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Version 253.1 by Bei Jinggeng on 2023/06/30 15:44
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
5
6
7
8 **Table of Contents:**
9
10 {{toc/}}
11
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 == 1.3 Specification ==
62
63
64 (% style="color:#037691" %)**Built-in Temperature Sensor:**
65
66 * Resolution: 0.01 °C
67 * Accuracy Tolerance : Typ ±0.3 °C
68 * Long Term Drift: < 0.02 °C/yr
69 * Operating Range: -40 ~~ 85 °C
70
71 (% style="color:#037691" %)**Built-in Humidity Sensor:**
72
73 * Resolution: 0.04 %RH
74 * Accuracy Tolerance : Typ ±3 %RH
75 * Long Term Drift: < 0.02 °C/yr
76 * Operating Range: 0 ~~ 96 %RH
77
78 (% style="color:#037691" %)**External Temperature Sensor:**
79
80 * Resolution: 0.0625 °C
81 * ±0.5°C accuracy from -10°C to +85°C
82 * ±2°C accuracy from -55°C to +125°C
83 * Operating Range: -55 °C ~~ 125 °C
84
85
86 = 2. Connect LHT65N to IoT Server =
87
88 == 2.1 How does LHT65N work? ==
89
90
91 (((
92 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.
93 )))
94
95 (((
96 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.
97 )))
98
99
100 == 2.2 How to Activate LHT65N? ==
101
102
103 (((
104 The LHT65N has two working modes:
105 )))
106
107 * (((
108 (% 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.
109 )))
110 * (((
111 (% 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. 
112 )))
113
114 (((
115 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
116 )))
117
118
119 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
120
121 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
122 |=(% 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**
123 |(% 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" %)(((
124 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.
125 )))
126 |(% 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" %)(((
127 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
128 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
129 )))
130 |(% 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.
131
132
133 == 2.3 Example to join LoRaWAN network ==
134
135
136 (% class="wikigeneratedid" %)
137 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.
138
139
140 (% class="wikigeneratedid" %)
141 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
142
143
144 (((
145 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:
146 )))
147
148
149 === 2.3.1 Step 1: Create Device n TTN ===
150
151
152 (((
153 Create a device in TTN V3 with the OTAA keys from LHT65N.
154 )))
155
156 (((
157 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
158 )))
159
160 [[image:image-20230426083319-1.png||height="258" width="556"]]
161
162 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
163
164 Add APP EUI in the application.
165
166
167 [[image:image-20220522232916-3.png||_mstalt="430495"]]
168
169
170 [[image:image-20220522232932-4.png||_mstalt="430157"]]
171
172
173 [[image:image-20220522232954-5.png||_mstalt="431847"]]
174
175
176
177 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
178
179
180 [[image:image-20220522233026-6.png||_mstalt="429403"]]
181
182
183 Input APP EUI,  APP KEY and DEV EUI:
184
185
186 [[image:image-20220522233118-7.png||_mstalt="430430"]]
187
188
189 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
190
191
192 (((
193 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.
194 )))
195
196 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
197
198
199 == 2.4 Uplink Payload (Fport~=2) ==
200
201
202 (((
203 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
204 )))
205
206 (((
207 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
208 )))
209
210 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
211 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
212 **Size(bytes)**
213 )))|=(% style="width: 30px;background-color:#D9E2F3;color:#0070C0" %)(((
214 **2**
215 )))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)(((
216 **2**
217 )))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)(((
218 **2**
219 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
220 **1**
221 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
222 **4**
223 )))
224 |(% style="width:97px" %)(((
225 **Value**
226 )))|(% style="width:39px" %)(((
227 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
228 )))|(% style="width:100px" %)(((
229 (((
230 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
231 )))
232 )))|(% style="width:77px" %)(((
233 (((
234 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
235 )))
236 )))|(% style="width:47px" %)(((
237 [[Ext>>||anchor="H2.4.5Ext23"]] #
238 )))|(% style="width:51px" %)(((
239 [[Ext value>>||anchor="H2.4.6Extvalue"]]
240 )))
241
242 * The First 6 bytes: has fix meanings for every LHT65N.
243
244 * The 7th byte (EXT #): defines the external sensor model.
245
246 * 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.)
247
248
249 === 2.4.1 Decoder in TTN V3 ===
250
251
252 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.
