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Version 252.1 by Bei Jinggeng on 2023/06/19 09:48
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
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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" %)(((
212 **Size(bytes)**
213 )))|=(% style="width: 30px;background-color:#D9E2F3" %)(((
214 **2**
215 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
216 **2**
217 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
218 **2**
219 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
220 **1**
221 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
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℃(% style="display:none" %)
302
303
304 === 2.4.4 Built-in Humidity ===
305
306
307 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
308
309 * Humidity:    0x025C/10=60.4%(% style="display:none" %)
310
311
312 === 2.4.5 Ext # ===
313
314
315 Bytes for External Sensor:
316
317 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
318 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # **Value|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)External Sensor Type
319 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
320 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
321
322
323 === 2.4.6 Ext value ===
324
325 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
326
327
328 [[image:image-20220522235639-5.png||_mstalt="432848"]]
329
330
331 * DS18B20 temp=0x0ADD/100=27.81℃
332
333 The last 2 bytes of data are meaningless
334
335
336
337 [[image:image-20220522235639-6.png||_mstalt="433212"]]
338
339
340 * External temperature= (0xF54F-65536)/100=-27.37℃
341
342 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
343
344 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
345
346 The last 2 bytes of data are meaningless
347
348 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
349
350
351
352 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
353
354
355 (((
356 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:
357 )))
358
359
360 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
361 |=(% style="width: 50px;background-color:#D9E2F3" %)(((
362 **Size(bytes)**
363 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
364 **2**
365 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
366 **2**
367 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
368 **2**
369 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
370 **1**
371 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
372 **4**
373 )))
374 |(% style="width:110px" %)(((
375 **Value**
376 )))|(% style="width:71px" %)(((
377 External temperature
378 )))|(% style="width:99px" %)(((
379 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
380 )))|(% style="width:132px" %)(((
381 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
382 )))|(% style="width:54px" %)(((
383 Status & Ext
384 )))|(% style="width:64px" %)(((
385 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
386 )))
387
388 * **Battery status & Built-in Humidity**
389
390 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
391 |=(% 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]
392 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
393 BAT Status
394 00(b): Ultra Low ( BAT <= 2.50v)
395 01(b): Low  (2.50v <=BAT <= 2.55v)
396 10(b): OK   (2.55v <= BAT <=2.65v)
397 11(b): Good   (BAT >= 2.65v)
398 )))|(% style="width:132px" %)(((
399 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
400 )))
401
402 * **Status & Ext Byte**
403
404 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
405 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)**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]**
406 |=(% 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)
407
408 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
409 * (% 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.
410 * (% 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)
411
412
413 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
414
415
416 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
417
418 be used to power the external ADC sensor; user can control the power on time for this
419
420 (% style="color:blue" %)**sensor by setting:**
421
422 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
423
424 **For example:**
425
426 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
427
428
429 Or use **downlink command A2** to set the same.
430
431 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
432
433 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.
434
435 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
436
437
438 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
439
440 [[image:image-20220628150714-4.png||_mstalt="431054"]]
441
442
443 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.
444
445
446 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
447
448 [[image:image-20220628151005-5.png||_mstalt="429546"]]
449
450
451 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
452
453 [[image:image-20220628151056-6.png||_mstalt="431873"]]
454
455
456 3) Within range
457
458 [[image:image-20220628151143-7.png||_mstalt="431210"]]
459
460
461
462 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
463
464
465 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
466
467
468 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
469
470 [[image:image-20220906102307-7.png||_mstalt="430443"]]
471
472
473 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
474
475 The external cable NE2 can be use for MOD4 and MOD8
476
477
478
479 ==== 2.4.6.5 Ext~=11 SHT31 Sensor （Since Firmware v1.4.1） ====
480
481
482 [[image:65N-E31F.jpg||height="454" width="459"]]
483
484
485 (% style="color:blue" %)**Ext=11,Temperature & Humidity Sensor(SHT31)：**
486
487 [[image:SHT31.png]]
