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Version 210.3 by Xiaoling on 2022/10/26 15:43
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9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
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11 {{toc/}}
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15
16
17 = 1. Introduction =
18
19
20 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
21
22
23 (((
24 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
25 )))
26
27 (((
28 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
29 )))
30
31 (((
32 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
33 )))
34
35 (((
36 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
37 )))
38
39 (((
40 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
41 )))
42
43 (((
44 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
45 )))
46
47
48
49 == 1.2 Features ==
50
51
52 * Wall mountable
53 * LoRaWAN v1.0.3 Class A protocol
54 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
55 * AT Commands to change parameters
56 * Remote configure parameters via LoRaWAN Downlink
57 * Firmware upgradeable via program port
58 * Built-in 2400mAh battery for up to 10 years of use.
59 * Built-in Temperature & Humidity sensor
60 * Optional External Sensors
61 * Tri-color LED to indicate working status
62 * Datalog feature (Max 3328 records)
63
64
65 == 1.3 Specification ==
66
67
68 (% style="color:#037691" %)**Built-in Temperature Sensor:**
69
70 * Resolution: 0.01 °C
71 * Accuracy Tolerance : Typ ±0.3 °C
72 * Long Term Drift: < 0.02 °C/yr
73 * Operating Range: -40 ~~ 85 °C
74
75 (% style="color:#037691" %)**Built-in Humidity Sensor:**
76
77 * Resolution: 0.04 %RH
78 * Accuracy Tolerance : Typ ±3 %RH
79 * Long Term Drift: < 0.02 °C/yr
80 * Operating Range: 0 ~~ 96 %RH
81
82 (% style="color:#037691" %)**External Temperature Sensor:**
83
84 * Resolution: 0.0625 °C
85 * ±0.5°C accuracy from -10°C to +85°C
86 * ±2°C accuracy from -55°C to +125°C
87 * Operating Range: -55 °C ~~ 125 °C
88
89
90 = 2. Connect LHT65N to IoT Server =
91
92
93 == 2.1 How does LHT65N work? ==
94
95
96 (((
97 LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
98 )))
99
100 (((
101 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
102 )))
103
104
105
106 == 2.2 How to Activate LHT65N? ==
107
108
109 (((
110 The LHT65N has two working modes:
111 )))
112
113 * (((
114 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
115 )))
116 * (((
117 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
118 )))
119
120 (((
121 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
122 )))
123
124
125 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
126
127 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
128
129
130
131 == 2.3 Example to join LoRaWAN network ==
132
133
134 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
135 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
136
137
138 (% _mstvisible="1" class="wikigeneratedid" %)
139 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
140
141
142 (((
143 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
144 )))
145
146
147
148 === 2.3.1 Step 1: Create Device n TTN ===
149
150
151 (((
152 Create a device in TTN V3 with the OTAA keys from LHT65N.
153 )))
154
155 (((
156 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
157 )))
158
159 [[image:image-20220617150003-1.jpeg]]
160
161 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
162
163 Add APP EUI in the application.
164
165
166 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
167
168
169 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
170
171
172 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
173
174
175
176 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
177
178
179 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
180
181
182 Input APP EUI,  APP KEY and DEV EUI:
183
184
185 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
186
187
188
189
190 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
191
192
193 (((
194 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.
195 )))
196
197 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
198
199
200
201 == 2.4 Uplink Payload   ( Fport~=2) ==
202
203
204 (((
205 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.
206 )))
207
208 (((
209 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
210 )))
211
212 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
213 |=(% style="width: 60px;" %)
214 (((
215 **Size(bytes)**
216 )))|=(% style="width: 30px;" %)
217 (((
218 **2**
219 )))|=(% style="width: 100px;" %)
220 (((
221 **2**
222 )))|=(% style="width: 100px;" %)
223 (((
224 **2**
225 )))|=(% style="width: 50px;" %)
226 (((
227 **1**
228 )))|=(% style="width: 50px;" %)
229 (((
230 **4**
231 )))
232 |(% style="width:97px" %)
233 (((
234 **Value**
235 )))|(% style="width:39px" %)
236 (((
237 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo" ]]
238 )))|(% style="width:100px" %)
239 (((
240 (((
241 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
242 )))
243 )))|(% style="width:77px" %)
244 (((
245 (((
246 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
247 )))
248
249 )))|(% style="width:47px" %)
250 (((
251 [[Ext>>||anchor="H2.4.5Ext23" ]] #
252 )))|(% style="width:51px" %)
253 (((
254 [[Ext value>>||anchor="H2.4.6Extvalue"]]
255 )))
256
257 * The First 6 bytes: has fix meanings for every LHT65N.
258 * The 7th byte (EXT #): defines the external sensor model.
259 * 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.)
260
261
262 === 2.4.1 Decoder in TTN V3 ===
263
264
265 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.
266
267 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]]