253
254 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]]
255
256
257 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
258
259
260 === 2.4.2 BAT-Battery Info ===
261
262
263 These two bytes of BAT include the battery state and the actually voltage.
264
265 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
266 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
267 **Bit(bit)**
268 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
269 |(% style="width:66px" %)(((
270 **Value**
271 )))|(% style="width:250px" %)(((
272 BAT Status
273 00(b): Ultra Low ( BAT <= 2.50v)
274 01(b): Low (2.50v <=BAT <= 2.55v)
275 10(b): OK (2.55v <= BAT <=2.65v)
276 11(b): Good (BAT >= 2.65v)
277 )))|(% style="width:152px" %)Actually BAT voltage
278
279 **(b)stands for binary**
280
281
282 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
283
284
285 Check the battery voltage for LHT65N.
286
287 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
288
289 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
290
291
292 === 2.4.3 Built-in Temperature ===
293
294
295 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
296
297 * Temperature:  0x0ABB/100=27.47℃
298
299 [[image:image-20220522235639-3.png||_mstalt="432120"]]
300
301 * Temperature:  (0xF5C6-65536)/100=-26.18℃
302
303 (% style="display:none" %)
304
305 === 2.4.4 Built-in Humidity ===
306
307
308 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
309
310 * Humidity:    0x025C/10=60.4%
311
312 (% style="display:none" %)
313
314 === 2.4.5 Ext # ===
315
316
317 Bytes for External Sensor:
318
319 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
320 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # **Value|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)External Sensor Type
321 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
322 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
323
324
325 === 2.4.6 Ext value ===
326
327 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
328
329
330 [[image:image-20220522235639-5.png||_mstalt="432848"]]
331
332
333 * DS18B20 temp=0x0ADD/100=27.81℃
334
335 The last 2 bytes of data are meaningless
336
337
338
339 [[image:image-20220522235639-6.png||_mstalt="433212"]]
340
341
342 * External temperature= (0xF54F-65536)/100=-27.37℃
343
344 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
345
346 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
347
348 The last 2 bytes of data are meaningless
349
350 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
351
352
353
354 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
355
356
357 (((
358 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:
359 )))
360
361
362 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
363 |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
364 **Size(bytes)**
365 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
366 **2**
367 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
368 **2**
369 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
370 **2**
371 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
372 **1**
373 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
374 **4**
375 )))
376 |(% style="width:110px" %)(((
377 **Value**
378 )))|(% style="width:71px" %)(((
379 External temperature
380 )))|(% style="width:99px" %)(((
381 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
382 )))|(% style="width:132px" %)(((
383 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
384 )))|(% style="width:54px" %)(((
385 Status & Ext
386 )))|(% style="width:64px" %)(((
387 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
388 )))
389
390 * **Battery status & Built-in Humidity**
391
392 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
393 |=(% 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]
394 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
395 BAT Status
396 00(b): Ultra Low ( BAT <= 2.50v)
397 01(b): Low  (2.50v <=BAT <= 2.55v)
398 10(b): OK   (2.55v <= BAT <=2.65v)
399 11(b): Good   (BAT >= 2.65v)
400 )))|(% style="width:132px" %)(((
401 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
402 )))
403
404 * **Status & Ext Byte**
405
406 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
407 |(% 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]**
408 |(% 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)
409
410 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
411 * (% 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.
412 * (% 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)
413
414
415 ==== 2.4.6.3 Ext~=6, ADC Sensor(use with E2 Cable) ====
416
417
418 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
419
420 be used to power the external ADC sensor; user can control the power on time for this
421
422 (% style="color:blue" %)**sensor by setting:**
423
424 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
425
426 **For example:**
427
428 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
429
430
431 Or use **downlink command A2** to set the same.
432
433 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
434
435 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.
436
437 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
438
439
440 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
441
442 [[image:image-20220628150714-4.png||_mstalt="431054"]]
443
444
445 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.
446
447
448 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
449
450 [[image:image-20220628151005-5.png||_mstalt="429546"]]
451
452
453 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
454
455 [[image:image-20220628151056-6.png||_mstalt="431873"]]
456
457
458 3) Within range
459
460 [[image:image-20220628151143-7.png||_mstalt="431210"]]
461
462
463
464 ==== 2.4.6.4 Ext~=2 TMP117 Sensor(Since Firmware v1.3) ====
465
466
467 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
468
469
470 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
471
472 [[image:image-20220906102307-7.png||_mstalt="430443"]]
473
474
475 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
476
477 The external cable NE2 can be use for MOD4 and MOD8
478
479
480
481 ==== 2.4.6.5 Ext~=11 SHT31 Sensor (Since Firmware v1.4.1) ====
482
483
484 [[image:65N-E31F.jpg||height="454" width="459"]]
485
486
487 (% style="color:blue" %)**Ext=11,Temperature & Humidity Sensor(SHT31)：**
488
489 [[image:SHT31.png]]
