All pins from the LHT65N Type-C connector.
1033
1034
1035
1036 )))
1037
1038 [[image:image-20220619092421-3.png||height="371" width="529"]]
1039
1040
1041
1042
1043 == 3.2 E3 Temperature Probe ==
1044
1045
1046 [[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"]]
1047
1048
1049 Temperature sensor with 2 meters cable long
1050
1051 * Resolution: 0.0625 °C
1052 * ±0.5°C accuracy from -10°C to +85°C
1053 * ±2°C accuracy from -55°C to +125°C
1054 * Operating Range: -40 ~~ 125 °C
1055 * Working voltage 2.35v ~~ 5v
1056
1057
1058
1059
1060 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1061
1062
1063 (((
1064 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1065 )))
1066
1067 * (((
1068 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1069 )))
1070
1071 * (((
1072 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1073 )))
1074
1075 (((
1076 There are two kinds of commands to configure LHT65N, they are:
1077 )))
1078
1079 * (((
1080 (% style="color:#4f81bd" %)**General Commands**.
1081 )))
1082
1083 (((
1084 These commands are to configure:
1085 )))
1086
1087 1. (((
1088 General system settings like: uplink interval.
1089 )))
1090 1. (((
1091 LoRaWAN protocol & radio-related commands.
1092 )))
1093
1094 (((
1095 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]]
1096 )))
1097
1098 * (((
1099 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1100 )))
1101
1102 (((
1103 These commands are only valid for LHT65N, as below:
1104 )))
1105
1106
1107
1108 == 4.1 Set Transmit Interval Time ==
1109
1110
1111 Feature: Change LoRaWAN End Node Transmit Interval.
1112
1113
1114 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1115
1116 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1117
1118
1119 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1120
1121 Format: Command Code (0x01) followed by 3 bytes time value.
1122
1123 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1124
1125 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1126
1127 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1128
1129
1130
1131
1132 == 4.2 Set External Sensor Mode ==
1133
1134
1135 Feature: Change External Sensor Mode.
1136
1137
1138 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1139
1140 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1141
1142
1143 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1144
1145 Total bytes: 2 ~~ 5 bytes
1146
1147 **Example:**
1148
1149 * 0xA201: Set external sensor type to E1
1150
1151 * 0xA209: Same as AT+EXT=9
1152
1153 * 0xA20702003c: Same as AT+SETCNT=60
1154
1155
1156
1157
1158 == 4.3 Enable/Disable uplink Temperature probe ID ==
1159
1160
1161 (((
1162 Feature: If PID is enabled, device will send the temperature probe ID on:
1163 )))
1164
1165 * (((
1166 First Packet after OTAA Join
1167 )))
1168 * (((
1169 Every 24 hours since the first packet.
1170 )))
1171
1172 (((
1173 PID is default set to disable (0)
1174
1175
1176 )))
1177
1178 (% style="color:#4f81bd" %)**AT Command:**
1179
1180 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1181
1182
1183 (% style="color:#4f81bd" %)**Downlink Command:**
1184
1185 * **0xA800**  **~-~->** AT+PID=0
1186 * **0xA801**     **~-~->** AT+PID=1
1187
1188
1189
1190
1191 == 4.4 Set Password ==
1192
1193
1194 Feature: Set device password, max 9 digits
1195
1196
1197 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1198
1199 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1200
1201
1202 (% style="color:#4f81bd" %)**Downlink Command:**
1203
1204 No downlink command for this feature.
1205
1206
1207
1208 == 4.5 Quit AT Command ==
1209
1210
1211 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1212
1213
1214 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1215
1216 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1217
1218
1219 (% style="color:#4f81bd" %)**Downlink Command:**
1220
1221 No downlink command for this feature.
1222
1223
1224
1225 == 4.6 Set to sleep mode ==
1226
1227
1228 Feature: Set device to sleep mode
1229
1230 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1231 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1232
1233 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1234
1235 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1236
1237
1238 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1239
1240 * There is no downlink command to set to Sleep mode.
1241
1242
1243
1244
1245 == 4.7 Set system time ==
1246
1247
1248 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1249
1250
1251 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1252
1253 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1254
1255
1256 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1257
1258 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1259
1260
1261
1262 == 4.8 Set Time Sync Mode ==
1263
1264
1265 (((
1266 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1267 )))
1268
1269 (((
1270 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.
