Last modified by Xiaoling on 2023/07/17 14:15
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
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4
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6
7
8 **Table of Contents:**
9
10 {{toc/}}
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12
13
14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 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.**
23 )))
24
25 (((
26 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.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46 == 1.2 Features ==
47
48
49 * LoRaWAN v1.0.3 Class A protocol
50 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
51 * AT Commands to change parameters
52 * Remote configure parameters via LoRaWAN Downlink
53 * Firmware upgradeable via program port
54 * Built-in 2400mAh battery for up to 10 years of use.
55 * Built-in Temperature & Humidity sensor
56 * Optional External Sensors
57 * Tri-color LED to indicate working status
58 * Datalog feature (Max 3328 records)
59
60
61
62 == 1.3 Specification ==
63
64
65 (% style="color:#037691" %)**Built-in Temperature Sensor:**
66
67 * Resolution: 0.01 °C
68 * Accuracy Tolerance : Typ ±0.3 °C
69 * Long Term Drift: < 0.02 °C/yr
70 * Operating Range: -40 ~~ 85 °C
71
72 (% style="color:#037691" %)**Built-in Humidity Sensor:**
73
74 * Resolution: 0.04 %RH
75 * Accuracy Tolerance : Typ ±3 %RH
76 * Long Term Drift: < 0.02 °C/yr
77 * Operating Range: 0 ~~ 96 %RH
78
79 (% style="color:#037691" %)**External Temperature Sensor:**
80
81 * Resolution: 0.0625 °C
82 * ±0.5°C accuracy from -10°C to +85°C
83 * ±2°C accuracy from -55°C to +125°C
84 * Operating Range: -55 °C ~~ 125 °C
85
86
87
88 = 2. Connect LHT65N to IoT Server =
89
90 == 2.1 How does LHT65N work? ==
91
92
93 (((
94 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.
95 )))
96
97 (((
98 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.
99 )))
100
101
102 == 2.2 How to Activate LHT65N? ==
103
104
105 (((
106 The LHT65N has two working modes:
107 )))
108
109 * (((
110 (% 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.
111 )))
112 * (((
113 (% 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. 
114 )))
115
116 (((
117 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
118 )))
119
120
121 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
122
123 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
124 |=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)**Action**
125 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT between 1s < time < 3s|(% style="background-color:#f2f2f2; width:117px" %)Test uplink status|(% style="background-color:#f2f2f2; width:225px" %)(((
126 If LHT65N is already Joined to rhe LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has external sensor connected,(% style="color:blue" %)**Blue led** (%%)will blink once. If LHT65N has not external sensor, (% style="color:red" %)**Red led**(%%) will blink once.
127 )))
128 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT for more than 3s|(% style="background-color:#f2f2f2; width:117px" %)Active Device|(% style="background-color:#f2f2f2; width:225px" %)(((
129 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
130 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
131 )))
132 |(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means LHT65N is in Deep Sleep Mode.
133
134
135
136 == 2.3 Example to join LoRaWAN network ==
137
138
139 (% class="wikigeneratedid" %)
140 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.
141
142
143 (% class="wikigeneratedid" %)
144 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
145
146
147 (((
148 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:
149 )))
150
151
152 === 2.3.1 Step 1: Create Device n TTN ===
153
154
155 (((
156 Create a device in TTN V3 with the OTAA keys from LHT65N.
157 )))
158
159 (((
160 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
161 )))
162
163 [[image:image-20230426083319-1.png||height="258" width="556"]]
164
165 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
166
167 Add APP EUI in the application.
168
169
170 [[image:image-20220522232916-3.png||_mstalt="430495"]]
171
172
173 [[image:image-20220522232932-4.png||_mstalt="430157"]]
174
175
176 [[image:image-20220522232954-5.png||_mstalt="431847"]]
177
178
179
180 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
181
182
183 [[image:image-20220522233026-6.png||_mstalt="429403"]]
184
185
186 Input APP EUI,  APP KEY and DEV EUI:
187
188
189 [[image:image-20220522233118-7.png||_mstalt="430430"]]
190
191
192 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
193
194
195 (((
196 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.
197 )))
198
199 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
200
201
202 == 2.4 Uplink Payload (Fport~=2) ==
203
204
205 (((
206 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
207 )))
208
209 (((
210 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
211 )))
212
213 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
214 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
215 **Size(bytes)**
216 )))|=(% style="width: 30px;background-color:#D9E2F3;color:#0070C0" %)(((
217 **2**
218 )))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)(((
219 **2**
220 )))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)(((
221 **2**
222 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
223 **1**
224 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
225 **4**
226 )))
227 |(% style="width:97px" %)(((
228 **Value**
229 )))|(% style="width:39px" %)(((
230 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
231 )))|(% style="width:100px" %)(((
232 (((
233 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
234 )))
235 )))|(% style="width:77px" %)(((
236 (((
237 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
238 )))
239 )))|(% style="width:47px" %)(((
240 [[Ext>>||anchor="H2.4.5Ext23"]] #
241 )))|(% style="width:51px" %)(((
242 [[Ext value>>||anchor="H2.4.6Extvalue"]]
243 )))
244
245 * The First 6 bytes: has fix meanings for every LHT65N.
246
247 * The 7th byte (EXT #): defines the external sensor model.