490
491
492
493 ==== 2.4.6.6 Ext~=4 Interrupt Mode(Since Firmware v1.3) ====
494
495
496 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
497
498
499 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
500
501 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
502
503 In Open State, the power consumption is the same as if there is no probe
504
505 In Close state, the power consumption will be 3uA higher than normal.
506
507 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
508
509
510 Ext=4,Interrupt Sensor：
511
512 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
513 |(% style="width:101px" %)(((
514 **AT+EXT=4,1**
515 )))|(% style="width:395px" %)(((
516 **Sent uplink packet in both rising and falling interrupt**
517 )))
518 |(% style="width:101px" %)(((
519 **AT+EXT=4,2**
520 )))|(% style="width:395px" %)(((
521 **Sent uplink packet only in falling interrupt**
522 )))
523 |(% style="width:101px" %)(((
524 **AT+EXT=4,3**
525 )))|(% style="width:395px" %)(((
526 **Sent uplink packet only in rising interrupt**
527 )))
528
529 Trigger by falling edge:
530
531 [[image:image-20220906101145-2.png||_mstalt="428324"]]
532
533
534 Trigger by raising edge：
535
536 [[image:image-20220906101145-3.png||_mstalt="428688"]]
537
538
539
540 ==== 2.4.6.7 Ext~=8 Counting Mode(Since Firmware v1.3) ====
541
542
543 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
544
545
546 (% 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.
547
548 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
549
550
551 (% 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
552
553 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
554
555
556 Ext=8, Counting Sensor ( 4 bytes)：
557
558 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
559 |(% style="width:131px" %)(((
560 **AT+EXT=8,0**
561 )))|(% style="width:195px" %)(((
562 **Count at falling interrupt**
563 )))
564 |(% style="width:131px" %)(((
565 **AT+EXT=8,1**
566 )))|(% style="width:195px" %)(((
567 **Count at rising interrupt**
568 )))
569 |(% style="width:131px" %)(((
570 **AT+SETCNT=60**
571 )))|(% style="width:195px" %)(((
572 **Sent current count to 60**
573 )))
574
575 [[image:image-20220906101320-6.png||_mstalt="428064"]]
576
577
578 (% style="color:blue" %)**A2 downlink Command：**
579
580 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
581
582 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
583
584 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
585
586 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
587
588 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)
589
590
591 ==== 2.4.6.8 Ext~=10, E2 sensor (TMP117)with Unix Timestamp(Since firmware V1.3.2) ====
592
593
594 (((
595 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:
596 )))
597
598
599 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
600 |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
601 **Size(bytes)**
602 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
603 **2**
604 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
605 **2**
606 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
607 **2**
608 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
609 **1**
610 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
611 **4**
612 )))
613 |(% style="width:110px" %)(((
614 **Value**
615 )))|(% style="width:71px" %)(((
616 External temperature
617 )))|(% style="width:99px" %)(((
618 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
619 )))|(% style="width:132px" %)(((
620 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
621 )))|(% style="width:54px" %)(((
622 Status & Ext
623 )))|(% style="width:64px" %)(((
624 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
625 )))
626
627 * **Battery status & Built-in Humidity**
628
629 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
630 |=(% 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]
631 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
632 BAT Status
633 00(b): Ultra Low ( BAT <= 2.50v)
634 01(b): Low  (2.50v <=BAT <= 2.55v)
635 10(b): OK   (2.55v <= BAT <=2.65v)
636 11(b): Good   (BAT >= 2.65v)
637 )))|(% style="width:132px" %)(((
638 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
639 )))
640
641 * **Status & Ext Byte**
642
643 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
644 |(% 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]**
645 |(% 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)
646
647 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
648 * (% 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.
649 * (% 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)
650
651
652 == 2.5 Show data on Datacake ==
653
654
655 (((
656 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:
657 )))
658
659
660 (((
661 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
662 )))
663
664 (((
665 (% 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.
666 )))
667
668
669 (((
670 Add Datacake:
671 )))
672
673
674 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
675
676
677
678 Select default key as Access Key:
679
680
681 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
682
683
684 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
685
686
687 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
688
689
690 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
691
692
693 == 2.6 Datalog Feature ==
694
695
696 (((
697 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.
698 )))
699
700
701 === 2.6.1 Ways to get datalog via LoRaWAN ===
702
703
704 There are two methods:
705
706 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
707
708
709 (% 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.
710
711
712 (% style="color:red" %)**Note for method 2:**
713
714 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
715 * 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.
716
717 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
718
719
720 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
721
722
723 === 2.6.2 Unix TimeStamp ===
724
725
726 LHT65N uses Unix TimeStamp format based on
727
728
729 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
730
731
732
733 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
734
735 Below is the converter example
736
737 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
738
739
740 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
741
742
743 === 2.6.3 Set Device Time ===
744
745
746 (((
747 (% style="color:blue" %)**There are two ways to set device's time:**
748 )))
749
750 (((
751 **1.  Through LoRaWAN MAC Command (Default settings)**
752 )))
753
754 (((
755 User need to set SYNCMOD=1 to enable sync time via MAC command.
756 )))
757
758 (((
759 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).
