Skip to Content
Version 223.1 by Bei Jinggeng on 2022/11/28 17:20
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
5
6
7
8 (% _mstvisible="1" %)
9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
10
11 {{toc/}}
12
13
14
15
16
17 = 1. Introduction =
18
19 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
20
21
22 (((
23 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
24 )))
25
26 (((
27 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
28 )))
29
30 (((
31 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
32 )))
33
34 (((
35 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
36 )))
37
38 (((
39 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
40 )))
41
42 (((
43 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
44 )))
45
46
47
48 == 1.2 Features ==
49
50
51 * Wall mountable
52 * LoRaWAN v1.0.3 Class A protocol
53 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
54 * AT Commands to change parameters
55 * Remote configure parameters via LoRaWAN Downlink
56 * Firmware upgradeable via program port
57 * Built-in 2400mAh battery for up to 10 years of use.
58 * Built-in Temperature & Humidity sensor
59 * Optional External Sensors
60 * Tri-color LED to indicate working status
61 * Datalog feature (Max 3328 records)
62
63
64 == 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 = 2. Connect LHT65N to IoT Server =
90
91 == 2.1 How does LHT65N work? ==
92
93
94 (((
95 LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
96 )))
97
98 (((
99 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
100 )))
101
102
103 == 2.2 How to Activate LHT65N? ==
104
105
106 (((
107 The LHT65N has two working modes:
108 )))
109
110 * (((
111 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
112 )))
113 * (((
114 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
115 )))
116
117 (((
118 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
119 )))
120
121
122 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
123
124 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
125
126
127 == 2.3 Example to join LoRaWAN network ==
128
129
130 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
131 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
132
133
134 (% _mstvisible="1" class="wikigeneratedid" %)
135 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
136
137
138 (((
139 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
140 )))
141
142
143
144 === 2.3.1 Step 1: Create Device n TTN ===
145
146
147 (((
148 Create a device in TTN V3 with the OTAA keys from LHT65N.
149 )))
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"]]
166
167
168 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
169
170
171
172 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
173
174
175 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
176
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
185 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
186
187
188 (((
189 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.
190 )))
191
192 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
193
194
195 == 2.4 Uplink Payload   ( Fport~=2) ==
196
197
198 (((
199 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.
200 )))
201
202 (((
203 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
204 )))
205
206 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
207 |=(% style="width: 60px;" %)(((
208 **Size(bytes)**
209 )))|=(% style="width: 30px;" %)(((
210 **2**
211 )))|=(% style="width: 100px;" %)(((
212 **2**
213 )))|=(% style="width: 100px;" %)(((
214 **2**
215 )))|=(% style="width: 50px;" %)(((
216 **1**
217 )))|=(% style="width: 50px;" %)(((
218 **4**
219 )))
220 |(% style="width:97px" %)(((
221 **Value**
222 )))|(% style="width:39px" %)(((
223 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
224 )))|(% style="width:100px" %)(((
225 (((
226 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
227 )))
228 )))|(% style="width:77px" %)(((
229 (((
230 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
231 )))
232 )))|(% style="width:47px" %)(((
233 [[Ext>>||anchor="H2.4.5Ext23"]] #
234 )))|(% style="width:51px" %)(((
235 [[Ext value>>||anchor="H2.4.6Extvalue"]]
236 )))
237
238 * The First 6 bytes: has fix meanings for every LHT65N.
239 * The 7th byte (EXT #): defines the external sensor model.
240 * 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.)