248
249 * The 8^^th^^ ~~ 11^^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.)
250
251
252
253 === 2.4.1 Decoder in TTN V3 ===
254
255
256 When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
257
258 Below is the position to put the decoder and LHT65N decoder can be download from here: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
259
260
261 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
262
263
264 === 2.4.2 BAT-Battery Info ===
265
266
267 These two bytes of BAT include the battery state and the actually voltage.
268
269 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
270 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
271 **Bit(bit)**
272 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
273 |(% style="width:66px" %)(((
274 **Value**
275 )))|(% style="width:250px" %)(((
276 BAT Status
277 00(b): Ultra Low ( BAT <= 2.50v)
278 01(b): Low (2.50v <=BAT <= 2.55v)
279 10(b): OK (2.55v <= BAT <=2.65v)
280 11(b): Good (BAT >= 2.65v)
281 )))|(% style="width:152px" %)Actually BAT voltage
282
283 **(b)stands for binary**
284
285
286 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
287
288
289 Check the battery voltage for LHT65N.
290
291 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
292
293 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
294
295
296
297 === 2.4.3 Built-in Temperature ===
298
299
300 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
301
302 * Temperature:  0x0ABB/100=27.47℃
303
304 [[image:image-20220522235639-3.png||_mstalt="432120"]]
305
306 * Temperature:  (0xF5C6-65536)/100=-26.18℃
307
308
309
310 (% style="display:none" %)
311
312 === 2.4.4 Built-in Humidity ===
313
314
315 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
316
317 * Humidity:    0x025C/10=60.4%
318
319
320
321 (% style="display:none" %)
322
323 === 2.4.5 Ext # ===
324
325
326 Bytes for External Sensor:
327
328 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
329 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # **Value|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)External Sensor Type
330 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
331 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
332
333
334
335 === 2.4.6 Ext value ===
336
337 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
338
339
340 [[image:image-20220522235639-5.png||_mstalt="432848"]]
341
342
343 * DS18B20 temp=0x0ADD/100=27.81℃
344
345 The last 2 bytes of data are meaningless
346
347
348
349 [[image:image-20220522235639-6.png||_mstalt="433212"]]
350
351
352 * External temperature= (0xF54F-65536)/100=-27.37℃
353
354 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
355
356 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
357
358 The last 2 bytes of data are meaningless
359
360 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
361
362
363
364 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
365
366
367 (((
368 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:
369 )))
370
371
372 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
373 |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
374 **Size(bytes)**
375 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
376 **2**
377 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
378 **2**
379 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
380 **2**
381 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
382 **1**
383 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
384 **4**
385 )))
386 |(% style="width:110px" %)(((
387 **Value**
388 )))|(% style="width:71px" %)(((
389 External temperature
390 )))|(% style="width:99px" %)(((
391 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
392 )))|(% style="width:132px" %)(((
393 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
394 )))|(% style="width:54px" %)(((
395 Status & Ext
396 )))|(% style="width:64px" %)(((
397 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
398 )))
399
400 * **Battery status & Built-in Humidity**
401
402 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
403 |=(% style="width: 69px;background-color:#D9E2F3;color:#0070C0" %)Bit(bit)|=(% style="width: 258px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 134px;background-color:#D9E2F3;color:#0070C0" %)[11:0]
404 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
405 BAT Status
406 00(b): Ultra Low ( BAT <= 2.50v)
407 01(b): Low  (2.50v <=BAT <= 2.55v)
408 10(b): OK   (2.55v <= BAT <=2.65v)
409 11(b): Good   (BAT >= 2.65v)
410 )))|(% style="width:132px" %)(((
411 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
412 )))
413
414 * **Status & Ext Byte**
415
416 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
417 |(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**Bits**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**7**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**[3:0]**
418 |(% 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)
419
420 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
421 * (% 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.
422 * (% 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)
423
424
425
426 ==== 2.4.6.3 Ext~=6, ADC Sensor(use with E2 Cable) ====
427
428
429 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
430
431 be used to power the external ADC sensor; user can control the power on time for this
432
433 (% style="color:blue" %)**sensor by setting:**
434
435 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
436
437 **For example:**
438
439 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
440
441
442 Or use **downlink command A2** to set the same.
443
444 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
445
446 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.
447
448 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
449
450
451 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
452
453 [[image:image-20220628150714-4.png||_mstalt="431054"]]
454
455
456 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.
457
458
459 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
460
461 [[image:image-20220628151005-5.png||_mstalt="429546"]]
462
463
464 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
465
466 [[image:image-20220628151056-6.png||_mstalt="431873"]]
467
468
469 3) Within range
470
471 [[image:image-20220628151143-7.png||_mstalt="431210"]]
472
473
474
475 ==== 2.4.6.4 Ext~=2 TMP117 Sensor(Since Firmware v1.3) ====
476
477
478 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
479
480
481 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
482
483 [[image:image-20220906102307-7.png||_mstalt="430443"]]
484
485
486 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
487
488 The external cable NE2 can be use for MOD4 and MOD8
489
490
491
492 ==== 2.4.6.5 Ext~=11 SHT31 Sensor (Since Firmware v1.4.1) ====
493
494
495 [[image:65N-E31F.jpg||height="454" width="459"]]
496
497
498 (% style="color:blue" %)**Ext=11,Temperature & Humidity Sensor(SHT31)：**
499
500 [[image:SHT31.png]]