760 )))
761
762 (((
763 (% 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.**
764 )))
765
766
767 (((
768 **2. Manually Set Time**
769 )))
770
771 (((
772 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
773 )))
774
775
776 === 2.6.4 Poll sensor value ===
777
778
779 User can poll sensor value based on timestamps from the server. Below is the downlink command.
780
781 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
782 |(% 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**
783 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
784
785 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.
786
787 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
788
789 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
790
791 Uplink Internal =5s, means LHT65N will send one packet every 5s. range 5~~255s.
792
793
794 === 2.6.5 Datalog Uplink payload ===
795
796
797 The Datalog poll reply uplink will use below payload format.
798
799 **Retrieval data payload:**
800
801 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
802 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
803 **Size(bytes)**
804 )))|=(% 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**
805 |(% 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"]]
806
807 **Poll message flag & Ext:**
808
809 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
810
811 (% 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)
812
813 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
814
815 * Poll Message Flag is set to 1.
816
817 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
818
819 For example, in US915 band, the max payload for different DR is:
820
821 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
822
823 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
824
825 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
826
827 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
828
829 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
830
831
832 **Example:**
833
834 If LHT65N has below data inside Flash:
835
836 [[image:image-20230426171833-4.png]]
837
838
839 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
840
841 Where : Start time: 60065F97 = time 21/1/19 04:27:03
842
843 Stop time: 60066DA7= time 21/1/19 05:27:03
844
845
846 **LHT65N will uplink this payload.**
847
848 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
849
850
851 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
852
853 Where the first 11 bytes is for the first entry:
854
855 7FFF089801464160065F97
856
857 Ext sensor data=0x7FFF/100=327.67
858
859 Temp=0x088E/100=22.00
860
861 Hum=0x014B/10=32.6
862
863 poll message flag & Ext=0x41,means reply data,Ext=1
864
865 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
866
867
868 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
869
870
871 (((
872 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.
873 )))
874
875 (((
876 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
877
878
879 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
880
881
882 **Internal GXHT30 temperature alarm(Acquisition time: fixed at one minute)**
883
884 (((
885 (% class="box infomessage" %)
886 (((
887 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
888
889 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
890
891 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
892
893 (% _mstmutation="1" %)**AT+ARTEMP=? **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
894
895 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
896
897 **AT+LEDALARM=1** :       Enable LED visual Alarm.
898 )))
899 )))
900
901 (% style="color:#4f81bd" %)**Downlink Command:**
902
903 AT+WMOD=1:  A501  , AT+WMOD=0 :  A600
904
905 AT+CITEMP=1 : A60001
906
907 AT+ARTEMP=1,60  :  A70001003C
908
909 AT+ARTEMP=-16,60 :  A7FFF0003C
910
911 AT+LEDALARM=1  :  3601
912
913
914 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
915
916 Total bytes: 8 bytes
917
918 **Example: **AA0100010001003C
919
920 WMOD=01
921
922 CITEMP=0001
923
924 TEMPlow=0001
925
926 TEMPhigh=003C
927
928
929 **DS18B20 and TMP117 Threshold Alarm**
930
931 **~ AT+WMOD=1,60,-10,20**
932
933 (% style="color:#4f81bd" %)**Downlink Command:**
934
935 **Example: **A5013CFC180014
936
937 MOD=01
938
939 CITEMP=3C(S)
940
941 TEMPlow=FC18
942
943 TEMPhigh=0014
944
945
946 **Fluctuation alarm for DS18B20 and TMP117(Acquisition time: minimum 1s)**
947
948 **AT+WMOD=2,60,5** 
949
950 (% style="color:#4f81bd" %)**Downlink Command:**
951
952 **Example: **A5023C05
953
954 MOD=02
955
956 CITEMP=3C(S)
957
958 temperature fluctuation=05
959
960
961 **Sampling multiple times and uplink together**
962
963 **AT+WMOD=3,1,60,20,-16,32,1**   
964
965 Explain:
966
967 * (% style="color:#037691" %)**parameter1: **(%%)Set Working Mode to **Mode 3**
968 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
969 * (% style="color:#037691" %)**parameter3: **(%%)Sampling Interval is **60**s.
970 * (% 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)
971 * (% style="color:#037691" %)**parameter5 & parameter6: **(%%)Temperature alarm range is **-16** to **32**°C,
972 * (% 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.
