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Version 238.6 by Xiaoling on 2023/04/26 18:05
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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/}}
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14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
23 )))
24
25 (((
26 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46 == 1.2 Features ==
47
48
49 * LoRaWAN v1.0.3 Class A protocol
50 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
51 * AT Commands to change parameters
52 * Remote configure parameters via LoRaWAN Downlink
53 * Firmware upgradeable via program port
54 * Built-in 2400mAh battery for up to 10 years of use.
55 * Built-in Temperature & Humidity sensor
56 * Optional External Sensors
57 * Tri-color LED to indicate working status
58 * Datalog feature (Max 3328 records)
59
60
61
62 == 1.3 Specification ==
63
64
65 (% style="color:#037691" %)**Built-in Temperature Sensor:**
66
67 * Resolution: 0.01 °C
68 * Accuracy Tolerance : Typ ±0.3 °C
69 * Long Term Drift: < 0.02 °C/yr
70 * Operating Range: -40 ~~ 85 °C
71
72 (% style="color:#037691" %)**Built-in Humidity Sensor:**
73
74 * Resolution: 0.04 %RH
75 * Accuracy Tolerance : Typ ±3 %RH
76 * Long Term Drift: < 0.02 °C/yr
77 * Operating Range: 0 ~~ 96 %RH
78
79 (% style="color:#037691" %)**External Temperature Sensor:**
80
81 * Resolution: 0.0625 °C
82 * ±0.5°C accuracy from -10°C to +85°C
83 * ±2°C accuracy from -55°C to +125°C
84 * Operating Range: -55 °C ~~ 125 °C
85
86
87
88 = 2. Connect LHT65N to IoT Server =
89
90 == 2.1 How does LHT65N work? ==
91
92
93 (((
94 LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
95 )))
96
97 (((
98 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
99 )))
100
101
102 == 2.2 How to Activate LHT65N? ==
103
104
105 (((
106 The LHT65N has two working modes:
107 )))
108
109 * (((
110 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
111 )))
112 * (((
113 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
114 )))
115
116 (((
117 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
118 )))
119
120
121 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
122
123 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
124 |=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)**Action**
125 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT between 1s < time < 3s|(% style="background-color:#f2f2f2; width:117px" %)Test uplink status|(% style="background-color:#f2f2f2; width:225px" %)(((
126 If LHT65N is already Joined to rhe LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has external sensor connected,(% style="color:blue" %)**Blue led** (%%)will blink once. If LHT65N has not external sensor, (% style="color:red" %)**Red led**(%%) will blink once.
127 )))
128 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT for more than 3s|(% style="background-color:#f2f2f2; width:117px" %)Active Device|(% style="background-color:#f2f2f2; width:225px" %)(((
129 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
130 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
131 )))
132 |(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means LHT65N is in Deep Sleep Mode.
133
134
135
136 == 2.3 Example to join LoRaWAN network ==
137
138
139 (% class="wikigeneratedid" %)
140 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
141
142
143 (% class="wikigeneratedid" %)
144 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
145
146
147 (((
148 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
149 )))
150
151
152 === 2.3.1 Step 1: Create Device n TTN ===
153
154
155 (((
156 Create a device in TTN V3 with the OTAA keys from LHT65N.
157 )))
158
159 (((
160 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
161 )))
162
163 [[image:image-20230426083319-1.png]]