268
269
270 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
271
272
273
274 === 2.4.2 BAT-Battery Info ===
275
276
277 These two bytes of BAT include the battery state and the actually voltage
278
279 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
280
281
282 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
283
284
285 Check the battery voltage for LHT65N.
286
287 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
288 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
289
290
291 === 2.4.3 Built-in Temperature ===
292
293
294 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
295
296 * Temperature:  0x0ABB/100=27.47℃
297
298 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
299
300 * Temperature:  (0xF5C6-65536)/100=-26.18℃
301
302
303 === 2.4.4 Built-in Humidity ===
304
305
306 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
307
308 * Humidity:    0x025C/10=60.4%
309
310
311 === 2.4.5 Ext # ===
312
313
314 Bytes for External Sensor:
315
316 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
317
318
319
320 === 2.4.6 Ext value ===
321
322
323 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
324
325
326 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
327
328
329 * DS18B20 temp=0x0ADD/100=27.81℃
330
331 The last 2 bytes of data are meaningless
332
333 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
334
335
336 * External temperature= (0xF54F-65536)/100=-27.37℃
337
338 The last 2 bytes of data are meaningless
339
340 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
341
342
343
344 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
345
346
347 (((
348 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:
349 )))
350
351 (((
352
353 )))
354
355 (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:510px" %)
356 |=(% style="width: 50px;" %)
357 (((**Size(bytes)**
358 )))|=(% _mstvisible="4" style="width: 71px;" %)
359 (((
360 (% _mstvisible="6" %)
361 (% _msthash="1817489" _msttexthash="4550" _mstvisible="8" %)**2**
362 )))|=(% _mstvisible="4" style="width: 99px;" %)(% _mstvisible="5" %)
363 (((
364 (% _mstvisible="6" %)
365 (% _msthash="1817490" _msttexthash="4550" _mstvisible="8" %)**2**
366 )))|=(% _mstvisible="4" style="width: 132px;" %)(% _mstvisible="5" %)
367 (((
368 (% _mstvisible="6" %)
369 (% _msthash="1817491" _msttexthash="4550" _mstvisible="8" %)**2**
370 )))|=(% _mstvisible="4" style="width: 54px;" %)(% _mstvisible="5" %)
371 (((
372 (% _mstvisible="6" %)
373 (% _msthash="1817492" _msttexthash="4459" _mstvisible="8" %)**1**
374 )))|=(% _mstvisible="4" style="width: 64px;" %)(% _mstvisible="5" %)
375 (((
376 (% _mstvisible="6" %)
377 (% _msthash="1817493" _msttexthash="4732" _mstvisible="8" %)**4**
378 )))
379 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:96px" %)(% _mstvisible="5" %)
380 (((
381 (% _mstvisible="6" %)
382 (% _msthash="1817494" _msttexthash="60203" _mstvisible="8" %)**Value**
383 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
384 (((
385 (% _mstvisible="6" %)
386 [[External temperature>>||anchor="H4.2SetExternalSensorMode" _msthash="1817495" _msttexthash="426517" _mstvisible="7"]]
387 )))|(% _mstvisible="4" style="width:99px" %)(% _mstvisible="5" %)
388 (((
389 (% _mstvisible="6" %)
390 (((
391 (% _mstvisible="7" %)
392 [[Built-In>>||anchor="H2.4.3Built-inTemperature" _msthash="2224745" _msttexthash="100464" _mstvisible="8"]]
393 )))
394
395 (% _mstvisible="6" %)
396 (((
397 (% _mstvisible="7" %)
398 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224746" _msttexthash="184041" _mstvisible="8"]]
399 )))
400 )))|(% _mstvisible="4" style="width:132px" %)(% _mstvisible="5" %)
401 (((
402 (% _mstvisible="6" %)
403 (((
404 (% _msthash="2224747" _msttexthash="136331" _mstvisible="7" %)
405 BAT Status &
406 )))
407
408 (% _mstvisible="6" %)
409 (((
410 (% _mstvisible="7" %)
411 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224748" _msttexthash="311181" _mstvisible="8"]]
412 )))
413 )))|(% _mstvisible="4" style="width:54px" %)(% _mstvisible="5" %)
414 (((
415 (% _msthash="1817496" _msttexthash="147225" _mstvisible="6" %)
416 Status & Ext
417 )))|(% _mstvisible="4" style="width:64px" %)(% _mstvisible="5" %)
418 (((
419 (% _mstvisible="6" %)
420 (((
421 (% _mstvisible="7" %)
422 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2224749" _msttexthash="227175" _mstvisible="8"]]
423 )))
424 )))
425
426 (% _mstvisible="1" %)
427 * (% _msthash="2539669" _msttexthash="857922" _mstvisible="3" %)**Battery status & **(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Built-in Humidity**
428
429 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
430 (% _mstvisible="3" %)|=(% _msthash="1230918" _msttexthash="93158" _mstvisible="4" style="width: 65px;" %)Bit(bit)|=(% _msthash="1230919" _msttexthash="57954" _mstvisible="4" style="width: 267px;" %)[15:14]|=(% _msthash="1230920" _msttexthash="48022" _mstvisible="4" style="width: 134px;" %)[11:0]
431 (% _mstvisible="3" %)|(% _msthash="1230921" _msttexthash="60203" _mstvisible="4" style="width:65px" %)Value|(% _mstvisible="4" style="width:267px" %)(% _mstvisible="5" %)
432 (((
433 (% _msthash="1817497" _msttexthash="128427" _mstvisible="6" %)
434 BAT Status
435
436 (% _msthash="1817498" _msttexthash="472784" _mstvisible="6" %)
437 00(b): Ultra Low ( BAT <= 2.50v)
438
439 (% _msthash="1817499" _msttexthash="483678" _mstvisible="6" %)
440 01(b): Low  (2.50v <=BAT <= 2.55v)
441
442 (% _msthash="1817500" _msttexthash="440791" _mstvisible="6" %)
443 10(b): OK   (2.55v <= BAT <=2.65v)
444
445 (% _msthash="1817501" _msttexthash="334191" _mstvisible="6" %)
446 11(b): Good   (BAT >= 2.65v)
447 )))|(% _mstvisible="4" style="width:134px" %)(% _mstvisible="5" %)
448 (((
449 (% _mstvisible="6" %)
450 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="1817502" _msttexthash="311181" _mstvisible="7"]]
451
452 (% _mstvisible="6" %)
453
454 )))
455
456 * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
457
458 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:520px" %)
459 |(% 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]**
460 |(% 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)
461
462 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
463 * (% 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.
464 * (% 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)
465
466
467 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
468
469
470 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
471
472 be used to power the external ADC sensor; user can control the power on time for this
473
474 (% style="color:blue" %)**sensor by setting:**
475
476 **AT+EXT=6,timeout**  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
477
478 **For example:**
479
480 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
481
482
483 Or use **downlink command A2** to set the same.
484
485 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
486
487 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.
488
489 [[image:image-20220628150112-1.png||height="241" width="285"]]
490
491
492 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
493
494 [[image:image-20220628150714-4.png]]
495
496
497 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.