973
974 (% style="color:#4f81bd" %)**Downlink Command:**
975
976 **Example: **A50301003C14FFF0002001
977
978 MOD=03
979
980 TEMP=DS18B20
981
982 CITEMP=003C(S)
983
984 Total number of acquisitions=14
985
986 TEMPlow=FFF0
987
988 TEMPhigh=0020
989
990 ARTEMP=01
991
992
993 **Uplink payload( Fport=3)**
994
995 **Example: CBEA**01**0992**//0A41//**09C4**
996
997 BatV=CBEA
998
999 TEMP=DS18B20
1000
1001 Temp1=0992  ~/~/ 24.50℃
1002
1003 Temp2=0A41  ~/~/ 26.25℃
1004
1005 Temp3=09C4  ~/~/ 25.00℃
1006
1007 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
1008
1009 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
1010 )))
1011
1012
1013 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
1014
1015
1016 (% class="box infomessage" %)
1017 (((
1018 (((
1019 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
1020 )))
1021
1022 (((
1023 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
1024 )))
1025
1026 (((
1027 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
1028 )))
1029
1030 (((
1031 (% _mstmutation="1" %)**AT+ARTEMP=? **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
1032 )))
1033
1034 (((
1035 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
1036 )))
1037 )))
1038
1039 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
1040
1041 Total bytes: 8 bytes
1042
1043 **Example:**AA0100010001003C
1044
1045 WMOD=01
1046
1047 CITEMP=0001
1048
1049 TEMPlow=0001
1050
1051 TEMPhigh=003C
1052
1053
1054 == 2.8 LED Indicator ==
1055
1056
1057 The LHT65 has a triple color LED which for easy showing different stage .
1058
1059 While user press ACT button, the LED will work as per LED status with ACT button.
1060
1061 In a normal working state:
1062
1063 * For each uplink, the BLUE LED or RED LED will blink once.
1064 BLUE LED when external sensor is connected.
1065 * RED LED when external sensor is not connected
1066 * For each success downlink, the PURPLE LED will blink once
1067
1068
1069 == 2.9 installation ==
1070
1071
1072 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
1073
1074
1075 = 3. Sensors and Accessories =
1076
1077 == 3.1 E2 Extension Cable ==
1078
1079
1080 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
1081
1082
1083 **1m long breakout cable for LHT65N. Features:**
1084
1085 * (((
1086 Use for AT Command, works for both LHT52/LHT65N
1087 )))
1088 * (((
1089 Update firmware for LHT65N, works for both LHT52/LHT65N
1090 )))
1091 * (((
1092 Supports ADC mode to monitor external ADC
1093 )))
1094 * (((
1095 Supports Interrupt mode
1096 )))
1097 * (((
1098 Exposed All pins from the LHT65N Type-C connector.
1099
1100
1101
1102 )))
1103
1104 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1105
1106
1107 == 3.2 E3 Temperature Probe ==
1108
1109
1110 [[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"]]
1111
1112
1113 Temperature sensor with 2 meters cable long
1114
1115 * Resolution: 0.0625 °C
1116 * ±0.5°C accuracy from -10°C to +85°C
1117 * ±2°C accuracy from -55°C to +125°C
1118 * Operating Range: -40 ~~ 125 °C
1119 * Working voltage 2.35v ~~ 5v
1120
1121
1122 == 3.3 E31F Temperature Probe ==
1123
1124
1125 [[image:65N-E31F-1.jpg||height="169" width="170"]] [[image:65N-E31F.jpg||height="196" width="198"]]
1126
1127
1128 Temperature sensor with 1 meters cable long
1129
1130 **Built-in Temperature Sensor:**
1131
1132 * Resolution: 0.01 °C
1133 * Accuracy Tolerance : Typ ±0.3 °C
1134 * Long Term Drift: < 0.02 °C/yr
1135 * Operating Range: -40 ~~ 80 °C
1136
1137 **Built-in Humidity Sensor:**
1138
1139 * Resolution: 0.04 % RH
1140 * Accuracy Tolerance : Typ ±3 % RH
1141 * Long Term Drift: < 0.02 °C/yr
1142 * Operating Range: 0 ~~ 96 % RH
1143
1144 **External Temperature Sensor :**
1145
1146 * Resolution: 0.01 °C
1147 * Accuracy Tolerance : Typical ±0.3 °C
1148 * Long Term Drift: < 0.02 °C/yr
1149 * Operating Range: -40 ~~ 125 °C
1150
1151 **External 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
1159 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1160
1161
1162 (((
1163 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1164 )))
1165
1166 * (((
1167 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1168 )))
1169
1170 * (((
1171 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1172 )))
1173
1174 (((
1175 There are two kinds of commands to configure LHT65N, they are:
1176 )))
1177
1178 * (((
1179 (% style="color:#4f81bd" %)**General Commands**.