488
489
490
491 ==== 2.4.6.6 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
492
493
494 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
495
496
497 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
498
499 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
500
501 In Open State, the power consumption is the same as if there is no probe
502
503 In Close state, the power consumption will be 3uA higher than normal.
504
505 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
506
507
508 Ext=4,Interrupt Sensor：
509
510 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
511 |(% style="width:101px" %)(((
512 **AT+EXT=4,1**
513 )))|(% style="width:395px" %)(((
514 **Sent uplink packet in both rising and falling interrupt**
515 )))
516 |(% style="width:101px" %)(((
517 **AT+EXT=4,2**
518 )))|(% style="width:395px" %)(((
519 **Sent uplink packet only in falling interrupt**
520 )))
521 |(% style="width:101px" %)(((
522 **AT+EXT=4,3**
523 )))|(% style="width:395px" %)(((
524 **Sent uplink packet only in rising interrupt**
525 )))
526
527 Trigger by falling edge:
528
529 [[image:image-20220906101145-2.png||_mstalt="428324"]]
530
531
532 Trigger by raising edge：
533
534 [[image:image-20220906101145-3.png||_mstalt="428688"]]
535
536
537
538 ==== 2.4.6.7 Ext~=8 Counting Mode（Since Firmware v1.3） ====
539
540
541 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
542
543
544 (% 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.
545
546 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
547
548
549 (% 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
550
551 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
552
553
554 Ext=8, Counting Sensor ( 4 bytes)：
555
556 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
557 |(% style="width:131px" %)(((
558 **AT+EXT=8,0**
559 )))|(% style="width:195px" %)(((
560 **Count at falling interrupt**
561 )))
562 |(% style="width:131px" %)(((
563 **AT+EXT=8,1**
564 )))|(% style="width:195px" %)(((
565 **Count at rising interrupt**
566 )))
567 |(% style="width:131px" %)(((
568 **AT+SETCNT=60**
569 )))|(% style="width:195px" %)(((
570 **Sent current count to 60**
571 )))
572
573 [[image:image-20220906101320-6.png||_mstalt="428064"]]
574
575
576 (% style="color:blue" %)**A2 downlink Command：**
577
578 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
579
580 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
581
582 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
583
584 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
585
586 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)
587
588
589 ==== 2.4.6.8 Ext~=10, E2 sensor (TMP117)with Unix Timestamp(Since firmware V1.3.2) ====
590
591
592 (((
593 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:
594 )))
595
596
597 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
598 |=(% style="width: 50px;background-color:#D9E2F3" %)(((
599 **Size(bytes)**
600 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
601 **2**
602 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
603 **2**
604 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
605 **2**
606 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
607 **1**
608 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
609 **4**
610 )))
611 |(% style="width:110px" %)(((
612 **Value**
613 )))|(% style="width:71px" %)(((
614 External temperature
615 )))|(% style="width:99px" %)(((
616 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
617 )))|(% style="width:132px" %)(((
618 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
619 )))|(% style="width:54px" %)(((
620 Status & Ext
621 )))|(% style="width:64px" %)(((
622 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
623 )))
624
625 * **Battery status & Built-in Humidity**
626
627 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
628 |=(% 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]
629 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
630 BAT Status
631 00(b): Ultra Low ( BAT <= 2.50v)
632 01(b): Low  (2.50v <=BAT <= 2.55v)
633 10(b): OK   (2.55v <= BAT <=2.65v)
634 11(b): Good   (BAT >= 2.65v)
635 )))|(% style="width:132px" %)(((
636 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
637 )))
638
639 * **Status & Ext Byte**
640
641 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
642 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)**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]**
643 |=(% 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)
644
645 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
646 * (% 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.
647 * (% 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)
648
649
650 == 2.5 Show data on Datacake ==
651
652
653 (((
654 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:
655 )))
656
657
658 (((
659 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
660 )))
661
662 (((
663 (% 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.
664 )))
665
666
667 (((
668 Add Datacake:
669 )))
670
671
672 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
673
674
675
676 Select default key as Access Key:
677
678
679 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
680
681
682 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
683
684
685 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
686
687
688 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
689
690
691 == 2.6 Datalog Feature ==
692
693
694 (((
695 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.