498
499
500 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
501
502 [[image:image-20220628151005-5.png]]
503
504
505 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
506
507 [[image:image-20220628151056-6.png]]
508
509
510 3) Within range
511
512 [[image:image-20220628151143-7.png]]
513
514
515
516 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
517
518
519 [[image:image-20220927095645-1.png||height="534" width="460"]]
520
521
522 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
523
524 [[image:image-20220906102307-7.png]]
525
526
527 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
528
529 The external cable NE2 can be use for MOD4 and MOD8
530
531
532
533 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
534
535
536 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
537
538
539 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
540
541 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
542
543 In Open State, the power consumption is the same as if there is no probe
544
545 In Close state, the power consumption will be 3uA higher than normal.
546
547 [[image:image-20220906100852-1.png||height="205" width="377"]]
548
549
550 Ext=4,Interrupt Sensor：
551
552 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:512px" %)
553 |(% style="width:117px" %)(((
554 AT+EXT=4,1
555 )))|(% style="width:371px" %)(((
556 Sent uplink packet in both rising and falling interrupt
557 )))
558 |(% style="width:117px" %)(((
559 AT+EXT=4,2
560 )))|(% style="width:371px" %)(((
561 Sent uplink packet only in falling interrupt
562 )))
563 |(% style="width:117px" %)(((
564 AT+EXT=4,3
565 )))|(% style="width:371px" %)(((
566 Sent uplink packet only in rising interrupt
567 )))
568
569 Trigger by falling edge:
570
571 [[image:image-20220906101145-2.png]]
572
573
574 Trigger by raising edge：
575
576 [[image:image-20220906101145-3.png]]
577
578
579
580
581 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
582
583
584 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
585
586
587 (% 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.
588
589 [[image:image-20220906101320-4.png||height="366" width="698"]]
590
591
592 (% 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
593
594 [[image:image-20220906101320-5.png||height="353" width="696"]]
595
596
597 Ext=8, Counting Sensor ( 4 bytes)：
598
599 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
600 |(% style="width:138px" %)(((
601 AT+EXT=8,0
602 )))|(% style="width:240px" %)(((
603 Count at falling interrupt
604 )))
605 |(% style="width:138px" %)(((
606 AT+EXT=8,1
607 )))|(% style="width:240px" %)(((
608 Count at rising interrupt
609 )))
610 |(% style="width:138px" %)(((
611 AT+SETCNT=60
612 )))|(% style="width:240px" %)(((
613 Sent current count to 60
614 )))
615
616 [[image:image-20220906101320-6.png]]
617
618
619 (% style="color:blue" %)**A2 downlink Command：**
620
621 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
622
623 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
624
625 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
626
627 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
628
629 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)
630
631
632
633 == 2.5 Show data on Datacake ==
634
635
636 (((
637 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:
638 )))
639
640 (((
641
642 )))
643
644 (((
645 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
646 )))
647
648 (((
649 (% 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.
650 )))
651
652 (((
653
654 )))
655
656 (((
657 Add Datacake:
658 )))
659
660
661 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
662
663
664
665 Select default key as Access Key:
666
667
668 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
669
670
671 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
672
673
674 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
675
676
677 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
678
679
680
681 == 2.6 Datalog Feature ==
682
683
684 (((
685 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.
686 )))
687
688
689
690 === 2.6.1 Ways to get datalog via LoRaWAN ===
691
692
693 There are two methods:
694
695 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
696
697
698 (% 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.
699
700 (% style="color:red" %)**Note for method 2:**
701
702 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
703 * 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.
704
705 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
706
707
708 [[image:image-20220703111700-2.png||height="381" width="1119"]]
709
710
711 === 2.6.2 Unix TimeStamp ===
712
713
714 LHT65N uses Unix TimeStamp format based on
715
716
717 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
718
719
720
721 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
722
723 Below is the converter example
724
725 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
726
727 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
728
729
730
731 === 2.6.3 Set Device Time ===
732
733
734 (((
735 (% style="color:blue" %)**There are two ways to set device's time:**
736 )))
737
738 (((
739 **1.  Through LoRaWAN MAC Command (Default settings)**
740 )))
741
742 (((
743 User need to set SYNCMOD=1 to enable sync time via MAC command.
744 )))
745
746 (((
747 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).
748 )))
749
750 (((
751 (% 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.**
752 )))
753
754 (((
755
756 )))
757
758 (((
759 **2. Manually Set Time**
760 )))
761
762 (((
763 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
764 )))
765
766
767
768 === 2.6.4 Poll sensor value ===
769
770
771 User can poll sensor value based on timestamps from the server. Below is the downlink command.
772
773 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
774
775
776 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.
777
778 For example, downlink command **31 5FC5F350 5FC6 0160 05**
779
780 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
781
782 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
783
784
785
786 === 2.6.5 Datalog Uplink payload ===
787
788
789 (% _msthash="315267" _msttexthash="2245087" _mstvisible="1" %)
790 The Datalog poll reply uplink will use below payload format.
791
792 (% _mstvisible="1" %)
793 (((
794 (% _mstvisible="2" %)
795
796
797 (% _mstvisible="2" %)
798 (% _msthash="506080" _msttexthash="451581" _mstvisible="4" %)**Retrieval data payload**
799 )))
800
801 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
802 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 93px;" %)(% _mstvisible="5" %)
803 (((
804 (% _mstvisible="6" %)
805 (((
806 (% _mstvisible="7" %)
807 (% _msthash="2224750" _msttexthash="161122" _mstvisible="9" %)**Size(bytes)**
808 )))
809 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
810 (((
811 (% _mstvisible="6" %)
812 (((
813 (% _mstvisible="7" %)