1180 )))
1181
1182 (((
1183 These commands are to configure:
1184 )))
1185
1186 1. (((
1187 General system settings like: uplink interval.
1188 )))
1189 1. (((
1190 LoRaWAN protocol & radio-related commands.
1191 )))
1192
1193 (((
1194 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]]
1195 )))
1196
1197 * (((
1198 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1199 )))
1200
1201 (((
1202 These commands are only valid for LHT65N, as below:
1203 )))
1204
1205
1206 == 4.1 Set Transmit Interval Time ==
1207
1208
1209 Feature: Change LoRaWAN End Node Transmit Interval.
1210
1211
1212 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1213
1214 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1215 |(% 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**
1216 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1217 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1218
1219 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1220
1221 Format: Command Code (0x01) followed by 3 bytes time value.
1222
1223 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1224
1225 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1226
1227 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1228
1229
1230 == 4.2 Set External Sensor Mode ==
1231
1232
1233 Feature: Change External Sensor Mode.
1234
1235
1236 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1237
1238
1239 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1240 |(% 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**
1241 |(% style="width:155px" %)AT+EXT=?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1242 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1243 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1244
1245 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1246
1247 Total bytes: 2 ~~ 5 bytes
1248
1249 **Example:**
1250
1251 * 0xA201: Set external sensor type to E1
1252
1253 * 0xA209: Same as AT+EXT=9
1254
1255 * 0xA20702003c: Same as AT+SETCNT=60
1256
1257
1258 == 4.3 Enable/Disable uplink Temperature probe ID ==
1259
1260
1261 (((
1262 Feature: If PID is enabled, device will send the temperature probe ID on:
1263 )))
1264
1265 * (((
1266 First Packet after OTAA Join
1267 )))
1268 * (((
1269 Every 24 hours since the first packet.
1270 )))
1271
1272 (((
1273 PID is default set to disable (0)
1274
1275
1276 )))
1277
1278 (% style="color:#4f81bd" %)**AT Command:**
1279
1280 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1281 |(% 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**
1282 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1283
1284 (% style="color:#4f81bd" %)**Downlink Command:**
1285
1286 * **0xA800**  **~-~->** AT+PID=0
1287 * **0xA801**     **~-~->** AT+PID=1
1288
1289
1290 == 4.4 Set Password ==
1291
1292
1293 Feature: Set device password, max 9 digits
1294
1295 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1296
1297 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1298 |(% 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**
1299 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1300 123456
1301
1302 OK
1303 )))
1304 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1305
1306 (% style="color:#4f81bd" %)**Downlink Command:**
1307
1308 No downlink command for this feature.
1309
1310
1311 == 4.5 Quit AT Command ==
1312
1313
1314 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1315
1316 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1317
1318 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1319 |(% 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**
1320 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1321
1322 (% style="color:#4f81bd" %)**Downlink Command:**
1323
1324 No downlink command for this feature.
1325
1326
1327 == 4.6 Set to sleep mode ==
1328
1329
1330 Feature: Set device to sleep mode
1331
1332 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1333 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1334
1335 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1336
1337 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
1338 |(% 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**
1339 |(% style="width:155px" %)AT+SLEEP|(% style="width:139px" %)Set to sleep mode|(% style="width:213px" %)(((
1340 Clear all stored sensor data…
1341
1342 OK
1343 )))
1344
1345 (% style="color:#4f81bd" %)**Downlink Command:**
1346
1347 * There is no downlink command to set to Sleep mode.
1348
1349
1350 == 4.7 Set system time ==
1351
1352
1353 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1354
1355 (% style="color:#4f81bd" %)**AT Command:**
1356
1357 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1358 |(% style="background-color:#d9e2f3; color:#0070c0; width:188px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:318px" %)**Function**
1359 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1360 OK
1361
1362 Set System time to 2021-01-20 00:59:12
1363 )))
1364
1365 (% style="color:#4f81bd" %)**Downlink Command:**
1366
1367 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1368
1369
1370 == 4.8 Set Time Sync Mode ==
1371
1372
1373 (((
1374 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1375 )))
1376
1377 (((
1378 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.
1379 )))
1380
1381 (% style="color:#4f81bd" %)**AT Command:**
1382
1383 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1384 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1385 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1386
1387 (% style="color:#4f81bd" %)**Downlink Command:**
1388
1389 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1390 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1391
1392
1393 == 4.9 Set Time Sync Interval ==
1394
1395
1396 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1397
1398 (% style="color:#4f81bd" %)**AT Command:**
1399
1400 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1401 |(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:314px" %)**Function**
1402 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1403
1404 (% style="color:#4f81bd" %)**Downlink Command:**
1405
1406 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1407
1408
1409 == 4.10 Print data entries base on page. ==
1410
1411
1412 Feature: Print the sector data from start page to stop page (max is 416 pages).
1413
1414 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1415
1416 [[image:image-20230426164330-2.png]]
1417
1418
1419 (% style="color:#4f81bd" %)**Downlink Command:**
1420
1421 No downlink commands for feature
1422
1423
1424 == 4.11 Print last few data entries. ==
1425
1426
1427 Feature: Print the last few data entries
1428
1429 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1430
1431 [[image:image-20230426164932-3.png]]
1432
1433
1434 (% style="color:#4f81bd" %)**Downlink Command:**
1435
1436 No downlink commands for feature
1437
1438
1439 == 4.12 Clear Flash Record ==
1440
1441
1442 Feature: Clear flash storage for data log feature.
1443
1444
1445 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1446
1447
1448 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1449 |(% 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**
1450 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1451 Clear all stored sensor data…
1452
1453 OK
1454 )))
1455
1456 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1457
1458 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1459
1460
1461 == 4.13 Auto Send None-ACK messages ==
1462
1463
1464 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.