696 )))
697
698
699 === 2.6.1 Ways to get datalog via LoRaWAN ===
700
701
702 There are two methods:
703
704 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
705
706
707 (% 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.
708
709
710 (% style="color:red" %)**Note for method 2:**
711
712 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
713 * 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.
714
715 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
716
717
718 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
719
720
721 === 2.6.2 Unix TimeStamp ===
722
723
724 LHT65N uses Unix TimeStamp format based on
725
726
727 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
728
729
730
731 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
732
733 Below is the converter example
734
735 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
736
737
738 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
739
740
741 === 2.6.3 Set Device Time ===
742
743
744 (((
745 (% style="color:blue" %)**There are two ways to set device's time:**
746 )))
747
748 (((
749 **1.  Through LoRaWAN MAC Command (Default settings)**
750 )))
751
752 (((
753 User need to set SYNCMOD=1 to enable sync time via MAC command.
754 )))
755
756 (((
757 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).
758 )))
759
760 (((
761 (% 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.**
762 )))
763
764
765 (((
766 **2. Manually Set Time**
767 )))
768
769 (((
770 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
771 )))
772
773
774 === 2.6.4 Poll sensor value ===
775
776
777 User can poll sensor value based on timestamps from the server. Below is the downlink command.
778
779 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
780 |(% style="width:58px" %)**1byte**|(% style="width:128px" %)**4bytes**|(% style="width:123px" %)**4bytes**|(% style="width:116px" %)**1byte**
781 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
782
783 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.
784
785 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
786
787 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
788
789 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
790
791
792 === 2.6.5 Datalog Uplink payload ===
793
794
795 The Datalog poll reply uplink will use below payload format.
796
797 **Retrieval data payload:**
798
799 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
800 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
801 **Size(bytes)**
802 )))|=(% style="width: 90px;background-color:#D9E2F3" %)**2**|=(% style="width: 90px;background-color:#D9E2F3" %)**2**|=(% style="width: 70px;background-color:#D9E2F3" %)**2**|=(% style="width: 100px;background-color:#D9E2F3" %)**1**|=(% style="width: 70px;background-color:#D9E2F3" %)**4**
803 |(% 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"]]
804
805 **Poll message flag & Ext:**
806
807 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
808
809 (% 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)
810
811 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
812
813 * Poll Message Flag is set to 1.
814
815 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
816
817 For example, in US915 band, the max payload for different DR is:
818
819 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
820
821 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
822
823 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
824
825 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
826
827 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
828
829
830 **Example:**
831
832 If LHT65N has below data inside Flash:
833
834 [[image:image-20230426171833-4.png]]
835
836
837 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
838
839 Where : Start time: 60065F97 = time 21/1/19 04:27:03
840
841 Stop time: 60066DA7= time 21/1/19 05:27:03
842
843
844 **LHT65N will uplink this payload.**
845
846 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
847
848
849 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
850
851 Where the first 11 bytes is for the first entry:
852
853 7FFF089801464160065F97
854
855 Ext sensor data=0x7FFF/100=327.67
856
857 Temp=0x088E/100=22.00
858
859 Hum=0x014B/10=32.6
860
861 poll message flag & Ext=0x41,means reply data,Ext=1
862
863 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
864
865
866 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
867
868
869 (((
870 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.
871 )))
872
873 (((
874 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
875
876
877 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
878
879
880 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
881
882 (((
883 (% class="box infomessage" %)
884 (((
885 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
886
887 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
888
889 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
890
891 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
892
893 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
894
895 **AT+LEDALARM=1** :       Enable LED visual Alarm.