814 (% _msthash="2224751" _msttexthash="4550" _mstvisible="9" %)**2**
815 )))
816 )))|=(% _mstvisible="4" style="width: 102px;" %)(% _mstvisible="5" %)
817 (((
818 (% _mstvisible="6" %)
819 (((
820 (% _mstvisible="7" %)
821 (% _msthash="2224752" _msttexthash="4550" _mstvisible="9" %)**2**
822 )))
823 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
824 (((
825 (% _mstvisible="6" %)
826 (((
827 (% _mstvisible="7" %)
828 (% _msthash="2224753" _msttexthash="4550" _mstvisible="9" %)**2**
829 )))
830 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
831 (((
832 (% _mstvisible="6" %)
833 (((
834 (% _mstvisible="7" %)
835 (% _msthash="2224754" _msttexthash="4459" _mstvisible="9" %)**1**
836 )))
837 )))|=(% _mstvisible="4" style="width: 48px;" %)(% _mstvisible="5" %)
838 (((
839 (% _mstvisible="6" %)
840 (((
841 (% _mstvisible="7" %)
842 (% _msthash="2224755" _msttexthash="4732" _mstvisible="9" %)**4**
843 )))
844 )))
845 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:93px" %)(% _mstvisible="5" %)
846 (((
847 (% _mstvisible="6" %)
848 (((
849 (% _mstvisible="7" %)
850 (% _msthash="2224756" _msttexthash="60203" _mstvisible="9" %)**Value**
851 )))
852 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
853 (((
854 (% _mstvisible="6" %)
855 (((
856 (% _mstvisible="7" %)
857 [[External sensor data>>||anchor="H2.4.6Extvalue" _msthash="2224757" _msttexthash="386672" _mstvisible="8"]]
858 )))
859 )))|(% _mstvisible="4" style="width:102px" %)(% _mstvisible="5" %)
860 (((
861 (% _mstvisible="6" %)
862 (((
863 (% _mstvisible="7" %)
864 (((
865 (% _mstvisible="8" %)
866 [[Built In>>||anchor="H2.4.3Built-inTemperature" _msthash="2671864" _msttexthash="91065" _mstvisible="9"]]
867 )))
868 )))
869
870 (% _mstvisible="6" %)
871 (((
872 (% _mstvisible="7" %)
873 (((
874 (% _mstvisible="8" %)
875 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2671865" _msttexthash="184041" _mstvisible="9"]]
876 )))
877 )))
878 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
879 (((
880 (% _mstvisible="6" %)
881 (((
882 (% _mstvisible="7" %)
883 (((
884 (% _mstvisible="8" %)
885 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2671866" _msttexthash="105872" _mstvisible="9"]]
886 )))
887 )))
888
889 (% _mstvisible="6" %)
890 (((
891 (% _mstvisible="7" %)
892 (((
893 (% _mstvisible="8" %)
894 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2671867" _msttexthash="117429" _mstvisible="9"]]
895 )))
896 )))
897 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
898 (((
899 (% _mstvisible="6" %)
900 (((
901 (% _msthash="2224758" _msttexthash="390390" _mstvisible="7" %)
902 Poll message flag & Ext
903 )))
904 )))|(% _mstvisible="4" style="width:48px" %)(% _mstvisible="5" %)
905 (((
906 (% _mstvisible="6" %)
907 (((
908 (% _mstvisible="7" %)
909 (((
910 (% _mstvisible="8" %)
911 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2671868" _msttexthash="227175" _mstvisible="9"]]
912 )))
913 )))
914
915 (% _mstvisible="6" %)
916 (((
917 (% _mstvisible="7" %)
918 (((
919 (% _mstvisible="8" %)
920
921 )))
922 )))
923 )))
924
925 (% _mstvisible="1" %)
926 (% _msthash="315268" _msttexthash="390390" _mstvisible="3" %)**Poll message flag & Ext**
927
928 (% _mstvisible="1" %)
929 (((
930 (% _mstvisible="2" %)
931 (((
932 (% _msthash="736723" _msttexthash="2005003" _mstvisible="3" %)
933 (((
934 [[image:image-20221006192726-1.png||height="112" width="754"]]
935
936 (% class="mark" %)**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)
937
938 (% class="mark" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
939
940
941 )))
942 )))
943 )))
944
945 (% _mstvisible="1" %)
946 * (% _mstvisible="3" %)
947 (((
948 (% _mstvisible="4" %)
949 (((
950 (% _msthash="1197157" _msttexthash="561548" _mstvisible="5" %)
951 (((
952 Poll Message Flag is set to 1.
953 )))
954 )))
955 )))
956 * (% _mstvisible="3" %)
957 (((
958 (% _mstvisible="4" %)
959 (((
960 (% _msthash="1197158" _msttexthash="9284964" _mstvisible="5" %)
961 (((
962 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
963 )))
964 )))
965 )))
966
967 (% _mstvisible="1" %)
968 (((
969 (% _mstvisible="2" %)
970 (((
971 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
972 (((
973
974 )))
975
976 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
977 (((
978 For example, in US915 band, the max payload for different DR is:
979 )))
980 )))
981 )))
982
983 (% _mstvisible="1" %)
984 (((
985 (% _mstvisible="2" %)
986 (((
987 (% _msthash="736725" _msttexthash="1065532" _mstvisible="3" %)
988 (((
989 **a) DR0:** max is 11 bytes so one entry of data
990 )))
991 )))
992 )))
993
994 (% _mstvisible="1" %)
995 (((
996 (% _mstvisible="2" %)
997 (((
998 (% _msthash="736726" _msttexthash="3265665" _mstvisible="3" %)
999 (((
1000 **b) DR1:** max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
1001 )))
1002 )))
1003 )))
1004
1005 (% _mstvisible="1" %)
1006 (((
1007 (% _mstvisible="2" %)
1008 (((
1009 (% _msthash="736727" _msttexthash="1454115" _mstvisible="3" style="text-align: left;" %)
1010 (((
1011 **c) DR2:** total payload includes 11 entries of data
1012 )))
1013 )))
1014 )))
1015
1016 (% _mstvisible="1" %)
1017 (((
1018 (% _mstvisible="2" %)
1019 (((
1020 (% _msthash="736728" _msttexthash="1483924" _mstvisible="3" style="text-align: left;" %)
1021 (((
1022 **d) DR3: **total payload includes 22 entries of data.
1023 )))
1024 )))
1025 )))
1026
1027 (% _mstvisible="1" %)
1028 (((
1029 (% _mstvisible="2" %)
1030 (((
1031 (% _msthash="736729" _msttexthash="5848349" _mstvisible="3" style="text-align: left;" %)
1032 (((
1033 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
1034 )))
1035 )))
1036 )))
1037
1038
1039 (% _mstvisible="1" style="text-align: left;" %)
1040 (% _msthash="315269" _msttexthash="104767" _mstvisible="3" %)**Example:**
1041
1042 (% _msthash="315270" _msttexthash="913822" _mstvisible="1" style="text-align: left;" %)
1043 If LHT65N has below data inside Flash:
1044
1045 (% _mstvisible="1" %)
1046 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
1047
1048 (% _mstvisible="1" %)
1049 (((
1050 (% _msthash="506081" _msttexthash="1663961" _mstvisible="2" style="text-align: left;" %)
1051 If user sends below downlink command: (% _mstvisible="3" style="background-color:yellow" %)3160065F9760066DA705
1052 )))
1053
1054 (% _mstvisible="1" %)
1055 (((
1056 (% _msthash="506082" _msttexthash="1092494" _mstvisible="2" style="text-align: left;" %)
1057 Where : Start time: 60065F97 = time 21/1/19 04:27:03
1058 )))
1059
1060 (% _mstvisible="1" %)
1061 (((
1062 (% _msthash="506083" _msttexthash="737269" _mstvisible="2" style="text-align: left;" %)
1063 Stop time 60066DA7= time 21/1/19 05:27:(% _msthash="903005" _msttexthash="9672" _mstvisible="2" %)03
1064 )))
1065
1066 (% _mstvisible="1" %)
1067 (((
1068 (% _mstvisible="2" %)
1069
1070 )))
1071
1072 (% _mstvisible="1" %)
1073 (((
1074 (% _msthash="506084" _msttexthash="751218" _mstvisible="2" style="text-align: left;" %)