164
165 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
166
167 Add APP EUI in the application.
168
169
170 [[image:image-20220522232916-3.png||_mstalt="430495"]]
171
172
173 [[image:image-20220522232932-4.png||_mstalt="430157"]]
174
175
176 [[image:image-20220522232954-5.png||_mstalt="431847"]]
177
178
179
180 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
181
182
183 [[image:image-20220522233026-6.png||_mstalt="429403"]]
184
185
186 Input APP EUI,  APP KEY and DEV EUI:
187
188
189 [[image:image-20220522233118-7.png||_mstalt="430430"]]
190
191
192 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
193
194
195 (((
196 Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
197 )))
198
199 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
200
201
202 == 2.4 Uplink Payload   ( Fport~=2) ==
203
204
205 (((
206 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
207 )))
208
209 (((
210 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
211 )))
212
213 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
214 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
215 **Size(bytes)**
216 )))|=(% style="width: 30px;background-color:#D9E2F3" %)(((
217 **2**
218 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
219 **2**
220 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
221 **2**
222 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
223 **1**
224 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
225 **4**
226 )))
227 |(% style="width:97px" %)(((
228 **Value**
229 )))|(% style="width:39px" %)(((
230 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
231 )))|(% style="width:100px" %)(((
232 (((
233 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
234 )))
235 )))|(% style="width:77px" %)(((
236 (((
237 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
238 )))
239 )))|(% style="width:47px" %)(((
240 [[Ext>>||anchor="H2.4.5Ext23"]] #
241 )))|(% style="width:51px" %)(((
242 [[Ext value>>||anchor="H2.4.6Extvalue"]]
243 )))
244
245 * The First 6 bytes: has fix meanings for every LHT65N.
246
247 * The 7th byte (EXT #): defines the external sensor model.
248
249 * The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won't be these four bytes.)
250
251
252
253 === 2.4.1 Decoder in TTN V3 ===
254
255
256 When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
257
258 Below is the position to put the decoder and LHT65N decoder can be download from here: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
259
260
261 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
262
263
264 === 2.4.2 BAT-Battery Info ===
265
266
267 These two bytes of BAT include the battery state and the actually voltage.
268
269 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
270 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
271 **Bit(bit)**
272 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
273 |(% style="width:66px" %)(((
274 **Value**
275 )))|(% style="width:250px" %)(((
276 BAT Status
277 00(b): Ultra Low ( BAT <= 2.50v)
278 01(b): Low (2.50v <=BAT <= 2.55v)
279 10(b): OK (2.55v <= BAT <=2.65v)
280 11(b): Good (BAT >= 2.65v)
281 )))|(% style="width:152px" %)Actually BAT voltage
282
283 **(b)stands for binary**
284
285
286 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
287
288
289 Check the battery voltage for LHT65N.
290
291 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
292
293 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
294
295
296
297 === 2.4.3 Built-in Temperature ===
298
299
300 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
301
302 * Temperature:  0x0ABB/100=27.47℃
303
304 [[image:image-20220522235639-3.png||_mstalt="432120"]]
305
306 * Temperature:  (0xF5C6-65536)/100=-26.18℃
307
308
309
310 === 2.4.4 Built-in Humidity ===
311
312
313 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
314
315 * Humidity:    0x025C/10=60.4%
316
317
318
319 === 2.4.5 Ext # ===
320
321
322 Bytes for External Sensor:
323
324 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
325 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # Value**|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)**External Sensor Type**
326 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
327 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
328
329
330
331 === 2.4.6 Ext value ===
332
333 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
334
335
336 [[image:image-20220522235639-5.png||_mstalt="432848"]]
337
338
339 * DS18B20 temp=0x0ADD/100=27.81℃
340
341 The last 2 bytes of data are meaningless
342
343
344
345 [[image:image-20220522235639-6.png||_mstalt="433212"]]
346
347
348 * External temperature= (0xF54F-65536)/100=-27.37℃
349
350 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
351
352 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
353
354 The last 2 bytes of data are meaningless
355
356 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
357
358
359
360 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
361
362
363 (((
364 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:
365 )))
366
367
368 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
369 |=(% style="width: 50px;background-color:#D9E2F3" %)(((
370 **Size(bytes)**
371 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
372 **2**
373 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
374 **2**
375 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
376 **2**
377 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
378 **1**
379 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
380 **4**
381 )))
382 |(% style="width:110px" %)(((
383 **Value**
384 )))|(% style="width:71px" %)(((
385 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
386 )))|(% style="width:99px" %)(((
387 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
388 )))|(% style="width:132px" %)(((
389 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
390 )))|(% style="width:54px" %)(((
391 Status & Ext
392 )))|(% style="width:64px" %)(((
393 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
394 )))
395
396 * **Battery status & Built-in Humidity**
397
398 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
399 |=(% 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]
400 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
401 BAT Status
402 00(b): Ultra Low ( BAT <= 2.50v)
403 01(b): Low  (2.50v <=BAT <= 2.55v)
404 10(b): OK   (2.55v <= BAT <=2.65v)
405 11(b): Good   (BAT >= 2.65v)
406 )))|(% style="width:132px" %)(((
407 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
408 )))
409
410 * **Status & Ext Byte**
411
412 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
413 |=(% 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]**
414 |=(% 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)
415
416 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
417 * (% 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.