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
255 === 2.4.2 BAT-Battery Info ===
256
257
258 These two bytes of BAT include the battery state and the actually voltage
259
260 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
261
262
263 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
264
265
266 Check the battery voltage for LHT65N.
267
268 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
269 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
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"]]
276
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 === 2.4.4 Built-in Humidity ===
285
286
287 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
288
289 * Humidity:    0x025C/10=60.4%
290
291
292 === 2.4.5 Ext # ===
293
294
295 Bytes for External Sensor:
296
297 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
298
299
300 === 2.4.6 Ext value ===
301
302 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
303
304
305 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
306
307
308 * DS18B20 temp=0x0ADD/100=27.81℃
309
310 The last 2 bytes of data are meaningless
311
312
313
314 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
315
316
317 * External temperature= (0xF54F-65536)/100=-27.37℃
318
319 The last 2 bytes of data are meaningless
320
321 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
322
323
324
325 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
326
327
328 (((
329 Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
330 )))
331
332 (((
333
334 )))
335
336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
337 |=(% style="width: 50px;" %)(((
338 **Size(bytes)**
339 )))|=(% style="width: 70px;" %)(((
340 **2**
341 )))|=(% style="width: 120px;" %)(((
342 **2**
343 )))|=(% style="width: 120px;" %)(((
344 **2**
345 )))|=(% style="width: 50px;" %)(((
346 **1**
347 )))|=(% style="width: 70px;" %)(((
348 **4**
349 )))
350 |(% style="width:110px" %)(((
351 **Value**
352 )))|(% style="width:71px" %)(((
353 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
354 )))|(% style="width:99px" %)(((
355 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
356 )))|(% style="width:132px" %)(((
357 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
358 )))|(% style="width:54px" %)(((
359 Status & Ext
360 )))|(% style="width:64px" %)(((
361 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
362 )))
363
364 * **Battery status & Built-in Humidity**
365
366 (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
367 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
368 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
369 BAT Status
370 00(b): Ultra Low ( BAT <= 2.50v)
371 01(b): Low  (2.50v <=BAT <= 2.55v)
372 10(b): OK   (2.55v <= BAT <=2.65v)
373 11(b): Good   (BAT >= 2.65v)
374 )))|(% style="width:132px" %)(((
375 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
376 )))
377
378 * **Status & Ext Byte**
379
380 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
381 |=(% scope="row" style="width: 60px;" %)**Bits**|(% style="width:90px" %)**7**|(% style="width:100px" %)**6**|(% style="width:90px" %)**5**|(% style="width:100px" %)**4**|(% style="width:60px" %)**[3:0]**
382 |=(% style="width: 96px;" %)**Status&Ext**|(% style="width:124px" %)None-ACK Flag|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
383
384 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
385 * (% style="color:blue" %)**Sync time OK**: (%%) 1: Set time ok，0: N/A. After time SYNC request is sent, LHT65N will set this bit to 0 until got the time stamp from the application server.
386 * (% style="color:blue" %)**Unix Time Request**:(%%)  1: Request server downlink Unix time, 0 : N/A. In this mode, LHT65N will set this bit to 1 every 10 days to request a time SYNC. (AT+SYNCMOD to set this)
387
388
389 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
390
391
392 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
393
394 be used to power the external ADC sensor; user can control the power on time for this
395
396 (% style="color:blue" %)**sensor by setting:**
397
398 **AT+EXT=6,timeout**  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
399
400 **For example:**
401
402 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
403
404
405 Or use **downlink command A2** to set the same.
406
407 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
408
409 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.
410
411 [[image:image-20220628150112-1.png||height="241" width="285"]]
412
413
414 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
415
416 [[image:image-20220628150714-4.png]]
417
418
419 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.
420
421
422 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
423
424 [[image:image-20220628151005-5.png]]
425
426
427 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
428
429 [[image:image-20220628151056-6.png]]
430
431
432 3) Within range
433
434 [[image:image-20220628151143-7.png]]
435
436
437
438 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
439
440
441 [[image:image-20220927095645-1.png||height="534" width="460"]]
442
443
444 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
445
446 [[image:image-20220906102307-7.png]]
447
448
449 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
450
451 The external cable NE2 can be use for MOD4 and MOD8
452
453
454
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
502 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
503
504
505 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
506
507
508 (% 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.
509
510 [[image:image-20220906101320-4.png||height="366" width="698"]]
511
512
513 (% 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
514
515 [[image:image-20220906101320-5.png||height="353" width="696"]]
516
517
518 Ext=8, Counting Sensor ( 4 bytes)：
519
520 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
521 |(% style="width:138px" %)(((
522 AT+EXT=8,0
523 )))|(% style="width:240px" %)(((
524 Count at falling interrupt
525 )))
526 |(% style="width:138px" %)(((
527 AT+EXT=8,1
528 )))|(% style="width:240px" %)(((
529 Count at rising interrupt
530 )))
531 |(% style="width:138px" %)(((
532 AT+SETCNT=60
533 )))|(% style="width:240px" %)(((
534 Sent current count to 60
535 )))
536
537 [[image:image-20220906101320-6.png]]
538
539
540 (% style="color:blue" %)**A2 downlink Command：**
541
542 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
543
544 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
545
546 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
547
548 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
549
550 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)
551
552
553
554 == 2.5 Show data on Datacake ==
555
556
557 (((
558 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:
559 )))
560
561 (((
562
563 )))
564
565 (((
566 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
567 )))
568
569 (((
570 (% 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.