1075 LHT65N will uplink this payload.
1076 )))
1077
1078 (% _mstvisible="1" %)
1079 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
1080
1081
1082 (% _msthash="315271" _msttexthash="12012546" _mstvisible="1" style="text-align: left;" %)
1083 (((
1084 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
1085 )))
1086
1087 (% _msthash="315237" _msttexthash="1385839" %)
1088 (((
1089 Where the first 11 bytes is for the first entry:
1090 )))
1091
1092 (% _msthash="315238" _msttexthash="274846" %)
1093 (((
1094 7FFF089801464160065F97
1095 )))
1096
1097 (% _msthash="315239" _msttexthash="617435" %)
1098 (((
1099 Ext sensor data=0x7FFF/100=327.67
1100 )))
1101
1102 (% _msthash="315240" _msttexthash="270543" %)
1103 (((
1104 Temp=0x0898/100=22.00
1105 )))
1106
1107 (% _msthash="315241" _msttexthash="211783" %)
1108 (((
1109 Hum=0x0146/10=32.6
1110 )))
1111
1112 (% _msthash="315242" _msttexthash="1569776" %)
1113 (((
1114 poll message flag & Ext=0x41,means reply data,Ext=1
1115 )))
1116
1117 (% _msthash="315243" _msttexthash="1120509" %)
1118 (((
1119 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
1120 )))
1121
1122
1123
1124 == 2.7 Alarm Mode ==
1125
1126
1127 (((
1128 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.
1129 )))
1130
1131 (((
1132 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
1133
1134
1135
1136 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
1137
1138
1139 (((
1140 (% class="box infomessage" %)
1141 (((
1142 **AT+WMOD=3,**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
1143
1144 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
1145
1146 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
1147
1148 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
1149
1150 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
1151
1152 **AT+LEDALARM=1** :       Enable LED visual Alarm.
1153 )))
1154 )))
1155
1156
1157
1158 )))
1159
1160 (((
1161 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
1162
1163
1164 )))
1165
1166 (% _mstvisible="1" class="box infomessage" %)
1167 (((
1168 (((
1169 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
1170 )))
1171
1172 (((
1173 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
1174 )))
1175
1176 (((
1177 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
1178 )))
1179
1180 (((
1181 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
1182 )))
1183
1184 (((
1185 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
1186 )))
1187 )))
1188
1189 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
1190
1191 Total bytes: 8 bytes
1192
1193 **Example:**AA0100010001003C
1194
1195 WMOD=01
1196
1197 CITEMP=0001
1198
1199 TEMPlow=0001
1200
1201 TEMPhigh=003C
1202
1203
1204
1205 == 2.8 LED Indicator ==
1206
1207
1208 The LHT65 has a triple color LED which for easy showing different stage .
1209
1210 While user press ACT button, the LED will work as per LED status with ACT button.
1211
1212 In a normal working state:
1213
1214 * For each uplink, the BLUE LED or RED LED will blink once.
1215 BLUE LED when external sensor is connected.
1216 * RED LED when external sensor is not connected
1217 * For each success downlink, the PURPLE LED will blink once
1218
1219
1220 == 2.9 installation ==
1221
1222
1223 (% _mstvisible="1" %)
1224 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
1225
1226
1227
1228 = 3. Sensors and Accessories =
1229
1230
1231 == 3.1 E2 Extension Cable ==
1232
1233
1234 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
1235
1236
1237 **1m long breakout cable for LHT65N. Features:**
1238
1239 * (((
1240 Use for AT Command， works for both LHT52/LHT65N
1241 )))
1242 * (((
1243 Update firmware for LHT65N, works for both LHT52/LHT65N
1244 )))
1245 * (((
1246 Supports ADC mode to monitor external ADC
1247 )))
1248 * (((
1249 Supports Interrupt mode
1250 )))
1251 * (((
1252 Exposed All pins from the LHT65N Type-C connector.
1253
1254
1255
1256 )))
1257
1258 [[image:image-20220619092421-3.png||height="371" width="529"]]
1259
1260
1261
1262
1263 == 3.2 E3 Temperature Probe ==
1264
1265
1266 [[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"]]
1267
1268
1269 Temperature sensor with 2 meters cable long
1270
1271 * Resolution: 0.0625 °C
1272 * ±0.5°C accuracy from -10°C to +85°C
1273 * ±2°C accuracy from -55°C to +125°C
1274 * Operating Range: -40 ~~ 125 °C
1275 * Working voltage 2.35v ~~ 5v
1276
1277
1278 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1279
1280
1281 (((
1282 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1283 )))
1284
1285 * (((
1286 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1287 )))
1288
1289 * (((
1290 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1291 )))
1292
1293 (((
1294 There are two kinds of commands to configure LHT65N, they are:
1295 )))
1296
1297 * (((
1298 (% style="color:#4f81bd" %)**General Commands**.