501
502
503
504 ==== 2.4.6.6 Ext~=4 Interrupt Mode(Since Firmware v1.3) ====
505
506
507 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
508
509
510 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
511
512 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
513
514 In Open State, the power consumption is the same as if there is no probe
515
516 In Close state, the power consumption will be 3uA higher than normal.
517
518 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
519
520
521 Ext=4,Interrupt Sensor：
522
523 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
524 |(% style="width:101px" %)(((
525 **AT+EXT=4,1**
526 )))|(% style="width:395px" %)(((
527 **Sent uplink packet in both rising and falling interrupt**
528 )))
529 |(% style="width:101px" %)(((
530 **AT+EXT=4,2**
531 )))|(% style="width:395px" %)(((
532 **Sent uplink packet only in falling interrupt**
533 )))
534 |(% style="width:101px" %)(((
535 **AT+EXT=4,3**
536 )))|(% style="width:395px" %)(((
537 **Sent uplink packet only in rising interrupt**
538 )))
539
540 Trigger by falling edge:
541
542 [[image:image-20220906101145-2.png||_mstalt="428324"]]
543
544
545 Trigger by raising edge：
546
547 [[image:image-20220906101145-3.png||_mstalt="428688"]]
548
549
550
551 ==== 2.4.6.7 Ext~=8 Counting Mode(Since Firmware v1.3) ====
552
553
554 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
555
556
557 (% 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.
558
559 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
560
561
562 (% 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
563
564 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
565
566
567 Ext=8, Counting Sensor ( 4 bytes)：
568
569 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
570 |(% style="width:131px" %)(((
571 **AT+EXT=8,0**
572 )))|(% style="width:195px" %)(((
573 **Count at falling interrupt**
574 )))
575 |(% style="width:131px" %)(((
576 **AT+EXT=8,1**
577 )))|(% style="width:195px" %)(((
578 **Count at rising interrupt**
579 )))
580 |(% style="width:131px" %)(((
581 **AT+SETCNT=60**
582 )))|(% style="width:195px" %)(((
583 **Sent current count to 60**
584 )))
585
586 [[image:image-20220906101320-6.png||_mstalt="428064"]]
587
588
589 (% style="color:blue" %)**A2 downlink Command：**
590
591 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
592
593 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
594
595 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
596
597 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
598
599 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)
600
601
602 ==== 2.4.6.8 Ext~=10, E2 sensor (TMP117)with Unix Timestamp(Since firmware V1.3.2) ====
603
604
605 (((
606 Timestamp mode is designed for LHT65N with E2 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:
607 )))
608
609
610 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
611 |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
612 **Size(bytes)**
613 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
614 **2**
615 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
616 **2**
617 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
618 **2**
619 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
620 **1**
621 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
622 **4**
623 )))
624 |(% style="width:110px" %)(((
625 **Value**
626 )))|(% style="width:71px" %)(((
627 External temperature
628 )))|(% style="width:99px" %)(((
629 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
630 )))|(% style="width:132px" %)(((
631 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
632 )))|(% style="width:54px" %)(((
633 Status & Ext
634 )))|(% style="width:64px" %)(((
635 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
636 )))
637
638 * **Battery status & Built-in Humidity**
639
640 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
641 |=(% style="width: 69px;background-color:#D9E2F3;color:#0070C0" %)Bit(bit)|=(% style="width: 258px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 134px;background-color:#D9E2F3;color:#0070C0" %)[11:0]
642 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
643 BAT Status
644 00(b): Ultra Low ( BAT <= 2.50v)
645 01(b): Low  (2.50v <=BAT <= 2.55v)
646 10(b): OK   (2.55v <= BAT <=2.65v)
647 11(b): Good   (BAT >= 2.65v)
648 )))|(% style="width:132px" %)(((
649 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
650 )))
651
652 * **Status & Ext Byte**
653
654 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
655 |(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**Bits**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**7**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**[3:0]**
656 |(% 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)
657
658 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
659 * (% 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.
660 * (% 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)
661
662
663
664 == 2.5 Show data on Datacake ==
665
666
667 (((
668 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:
669 )))
670
671
672 (((
673 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
674 )))
675
676 (((
677 (% 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.
678 )))
679
680
681 (((
682 Add Datacake:
683 )))
684
685
686 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
687
688
689
690 Select default key as Access Key:
691
692
693 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
694
695
696 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
697
698
699 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
700
701
702 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
703
704
705 == 2.6 Datalog Feature ==
706
707
708 (((
709 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.
710 )))
711
712
713 === 2.6.1 Ways to get datalog via LoRaWAN ===
714
715
716 There are two methods:
717
718 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
719
720
721 (% 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.
722
723
724 (% style="color:red" %)**Note for method 2:**
725
726 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
727 * 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.
728
729 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
730
731
732 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
733
734
735 === 2.6.2 Unix TimeStamp ===
736
737
738 LHT65N uses Unix TimeStamp format based on
739
740
741 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
742
743
744
745 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
746
747 Below is the converter example
748
749 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
750
751
752 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
753
754
755 === 2.6.3 Set Device Time ===
756
757
758 (((
759 (% style="color:blue" %)**There are two ways to set device's time:**
760 )))
761
762 (((
763 **1.  Through LoRaWAN MAC Command (Default settings)**
764 )))
765
766 (((
767 User need to set SYNCMOD=1 to enable sync time via MAC command.
768 )))
769
770 (((
771 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).