1271
1272
1273 )))
1274
1275 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1276
1277 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1278
1279
1280 (% style="color:#4f81bd" %)**Downlink Command:**
1281
1282 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1283 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1284
1285
1286
1287 == 4.9 Set Time Sync Interval ==
1288
1289
1290 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1291
1292
1293 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1294
1295 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1296
1297
1298 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1299
1300 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1301
1302
1303
1304 == 4.10 Print data entries base on page. ==
1305
1306
1307 Feature: Print the sector data from start page to stop page (max is 416 pages).
1308
1309
1310 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1311
1312 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1313
1314
1315 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1316
1317 No downlink commands for feature
1318
1319
1320
1321 == 4.11 Print last few data entries. ==
1322
1323
1324 Feature: Print the last few data entries
1325
1326
1327 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1328
1329 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1330
1331
1332 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1333
1334 No downlink commands for feature
1335
1336
1337
1338 == 4.12 Clear Flash Record ==
1339
1340
1341 Feature: Clear flash storage for data log feature.
1342
1343
1344 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1345
1346 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1347
1348
1349 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1350
1351 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1352
1353
1354
1355
1356 == 4.13 Auto Send None-ACK messages ==
1357
1358
1359 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.
1360
1361
1362 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1363
1364 The default factory setting is 0
1365
1366 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1367 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1368 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1369
1370 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1371
1372 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1373
1374
1375
1376
1377 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1378
1379
1380 Feature: Set internal and external temperature sensor alarms.
1381
1382 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1383 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1384 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1385
1386 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1387
1388 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1389
1390 0): Cancel
1391
1392 1): Threshold alarm
1393
1394 2): Fluctuation alarm
1395
1396
1397 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1398
1399 (% 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.**
1400
1401
1402 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1403
1404 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1405
1406 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1407
1408
1409 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.
1410
1411 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1412
1413 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1414
1415
1416 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1417
1418 0xA5 00 ~-~- AT+WMOD=0.
1419
1420 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 )
1421
1422 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))
1423
1424 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1425
1426 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.
1427
1428
1429
1430 = 5. Battery & How to replace =
1431
1432
1433 == 5.1 Battery Type ==
1434
1435
1436
1437 (((
1438 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.
1439 )))
1440
1441
1442
1443 (((
1444 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1445 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1446 )))
1447
1448 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1449
1450
1451
1452 == 5.2 Replace Battery ==
1453
1454
1455 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.
1456
1457 [[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"]]
1458
1459
1460
1461 == 5.3 Battery Life Analyze ==
1462
1463
1464 (((
1465 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:
1466 [[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]]
1467 )))
1468
1469
1470 (((
1471 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]]
1472 )))
1473
1474
1475
1476 = 6. FAQ =
1477
1478
1479 == 6.1 How to use AT Command? ==
1480
1481
1482 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.
1483
1484 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1485
1486
1487 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1488
1489 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1490 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1491 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1492
1493 (((
1494 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.
1495 )))
1496
1497
1498 Input password and ATZ to activate LHT65N,As shown below:
1499
1500 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1501
1502
1503 (% _msthash="506066" _msttexthash="544869" %)
1504 AT Command List is as below:
1505
1506 (% _msthash="506067" _msttexthash="361920" %)
1507 AT+<CMD>? :  Help on <CMD>
1508
1509 (% _msthash="506068" _msttexthash="243061" %)
1510 AT+<CMD> :  Run <CMD>
1511
1512 (% _msthash="506069" _msttexthash="704197" %)
1513 AT+<CMD>=<value> :  Set the value
1514
1515 (% _msthash="506070" _msttexthash="455676" %)
1516 AT+<CMD>=? :  Get the value
1517
1518 (% _msthash="506071" _msttexthash="670553" %)