1299 )))
1300
1301 (((
1302 These commands are to configure:
1303 )))
1304
1305 1. (((
1306 General system settings like: uplink interval.
1307 )))
1308 1. (((
1309 LoRaWAN protocol & radio-related commands.
1310 )))
1311
1312 (((
1313 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]]
1314 )))
1315
1316 * (((
1317 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1318 )))
1319
1320 (((
1321 These commands are only valid for LHT65N, as below:
1322 )))
1323
1324
1325
1326 == 4.1 Set Transmit Interval Time ==
1327
1328
1329 Feature: Change LoRaWAN End Node Transmit Interval.
1330
1331
1332 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1333
1334 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1335
1336
1337 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1338
1339 Format: Command Code (0x01) followed by 3 bytes time value.
1340
1341 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1342
1343 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1344
1345 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1346
1347
1348 == 4.2 Set External Sensor Mode ==
1349
1350
1351 Feature: Change External Sensor Mode.
1352
1353
1354 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1355
1356 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1357
1358
1359 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1360
1361 Total bytes: 2 ~~ 5 bytes
1362
1363 **Example:**
1364
1365 * 0xA201: Set external sensor type to E1
1366
1367 * 0xA209: Same as AT+EXT=9
1368
1369 * 0xA20702003c: Same as AT+SETCNT=60
1370
1371
1372 == 4.3 Enable/Disable uplink Temperature probe ID ==
1373
1374
1375 (((
1376 Feature: If PID is enabled, device will send the temperature probe ID on:
1377 )))
1378
1379 * (((
1380 First Packet after OTAA Join
1381 )))
1382 * (((
1383 Every 24 hours since the first packet.
1384 )))
1385
1386 (((
1387 PID is default set to disable (0)
1388
1389
1390 )))
1391
1392 (% style="color:#4f81bd" %)**AT Command:**
1393
1394 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1395
1396
1397 (% style="color:#4f81bd" %)**Downlink Command:**
1398
1399 * **0xA800**  **~-~->** AT+PID=0
1400 * **0xA801**     **~-~->** AT+PID=1
1401
1402
1403 == 4.4 Set Password ==
1404
1405
1406 Feature: Set device password, max 9 digits
1407
1408
1409 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1410
1411 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1412
1413
1414 (% style="color:#4f81bd" %)**Downlink Command:**
1415
1416 No downlink command for this feature.
1417
1418
1419
1420 == 4.5 Quit AT Command ==
1421
1422
1423 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1424
1425
1426 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1427
1428 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1429
1430
1431 (% style="color:#4f81bd" %)**Downlink Command:**
1432
1433 No downlink command for this feature.
1434
1435
1436
1437 == 4.6 Set to sleep mode ==
1438
1439
1440 Feature: Set device to sleep mode
1441
1442 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1443 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1444
1445 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1446
1447 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1448
1449
1450 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1451
1452 * There is no downlink command to set to Sleep mode.
1453
1454
1455 == 4.7 Set system time ==
1456
1457
1458 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1459
1460
1461 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1462
1463 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1464
1465
1466 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1467
1468 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1469
1470
1471
1472 == 4.8 Set Time Sync Mode ==
1473
1474
1475 (((
1476 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1477 )))
1478
1479 (((
1480 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.
1481
1482
1483 )))
1484
1485 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1486
1487 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1488
1489
1490 (% style="color:#4f81bd" %)**Downlink Command:**
1491
1492 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1493 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1494
1495
1496
1497 == 4.9 Set Time Sync Interval ==
1498
1499
1500 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1501
1502
1503 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1504
1505 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1506
1507
1508 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1509
1510 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1511
1512
1513
1514 == 4.10 Print data entries base on page. ==
1515
1516
1517 Feature: Print the sector data from start page to stop page (max is 416 pages).
1518
1519
1520 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1521
1522 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1523
1524
1525 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1526
1527 No downlink commands for feature
1528
1529
1530
1531 == 4.11 Print last few data entries. ==
1532
1533
1534 Feature: Print the last few data entries
1535
1536
1537 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1538
1539 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1540
1541
1542 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1543
1544 No downlink commands for feature
1545
1546
1547
1548 == 4.12 Clear Flash Record ==
1549
1550
1551 Feature: Clear flash storage for data log feature.
1552
1553
1554 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1555
1556 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1557
1558
1559 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1560
1561 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1562
1563
1564 == 4.13 Auto Send None-ACK messages ==
1565
1566
1567 (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
1568 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.
1569
1570
1571 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1572
1573 (% _msthash="315396" _msttexthash="734682" _mstvisible="1" %)
1574 The default factory setting is 0
1575
1576 (% _mstvisible="1" border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1577 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 171px;" %)(% _msthash="1231737" _msttexthash="251862" _mstvisible="6" %)**Command Example**|=(% _mstvisible="4" style="width: 219px;" %)(% _msthash="1231738" _msttexthash="116025" _mstvisible="6" %)**Function**|=(% _mstvisible="4" style="width: 119px;" %)(% _msthash="1231739" _msttexthash="116831" _mstvisible="6" %)**Response**
1578 (% _mstvisible="3" %)|(% _msthash="1231321" _msttexthash="130455" _mstvisible="4" style="width:171px" %)AT+PNACKMD=1|(% _msthash="1231322" _msttexthash="377026" _mstvisible="4" style="width:219px" %)Poll None-ACK message|(% _msthash="1231323" _msttexthash="14989" _mstvisible="4" style="width:119px" %)OK
1579
1580 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1581
1582 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1583
1584
1585 == 4.14 Modified ATWOOD command for external sensor TMP117 or DS18B20 temperature alarm ==
1586
1587
1588 Feature: Set internal and external temperature sensor alarms.
1589
1590 (% border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1591 |(%%)(% _msthash="1231737" _msttexthash="251862" _mstvisible="6" %)**Command Example**|(%%)(% _msthash="1231738" _msttexthash="116025" _mstvisible="6" %)**Function**|(%%)(% _msthash="1231739" _msttexthash="116831" _mstvisible="6" %)**Response**
1592 |(%%)(% style="color:#037691" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|Set internal and external temperature sensor alarms|OK
1593
1594 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1595
1596 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1597
1598 0): Cancel
1599
1600 1): Threshold alarm
1601
1602 2): Fluctuation alarm
1603
1604
1605 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1606
1607 (% 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.**
1608
1609
1610 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1611
1612 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1613
1614 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1615
1616
1617 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.
1618
1619 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1620
1621 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1622
1623
1624 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1625
1626 0xA5 00 ~-~- AT+WMOD=0.
1627
1628 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 )
1629
1630 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1631
1632 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.
1633
1634
1635
1636 = 5. Battery & How to replace =
1637
1638
1639 == 5.1 Battery Type ==
1640
1641
1642 (((
1643 (((
1644 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.
1645 )))
1646 )))
1647
1648 (((
1649
1650 )))
1651
1652 (((
1653 (((
1654 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1655 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1656 )))
1657 )))
1658
1659 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1660
1661
1662
1663 == 5.2 Replace Battery ==
1664
1665
1666 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.