896 )))
897 )))
898
899 (% style="color:#4f81bd" %)**Downlink Command:**
900
901 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
902
903 AT+CITEMP=1 : A60001
904
905 AT+ARTEMP=1,60  :  A70001003C
906
907 AT+ARTEMP=-16,60 :  A7FFF0003C
908
909 AT+LEDALARM=1  :  3601
910
911
912 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
913
914 Total bytes: 8 bytes
915
916 **Example: **AA0100010001003C
917
918 WMOD=01
919
920 CITEMP=0001
921
922 TEMPlow=0001
923
924 TEMPhigh=003C
925
926
927 **DS18B20 and TMP117 Threshold Alarm**
928
929 **~ AT+WMOD=1,60,-10,20**
930
931 (% style="color:#4f81bd" %)**Downlink Command:**
932
933 **Example: **A5013CFC180014
934
935 MOD=01
936
937 CITEMP=3C(S)
938
939 TEMPlow=FC18
940
941 TEMPhigh=0014
942
943
944 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
945
946 **AT+WMOD=2,60,5** 
947
948 (% style="color:#4f81bd" %)**Downlink Command:**
949
950 **Example: **A5023C05
951
952 MOD=02
953
954 CITEMP=3C(S)
955
956 temperature fluctuation=05
957
958
959 **Sampling multiple times and uplink together**
960
961 **AT+WMOD=3,1,60,20,-16,32,1**   
962
963 Explain:
964
965 * (% style="color:#037691" %)**parameter1: **(%%)Set Working Mode to **Mode 3**
966 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
967 * (% style="color:#037691" %)**parameter3: **(%%)Sampling Interval is **60**s.
968 * (% 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)
969 * (% style="color:#037691" %)**parameter5 & parameter6: **(%%)Temperature alarm range is **-16** to **32**°C,
970 * (% 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.
971
972 (% style="color:#4f81bd" %)**Downlink Command:**
973
974 **Example: **A50301003C14FFF0002001
975
976 MOD=03
977
978 TEMP=DS18B20
979
980 CITEMP=003C(S)
981
982 Total number of acquisitions=14
983
984 TEMPlow=FFF0
985
986 TEMPhigh=0020
987
988 ARTEMP=01
989
990
991 **Uplink payload( Fport=3)**
992
993 **Example: CBEA**01**0992**//0A41//**09C4**
994
995 BatV=CBEA
996
997 TEMP=DS18B20
998
999 Temp1=0992  ~/~/ 24.50℃
1000
1001 Temp2=0A41  ~/~/ 26.25℃
1002
1003 Temp3=09C4  ~/~/ 25.00℃
1004
1005 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
1006
1007 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
1008 )))
1009
1010
1011 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
1012
1013
1014 (% class="box infomessage" %)
1015 (((
1016 (((
1017 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
1018 )))
1019
1020 (((
1021 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
1022 )))
1023
1024 (((
1025 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
1026 )))
1027
1028 (((
1029 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
1030 )))
1031
1032 (((
1033 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
1034 )))
1035 )))
1036
1037 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
1038
1039 Total bytes: 8 bytes
1040
1041 **Example:**AA0100010001003C
1042
1043 WMOD=01
1044
1045 CITEMP=0001
1046
1047 TEMPlow=0001
1048
1049 TEMPhigh=003C
1050
1051
1052 == 2.8 LED Indicator ==
1053
1054
1055 The LHT65 has a triple color LED which for easy showing different stage .
1056
1057 While user press ACT button, the LED will work as per LED status with ACT button.
1058
1059 In a normal working state:
1060
1061 * For each uplink, the BLUE LED or RED LED will blink once.
1062 BLUE LED when external sensor is connected.
1063 * RED LED when external sensor is not connected
1064 * For each success downlink, the PURPLE LED will blink once
1065
1066
1067 == 2.9 installation ==
1068
1069
1070 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
1071
1072
1073 = 3. Sensors and Accessories =
1074
1075 == 3.1 E2 Extension Cable ==
1076
1077
1078 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
1079
1080
1081 **1m long breakout cable for LHT65N. Features:**
1082
1083 * (((
1084 Use for AT Command， works for both LHT52/LHT65N
1085 )))
1086 * (((
1087 Update firmware for LHT65N, works for both LHT52/LHT65N
1088 )))
1089 * (((
1090 Supports ADC mode to monitor external ADC
1091 )))
1092 * (((
1093 Supports Interrupt mode
1094 )))