1519 AT+DEBUG:  Set more info output
1520
1521 (% _msthash="506072" _msttexthash="485888" %)
1522 ATZ:  Trig a reset of the MCU
1523
1524 (% _msthash="506073" _msttexthash="2068872" %)
1525 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1526
1527 (% _msthash="506074" _msttexthash="689169" %)
1528 AT+DEUI:  Get or Set the Device EUI
1529
1530 (% _msthash="506075" _msttexthash="960414" %)
1531 AT+DADDR:  Get or Set the Device Address
1532
1533 (% _msthash="506076" _msttexthash="1079897" %)
1534 AT+APPKEY:  Get or Set the Application Key
1535
1536 (% _msthash="506077" _msttexthash="1326143" %)
1537 AT+NWKSKEY:  Get or Set the Network Session Key
1538
1539 (% _msthash="506078" _msttexthash="1573000" %)
1540 AT+APPSKEY:  Get or Set the Application Session Key
1541
1542 (% _msthash="506079" _msttexthash="1041729" %)
1543 AT+APPEUI:  Get or Set the Application EUI
1544
1545 (% _msthash="506080" _msttexthash="2104206" %)
1546 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1547
1548 (% _msthash="506081" _msttexthash="3369288" %)
1549 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1550
1551 (% _msthash="506082" _msttexthash="1894529" %)
1552 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1553
1554 (% _msthash="506083" _msttexthash="3864172" %)
1555 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1556
1557 (% _msthash="506084" _msttexthash="1712204" %)
1558 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1559
1560 (% _msthash="506085" _msttexthash="1281202" %)
1561 AT+RX2FQ:  Get or Set the Rx2 window frequency
1562
1563 (% _msthash="506086" _msttexthash="2796781" %)
1564 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1565
1566 (% _msthash="506087" _msttexthash="3285165" %)
1567 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1568
1569 (% _msthash="506088" _msttexthash="3286179" %)
1570 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1571
1572 (% _msthash="506089" _msttexthash="4703803" %)
1573 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1574
1575 (% _msthash="506090" _msttexthash="4704999" %)
1576 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1577
1578 (% _msthash="506091" _msttexthash="1528683" %)
1579 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1580
1581 (% _msthash="506092" _msttexthash="757185" %)
1582 AT+NWKID:  Get or Set the Network ID
1583
1584 (% _msthash="506093" _msttexthash="1156597" %)
1585 AT+FCU:  Get or Set the Frame Counter Uplink
1586
1587 (% _msthash="506094" _msttexthash="1273987" %)
1588 AT+FCD:  Get or Set the Frame Counter Downlink
1589
1590 (% _msthash="506095" _msttexthash="859222" %)
1591 AT+CLASS:  Get or Set the Device Class
1592
1593 (% _msthash="506096" _msttexthash="384852" %)
1594 AT+JOIN:  Join network
1595
1596 (% _msthash="506097" _msttexthash="548626" %)
1597 AT+NJS:  Get the join status
1598
1599 (% _msthash="506098" _msttexthash="2546206" %)
1600 AT+SENDB:  Send hexadecimal data along with the application port
1601
1602 (% _msthash="506099" _msttexthash="1932307" %)
1603 AT+SEND:  Send text data along with the application port
1604
1605 (% _msthash="506100" _msttexthash="3560557" %)
1606 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1607
1608 (% _msthash="506101" _msttexthash="1429701" %)
1609 AT+RECV:  Print last received data in raw format
1610
1611 (% _msthash="506102" _msttexthash="1735981" %)
1612 AT+VER:  Get current image version and Frequency Band
1613
1614 (% _msthash="506103" _msttexthash="1189474" %)
1615 AT+CFM:  Get or Set the confirmation mode (0-1)
1616
1617 (% _msthash="506104" _msttexthash="1718210" %)
1618 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1619
1620 (% _msthash="506105" _msttexthash="1339403" %)
1621 AT+SNR:  Get the SNR of the last received packet
1622
1623 (% _msthash="506106" _msttexthash="1452009" %)
1624 AT+RSSI:  Get the RSSI of the last received packet
1625
1626 (% _msthash="506107" _msttexthash="2768142" %)
1627 AT+TDC:  Get or set the application data transmission interval in ms
1628
1629 (% _msthash="506108" _msttexthash="1083914" %)
1630 AT+PORT:  Get or set the application port
1631
1632 (% _msthash="506109" _msttexthash="622440" %)
1633 AT+DISAT:  Disable AT commands
1634
1635 (% _msthash="506110" _msttexthash="868361" %)
1636 AT+PWORD: Set password, max 9 digits
1637
1638 (% _msthash="506111" _msttexthash="2210299" %)
1639 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1640
1641 (% _msthash="506112" _msttexthash="2113462" %)
1642 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1643
1644 (% _msthash="506113" _msttexthash="2087423" %)
1645 AT+PDTA:  Print the sector data from start page to stop page
1646
1647 (% _msthash="506114" _msttexthash="1063127" %)
1648 AT+PLDTA:  Print the last few sets of data
1649
1650 (% _msthash="506115" _msttexthash="1999426" %)
1651 AT+CLRDTA:  Clear the storage, record position back to 1st
1652
1653 (% _msthash="506116" _msttexthash="442130" %)
1654 AT+SLEEP:  Set sleep mode
1655
1656 (% _msthash="506117" _msttexthash="1080222" %)
1657 AT+EXT:  Get or Set external sensor model
1658
1659 (% _msthash="506118" _msttexthash="1309490" %)
1660 AT+BAT:  Get the current battery voltage in mV
1661
1662 (% _msthash="506119" _msttexthash="813891" %)
1663 AT+CFG:  Print all configurations
1664
1665 (% _msthash="506120" _msttexthash="551707" %)
1666 AT+WMOD:  Get or Set Work Mode
1667
1668 (% _msthash="506121" _msttexthash="2631499" %)
1669 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1670
1671 (% _msthash="506122" _msttexthash="3907150" %)
1672 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1673
1674 (% _msthash="506123" _msttexthash="854620" %)
1675 AT+SETCNT:  Set the count at present
1676
1677 (% _msthash="506124" _msttexthash="2554877" %)
1678 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1679
1680 (% _msthash="506125" _msttexthash="771849" %)