571 )))
572
573 (((
574
575 )))
576
577 (((
578 Add Datacake:
579 )))
580
581
582 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
583
584
585
586 Select default key as Access Key:
587
588
589 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
590
591
592 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
593
594
595 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
596
597
598 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
599
600
601 == 2.6 Datalog Feature ==
602
603
604 (((
605 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.
606 )))
607
608
609 === 2.6.1 Ways to get datalog via LoRaWAN ===
610
611
612 There are two methods:
613
614 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
615
616
617 (% 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.
618
619
620 (% style="color:red" %)**Note for method 2:**
621
622 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
623 * 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.
624
625 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
626
627
628 [[image:image-20220703111700-2.png||height="381" width="1119"]]
629
630
631 === 2.6.2 Unix TimeStamp ===
632
633
634 LHT65N uses Unix TimeStamp format based on
635
636
637 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
638
639
640
641 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
642
643 Below is the converter example
644
645 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
646
647
648 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
649
650
651 === 2.6.3 Set Device Time ===
652
653
654 (((
655 (% style="color:blue" %)**There are two ways to set device's time:**
656 )))
657
658 (((
659 **1.  Through LoRaWAN MAC Command (Default settings)**
660 )))
661
662 (((
663 User need to set SYNCMOD=1 to enable sync time via MAC command.
664 )))
665
666 (((
667 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).
668 )))
669
670 (((
671 (% 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.**
672 )))
673
674
675
676 (((
677 **2. Manually Set Time**
678 )))
679
680 (((
681 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
682 )))
683
684
685
686 === 2.6.4 Poll sensor value ===
687
688
689 User can poll sensor value based on timestamps from the server. Below is the downlink command.
690
691 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
692
693
694 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.
695
696 For example, downlink command **31 5FC5F350 5FC6 0160 05**
697
698 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
699
700 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
701
702
703
704 === 2.6.5 Datalog Uplink payload ===
705
706
707 The Datalog poll reply uplink will use below payload format.
708
709 **Retrieval data payload:**
710
711 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
712 |=(% style="width: 60px;" %)(((
713 **Size(bytes)**
714 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
715 |(% 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"]]
716
717 **Poll message flag & Ext:**
718
719 [[image:image-20221006192726-1.png||height="112" width="754"]]
720
721 (% 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)
722
723 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
724
725 * Poll Message Flag is set to 1.
726
727 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
728
729 For example, in US915 band, the max payload for different DR is:
730
731 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
732
733 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
734
735 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
736
737 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
738
739 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
740
741
742 **Example:**
743
744 If LHT65N has below data inside Flash:
745
746 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
747
748
749 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
750
751 Where : Start time: 60065F97 = time 21/1/19 04:27:03
752
753 Stop time: 60066DA7= time 21/1/19 05:27:03
754
755
756 **LHT65N will uplink this payload.**
757
758 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
759
760
761 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
762
763 Where the first 11 bytes is for the first entry:
764
765 7FFF089801464160065F97
766
767 Ext sensor data=0x7FFF/100=327.67
768
769 Temp=0x088E/100=22.00
770
771 Hum=0x014B/10=32.6
772
773 poll message flag & Ext=0x41,means reply data,Ext=1
774
775 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
776
777
778 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
779
780
781 (((
782 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.
783 )))
784
785 (((
786 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
787
788
789 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
790
791
792 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
793
794 (((
795 (% class="box infomessage" %)
796 (((
797 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
798
799 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
800
801 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
802
803 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
804
805 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
806
807 **AT+LEDALARM=1** :       Enable LED visual Alarm.