1095 * (((
1096 Exposed All pins from the LHT65N Type-C connector.
1097
1098
1099
1100 )))
1101
1102 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1103
1104
1105 == 3.2 E3 Temperature Probe ==
1106
1107
1108 [[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"]]
1109
1110
1111 Temperature sensor with 2 meters cable long
1112
1113 * Resolution: 0.0625 °C
1114 * ±0.5°C accuracy from -10°C to +85°C
1115 * ±2°C accuracy from -55°C to +125°C
1116 * Operating Range: -40 ~~ 125 °C
1117 * Working voltage 2.35v ~~ 5v
1118
1119
1120 == 3.3 E31F Temperature Probe ==
1121
1122
1123 [[image:65N-E31F-1.jpg||height="169" width="170"]] [[image:65N-E31F.jpg||height="196" width="198"]]
1124
1125
1126 Temperature sensor with 1 meters cable long
1127
1128 **Built-in Temperature Sensor:**
1129
1130 * Resolution: 0.01 °C
1131 * Accuracy Tolerance : Typ ±0.3 °C
1132 * Long Term Drift: < 0.02 °C/yr
1133 * Operating Range: -40 ~~ 80 °C
1134
1135 **Built-in Humidity Sensor:**
1136
1137 * Resolution: 0.04 % RH
1138 * Accuracy Tolerance : Typ ±3 % RH
1139 * Long Term Drift: < 0.02 °C/yr
1140 * Operating Range: 0 ~~ 96 % RH
1141
1142 **External Temperature Sensor :**
1143
1144 * Resolution: 0.01 °C
1145 * Accuracy Tolerance : Typical ±0.3 °C
1146 * Long Term Drift: < 0.02 °C/yr
1147 * Operating Range: -40 ~~ 125 °C
1148
1149 **External Humidity Sensor :**
1150
1151 * Resolution: 0.04 % RH
1152 * Accuracy Tolerance : Typ ±3 % RH
1153 * Long Term Drift: < 0.02 °C/yr
1154 * Operating Range: 0 ~~ 96 % RH
1155
1156
1157 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1158
1159
1160 (((
1161 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1162 )))
1163
1164 * (((
1165 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1166 )))
1167
1168 * (((
1169 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1170 )))
1171
1172 (((
1173 There are two kinds of commands to configure LHT65N, they are:
1174 )))
1175
1176 * (((
1177 (% style="color:#4f81bd" %)**General Commands**.
1178 )))
1179
1180 (((
1181 These commands are to configure:
1182 )))
1183
1184 1. (((
1185 General system settings like: uplink interval.
1186 )))
1187 1. (((
1188 LoRaWAN protocol & radio-related commands.
1189 )))
1190
1191 (((
1192 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]]
1193 )))
1194
1195 * (((
1196 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1197 )))
1198
1199 (((
1200 These commands are only valid for LHT65N, as below:
1201 )))
1202
1203
1204 == 4.1 Set Transmit Interval Time ==
1205
1206
1207 Feature: Change LoRaWAN End Node Transmit Interval.
1208
1209
1210 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1211
1212 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1213 |(% 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**
1214 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1215 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1216
1217 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1218
1219 Format: Command Code (0x01) followed by 3 bytes time value.
1220
1221 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1222
1223 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1224
1225 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1226
1227
1228 == 4.2 Set External Sensor Mode ==
1229
1230
1231 Feature: Change External Sensor Mode.
1232
1233
1234 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1235
1236
1237 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1238 |(% 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**
1239 |(% style="width:155px" %)AT+EXT=?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1240 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1241 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1242
1243 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1244
1245 Total bytes: 2 ~~ 5 bytes
1246
1247 **Example:**
1248
1249 * 0xA201: Set external sensor type to E1
1250
1251 * 0xA209: Same as AT+EXT=9
1252
1253 * 0xA20702003c: Same as AT+SETCNT=60
1254
1255
1256 == 4.3 Enable/Disable uplink Temperature probe ID ==
1257
1258
1259 (((
1260 Feature: If PID is enabled, device will send the temperature probe ID on:
1261 )))
1262
1263 * (((
1264 First Packet after OTAA Join
1265 )))