1465
1466 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1467
1468 The default factory setting is 0
1469
1470 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1471 |=(% 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**
1472 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1473
1474 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1475
1476 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1477
1478
1479 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm(Since firmware 1.3.0) ==
1480
1481
1482 Feature: Set internal and external temperature sensor alarms.
1483
1484 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1485 |=(% 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**
1486 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1487
1488 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1489
1490 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1491
1492 0): Cancel
1493
1494 1): Threshold alarm
1495
1496 2): Fluctuation alarm
1497
1498
1499 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1500
1501 (% 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.**
1502
1503
1504 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1505
1506 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1507
1508 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1509
1510
1511 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.
1512
1513 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1514
1515 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1516
1517
1518 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1519
1520 0xA5 00 ~-~- AT+WMOD=0.
1521
1522 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 )
1523
1524 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))
1525
1526 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1527
1528 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.
1529
1530
1531 = 5. Battery & How to replace =
1532
1533 == 5.1 Battery Type ==
1534
1535
1536 (((
1537 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.
1538 )))
1539
1540 (((
1541 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1542
1543
1544 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1545 )))
1546
1547 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1548
1549
1550 == 5.2 Replace Battery ==
1551
1552
1553 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.
1554
1555 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1556
1557
1558 == 5.3 Battery Life Analyze ==
1559
1560
1561 (((
1562 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:
1563 [[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]]
1564 )))
1565
1566
1567 (((
1568 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]]
1569 )))
1570
1571
1572 = 6. FAQ =
1573
1574 == 6.1 How to use AT Command? ==
1575
1576
1577 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.
1578
1579 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1580
1581
1582 **Connection:**
1583
1584 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1585 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1586 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1587
1588 (((
1589 (% _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)**
1590
1591 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.
1592 )))
1593
1594
1595 Input password and ATZ to activate LHT65N,As shown below:
1596
1597 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1598
1599
1600 AT Command List is as below:
1601
1602 AT+<CMD>? :  Help on <CMD>
1603
1604 AT+<CMD> :  Run <CMD>
1605
1606 AT+<CMD>=<value> :  Set the value
1607
1608 AT+<CMD>=? :  Get the value
1609
1610 AT+DEBUG:  Set more info output
1611
1612 ATZ:  Trig a reset of the MCU
1613
1614 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1615
1616 AT+DEUI:  Get or Set the Device EUI
1617
1618 AT+DADDR:  Get or Set the Device Address
1619
1620 AT+APPKEY:  Get or Set the Application Key
1621
1622 AT+NWKSKEY:  Get or Set the Network Session Key
1623
1624 AT+APPSKEY:  Get or Set the Application Session Key
1625
1626 AT+APPEUI:  Get or Set the Application EUI
1627
1628 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1629
1630 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1631
1632 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1633
1634 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1635
1636 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1637
1638 AT+RX2FQ:  Get or Set the Rx2 window frequency
1639
1640 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1641
1642 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1643
1644 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1645
1646 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1647
1648 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1649
1650 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1651
1652 AT+NWKID:  Get or Set the Network ID
1653
1654 AT+FCU:  Get or Set the Frame Counter Uplink
1655
1656 AT+FCD:  Get or Set the Frame Counter Downlink
1657
1658 AT+CLASS:  Get or Set the Device Class
1659
1660 AT+JOIN:  Join network
1661
1662 AT+NJS:  Get the join status
1663
1664 AT+SENDB:  Send hexadecimal data along with the application port
1665
1666 AT+SEND:  Send text data along with the application port
1667
1668 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1669
1670 AT+RECV:  Print last received data in raw format
1671
1672 AT+VER:  Get current image version and Frequency Band
1673
1674 AT+CFM:  Get or Set the confirmation mode (0-1)
1675
1676 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1677
1678 AT+SNR:  Get the SNR of the last received packet
1679
1680 AT+RSSI:  Get the RSSI of the last received packet
1681
1682 AT+TDC:  Get or set the application data transmission interval in ms
1683
1684 AT+PORT:  Get or set the application port
1685
1686 AT+DISAT:  Disable AT commands
1687
1688 AT+PWORD: Set password, max 9 digits
1689
1690 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1691
1692 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1693
1694 AT+PDTA:  Print the sector data from start page to stop page
1695
1696 AT+PLDTA:  Print the last few sets of data
1697
1698 AT+CLRDTA:  Clear the storage, record position back to 1st
1699
1700 AT+SLEEP:  Set sleep mode
1701
1702 AT+EXT:  Get or Set external sensor model
1703
1704 AT+BAT:  Get the current battery voltage in mV
1705
1706 AT+CFG:  Print all configurations