772 )))
773
774 (((
775 (% 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.**
776 )))
777
778
779 (((
780 **2. Manually Set Time**
781 )))
782
783 (((
784 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
785 )))
786
787
788 === 2.6.4 Poll sensor value ===
789
790
791 User can poll sensor value based on timestamps from the server. Below is the downlink command.
792
793 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
794 |(% style="background-color:#d9e2f3; color:#0070c0; width:58px" %)**1byte**|(% style="background-color:#d9e2f3; color:#0070c0; width:128px" %)**4bytes**|(% style="background-color:#d9e2f3; color:#0070c0; width:123px" %)**4bytes**|(% style="background-color:#d9e2f3; color:#0070c0; width:116px" %)**1byte**
795 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
796
797 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.
798
799 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
800
801 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
802
803 Uplink Internal =5s, means LHT65N will send one packet every 5s. range 5~~255s.
804
805
806 === 2.6.5 Datalog Uplink payload ===
807
808
809 The Datalog poll reply uplink will use below payload format.
810
811 **Retrieval data payload:**
812
813 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
814 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
815 **Size(bytes)**
816 )))|=(% style="width: 90px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 90px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)**4**
817 |(% 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"]]
818
819 **Poll message flag & Ext:**
820
821 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
822
823 (% 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)
824
825 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
826
827 * Poll Message Flag is set to 1.
828
829 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
830
831 For example, in US915 band, the max payload for different DR is:
832
833 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
834
835 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
836
837 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
838
839 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
840
841 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
842
843
844 **Example:**
845
846 If LHT65N has below data inside Flash:
847
848 [[image:image-20230426171833-4.png]]
849
850
851 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
852
853 Where : Start time: 60065F97 = time 21/1/19 04:27:03
854
855 Stop time: 60066DA7= time 21/1/19 05:27:03
856
857
858 **LHT65N will uplink this payload.**
859
860 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
861
862
863 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
864
865 Where the first 11 bytes is for the first entry:
866
867 7FFF089801464160065F97
868
869 Ext sensor data=0x7FFF/100=327.67
870
871 Temp=0x088E/100=22.00
872
873 Hum=0x014B/10=32.6
874
875 poll message flag & Ext=0x41,means reply data,Ext=1
876
877 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
878
879
880 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
881
882
883 (((
884 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.
885 )))
886
887 (((
888 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
889
890
891 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
892
893
894 **Internal GXHT30 temperature alarm(Acquisition time: fixed at one minute)**
895
896 (((
897 (% class="box infomessage" %)
898 (((
899 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
900
901 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
902
903 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
904
905 (% _mstmutation="1" %)**AT+ARTEMP=? **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
906
907 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
908
909 **AT+LEDALARM=1** :       Enable LED visual Alarm.
910 )))
911 )))
912
913 (% style="color:#4f81bd" %)**Downlink Command:**
914
915 AT+WMOD=1:  A501  , AT+WMOD=0 :  A600
916
917 AT+CITEMP=1 : A60001
918
919 AT+ARTEMP=1,60  :  A70001003C
920
921 AT+ARTEMP=-16,60 :  A7FFF0003C
922
923 AT+LEDALARM=1  :  3601
924
925
926 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
927
928 Total bytes: 8 bytes
929
930 **Example: **AA0100010001003C
931
932 WMOD=01
933
934 CITEMP=0001
935
936 TEMPlow=0001
937
938 TEMPhigh=003C
939
940
941 **DS18B20 and TMP117 Threshold Alarm**
942
943 **~ AT+WMOD=1,60,-10,20**
944
945 (% style="color:#4f81bd" %)**Downlink Command:**
946
947 **Example: **A5013CFC180014
948
949 MOD=01
950
951 CITEMP=3C(S)
952
953 TEMPlow=FC18
954
955 TEMPhigh=0014
956
957
958 **Fluctuation alarm for DS18B20 and TMP117(Acquisition time: minimum 1s)**
959
960 **AT+WMOD=2,60,5** 
961
962 (% style="color:#4f81bd" %)**Downlink Command:**
963
964 **Example: **A5023C05
965
966 MOD=02
967
968 CITEMP=3C(S)
969
970 temperature fluctuation=05
971
972
973 **Sampling multiple times and uplink together**
974
975 **AT+WMOD=3,1,60,20,-16,32,1**   
976
977 Explain:
978
979 * (% style="color:#037691" %)**parameter1: **(%%)Set Working Mode to **Mode 3**
980 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
981 * (% style="color:#037691" %)**parameter3: **(%%)Sampling Interval is **60**s.
982 * (% style="color:#037691" %)**parameter4: **(%%)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)
983 * (% style="color:#037691" %)**parameter5 & parameter6: **(%%)Temperature alarm range is **-16** to **32**°C,
984 * (% style="color:#037691" %)**parameter7:**(%%) 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.