1667
1668 [[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"]]
1669
1670
1671 == 5.3 Battery Life Analyze ==
1672
1673
1674 (((
1675 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:
1676 [[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]]
1677 )))
1678
1679 (((
1680
1681 )))
1682
1683 (((
1684 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]]
1685 )))
1686
1687
1688
1689 = 6. FAQ =
1690
1691
1692 == 6.1 How to use AT Command? ==
1693
1694
1695 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.
1696
1697 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1698
1699
1700 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1701
1702 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1703 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1704 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1705
1706 (((
1707 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.
1708 )))
1709
1710
1711 Input password and ATZ to activate LHT65N,As shown below:
1712
1713 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1714
1715
1716 (% _msthash="506066" _msttexthash="544869" %)
1717 AT Command List is as below:
1718
1719 (% _msthash="506067" _msttexthash="361920" %)
1720 AT+<CMD>? :  Help on <CMD>
1721
1722 (% _msthash="506068" _msttexthash="243061" %)
1723 AT+<CMD> :  Run <CMD>
1724
1725 (% _msthash="506069" _msttexthash="704197" %)
1726 AT+<CMD>=<value> :  Set the value
1727
1728 (% _msthash="506070" _msttexthash="455676" %)
1729 AT+<CMD>=? :  Get the value
1730
1731 (% _msthash="506071" _msttexthash="670553" %)
1732 AT+DEBUG:  Set more info output
1733
1734 (% _msthash="506072" _msttexthash="485888" %)
1735 ATZ:  Trig a reset of the MCU
1736
1737 (% _msthash="506073" _msttexthash="2068872" %)
1738 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1739
1740 (% _msthash="506074" _msttexthash="689169" %)
1741 AT+DEUI:  Get or Set the Device EUI
1742
1743 (% _msthash="506075" _msttexthash="960414" %)
1744 AT+DADDR:  Get or Set the Device Address
1745
1746 (% _msthash="506076" _msttexthash="1079897" %)
1747 AT+APPKEY:  Get or Set the Application Key
1748
1749 (% _msthash="506077" _msttexthash="1326143" %)
1750 AT+NWKSKEY:  Get or Set the Network Session Key
1751
1752 (% _msthash="506078" _msttexthash="1573000" %)
1753 AT+APPSKEY:  Get or Set the Application Session Key
1754
1755 (% _msthash="506079" _msttexthash="1041729" %)
1756 AT+APPEUI:  Get or Set the Application EUI
1757
1758 (% _msthash="506080" _msttexthash="2104206" %)
1759 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1760
1761 (% _msthash="506081" _msttexthash="3369288" %)
1762 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1763
1764 (% _msthash="506082" _msttexthash="1894529" %)
1765 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1766
1767 (% _msthash="506083" _msttexthash="3864172" %)
1768 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1769
1770 (% _msthash="506084" _msttexthash="1712204" %)
1771 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1772
1773 (% _msthash="506085" _msttexthash="1281202" %)
1774 AT+RX2FQ:  Get or Set the Rx2 window frequency
1775
1776 (% _msthash="506086" _msttexthash="2796781" %)
1777 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1778
1779 (% _msthash="506087" _msttexthash="3285165" %)
1780 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1781
1782 (% _msthash="506088" _msttexthash="3286179" %)
1783 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1784
1785 (% _msthash="506089" _msttexthash="4703803" %)
1786 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1787
1788 (% _msthash="506090" _msttexthash="4704999" %)
1789 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1790
1791 (% _msthash="506091" _msttexthash="1528683" %)
1792 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1793
1794 (% _msthash="506092" _msttexthash="757185" %)
1795 AT+NWKID:  Get or Set the Network ID
1796
1797 (% _msthash="506093" _msttexthash="1156597" %)
1798 AT+FCU:  Get or Set the Frame Counter Uplink
1799
1800 (% _msthash="506094" _msttexthash="1273987" %)
1801 AT+FCD:  Get or Set the Frame Counter Downlink
1802
1803 (% _msthash="506095" _msttexthash="859222" %)
1804 AT+CLASS:  Get or Set the Device Class
1805
1806 (% _msthash="506096" _msttexthash="384852" %)
1807 AT+JOIN:  Join network
1808
1809 (% _msthash="506097" _msttexthash="548626" %)
1810 AT+NJS:  Get the join status
1811
1812 (% _msthash="506098" _msttexthash="2546206" %)
1813 AT+SENDB:  Send hexadecimal data along with the application port
1814
1815 (% _msthash="506099" _msttexthash="1932307" %)
1816 AT+SEND:  Send text data along with the application port
1817
1818 (% _msthash="506100" _msttexthash="3560557" %)
1819 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1820
1821 (% _msthash="506101" _msttexthash="1429701" %)
1822 AT+RECV:  Print last received data in raw format
1823
1824 (% _msthash="506102" _msttexthash="1735981" %)
1825 AT+VER:  Get current image version and Frequency Band
1826
1827 (% _msthash="506103" _msttexthash="1189474" %)
1828 AT+CFM:  Get or Set the confirmation mode (0-1)
1829
1830 (% _msthash="506104" _msttexthash="1718210" %)
1831 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1832
1833 (% _msthash="506105" _msttexthash="1339403" %)
1834 AT+SNR:  Get the SNR of the last received packet
1835
1836 (% _msthash="506106" _msttexthash="1452009" %)
1837 AT+RSSI:  Get the RSSI of the last received packet
1838
1839 (% _msthash="506107" _msttexthash="2768142" %)
1840 AT+TDC:  Get or set the application data transmission interval in ms
1841
1842 (% _msthash="506108" _msttexthash="1083914" %)
1843 AT+PORT:  Get or set the application port
1844
1845 (% _msthash="506109" _msttexthash="622440" %)
1846 AT+DISAT:  Disable AT commands
1847
1848 (% _msthash="506110" _msttexthash="868361" %)
1849 AT+PWORD: Set password, max 9 digits
1850
1851 (% _msthash="506111" _msttexthash="2210299" %)
1852 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1853
1854 (% _msthash="506112" _msttexthash="2113462" %)
1855 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1856
1857 (% _msthash="506113" _msttexthash="2087423" %)
1858 AT+PDTA:  Print the sector data from start page to stop page
1859
1860 (% _msthash="506114" _msttexthash="1063127" %)
1861 AT+PLDTA:  Print the last few sets of data
1862
1863 (% _msthash="506115" _msttexthash="1999426" %)
1864 AT+CLRDTA:  Clear the storage, record position back to 1st
1865
1866 (% _msthash="506116" _msttexthash="442130" %)
1867 AT+SLEEP:  Set sleep mode
1868
1869 (% _msthash="506117" _msttexthash="1080222" %)
1870 AT+EXT:  Get or Set external sensor model
1871