808 )))
809 )))
810
811 (% style="color:#4f81bd" %)**Downlink Command:**
812
813 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
814
815 AT+CITEMP=1 : A60001
816
817 AT+ARTEMP=1,60  :  A70001003C
818
819 AT+ARTEMP=-16,60 :  A7FFF0003C
820
821 AT+LEDALARM=1  :  3601
822
823
824 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
825
826 Total bytes: 8 bytes
827
828 **Example: **AA0100010001003C
829
830 WMOD=01
831
832 CITEMP=0001
833
834 TEMPlow=0001
835
836 TEMPhigh=003C
837
838
839 **DS18B20 and TMP117 Threshold Alarm**
840
841 **~ AT+WMOD=1,60,-10,20**
842
843 (% style="color:#4f81bd" %)**Downlink Command:**
844
845 **Example: **A5013CFC180014
846
847 MOD=01
848
849 CITEMP=3C(S)
850
851 TEMPlow=FC18
852
853 TEMPhigh=0014
854
855
856 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
857
858 **AT+WMOD=2,60,5** 
859
860 (% style="color:#4f81bd" %)**Downlink Command:**
861
862 **Example: **A5023C05
863
864 MOD=02
865
866 CITEMP=3C(S)
867
868 temperature fluctuation=05
869
870
871 ==== **Sampling multiple times and uplink together** ====
872
873 **AT+WMOD=3,1,60,20,-16,32,1**   
874
875 Explain:
876
877 * Set Working Mode to **Mode 3**
878 * Sampling Interval is **60**s.
879 * 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)
880 * Temperature alarm range is **-16** to **32**°C,
881 * **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.
882
883 (% style="color:#4f81bd" %)**Downlink Command:**
884
885 **Example: **A50301003C14FFF0002001
886
887 MOD=03
888
889 EXT=01
890
891 CITEMP=003C(S)
892
893 Total number of acquisitions=14
894
895 TEMPlow=FFF0
896
897 TEMPhigh=0020
898
899 ARTEMP=01
900
901
902 **Uplink payload( Fport=3)**
903
904 **Example: CBEA**01**0992**//0A41//**09C4**
905
906 BatV=CBEA
907
908 EXT=01
909
910 Temp1=0992  ~/~/ 24.50℃
911
912 Temp2=0A41  ~/~/ 26.25℃
913
914 Temp3=09C4  ~/~/ 25.00℃
915
916
917 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
918
919 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
920 )))
921
922
923 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
924
925
926 (% _mstvisible="1" class="box infomessage" %)
927 (((
928 (((
929 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
930 )))
931
932 (((
933 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
934 )))
935
936 (((
937 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
938 )))
939
940 (((
941 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
942 )))
943
944 (((
945 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
946 )))
947 )))
948
949 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
950
951 Total bytes: 8 bytes
952
953 **Example:**AA0100010001003C
954
955 WMOD=01
956
957 CITEMP=0001
958
959 TEMPlow=0001
960
961 TEMPhigh=003C
962
963
964 == 2.8 LED Indicator ==
965
966
967 The LHT65 has a triple color LED which for easy showing different stage .
968
969 While user press ACT button, the LED will work as per LED status with ACT button.
970
971 In a normal working state:
972
973 * For each uplink, the BLUE LED or RED LED will blink once.
974 BLUE LED when external sensor is connected.
975 * RED LED when external sensor is not connected
976 * For each success downlink, the PURPLE LED will blink once
977
978
979 == 2.9 installation ==
980
981
982 (% _mstvisible="1" %)
983 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
984
985
986
987 = 3. Sensors and Accessories =
988
989 == 3.1 E2 Extension Cable ==
990
991
992 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
993
994
995 **1m long breakout cable for LHT65N. Features:**
996
997 * (((
998 Use for AT Command， works for both LHT52/LHT65N
999 )))
1000 * (((
1001 Update firmware for LHT65N, works for both LHT52/LHT65N
1002 )))
1003 * (((
1004 Supports ADC mode to monitor external ADC
1005 )))
1006 * (((
1007 Supports Interrupt mode
1008 )))
1009 * (((
1010 Exposed All pins from the LHT65N Type-C connector.
1011
1012
1013
1014 )))
1015
1016 [[image:image-20220619092421-3.png||height="371" width="529"]]
1017
1018
1019 == 3.2 E3 Temperature Probe ==
1020
1021
1022 [[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"]]
1023
1024
1025 Temperature sensor with 2 meters cable long
1026
1027 * Resolution: 0.0625 °C
1028 * ±0.5°C accuracy from -10°C to +85°C
1029 * ±2°C accuracy from -55°C to +125°C
1030 * Operating Range: -40 ~~ 125 °C
1031 * Working voltage 2.35v ~~ 5v
1032
1033
1034 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1035
1036
1037 (((
1038 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1039 )))
1040
1041 * (((
1042 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1043 )))
1044
1045 * (((
1046 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1047 )))
1048
1049 (((
1050 There are two kinds of commands to configure LHT65N, they are:
1051 )))
1052
1053 * (((
1054 (% style="color:#4f81bd" %)**General Commands**.