1681 AT+RPL:  Get or set response level
1682
1683 (% _msthash="506126" _msttexthash="1484314" %)
1684 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1685
1686 (% _msthash="506127" _msttexthash="741728" %)
1687 AT+LEAPSEC:  Get or Set Leap Second
1688
1689 (% _msthash="506128" _msttexthash="1694017" %)
1690 AT+SYNCMOD:  Get or Set time synchronization method
1691
1692 (% _msthash="506129" _msttexthash="2235948" %)
1693 AT+SYNCTDC:  Get or set time synchronization interval in day
1694
1695 (% _msthash="506130" _msttexthash="425542" %)
1696 AT+PID:  Get or set the PID
1697
1698
1699
1700 == 6.2 Where to use AT commands and Downlink commands ==
1701
1702
1703 **AT commands：**
1704
1705 [[image:image-20220620153708-1.png||height="603" width="723"]]
1706
1707
1708 **Downlink commands:**
1709
1710
1711
1712 (% style="color:blue" %)**TTN:**
1713
1714 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1715
1716
1717
1718 (% style="color:blue" %)**Helium：**
1719
1720 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1721
1722
1723
1724 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1725
1726
1727 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1728
1729
1730 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1731
1732
1733
1734 (% style="color:blue" %)**Aws:**
1735
1736 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1737
1738
1739
1740 == 6.3 How to change the uplink interval？ ==
1741
1742
1743 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);"]]
1744
1745
1746
1747 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1748
1749
1750 [[image:image-20220615153355-1.png]]
1751
1752 [[image:1655802313617-381.png]]
1753
1754
1755 (((
1756 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.
1757 )))
1758
1759
1760 Input password and ATZ to activate LHT65N,As shown below:
1761
1762 [[image:image-20220615154519-3.png||height="672" width="807"]]
1763
1764
1765
1766 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1767
1768
1769 [[image:image-20220615153355-1.png]]
1770
1771
1772 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1773
1774 [[image:image-20220615170542-5.png]]
1775
1776
1777
1778 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1779
1780 (% _msthash="506146" _msttexthash="52173160" %)
1781 First connect the four lines；(% style="display:none" %)
1782
1783 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1784
1785
1786 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1787
1788 [[image:image-20220621170938-2.png]]
1789
1790
1791
1792 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1793
1794 [[image:image-20220615171334-6.png]]
1795
1796
1797 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1798
1799
1800 When this interface appears, it indicates that the download has been completed.
1801
1802 [[image:image-20220620160723-8.png]]
1803
1804
1805 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1806
1807
1808
1809 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1810
1811
1812 [[image:image-20220623110706-1.png]]
1813
1814
1815 [[image:image-20220623112117-4.png||height="459" width="343"]]
1816
1817
1818 (((
1819 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.
1820 )))
1821
1822
1823 Input password and ATZ to activate LHT65N,As shown below:
1824
1825 [[image:image-20220615154519-3.png||height="672" width="807"]]
1826
1827
1828
1829 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1830
1831
1832 [[image:image-20220623110706-1.png]]
1833
1834
1835 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1836
1837 [[image:image-20220615170542-5.png]]
1838
1839
1840
1841 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1842
1843 (% _msthash="506146" _msttexthash="52173160" %)
1844 First connect the four lines；
1845
1846 (% _msthash="506146" _msttexthash="52173160" %)
1847 [[image:image-20220623113959-5.png||height="528" width="397"]]
1848
1849 (% _msthash="506146" _msttexthash="52173160" %)
1850 Press and hold the start key to restart and enter  (% _mstvisible="1" %)bootlaod(%%) mode.
1851
1852
1853
1854 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1855
1856 [[image:image-20220615171334-6.png]]
1857
1858
1859 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1860
1861
1862 When this interface appears, it indicates that the download has been completed.
1863
1864 [[image:image-20220620160723-8.png]]
1865
1866
1867 Finally,restart reset device again
1868
1869
1870
1871 = 7. Order Info =
1872
1873
1874 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1875
1876 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1877
1878 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1879 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1880 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1881 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1882 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1883 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1884 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1885 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1886
1887 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1888
1889 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1890
1891
1892
1893
1894 = 8. Packing Info =
1895
1896
1897 **Package Includes**:
1898
1899 * LHT65N Temperature & Humidity Sensor x 1
1900 * Optional external sensor
1901
1902 **Dimension and weight**:
1903
1904 * Device Size:  10 x 10 x 3.5 cm
1905 * Device Weight: 120.5g
1906
1907
1908
1909
1910 = 9. Reference material =
1911
1912
1913 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1914
1915
1916
1917
1918 = 10. FCC Warning =
1919
1920
1921 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1922
1923 (1) This device may not cause harmful interference；
1924
1925 (2) this device must accept any interference received, including interference that may cause undesired operation.
1926
1927
1928