1872 (% _msthash="506118" _msttexthash="1309490" %)
1873 AT+BAT:  Get the current battery voltage in mV
1874
1875 (% _msthash="506119" _msttexthash="813891" %)
1876 AT+CFG:  Print all configurations
1877
1878 (% _msthash="506120" _msttexthash="551707" %)
1879 AT+WMOD:  Get or Set Work Mode
1880
1881 (% _msthash="506121" _msttexthash="2631499" %)
1882 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1883
1884 (% _msthash="506122" _msttexthash="3907150" %)
1885 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1886
1887 (% _msthash="506123" _msttexthash="854620" %)
1888 AT+SETCNT:  Set the count at present
1889
1890 (% _msthash="506124" _msttexthash="2554877" %)
1891 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1892
1893 (% _msthash="506125" _msttexthash="771849" %)
1894 AT+RPL:  Get or set response level
1895
1896 (% _msthash="506126" _msttexthash="1484314" %)
1897 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1898
1899 (% _msthash="506127" _msttexthash="741728" %)
1900 AT+LEAPSEC:  Get or Set Leap Second
1901
1902 (% _msthash="506128" _msttexthash="1694017" %)
1903 AT+SYNCMOD:  Get or Set time synchronization method
1904
1905 (% _msthash="506129" _msttexthash="2235948" %)
1906 AT+SYNCTDC:  Get or set time synchronization interval in day
1907
1908 (% _msthash="506130" _msttexthash="425542" %)
1909 AT+PID:  Get or set the PID
1910
1911
1912
1913 == 6.2 Where to use AT commands and Downlink commands ==
1914
1915
1916 **AT commands：**
1917
1918 [[image:image-20220620153708-1.png||height="603" width="723"]]
1919
1920
1921 **Downlink commands:**
1922
1923
1924
1925 (% style="color:blue" %)**TTN:**
1926
1927 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1928
1929
1930
1931 (% style="color:blue" %)**Helium：**
1932
1933 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1934
1935
1936
1937 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1938
1939
1940 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1941
1942
1943 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1944
1945
1946
1947 (% style="color:blue" %)**Aws:**
1948
1949 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1950
1951
1952
1953 == 6.3 How to change the uplink interval？ ==
1954
1955
1956 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);"]]
1957
1958
1959
1960 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1961
1962
1963 [[image:image-20220615153355-1.png]]
1964
1965 [[image:1655802313617-381.png]]
1966
1967
1968 (((
1969 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.
1970 )))
1971
1972
1973 Input password and ATZ to activate LHT65N,As shown below:
1974
1975 [[image:image-20220615154519-3.png||height="672" width="807"]]
1976
1977
1978
1979 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1980
1981
1982 [[image:image-20220615153355-1.png]]
1983
1984
1985 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1986
1987 [[image:image-20220615170542-5.png]]
1988
1989
1990
1991 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1992
1993 (% _msthash="506146" _msttexthash="52173160" %)
1994 First connect the four lines；(% style="display:none" %)
1995
1996 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1997
1998
1999 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
2000
2001 [[image:image-20220621170938-2.png]]
2002
2003
2004
2005 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
2006
2007 [[image:image-20220615171334-6.png]]
2008
2009
2010 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
2011
2012
2013 When this interface appears, it indicates that the download has been completed.
2014
2015 [[image:image-20220620160723-8.png]]
2016
2017
2018 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
2019
2020
2021
2022 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
2023
2024
2025 [[image:image-20220623110706-1.png]]
2026
2027
2028 [[image:image-20220623112117-4.png||height="459" width="343"]]
2029
2030
2031 (((
2032 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.
2033 )))
2034
2035
2036 Input password and ATZ to activate LHT65N,As shown below:
2037
2038 [[image:image-20220615154519-3.png||height="672" width="807"]]
2039
2040
2041
2042 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
2043
2044
2045 [[image:image-20220623110706-1.png]]
2046
2047
2048 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
2049
2050 [[image:image-20220615170542-5.png]]
2051
2052
2053
2054 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
2055
2056 (% _msthash="506146" _msttexthash="52173160" %)
2057 First connect the four lines；
2058
2059 (% _msthash="506146" _msttexthash="52173160" %)
2060 [[image:image-20220623113959-5.png||height="528" width="397"]]
2061
2062 (% _msthash="506146" _msttexthash="52173160" %)
2063 Press and hold the start key to restart and enter  (% _mstvisible="1" %)bootlaod(%%) mode.
2064
2065
2066
2067 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
2068
2069 [[image:image-20220615171334-6.png]]
2070
2071
2072 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
2073
2074
2075 When this interface appears, it indicates that the download has been completed.
2076
2077 [[image:image-20220620160723-8.png]]
2078
2079
2080 Finally,restart reset device again
2081
2082
2083
2084 = 7. Order Info =
2085
2086
2087 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
2088
2089 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
2090
2091 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
2092 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
2093 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
2094 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
2095 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
2096 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
2097 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
2098 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
2099
2100 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
2101
2102 * (% style="color:red" %)**E3**(%%): External Temperature Probe
2103
2104
2105 = 8. Packing Info =
2106
2107
2108 **Package Includes**:
2109
2110 * LHT65N Temperature & Humidity Sensor x 1
2111 * Optional external sensor
2112
2113 **Dimension and weight**:
2114
2115 * Device Size:  10 x 10 x 3.5 cm
2116 * Device Weight: 120.5g
2117
2118
2119 = 9. Reference material =
2120
2121
2122 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
2123
2124
2125 = 10. FCC Warning =
2126
2127
2128 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
2129
2130 (1) This device may not cause harmful interference；
2131
2132 (2) this device must accept any interference received, including interference that may cause undesired operation.
2133
2134
2135