1055 )))
1056
1057 (((
1058 These commands are to configure:
1059 )))
1060
1061 1. (((
1062 General system settings like: uplink interval.
1063 )))
1064 1. (((
1065 LoRaWAN protocol & radio-related commands.
1066 )))
1067
1068 (((
1069 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]]
1070 )))
1071
1072 * (((
1073 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1074 )))
1075
1076 (((
1077 These commands are only valid for LHT65N, as below:
1078 )))
1079
1080
1081 == 4.1 Set Transmit Interval Time ==
1082
1083
1084 Feature: Change LoRaWAN End Node Transmit Interval.
1085
1086
1087 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1088
1089 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1090
1091
1092 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1093
1094 Format: Command Code (0x01) followed by 3 bytes time value.
1095
1096 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1097
1098 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1099
1100 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1101
1102
1103 == 4.2 Set External Sensor Mode ==
1104
1105
1106 Feature: Change External Sensor Mode.
1107
1108
1109 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1110
1111 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1112
1113
1114 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1115
1116 Total bytes: 2 ~~ 5 bytes
1117
1118 **Example:**
1119
1120 * 0xA201: Set external sensor type to E1
1121
1122 * 0xA209: Same as AT+EXT=9
1123
1124 * 0xA20702003c: Same as AT+SETCNT=60
1125
1126
1127 == 4.3 Enable/Disable uplink Temperature probe ID ==
1128
1129
1130 (((
1131 Feature: If PID is enabled, device will send the temperature probe ID on:
1132 )))
1133
1134 * (((
1135 First Packet after OTAA Join
1136 )))
1137 * (((
1138 Every 24 hours since the first packet.
1139 )))
1140
1141 (((
1142 PID is default set to disable (0)
1143
1144
1145 )))
1146
1147 (% style="color:#4f81bd" %)**AT Command:**
1148
1149 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1150
1151
1152 (% style="color:#4f81bd" %)**Downlink Command:**
1153
1154 * **0xA800**  **~-~->** AT+PID=0
1155 * **0xA801**     **~-~->** AT+PID=1
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 == 4.7 Set system time ==
1209
1210
1211 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1212
1213
1214 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1215
1216 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1217
1218
1219 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1220
1221 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1222
1223
1224 == 4.8 Set Time Sync Mode ==
1225
1226
1227 (((
1228 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1229 )))
1230
1231 (((
1232 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.
1233
1234
1235 )))
1236
1237 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1238
1239 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1240
1241
1242 (% style="color:#4f81bd" %)**Downlink Command:**
1243
1244 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1245 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1246
1247
1248 == 4.9 Set Time Sync Interval ==
1249
1250
1251 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1252
1253
1254 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1255
1256 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1257
1258
1259 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1260
1261 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1262
1263
1264 == 4.10 Print data entries base on page. ==
1265
1266
1267 Feature: Print the sector data from start page to stop page (max is 416 pages).
1268
1269
1270 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1271
1272 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1273
1274
1275 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1276
1277 No downlink commands for feature
1278
1279
1280 == 4.11 Print last few data entries. ==
1281
1282
1283 Feature: Print the last few data entries
1284
1285
1286 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1287
1288 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1289
1290
1291 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1292
1293 No downlink commands for feature
1294
1295
1296 == 4.12 Clear Flash Record ==
1297
1298
1299 Feature: Clear flash storage for data log feature.
1300
1301
1302 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1303
1304 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1305
1306
1307 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1308
1309 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1310
1311
1312 == 4.13 Auto Send None-ACK messages ==
1313
1314
1315 Feature: LHT65N will wait for ACK for each uplink, If LHT65N doesn't get ACK from the IoT server, it will consider the message doesn't arrive server and store it. LHT65N keeps sending messages in normal periodically. Once LHT65N gets ACK from a server, it will consider the network is ok and start to send the not-arrive message.
1316
1317
1318 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1319
1320 The default factory setting is 0
1321
1322 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1323 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1324 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1325
1326 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1327
1328 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1329
1330
1331 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1332
1333
1334 Feature: Set internal and external temperature sensor alarms.
1335
1336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1337 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1338 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1339
1340 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1341
1342 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1343
1344 0): Cancel
1345
1346 1): Threshold alarm
1347
1348 2): Fluctuation alarm
1349
1350
1351 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1352
1353 (% 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.**
1354
1355
1356 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1357
1358 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1359
1360 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1361
1362
1363 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.