418 * (% 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)
419
420
421
422 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
423
424
425 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
426
427 be used to power the external ADC sensor; user can control the power on time for this
428
429 (% style="color:blue" %)**sensor by setting:**
430
431 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
432
433 **For example:**
434
435 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
436
437
438 Or use **downlink command A2** to set the same.
439
440 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
441
442 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.
443
444 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
445
446
447 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
448
449 [[image:image-20220628150714-4.png||_mstalt="431054"]]
450
451
452 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.
453
454
455 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
456
457 [[image:image-20220628151005-5.png||_mstalt="429546"]]
458
459
460 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
461
462 [[image:image-20220628151056-6.png||_mstalt="431873"]]
463
464
465 3) Within range
466
467 [[image:image-20220628151143-7.png||_mstalt="431210"]]
468
469
470
471 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
472
473
474 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
475
476
477 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
478
479 [[image:image-20220906102307-7.png||_mstalt="430443"]]
480
481
482 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
483
484 The external cable NE2 can be use for MOD4 and MOD8
485
486
487
488 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
489
490
491 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
492
493
494 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
495
496 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
497
498 In Open State, the power consumption is the same as if there is no probe
499
500 In Close state, the power consumption will be 3uA higher than normal.
501
502 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
503
504
505 Ext=4,Interrupt Sensor：
506
507 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
508 |(% style="width:101px" %)(((
509 **AT+EXT=4,1**
510 )))|(% style="width:395px" %)(((
511 **Sent uplink packet in both rising and falling interrupt**
512 )))
513 |(% style="width:101px" %)(((
514 **AT+EXT=4,2**
515 )))|(% style="width:395px" %)(((
516 **Sent uplink packet only in falling interrupt**
517 )))
518 |(% style="width:101px" %)(((
519 **AT+EXT=4,3**
520 )))|(% style="width:395px" %)(((
521 **Sent uplink packet only in rising interrupt**
522 )))
523
524 Trigger by falling edge:
525
526 [[image:image-20220906101145-2.png||_mstalt="428324"]]
527
528
529 Trigger by raising edge：
530
531 [[image:image-20220906101145-3.png||_mstalt="428688"]]
532
533
534
535 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
536
537
538 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
539
540
541 (% 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.
542
543 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
544
545
546 (% 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
547
548 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
549
550
551 Ext=8, Counting Sensor ( 4 bytes)：
552
553 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
554 |(% style="width:131px" %)(((
555 **AT+EXT=8,0**
556 )))|(% style="width:195px" %)(((
557 **Count at falling interrupt**
558 )))
559 |(% style="width:131px" %)(((
560 **AT+EXT=8,1**
561 )))|(% style="width:195px" %)(((
562 **Count at rising interrupt**
563 )))
564 |(% style="width:131px" %)(((
565 **AT+SETCNT=60**
566 )))|(% style="width:195px" %)(((
567 **Sent current count to 60**
568 )))
569
570 [[image:image-20220906101320-6.png||_mstalt="428064"]]
571
572
573 (% style="color:blue" %)**A2 downlink Command：**
574
575 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
576
577 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
578
579 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
580
581 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
582
583 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)
584
585
586 == 2.5 Show data on Datacake ==
587
588
589 (((
590 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:
591 )))
592
593
594 (((
595 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
596 )))
597
598 (((
599 (% 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.