985
986 (% style="color:#4f81bd" %)**Downlink Command:**
987
988 **Example: **A50301003C14FFF0002001
989
990 MOD=03
991
992 TEMP=DS18B20
993
994 CITEMP=003C(S)
995
996 Total number of acquisitions=14
997
998 TEMPlow=FFF0
999
1000 TEMPhigh=0020
1001
1002 ARTEMP=01
1003
1004
1005 **Uplink payload( Fport=3)**
1006
1007 **Example: CBEA**01**0992**//0A41//**09C4**
1008
1009 BatV=CBEA
1010
1011 TEMP=DS18B20
1012
1013 Temp1=0992  ~/~/ 24.50℃
1014
1015 Temp2=0A41  ~/~/ 26.25℃
1016
1017 Temp3=09C4  ~/~/ 25.00℃
1018
1019 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
1020
1021 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
1022 )))
1023
1024
1025 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
1026
1027
1028 (% class="box infomessage" %)
1029 (((
1030 (((
1031 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
1032 )))
1033
1034 (((
1035 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
1036 )))
1037
1038 (((
1039 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
1040 )))
1041
1042 (((
1043 (% _mstmutation="1" %)**AT+ARTEMP=? **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
1044 )))
1045
1046 (((
1047 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
1048 )))
1049 )))
1050
1051 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
1052
1053 Total bytes: 8 bytes
1054
1055 **Example:**AA0100010001003C
1056
1057 WMOD=01
1058
1059 CITEMP=0001
1060
1061 TEMPlow=0001
1062
1063 TEMPhigh=003C
1064
1065
1066 == 2.8 LED Indicator ==
1067
1068
1069 The LHT65 has a triple color LED which for easy showing different stage .
1070
1071 While user press ACT button, the LED will work as per LED status with ACT button.
1072
1073 In a normal working state:
1074
1075 * For each uplink, the BLUE LED or RED LED will blink once.
1076 BLUE LED when external sensor is connected.
1077 * RED LED when external sensor is not connected
1078 * For each success downlink, the PURPLE LED will blink once
1079
1080
1081
1082 == 2.9 installation ==
1083
1084
1085 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
1086
1087
1088 = 3. Sensors and Accessories =
1089
1090 == 3.1 E2 Extension Cable ==
1091
1092
1093 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
1094
1095
1096 **1m long breakout cable for LHT65N. Features:**
1097
1098 * (((
1099 Use for AT Command, works for both LHT52/LHT65N
1100 )))
1101 * (((
1102 Update firmware for LHT65N, works for both LHT52/LHT65N
1103 )))
1104 * (((
1105 Supports ADC mode to monitor external ADC
1106 )))
1107 * (((
1108 Supports Interrupt mode
1109 )))
1110 * (((
1111 Exposed All pins from the LHT65N Type-C connector.
1112
1113
1114
1115 )))
1116
1117 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1118
1119
1120 == 3.2 E3 Temperature Probe ==
1121
1122
1123 [[image:image-20220515080154-4.png||_mstalt="434681" alt="photo-20220515080154-4.png" height="182" width="161"]] [[image:image-20220515080330-5.png||_mstalt="428792" height="201" width="195"]]
1124
1125
1126 Temperature sensor with 2 meters cable long
1127
1128 * Resolution: 0.0625 °C
1129 * ±0.5°C accuracy from -10°C to +85°C
1130 * ±2°C accuracy from -55°C to +125°C
1131 * Operating Range: -40 ~~ 125 °C
1132 * Working voltage 2.35v ~~ 5v
1133
1134
1135
1136 == 3.3 E31F Temperature Probe ==
1137
1138
1139 [[image:65N-E31F-1.jpg||height="169" width="170"]] [[image:65N-E31F.jpg||height="196" width="198"]]
1140
1141
1142 Temperature sensor with 1 meters cable long
1143
1144 **Built-in Temperature Sensor:**
1145
1146 * Resolution: 0.01 °C
1147 * Accuracy Tolerance : Typ ±0.3 °C
1148 * Long Term Drift: < 0.02 °C/yr
1149 * Operating Range: -40 ~~ 80 °C
1150
1151 **Built-in Humidity Sensor:**
1152
1153 * Resolution: 0.04 % RH
1154 * Accuracy Tolerance : Typ ±3 % RH
1155 * Long Term Drift: < 0.02 °C/yr
1156 * Operating Range: 0 ~~ 96 % RH
1157
1158 **External Temperature Sensor :**
1159
1160 * Resolution: 0.01 °C
1161 * Accuracy Tolerance : Typical ±0.3 °C
1162 * Long Term Drift: < 0.02 °C/yr
1163 * Operating Range: -40 ~~ 125 °C
1164
1165 **External Humidity Sensor :**
1166
1167 * Resolution: 0.04 % RH
1168 * Accuracy Tolerance : Typ ±3 % RH
1169 * Long Term Drift: < 0.02 °C/yr
1170 * Operating Range: 0 ~~ 96 % RH
1171
1172
1173
1174 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1175
1176
1177 (((
1178 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1179 )))
1180
1181 * (((
1182 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1183 )))
1184
1185 * (((
1186 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1187 )))
1188
1189 (((
1190 There are two kinds of commands to configure LHT65N, they are:
1191 )))
1192
1193 * (((
1194 (% style="color:#4f81bd" %)**General Commands**.