1266 * (((
1267 Every 24 hours since the first packet.
1268 )))
1269
1270 (((
1271 PID is default set to disable (0)
1272
1273
1274 )))
1275
1276 (% style="color:#4f81bd" %)**AT Command:**
1277
1278 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1279 |(% 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**
1280 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1281
1282 (% style="color:#4f81bd" %)**Downlink Command:**
1283
1284 * **0xA800**  **~-~->** AT+PID=0
1285 * **0xA801**     **~-~->** AT+PID=1
1286
1287
1288 == 4.4 Set Password ==
1289
1290
1291 Feature: Set device password, max 9 digits
1292
1293 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1294
1295 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1296 |(% 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**
1297 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1298 123456
1299
1300 OK
1301 )))
1302 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1303
1304 (% style="color:#4f81bd" %)**Downlink Command:**
1305
1306 No downlink command for this feature.
1307
1308
1309 == 4.5 Quit AT Command ==
1310
1311
1312 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1313
1314 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1315
1316 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1317 |(% 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**
1318 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1319
1320 (% style="color:#4f81bd" %)**Downlink Command:**
1321
1322 No downlink command for this feature.
1323
1324
1325 == 4.6 Set to sleep mode ==
1326
1327
1328 Feature: Set device to sleep mode
1329
1330 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1331 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1332
1333 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1334
1335 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
1336 |(% 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**
1337 |(% style="width:155px" %)AT+SLEEP|(% style="width:139px" %)Set to sleep mode|(% style="width:213px" %)(((
1338 Clear all stored sensor data…
1339
1340 OK
1341 )))
1342
1343 (% style="color:#4f81bd" %)**Downlink Command:**
1344
1345 * There is no downlink command to set to Sleep mode.
1346
1347
1348 == 4.7 Set system time ==
1349
1350
1351 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1352
1353 (% style="color:#4f81bd" %)**AT Command:**
1354
1355 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1356 |(% style="background-color:#d9e2f3; color:#0070c0; width:188px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:318px" %)**Function**
1357 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1358 OK
1359
1360 Set System time to 2021-01-20 00:59:12
1361 )))
1362
1363 (% style="color:#4f81bd" %)**Downlink Command:**
1364
1365 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1366
1367
1368 == 4.8 Set Time Sync Mode ==
1369
1370
1371 (((
1372 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1373 )))
1374
1375 (((
1376 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.
1377 )))
1378
1379 (% style="color:#4f81bd" %)**AT Command:**
1380
1381 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1382 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1383 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1384
1385 (% style="color:#4f81bd" %)**Downlink Command:**
1386
1387 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1388 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1389
1390
1391 == 4.9 Set Time Sync Interval ==
1392
1393
1394 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1395
1396 (% style="color:#4f81bd" %)**AT Command:**
1397
1398 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1399 |(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:314px" %)**Function**
1400 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1401
1402 (% style="color:#4f81bd" %)**Downlink Command:**
1403
1404 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1405
1406
1407 == 4.10 Print data entries base on page. ==
1408
1409
1410 Feature: Print the sector data from start page to stop page (max is 416 pages).
1411
1412 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1413
1414 [[image:image-20230426164330-2.png]]
1415
1416
1417 (% style="color:#4f81bd" %)**Downlink Command:**
1418
1419 No downlink commands for feature
1420
1421
1422 == 4.11 Print last few data entries. ==
1423
1424
1425 Feature: Print the last few data entries
1426
1427 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1428
1429 [[image:image-20230426164932-3.png]]
1430
1431
1432 (% style="color:#4f81bd" %)**Downlink Command:**
1433
1434 No downlink commands for feature
1435
1436
1437 == 4.12 Clear Flash Record ==
1438
1439
1440 Feature: Clear flash storage for data log feature.
1441
1442
1443 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1444
1445
1446 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1447 |(% 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**
1448 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1449 Clear all stored sensor data…
1450
1451 OK
1452 )))
1453
1454 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1455
1456 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1457
1458
1459 == 4.13 Auto Send None-ACK messages ==
1460
1461
1462 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.