600 )))
601
602
603 (((
604 Add Datacake:
605 )))
606
607
608 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
609
610
611
612 Select default key as Access Key:
613
614
615 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
616
617
618 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
619
620
621 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
622
623
624 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
625
626
627 == 2.6 Datalog Feature ==
628
629
630 (((
631 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.
632 )))
633
634
635 === 2.6.1 Ways to get datalog via LoRaWAN ===
636
637
638 There are two methods:
639
640 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
641
642
643 (% 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.
644
645
646 (% style="color:red" %)**Note for method 2:**
647
648 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
649 * 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.
650
651 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
652
653
654 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
655
656
657 === 2.6.2 Unix TimeStamp ===
658
659
660 LHT65N uses Unix TimeStamp format based on
661
662
663 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
664
665
666
667 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
668
669 Below is the converter example
670
671 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
672
673
674 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
675
676
677 === 2.6.3 Set Device Time ===
678
679
680 (((
681 (% style="color:blue" %)**There are two ways to set device's time:**
682 )))
683
684 (((
685 **1.  Through LoRaWAN MAC Command (Default settings)**
686 )))
687
688 (((
689 User need to set SYNCMOD=1 to enable sync time via MAC command.
690 )))
691
692 (((
693 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).
694 )))
695
696 (((
697 (% 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.**
698 )))
699
700
701 (((
702 **2. Manually Set Time**
703 )))
704
705 (((
706 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
707 )))
708
709
710 === 2.6.4 Poll sensor value ===
711
712
713 User can poll sensor value based on timestamps from the server. Below is the downlink command.
714
715 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
716 |(% style="width:58px" %)1byte|(% style="width:128px" %)4bytes|(% style="width:123px" %)4bytes|(% style="width:116px" %)1byte
717 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
718
719 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.
720
721 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
722
723 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
724
725 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
726
727
728 === 2.6.5 Datalog Uplink payload ===
729
730
731 The Datalog poll reply uplink will use below payload format.
732
733 **Retrieval data payload:**
734
735 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
736 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
737 **Size(bytes)**
738 )))|=(% 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**
739 |(% 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"]]
740
741 **Poll message flag & Ext:**
742
743 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
744
745 (% 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)
746
747 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
748
749 * Poll Message Flag is set to 1.
750
751 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
752
753 For example, in US915 band, the max payload for different DR is:
754
755 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
756
757 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
758
759 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
760
761 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
762
763 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
764
765
766 **Example:**
767
768 If LHT65N has below data inside Flash:
769
770 [[image:image-20230426171833-4.png]]
771
772
773 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
774
775 Where : Start time: 60065F97 = time 21/1/19 04:27:03
776
777 Stop time: 60066DA7= time 21/1/19 05:27:03
778
779
780 **LHT65N will uplink this payload.**
781
782 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
783
784
785 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
786
787 Where the first 11 bytes is for the first entry:
788
789 7FFF089801464160065F97
790
791 Ext sensor data=0x7FFF/100=327.67
792
793 Temp=0x088E/100=22.00
794
795 Hum=0x014B/10=32.6
796
797 poll message flag & Ext=0x41,means reply data,Ext=1
798
799 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
800
801
802 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
803
804
805 (((
806 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.
807 )))
808
809 (((
810 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
811
812
813 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
814
815
816 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
817
818 (((
819 (% class="box infomessage" %)
820 (((
821 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
822
823 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
824
825 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
826
827 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
828
829 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
830
831 **AT+LEDALARM=1** :       Enable LED visual Alarm.