1195 )))
1196
1197 (((
1198 These commands are to configure:
1199 )))
1200
1201 1. (((
1202 General system settings like: uplink interval.
1203 )))
1204 1. (((
1205 LoRaWAN protocol & radio-related commands.
1206 )))
1207
1208 (((
1209 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]]
1210 )))
1211
1212 * (((
1213 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1214 )))
1215
1216 (((
1217 These commands are only valid for LHT65N, as below:
1218 )))
1219
1220
1221 == 4.1 Set Transmit Interval Time ==
1222
1223
1224 Feature: Change LoRaWAN End Node Transmit Interval.
1225
1226
1227 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1228
1229 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1230 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:166px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:180px" %)**Response**
1231 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1232 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1233
1234 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1235
1236 Format: Command Code (0x01) followed by 3 bytes time value.
1237
1238 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1239
1240 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1241
1242 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1243
1244
1245
1246 == 4.2 Set External Sensor Mode ==
1247
1248
1249 Feature: Change External Sensor Mode.
1250
1251
1252 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1253
1254
1255 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1256 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:153px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:160px" %)**Response**
1257 |(% style="width:155px" %)AT+EXT=?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1258 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1259 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1260
1261 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1262
1263 Total bytes: 2 ~~ 5 bytes
1264
1265 **Example:**
1266
1267 * 0xA201: Set external sensor type to E1
1268
1269 * 0xA209: Same as AT+EXT=9
1270
1271 * 0xA20702003c: Same as AT+SETCNT=60
1272
1273
1274
1275 == 4.3 Enable/Disable uplink Temperature probe ID ==
1276
1277
1278 (((
1279 Feature: If PID is enabled, device will send the temperature probe ID on:
1280 )))
1281
1282 * (((
1283 First Packet after OTAA Join
1284 )))
1285 * (((
1286 Every 24 hours since the first packet.
1287 )))
1288
1289 (((
1290 PID is default set to disable (0)
1291
1292
1293 )))
1294
1295 (% style="color:#4f81bd" %)**AT Command:**
1296
1297 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1298 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:138px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:88px" %)**Response**
1299 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1300
1301 (% style="color:#4f81bd" %)**Downlink Command:**
1302
1303 * **0xA800**  **~-~->** AT+PID=0
1304 * **0xA801**     **~-~->** AT+PID=1
1305
1306
1307
1308 == 4.4 Set Password ==
1309
1310
1311 Feature: Set device password, max 9 digits
1312
1313 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1314
1315 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1316 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:128px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:89px" %)**Response**
1317 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1318 123456
1319
1320 OK
1321 )))
1322 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1323
1324 (% style="color:#4f81bd" %)**Downlink Command:**
1325
1326 No downlink command for this feature.
1327
1328
1329 == 4.5 Quit AT Command ==
1330
1331
1332 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1333
1334 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1335
1336 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1337 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:191px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:86px" %)**Response**
1338 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1339
1340 (% style="color:#4f81bd" %)**Downlink Command:**
1341
1342 No downlink command for this feature.
1343
1344
1345 == 4.6 Set to sleep mode ==
1346
1347
1348 Feature: Set device to sleep mode
1349
1350 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1351 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1352
1353 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1354
1355 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
1356 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:140px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:218px" %)**Response**
1357 |(% style="width:155px" %)AT+SLEEP|(% style="width:139px" %)Set to sleep mode|(% style="width:213px" %)(((
1358 Clear all stored sensor data…
1359
1360 OK
1361 )))
1362
1363 (% style="color:#4f81bd" %)**Downlink Command:**
1364
1365 * There is no downlink command to set to Sleep mode.
1366
1367
1368
1369 == 4.7 Set system time ==
1370
1371
1372 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1373
1374 (% style="color:#4f81bd" %)**AT Command:**
1375
1376 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1377 |(% style="background-color:#d9e2f3; color:#0070c0; width:188px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:318px" %)**Function**
1378 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1379 OK
1380
1381 Set System time to 2021-01-20 00:59:12
1382 )))
1383
1384 (% style="color:#4f81bd" %)**Downlink Command:**
1385
1386 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1387
1388
1389 == 4.8 Set Time Sync Mode ==
1390
1391
1392 (((
1393 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1394 )))
1395
1396 (((
1397 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.
1398 )))
1399
1400 (% style="color:#4f81bd" %)**AT Command:**
1401
1402 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1403 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1404 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1405
1406 (% style="color:#4f81bd" %)**Downlink Command:**
1407
1408 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1409 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1410
1411
1412 == 4.9 Set Time Sync Interval ==
1413
1414
1415 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1416
1417 (% style="color:#4f81bd" %)**AT Command:**
1418
1419 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1420 |(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:314px" %)**Function**
1421 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1422
1423 (% style="color:#4f81bd" %)**Downlink Command:**
1424
1425 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1426
1427
1428 == 4.10 Print data entries base on page. ==
1429
1430
1431 Feature: Print the sector data from start page to stop page (max is 416 pages).
1432
1433 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1434
1435 [[image:image-20230426164330-2.png]]
1436
1437 (% style="color:#4f81bd" %)**Downlink Command:**
1438
1439 No downlink commands for feature
1440
1441
1442 == 4.11 Print last few data entries. ==
1443
1444
1445 Feature: Print the last few data entries
1446
1447 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1448
1449 [[image:image-20230426164932-3.png]]
1450
1451 (% style="color:#4f81bd" %)**Downlink Command:**
1452
1453 No downlink commands for feature
1454
1455
1456 == 4.12 Clear Flash Record ==
1457
1458
1459 Feature: Clear flash storage for data log feature.
1460
1461
1462 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1463
1464
1465 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1466 |(% style="background-color:#d9e2f3; color:#0070c0; width:157px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:137px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:209px" %)**Response**
1467 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1468 Clear all stored sensor data…
1469
1470 OK
1471 )))
1472
1473 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1474
1475 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1476
1477
1478
1479 == 4.13 Auto Send None-ACK messages ==
1480
1481
1482 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.