1463
1464 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1465
1466 The default factory setting is 0
1467
1468 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1469 |=(% 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**
1470 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1471
1472 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1473
1474 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1475
1476
1477 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1478
1479
1480 Feature: Set internal and external temperature sensor alarms.
1481
1482 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1483 |=(% 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**
1484 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1485
1486 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1487
1488 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1489
1490 0): Cancel
1491
1492 1): Threshold alarm
1493
1494 2): Fluctuation alarm
1495
1496
1497 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1498
1499 (% 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.**
1500
1501
1502 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1503
1504 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1505
1506 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1507
1508
1509 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.
1510
1511 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1512
1513 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1514
1515
1516 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1517
1518 0xA5 00 ~-~- AT+WMOD=0.
1519
1520 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 )
1521
1522 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))
1523
1524 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1525
1526 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.
1527
1528
1529 = 5. Battery & How to replace =
1530
1531 == 5.1 Battery Type ==
1532
1533
1534 (((
1535 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.
1536 )))
1537
1538 (((
1539 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1540
1541
1542 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1543 )))
1544
1545 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1546
1547
1548 == 5.2 Replace Battery ==
1549
1550
1551 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.
1552
1553 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1554
1555
1556 == 5.3 Battery Life Analyze ==
1557
1558
1559 (((
1560 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:
1561 [[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]]
1562 )))
1563
1564
1565 (((
1566 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]]
1567 )))
1568
1569
1570 = 6. FAQ =
1571
1572 == 6.1 How to use AT Command? ==
1573
1574
1575 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.
1576
1577 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1578
1579
1580 **Connection:**
1581
1582 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1583 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1584 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1585
1586 (((
1587 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.
1588 )))
1589
1590
1591 Input password and ATZ to activate LHT65N,As shown below:
1592
1593 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1594
1595
1596 AT Command List is as below:
1597
1598 AT+<CMD>? :  Help on <CMD>
1599
1600 AT+<CMD> :  Run <CMD>
1601
1602 AT+<CMD>=<value> :  Set the value
1603
1604 AT+<CMD>=? :  Get the value
1605
1606 AT+DEBUG:  Set more info output
1607
1608 ATZ:  Trig a reset of the MCU
1609
1610 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1611
1612 AT+DEUI:  Get or Set the Device EUI
1613
1614 AT+DADDR:  Get or Set the Device Address
1615
1616 AT+APPKEY:  Get or Set the Application Key
1617
1618 AT+NWKSKEY:  Get or Set the Network Session Key
1619
1620 AT+APPSKEY:  Get or Set the Application Session Key
1621
1622 AT+APPEUI:  Get or Set the Application EUI
1623
1624 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1625
1626 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1627
1628 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1629
1630 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1631
1632 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1633
1634 AT+RX2FQ:  Get or Set the Rx2 window frequency
1635
1636 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1637
1638 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1639
1640 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1641
1642 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1643
1644 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1645
1646 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1647
1648 AT+NWKID:  Get or Set the Network ID
1649
1650 AT+FCU:  Get or Set the Frame Counter Uplink
1651
1652 AT+FCD:  Get or Set the Frame Counter Downlink
1653
1654 AT+CLASS:  Get or Set the Device Class
1655
1656 AT+JOIN:  Join network
1657
1658 AT+NJS:  Get the join status
1659
1660 AT+SENDB:  Send hexadecimal data along with the application port
1661
1662 AT+SEND:  Send text data along with the application port
1663
1664 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1665
1666 AT+RECV:  Print last received data in raw format
1667
1668 AT+VER:  Get current image version and Frequency Band
1669
1670 AT+CFM:  Get or Set the confirmation mode (0-1)
1671
1672 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1673
1674 AT+SNR:  Get the SNR of the last received packet
1675
1676 AT+RSSI:  Get the RSSI of the last received packet
1677
1678 AT+TDC:  Get or set the application data transmission interval in ms
1679
1680 AT+PORT:  Get or set the application port
1681
1682 AT+DISAT:  Disable AT commands
1683
1684 AT+PWORD: Set password, max 9 digits
1685
1686 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1687
1688 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1689
1690 AT+PDTA:  Print the sector data from start page to stop page
1691
1692 AT+PLDTA:  Print the last few sets of data
1693
1694 AT+CLRDTA:  Clear the storage, record position back to 1st
1695
1696 AT+SLEEP:  Set sleep mode
1697
1698 AT+EXT:  Get or Set external sensor model
1699