832 )))
833 )))
834
835 (% style="color:#4f81bd" %)**Downlink Command:**
836
837 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
838
839 AT+CITEMP=1 : A60001
840
841 AT+ARTEMP=1,60  :  A70001003C
842
843 AT+ARTEMP=-16,60 :  A7FFF0003C
844
845 AT+LEDALARM=1  :  3601
846
847
848 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
849
850 Total bytes: 8 bytes
851
852 **Example: **AA0100010001003C
853
854 WMOD=01
855
856 CITEMP=0001
857
858 TEMPlow=0001
859
860 TEMPhigh=003C
861
862
863 **DS18B20 and TMP117 Threshold Alarm**
864
865 **~ AT+WMOD=1,60,-10,20**
866
867 (% style="color:#4f81bd" %)**Downlink Command:**
868
869 **Example: **A5013CFC180014
870
871 MOD=01
872
873 CITEMP=3C(S)
874
875 TEMPlow=FC18
876
877 TEMPhigh=0014
878
879
880 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
881
882 **AT+WMOD=2,60,5** 
883
884 (% style="color:#4f81bd" %)**Downlink Command:**
885
886 **Example: **A5023C05
887
888 MOD=02
889
890 CITEMP=3C(S)
891
892 temperature fluctuation=05
893
894
895 **Sampling multiple times and uplink together**
896
897 **AT+WMOD=3,1,60,20,-16,32,1**   
898
899 Explain:
900
901 * (% style="color:#037691" %)**parameter1:**(%%)Set Working Mode to **Mode 3**
902 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
903 * (% style="color:#037691" %)**parameter3:**(%%)Sampling Interval is **60**s.
904 * (% 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)
905 * (% style="color:#037691" %)**parameter5 & parameter6:**(%%)Temperature alarm range is **-16** to **32**°C,
906 * (% 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.
907
908 (% style="color:#4f81bd" %)**Downlink Command:**
909
910 **Example: **A50301003C14FFF0002001
911
912 MOD=03
913
914 TEMP=DS18B20
915
916 CITEMP=003C(S)
917
918 Total number of acquisitions=14
919
920 TEMPlow=FFF0
921
922 TEMPhigh=0020
923
924 ARTEMP=01
925
926 **Uplink payload( Fport=3)**
927
928 **Example: CBEA**01**0992**//0A41//**09C4**
929
930 BatV=CBEA
931
932 TEMP=DS18B20
933
934 Temp1=0992  ~/~/ 24.50℃
935
936 Temp2=0A41  ~/~/ 26.25℃
937
938 Temp3=09C4  ~/~/ 25.00℃
939
940 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
941
942 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
943 )))
944
945
946 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
947
948
949 (% class="box infomessage" %)
950 (((
951 (((
952 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
953 )))
954
955 (((
956 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
957 )))
958
959 (((
960 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
961 )))
962
963 (((
964 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
965 )))
966
967 (((
968 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
969 )))
970 )))
971
972 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
973
974 Total bytes: 8 bytes
975
976 **Example:**AA0100010001003C
977
978 WMOD=01
979
980 CITEMP=0001
981
982 TEMPlow=0001
983
984 TEMPhigh=003C
985
986
987 == 2.8 LED Indicator ==
988
989
990 The LHT65 has a triple color LED which for easy showing different stage .
991
992 While user press ACT button, the LED will work as per LED status with ACT button.
993
994 In a normal working state:
995
996 * For each uplink, the BLUE LED or RED LED will blink once.
997 BLUE LED when external sensor is connected.
998 * RED LED when external sensor is not connected
999 * For each success downlink, the PURPLE LED will blink once
1000
1001
1002
1003 == 2.9 installation ==
1004
1005
1006 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
1007
1008
1009 = 3. Sensors and Accessories =
1010
1011 == 3.1 E2 Extension Cable ==
1012
1013
1014 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
1015
1016
1017 **1m long breakout cable for LHT65N. Features:**
1018
1019 * (((
1020 Use for AT Command， works for both LHT52/LHT65N
1021 )))
1022 * (((
1023 Update firmware for LHT65N, works for both LHT52/LHT65N
1024 )))
1025 * (((
1026 Supports ADC mode to monitor external ADC
1027 )))
1028 * (((
1029 Supports Interrupt mode
1030 )))