1483
1484 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1485
1486 The default factory setting is 0
1487
1488 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1489 |=(% style="width: 158px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 87px;background-color:#D9E2F3;color:#0070C0" %)**Response**
1490 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1491
1492 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1493
1494 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1495
1496
1497
1498 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm(Since firmware 1.3.0) ==
1499
1500
1501 Feature: Set internal and external temperature sensor alarms.
1502
1503 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1504 |=(% style="width: 250px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 200px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**Response**
1505 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1506
1507 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1508
1509 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1510
1511 0): Cancel
1512
1513 1): Threshold alarm
1514
1515 2): Fluctuation alarm
1516
1517
1518 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1519
1520 (% 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.**
1521
1522
1523 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1524
1525 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1526
1527 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1528
1529
1530 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.
1531
1532 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1533
1534 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1535
1536
1537 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1538
1539 0xA5 00 ~-~- AT+WMOD=0.
1540
1541 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 )
1542
1543 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))
1544
1545 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1546
1547 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.
1548
1549
1550 = 5. Battery & How to replace =
1551
1552 == 5.1 Battery Type ==
1553
1554
1555 (((
1556 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.
1557 )))
1558
1559 (((
1560 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1561
1562
1563 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1564 )))
1565
1566 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1567
1568
1569 == 5.2 Replace Battery ==
1570
1571
1572 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.
1573
1574 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1575
1576
1577 == 5.3 Battery Life Analyze ==
1578
1579
1580 (((
1581 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:
1582 [[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]]
1583 )))
1584
1585
1586 (((
1587 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]]
1588 )))
1589
1590
1591 = 6. FAQ =
1592
1593 == 6.1 How to use AT Command? ==
1594
1595
1596 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.
1597
1598 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1599
1600
1601 **Connection:**
1602
1603 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1604 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1605 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1606
1607 (((
1608 (% _mstmutation="1" style="color:red" %)**(Note: This pin only corresponds to the lead-out board sold by dragino company. For the lead-out board purchased by yourself, please refer to the pin description in Chapter 6.6)**
1609
1610 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.
1611 )))
1612
1613
1614 Input password and ATZ to activate LHT65N,As shown below:
1615
1616 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1617
1618
1619 AT Command List is as below:
1620
1621 AT+<CMD>? :  Help on <CMD>
1622
1623 AT+<CMD> :  Run <CMD>
1624
1625 AT+<CMD>=<value> :  Set the value
1626
1627 AT+<CMD>=? :  Get the value
1628
1629 AT+DEBUG:  Set more info output
1630
1631 ATZ:  Trig a reset of the MCU
1632
1633 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1634
1635 AT+DEUI:  Get or Set the Device EUI
1636
1637 AT+DADDR:  Get or Set the Device Address
1638
1639 AT+APPKEY:  Get or Set the Application Key
1640
1641 AT+NWKSKEY:  Get or Set the Network Session Key
1642
1643 AT+APPSKEY:  Get or Set the Application Session Key
1644
1645 AT+APPEUI:  Get or Set the Application EUI
1646
1647 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1648
1649 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1650
1651 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1652
1653 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1654
1655 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1656
1657 AT+RX2FQ:  Get or Set the Rx2 window frequency
1658
1659 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1660
1661 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1662
1663 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1664
1665 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1666
1667 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1668
1669 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1670
1671 AT+NWKID:  Get or Set the Network ID
1672
1673 AT+FCU:  Get or Set the Frame Counter Uplink
1674
1675 AT+FCD:  Get or Set the Frame Counter Downlink
1676
1677 AT+CLASS:  Get or Set the Device Class
1678
1679 AT+JOIN:  Join network
1680
1681 AT+NJS:  Get the join status
1682
1683 AT+SENDB:  Send hexadecimal data along with the application port
1684
1685 AT+SEND:  Send text data along with the application port
1686
1687 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1688
1689 AT+RECV:  Print last received data in raw format
1690
1691 AT+VER:  Get current image version and Frequency Band
1692
1693 AT+CFM:  Get or Set the confirmation mode (0-1)
1694
1695 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1696
1697 AT+SNR:  Get the SNR of the last received packet
1698
1699 AT+RSSI:  Get the RSSI of the last received packet
1700
1701 AT+TDC:  Get or set the application data transmission interval in ms
1702
1703 AT+PORT:  Get or set the application port
1704
1705 AT+DISAT:  Disable AT commands
1706
1707 AT+PWORD: Set password, max 9 digits
1708
1709 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1710
1711 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1712
1713 AT+PDTA:  Print the sector data from start page to stop page
1714
1715 AT+PLDTA:  Print the last few sets of data
1716
1717 AT+CLRDTA:  Clear the storage, record position back to 1st
1718
1719 AT+SLEEP:  Set sleep mode
1720
1721 AT+EXT:  Get or Set external sensor model
1722
1723 AT+BAT:  Get the current battery voltage in mV
1724
1725 AT+CFG:  Print all configurations
1726
1727 AT+WMOD:  Get or Set Work Mode
1728