1700 AT+BAT:  Get the current battery voltage in mV
1701
1702 AT+CFG:  Print all configurations
1703
1704 AT+WMOD:  Get or Set Work Mode
1705
1706 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1707
1708 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1709
1710 AT+SETCNT:  Set the count at present
1711
1712 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1713
1714 AT+RPL:  Get or set response level
1715
1716 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1717
1718 AT+LEAPSEC:  Get or Set Leap Second
1719
1720 AT+SYNCMOD:  Get or Set time synchronization method
1721
1722 AT+SYNCTDC:  Get or set time synchronization interval in day
1723
1724 AT+PID:  Get or set the PID
1725
1726
1727 == 6.2 Where to use AT commands and Downlink commands ==
1728
1729
1730 **AT commands：**
1731
1732 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1733
1734
1735 **Downlink commands:**
1736
1737
1738 (% style="color:blue" %)**TTN:**
1739
1740 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1741
1742
1743
1744 (% style="color:blue" %)**Helium：**
1745
1746 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1747
1748
1749
1750 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1751
1752
1753 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1754
1755
1756 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1757
1758
1759
1760 (% style="color:blue" %)**Aws:**
1761
1762 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1763
1764
1765 == 6.3 How to change the uplink interval？ ==
1766
1767
1768 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);"]]
1769
1770
1771 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1772
1773
1774 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1775
1776 [[image:1655802313617-381.png||_mstalt="293917"]]
1777
1778
1779 (((
1780 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.
1781 )))
1782
1783
1784 Input password and ATZ to activate LHT65N,As shown below:
1785
1786 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1787
1788
1789 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1790
1791
1792 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1793
1794
1795 (% 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.
1796
1797 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1798
1799
1800
1801 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1802
1803 First connect the four lines；(% style="display:none" %)
1804
1805 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1806
1807
1808 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1809
1810 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1811
1812
1813
1814 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1815
1816 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1817
1818
1819 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1820
1821
1822 When this interface appears, it indicates that the download has been completed.
1823
1824 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1825
1826
1827 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1828
1829
1830 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1831
1832
1833 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1834
1835
1836 **UART Port of LHT65N:**
1837
1838 * (% class="mark" %)**PB0: RXD**
1839 * (% class="mark" %)**PB1: TXD**
1840 * (% class="mark" %)**GND**
1841
1842 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1843
1844
1845 (((
1846 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.
1847 )))
1848
1849
1850 Input password and ATZ to activate LHT65N,As shown below:
1851
1852 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1853
1854
1855 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1856
1857
1858 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1859
1860
1861 (% 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.
1862
1863 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1864
1865
1866
1867 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1868
1869 First connect the four lines；
1870
1871 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1872
1873 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1874
1875
1876
1877 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1878
1879 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1880
1881
1882 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1883
1884
1885 When this interface appears, it indicates that the download has been completed.
1886
1887 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1888
1889
1890 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1891
1892
1893 == 6.8 Why can't I see the datalog information ==
1894
1895
1896 ~1. The time is not aligned, and the correct query command is not used.
1897
1898 2. Decoder error, did not parse the datalog data, the data was filtered.
1899
1900
1901 = 7. Order Info =
1902
1903
1904 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1905
1906 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1907
1908 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1909 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1910 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1911 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1912 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1913 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1914 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1915 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1916
1917 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1918
1919 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1920
1921
1922 = 8. Packing Info =
1923
1924
1925 **Package Includes**:
1926
1927 * LHT65N Temperature & Humidity Sensor x 1
1928 * Optional external sensor
1929
1930 **Dimension and weight**:
1931
1932 * Device Size:  10 x 10 x 3.5 mm
1933 * Device Weight: 120.5g
1934
1935
1936 = 9. Reference material =
1937
1938
1939 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1940
1941
1942 = 10. FCC Warning =
1943
1944
1945 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1946
1947 (1) This device may not cause harmful interference；
1948
1949 (2) this device must accept any interference received, including interference that may cause undesired operation.