1364
1365 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1366
1367 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1368
1369
1370 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1371
1372 0xA5 00 ~-~- AT+WMOD=0.
1373
1374 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 )
1375
1376 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))
1377
1378 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1379
1380 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.
1381
1382
1383 = 5. Battery & How to replace =
1384
1385 == 5.1 Battery Type ==
1386
1387
1388 (((
1389 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.
1390 )))
1391
1392 (((
1393 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1394
1395
1396 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1397 )))
1398
1399 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1400
1401
1402 == 5.2 Replace Battery ==
1403
1404
1405 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.
1406
1407 [[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"]]
1408
1409
1410 == 5.3 Battery Life Analyze ==
1411
1412
1413 (((
1414 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:
1415 [[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]]
1416 )))
1417
1418
1419 (((
1420 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]]
1421 )))
1422
1423
1424 = 6. FAQ =
1425
1426 == 6.1 How to use AT Command? ==
1427
1428
1429 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.
1430
1431 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1432
1433
1434 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1435
1436 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1437 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1438 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1439
1440 (((
1441 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.
1442 )))
1443
1444
1445 Input password and ATZ to activate LHT65N,As shown below:
1446
1447 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1448
1449
1450 (% _msthash="506066" _msttexthash="544869" %)
1451 AT Command List is as below:
1452
1453 (% _msthash="506067" _msttexthash="361920" %)
1454 AT+<CMD>? :  Help on <CMD>
1455
1456 (% _msthash="506068" _msttexthash="243061" %)
1457 AT+<CMD> :  Run <CMD>
1458
1459 (% _msthash="506069" _msttexthash="704197" %)
1460 AT+<CMD>=<value> :  Set the value
1461
1462 (% _msthash="506070" _msttexthash="455676" %)
1463 AT+<CMD>=? :  Get the value
1464
1465 (% _msthash="506071" _msttexthash="670553" %)
1466 AT+DEBUG:  Set more info output
1467
1468 (% _msthash="506072" _msttexthash="485888" %)
1469 ATZ:  Trig a reset of the MCU
1470
1471 (% _msthash="506073" _msttexthash="2068872" %)
1472 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1473
1474 (% _msthash="506074" _msttexthash="689169" %)
1475 AT+DEUI:  Get or Set the Device EUI
1476
1477 (% _msthash="506075" _msttexthash="960414" %)
1478 AT+DADDR:  Get or Set the Device Address
1479
1480 (% _msthash="506076" _msttexthash="1079897" %)
1481 AT+APPKEY:  Get or Set the Application Key
1482
1483 (% _msthash="506077" _msttexthash="1326143" %)
1484 AT+NWKSKEY:  Get or Set the Network Session Key
1485
1486 (% _msthash="506078" _msttexthash="1573000" %)
1487 AT+APPSKEY:  Get or Set the Application Session Key
1488
1489 (% _msthash="506079" _msttexthash="1041729" %)
1490 AT+APPEUI:  Get or Set the Application EUI
1491
1492 (% _msthash="506080" _msttexthash="2104206" %)
1493 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1494
1495 (% _msthash="506081" _msttexthash="3369288" %)
1496 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1497
1498 (% _msthash="506082" _msttexthash="1894529" %)
1499 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1500
1501 (% _msthash="506083" _msttexthash="3864172" %)
1502 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1503
1504 (% _msthash="506084" _msttexthash="1712204" %)
1505 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1506
1507 (% _msthash="506085" _msttexthash="1281202" %)
1508 AT+RX2FQ:  Get or Set the Rx2 window frequency
1509
1510 (% _msthash="506086" _msttexthash="2796781" %)
1511 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1512
1513 (% _msthash="506087" _msttexthash="3285165" %)
1514 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1515
1516 (% _msthash="506088" _msttexthash="3286179" %)
1517 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1518
1519 (% _msthash="506089" _msttexthash="4703803" %)
1520 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1521
1522 (% _msthash="506090" _msttexthash="4704999" %)
1523 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1524
1525 (% _msthash="506091" _msttexthash="1528683" %)