1707
1708 AT+WMOD:  Get or Set Work Mode
1709
1710 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1711
1712 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1713
1714 AT+SETCNT:  Set the count at present
1715
1716 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1717
1718 AT+RPL:  Get or set response level
1719
1720 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1721
1722 AT+LEAPSEC:  Get or Set Leap Second
1723
1724 AT+SYNCMOD:  Get or Set time synchronization method
1725
1726 AT+SYNCTDC:  Get or set time synchronization interval in day
1727
1728 AT+PID:  Get or set the PID
1729
1730
1731 == 6.2 Where to use AT commands and Downlink commands ==
1732
1733
1734 **AT commands: **
1735
1736 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1737
1738
1739 **Downlink commands:**
1740
1741
1742 (% style="color:blue" %)**TTN:**
1743
1744 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1745
1746
1747
1748 (% style="color:blue" %)**Helium: **
1749
1750 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1751
1752
1753
1754 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1755
1756
1757 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1758
1759
1760 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1761
1762
1763
1764 (% style="color:blue" %)**Aws:**
1765
1766 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1767
1768
1769 == 6.3 How to change the uplink interval? ==
1770
1771
1772 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);"]]
1773
1774
1775 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1776
1777
1778 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1779
1780 [[image:1655802313617-381.png||_mstalt="293917"]]
1781
1782
1783 (((
1784 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.
1785 )))
1786
1787
1788 Input password and ATZ to activate LHT65N, As shown below:
1789
1790 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1791
1792
1793 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1794
1795
1796 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1797
1798
1799 (% 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.
1800
1801 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1802
1803
1804
1805 (% _mstmutation="1" style="color:blue" %)**Step2**(%%): wiring method.(% style="display:none" %)
1806
1807 First connect the four lines;(% style="display:none" %)
1808
1809 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]],(% style="display:none" %)
1810
1811
1812 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1813
1814 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1815
1816
1817
1818 (% style="color:blue" %)**Step3: **(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1819
1820 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1821
1822
1823 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1824
1825
1826 When this interface appears, it indicates that the download has been completed.
1827
1828 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1829
1830
1831 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1832
1833
1834 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1835
1836
1837 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1838
1839
1840 **UART Port of LHT65N:**
1841
1842 * (% class="mark" %)**PB0: RXD**
1843 * (% class="mark" %)**PB1: TXD**
1844 * (% class="mark" %)**GND**
1845
1846 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1847
1848
1849 (((
1850 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.
1851 )))
1852
1853
1854 Input password and ATZ to activate LHT65N,As shown below:
1855
1856 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1857
1858
1859 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1860
1861
1862 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1863
1864
1865 (% 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.
1866
1867 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1868
1869
1870
1871 (% _mstmutation="1" style="color:blue" %)**Step2**(%%): wiring method.(% style="display:none" %)
1872
1873 First connect the four lines;
1874
1875 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1876
1877 Connect A8 and GND with Dupont wire for a while and then separate, enter reset mode
1878
1879
1880
1881 (% style="color:blue" %)**Step3: **(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1882
1883 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1884
1885
1886 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1887
1888
1889 When this interface appears, it indicates that the download has been completed.
1890
1891 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1892
1893
1894 Finally,Disconnect 3.3v, Connect A8 and GND with Dupont wire for a while and then separate, exit reset mode
1895
1896
1897 == 6.8 Why can't I see the datalog information ==
1898
1899
1900 ~1. The time is not aligned, and the correct query command is not used.
1901
1902 2. Decoder error, did not parse the datalog data, the data was filtered.
1903
1904
1905 = 7. Order Info =
1906
1907
1908 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1909
1910 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1911
1912 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1913 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1914 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1915 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1916 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1917 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1918 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1919 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1920
1921 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1922
1923 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1924
1925
1926 = 8. Packing Info =
1927
1928
1929 **Package Includes**:
1930
1931 * LHT65N Temperature & Humidity Sensor x 1
1932 * Optional external sensor
1933
1934 **Dimension and weight**:
1935
1936 * Device Size:  10 x 10 x 3.5 mm
1937 * Device Weight: 120.5g
1938
1939
1940 = 9. Reference material =
1941
1942
1943 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1944
1945
1946 = 10. FCC Warning =
1947
1948
1949 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1950
1951 (1) This device may not cause harmful interference;
1952
1953 (2) this device must accept any interference received, including interference that may cause undesired operation.