1031 * (((
1032 Exposed All pins from the LHT65N Type-C connector.
1033
1034
1035
1036 )))
1037
1038 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1039
1040
1041 == 3.2 E3 Temperature Probe ==
1042
1043
1044 [[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"]]
1045
1046
1047 Temperature sensor with 2 meters cable long
1048
1049 * Resolution: 0.0625 °C
1050 * ±0.5°C accuracy from -10°C to +85°C
1051 * ±2°C accuracy from -55°C to +125°C
1052 * Operating Range: -40 ~~ 125 °C
1053 * Working voltage 2.35v ~~ 5v
1054
1055
1056
1057 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1058
1059
1060 (((
1061 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1062 )))
1063
1064 * (((
1065 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1066 )))
1067
1068 * (((
1069 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1070 )))
1071
1072 (((
1073 There are two kinds of commands to configure LHT65N, they are:
1074 )))
1075
1076 * (((
1077 (% style="color:#4f81bd" %)**General Commands**.
1078 )))
1079
1080 (((
1081 These commands are to configure:
1082 )))
1083
1084 1. (((
1085 General system settings like: uplink interval.
1086 )))
1087 1. (((
1088 LoRaWAN protocol & radio-related commands.
1089 )))
1090
1091 (((
1092 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]]
1093 )))
1094
1095 * (((
1096 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1097 )))
1098
1099 (((
1100 These commands are only valid for LHT65N, as below:
1101 )))
1102
1103
1104 == 4.1 Set Transmit Interval Time ==
1105
1106
1107 Feature: Change LoRaWAN End Node Transmit Interval.
1108
1109
1110 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1111
1112 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1113 |(% 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**
1114 |(% style="width:155px" %)AT+TDC?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1115 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1116
1117 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1118
1119 Format: Command Code (0x01) followed by 3 bytes time value.
1120
1121 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1122
1123 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1124
1125 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1126
1127
1128
1129 == 4.2 Set External Sensor Mode ==
1130
1131
1132 Feature: Change External Sensor Mode.
1133
1134
1135 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1136
1137
1138 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1139 |(% 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**
1140 |(% style="width:155px" %)AT+EXT?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1141 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1142 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1143
1144 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1145
1146 Total bytes: 2 ~~ 5 bytes
1147
1148 **Example:**
1149
1150 * 0xA201: Set external sensor type to E1
1151
1152 * 0xA209: Same as AT+EXT=9
1153
1154 * 0xA20702003c: Same as AT+SETCNT=60
1155
1156
1157
1158 == 4.3 Enable/Disable uplink Temperature probe ID ==
1159
1160
1161 (((
1162 Feature: If PID is enabled, device will send the temperature probe ID on:
1163 )))
1164
1165 * (((
1166 First Packet after OTAA Join
1167 )))
1168 * (((
1169 Every 24 hours since the first packet.
1170 )))
1171
1172 (((
1173 PID is default set to disable (0)
1174
1175
1176 )))
1177
1178 (% style="color:#4f81bd" %)**AT Command:**
1179
1180
1181 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1182 |(% 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**
1183 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1184
1185 (% style="color:#4f81bd" %)**Downlink Command:**
1186
1187 * **0xA800**  **~-~->** AT+PID=0
1188 * **0xA801**     **~-~->** AT+PID=1
1189
1190
1191
1192 == 4.4 Set Password ==
1193
1194
1195 Feature: Set device password, max 9 digits
1196
1197
1198 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1199
1200
1201 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1202 |(% 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**
1203 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1204 123456
1205
1206 OK
1207 )))
1208 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1209
1210 (% style="color:#4f81bd" %)**Downlink Command:**
1211
1212 No downlink command for this feature.
1213
1214
1215 == 4.5 Quit AT Command ==
1216
1217
1218 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1219
1220
1221 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1222
1223
1224 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1225 |(% 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**
1226 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1227
1228 (% style="color:#4f81bd" %)**Downlink Command:**
1229
1230 No downlink command for this feature.
1231
1232
1233 == 4.6 Set to sleep mode ==
1234
1235
1236 Feature: Set device to sleep mode
1237
1238 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1239 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1240
1241 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1242
1243
1244 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
1245 |(% 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**
1246 |(% style="width:155px" %)AT+SLEEP|(% style="width:139px" %)Set to sleep mode|(% style="width:213px" %)(((
1247 Clear all stored sensor data…
1248
1249 OK
1250 )))
1251
1252 (% style="color:#4f81bd" %)**Downlink Command:**
1253
1254 * There is no downlink command to set to Sleep mode.