1526 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1527
1528 (% _msthash="506092" _msttexthash="757185" %)
1529 AT+NWKID:  Get or Set the Network ID
1530
1531 (% _msthash="506093" _msttexthash="1156597" %)
1532 AT+FCU:  Get or Set the Frame Counter Uplink
1533
1534 (% _msthash="506094" _msttexthash="1273987" %)
1535 AT+FCD:  Get or Set the Frame Counter Downlink
1536
1537 (% _msthash="506095" _msttexthash="859222" %)
1538 AT+CLASS:  Get or Set the Device Class
1539
1540 (% _msthash="506096" _msttexthash="384852" %)
1541 AT+JOIN:  Join network
1542
1543 (% _msthash="506097" _msttexthash="548626" %)
1544 AT+NJS:  Get the join status
1545
1546 (% _msthash="506098" _msttexthash="2546206" %)
1547 AT+SENDB:  Send hexadecimal data along with the application port
1548
1549 (% _msthash="506099" _msttexthash="1932307" %)
1550 AT+SEND:  Send text data along with the application port
1551
1552 (% _msthash="506100" _msttexthash="3560557" %)
1553 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1554
1555 (% _msthash="506101" _msttexthash="1429701" %)
1556 AT+RECV:  Print last received data in raw format
1557
1558 (% _msthash="506102" _msttexthash="1735981" %)
1559 AT+VER:  Get current image version and Frequency Band
1560
1561 (% _msthash="506103" _msttexthash="1189474" %)
1562 AT+CFM:  Get or Set the confirmation mode (0-1)
1563
1564 (% _msthash="506104" _msttexthash="1718210" %)
1565 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1566
1567 (% _msthash="506105" _msttexthash="1339403" %)
1568 AT+SNR:  Get the SNR of the last received packet
1569
1570 (% _msthash="506106" _msttexthash="1452009" %)
1571 AT+RSSI:  Get the RSSI of the last received packet
1572
1573 (% _msthash="506107" _msttexthash="2768142" %)
1574 AT+TDC:  Get or set the application data transmission interval in ms
1575
1576 (% _msthash="506108" _msttexthash="1083914" %)
1577 AT+PORT:  Get or set the application port
1578
1579 (% _msthash="506109" _msttexthash="622440" %)
1580 AT+DISAT:  Disable AT commands
1581
1582 (% _msthash="506110" _msttexthash="868361" %)
1583 AT+PWORD: Set password, max 9 digits
1584
1585 (% _msthash="506111" _msttexthash="2210299" %)
1586 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1587
1588 (% _msthash="506112" _msttexthash="2113462" %)
1589 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1590
1591 (% _msthash="506113" _msttexthash="2087423" %)
1592 AT+PDTA:  Print the sector data from start page to stop page
1593
1594 (% _msthash="506114" _msttexthash="1063127" %)
1595 AT+PLDTA:  Print the last few sets of data
1596
1597 (% _msthash="506115" _msttexthash="1999426" %)
1598 AT+CLRDTA:  Clear the storage, record position back to 1st
1599
1600 (% _msthash="506116" _msttexthash="442130" %)
1601 AT+SLEEP:  Set sleep mode
1602
1603 (% _msthash="506117" _msttexthash="1080222" %)
1604 AT+EXT:  Get or Set external sensor model
1605
1606 (% _msthash="506118" _msttexthash="1309490" %)
1607 AT+BAT:  Get the current battery voltage in mV
1608
1609 (% _msthash="506119" _msttexthash="813891" %)
1610 AT+CFG:  Print all configurations
1611
1612 (% _msthash="506120" _msttexthash="551707" %)
1613 AT+WMOD:  Get or Set Work Mode
1614
1615 (% _msthash="506121" _msttexthash="2631499" %)
1616 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1617
1618 (% _msthash="506122" _msttexthash="3907150" %)
1619 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1620
1621 (% _msthash="506123" _msttexthash="854620" %)
1622 AT+SETCNT:  Set the count at present
1623
1624 (% _msthash="506124" _msttexthash="2554877" %)
1625 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1626
1627 (% _msthash="506125" _msttexthash="771849" %)
1628 AT+RPL:  Get or set response level
1629
1630 (% _msthash="506126" _msttexthash="1484314" %)
1631 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1632
1633 (% _msthash="506127" _msttexthash="741728" %)
1634 AT+LEAPSEC:  Get or Set Leap Second
1635
1636 (% _msthash="506128" _msttexthash="1694017" %)
1637 AT+SYNCMOD:  Get or Set time synchronization method
1638
1639 (% _msthash="506129" _msttexthash="2235948" %)
1640 AT+SYNCTDC:  Get or set time synchronization interval in day
1641
1642 (% _msthash="506130" _msttexthash="425542" %)
1643 AT+PID:  Get or set the PID
1644
1645
1646 == 6.2 Where to use AT commands and Downlink commands ==
1647
1648
1649 **AT commands：**
1650
1651 [[image:image-20220620153708-1.png||height="603" width="723"]]
1652
1653
1654 **Downlink commands:**
1655
1656
1657
1658 (% style="color:blue" %)**TTN:**
1659
1660 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1661
1662
1663
1664 (% style="color:blue" %)**Helium：**
1665
1666 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1667
1668
1669