1729 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1730
1731 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1732
1733 AT+SETCNT:  Set the count at present
1734
1735 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1736
1737 AT+RPL:  Get or set response level
1738
1739 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1740
1741 AT+LEAPSEC:  Get or Set Leap Second
1742
1743 AT+SYNCMOD:  Get or Set time synchronization method
1744
1745 AT+SYNCTDC:  Get or set time synchronization interval in day
1746
1747 AT+PID:  Get or set the PID
1748
1749
1750 == 6.2 Where to use AT commands and Downlink commands ==
1751
1752
1753 **AT commands: **
1754
1755 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1756
1757
1758 **Downlink commands:**
1759
1760
1761 (% style="color:blue" %)**TTN:**
1762
1763 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1764
1765
1766
1767 (% style="color:blue" %)**Helium: **
1768
1769 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1770
1771
1772
1773 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1774
1775
1776 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1777
1778
1779 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1780
1781
1782
1783 (% style="color:blue" %)**Aws:**
1784
1785 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1786
1787
1788 == 6.3 How to change the uplink interval? ==
1789
1790
1791 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/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1792
1793
1794 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1795
1796
1797 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1798
1799 [[image:1655802313617-381.png||_mstalt="293917"]]
1800
1801
1802 (((
1803 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.
1804 )))
1805
1806
1807 Input password and ATZ to activate LHT65N, As shown below:
1808
1809 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1810
1811
1812 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1813
1814
1815 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1816
1817
1818 (% style="color:blue" %)**Step1**(%%): Install [[TremoProgrammer>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AAAnJD_qGZ42bB52o4UmH9v9a/LHT65N%20Temperature%20%26%20Humidity%20Sensor/tool?dl=0&subfolder_nav_tracking=1]]  first.
1819
1820 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1821
1822
1823
1824 (% _mstmutation="1" style="color:blue" %)**Step2**(%%): wiring method.(% style="display:none" %)
1825
1826 First connect the four lines;(% style="display:none" %)
1827
1828 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]],(% style="display:none" %)
1829
1830
1831 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1832
1833 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1834
1835
1836
1837 (% style="color:blue" %)**Step3: **(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1838
1839 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1840
1841
1842 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1843
1844
1845 When this interface appears, it indicates that the download has been completed.
1846
1847 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1848
1849
1850 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1851
1852
1853 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1854
1855
1856 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1857
1858
1859 **UART Port of LHT65N:**
1860
1861 * (% class="mark" %)**PB0: RXD**
1862 * (% class="mark" %)**PB1: TXD**
1863 * (% class="mark" %)**GND**
1864
1865 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1866
1867
1868 (((
1869 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.
1870 )))
1871
1872
1873 Input password and ATZ to activate LHT65N,As shown below:
1874
1875 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1876
1877
1878 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1879
1880
1881 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1882
1883
1884 (% style="color:blue" %)**Step1**(%%): Install [[TremoProgrammer>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AAAnJD_qGZ42bB52o4UmH9v9a/LHT65N%20Temperature%20%26%20Humidity%20Sensor/tool?dl=0&subfolder_nav_tracking=1]]  first.
1885
1886 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1887
1888
1889
1890 (% _mstmutation="1" style="color:blue" %)**Step2**(%%): wiring method.(% style="display:none" %)
1891
1892 First connect the four lines;
1893
1894 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1895
1896 Connect A8 and GND with Dupont wire for a while and then separate, enter reset mode
1897
1898
1899
1900 (% style="color:blue" %)**Step3: **(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1901
1902 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1903
1904
1905 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1906
1907
1908 When this interface appears, it indicates that the download has been completed.
1909
1910 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1911
1912
1913 Finally,Disconnect 3.3v, Connect A8 and GND with Dupont wire for a while and then separate, exit reset mode
1914
1915
1916 == 6.8 Why can't I see the datalog information ==
1917
1918
1919 ~1. The time is not aligned, and the correct query command is not used.
1920
1921 2. Decoder error, did not parse the datalog data, the data was filtered.
1922
1923
1924 = 7. Order Info =
1925
1926
1927 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1928
1929 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1930
1931 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1932 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1933 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1934 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1935 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1936 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1937 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1938 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1939
1940 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1941
1942 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1943
1944
1945
1946 = 8. Packing Info =
1947
1948
1949 **Package Includes**:
1950
1951 * LHT65N Temperature & Humidity Sensor x 1
1952 * Optional external sensor
1953
1954 **Dimension and weight**:
1955
1956 * Device Size:  10 x 10 x 3.5 mm
1957 * Device Weight: 120.5g
1958
1959
1960
1961 = 9. Reference material =
1962
1963
1964 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1965
1966
1967
1968 = 10. FCC Warning =
1969
1970
1971 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1972
1973 (1) This device may not cause harmful interference;
1974
1975 (2) this device must accept any interference received, including interference that may cause undesired operation.

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