1670 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1671
1672
1673 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1674
1675
1676 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1677
1678
1679
1680 (% style="color:blue" %)**Aws:**
1681
1682 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1683
1684
1685 == 6.3 How to change the uplink interval？ ==
1686
1687
1688 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);"]]
1689
1690
1691 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1692
1693
1694 [[image:image-20220615153355-1.png]]
1695
1696 [[image:1655802313617-381.png]]
1697
1698
1699 (((
1700 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.
1701 )))
1702
1703
1704 Input password and ATZ to activate LHT65N,As shown below:
1705
1706 [[image:image-20220615154519-3.png||height="672" width="807"]]
1707
1708
1709 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1710
1711
1712 [[image:image-20220615153355-1.png]]
1713
1714
1715 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1716
1717 [[image:image-20220615170542-5.png]]
1718
1719
1720
1721 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1722
1723 (% _msthash="506146" _msttexthash="52173160" %)
1724 First connect the four lines；(% style="display:none" %)
1725
1726 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1727
1728
1729 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1730
1731 [[image:image-20220621170938-2.png]]
1732
1733
1734
1735 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1736
1737 [[image:image-20220615171334-6.png]]
1738
1739
1740 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1741
1742
1743 When this interface appears, it indicates that the download has been completed.
1744
1745 [[image:image-20220620160723-8.png]]
1746
1747
1748 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1749
1750
1751 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1752
1753
1754 [[image:image-20220623110706-1.png]]
1755
1756
1757 [[image:image-20220623112117-4.png||height="459" width="343"]]
1758
1759
1760 (((
1761 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.
1762 )))
1763
1764
1765 Input password and ATZ to activate LHT65N,As shown below:
1766
1767 [[image:image-20220615154519-3.png||height="672" width="807"]]
1768
1769
1770 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1771
1772
1773 [[image:image-20220623110706-1.png]]
1774
1775
1776 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1777
1778 [[image:image-20220615170542-5.png]]
1779
1780
1781
1782 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1783
1784 (% _msthash="506146" _msttexthash="52173160" %)
1785 First connect the four lines；
1786
1787 (% _msthash="506146" _msttexthash="52173160" %)
1788 [[image:image-20220623113959-5.png||height="528" width="397"]]
1789
1790 (% _msthash="506146" _msttexthash="52173160" %)
1791 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1792
1793
1794
1795 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1796
1797 [[image:image-20220615171334-6.png]]
1798
1799
1800 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1801
1802
1803 When this interface appears, it indicates that the download has been completed.
1804
1805 [[image:image-20220620160723-8.png]]
1806
1807
1808 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1809
1810
1811 = 7. Order Info =
1812
1813
1814 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1815
1816 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1817
1818 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1819 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1820 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1821 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1822 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1823 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1824 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1825 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1826
1827 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1828
1829 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1830
1831
1832 = 8. Packing Info =
1833
1834
1835 **Package Includes**:
1836
1837 * LHT65N Temperature & Humidity Sensor x 1
1838 * Optional external sensor
1839
1840 **Dimension and weight**:
1841
1842 * Device Size:  10 x 10 x 3.5 mm
1843 * Device Weight: 120.5g
1844
1845
1846 = 9. Reference material =
1847
1848
1849 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1850
1851
1852 = 10. FCC Warning =
1853
1854
1855 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1856
1857 (1) This device may not cause harmful interference；
1858
1859 (2) this device must accept any interference received, including interference that may cause undesired operation.
1860
1861
1862