1255
1256
1257
1258 == 4.7 Set system time ==
1259
1260
1261 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1262
1263
1264 (% style="color:#4f81bd" %)**AT Command:**
1265
1266
1267 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1268 |(% style="background-color:#d9e2f3; color:#0070c0; width:188px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:318px" %)**Function**
1269 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1270 OK
1271
1272 Set System time to 2021-01-20 00:59:12
1273 )))
1274
1275 (% style="color:#4f81bd" %)**Downlink Command:**
1276
1277 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1278
1279
1280 == 4.8 Set Time Sync Mode ==
1281
1282
1283 (((
1284 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1285 )))
1286
1287 (((
1288 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.
1289
1290
1291 )))
1292
1293 (% style="color:#4f81bd" %)**AT Command:**
1294
1295
1296 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1297 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1298 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1299
1300 (% style="color:#4f81bd" %)**Downlink Command:**
1301
1302 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1303 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1304
1305
1306 == 4.9 Set Time Sync Interval ==
1307
1308
1309 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1310
1311
1312 (% style="color:#4f81bd" %)**AT Command:**
1313
1314
1315 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1316 |(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:314px" %)**Function**
1317 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1318
1319 (% style="color:#4f81bd" %)**Downlink Command:**
1320
1321 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1322
1323
1324 == 4.10 Print data entries base on page. ==
1325
1326
1327 Feature: Print the sector data from start page to stop page (max is 416 pages).
1328
1329
1330 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1331
1332 [[image:image-20230426164330-2.png]]
1333
1334
1335 (% style="color:#4f81bd" %)**Downlink Command:**
1336
1337 No downlink commands for feature
1338
1339
1340 == 4.11 Print last few data entries. ==
1341
1342
1343 Feature: Print the last few data entries
1344
1345
1346 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1347
1348 [[image:image-20230426164932-3.png]]
1349
1350
1351 (% style="color:#4f81bd" %)**Downlink Command:**
1352
1353 No downlink commands for feature
1354
1355
1356 == 4.12 Clear Flash Record ==
1357
1358
1359 Feature: Clear flash storage for data log feature.
1360
1361
1362 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1363
1364
1365 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1366 |(% 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**
1367 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1368 Clear all stored sensor data…
1369
1370 OK
1371 )))
1372
1373 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1374
1375 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1376
1377
1378
1379 == 4.13 Auto Send None-ACK messages ==
1380
1381
1382 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.
1383
1384
1385 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1386
1387 The default factory setting is 0
1388
1389 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1390 |=(% 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**
1391 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1392
1393 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1394
1395 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1396
1397
1398
1399 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1400
1401
1402 Feature: Set internal and external temperature sensor alarms.
1403
1404 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1405 |=(% 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**
1406 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1407
1408 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1409
1410 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1411
1412 0): Cancel
1413
1414 1): Threshold alarm
1415
1416 2): Fluctuation alarm
1417
1418
1419 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1420
1421 (% 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.**
1422
1423
1424 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1425
1426 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1427
1428 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1429
1430
1431 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.
1432
1433 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1434
1435 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1436
1437
1438 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1439
1440 0xA5 00 ~-~- AT+WMOD=0.
1441
1442 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 )
1443
1444 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))
1445
1446 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1447
1448 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.
1449
1450
1451 = 5. Battery & How to replace =
1452
1453 == 5.1 Battery Type ==
1454
1455
1456 (((
1457 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.
1458 )))
1459
1460 (((
1461 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1462
1463
1464 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1465 )))
1466
1467 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1468
1469
1470 == 5.2 Replace Battery ==
1471
1472
1473 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.
1474
1475 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1476
1477
1478 == 5.3 Battery Life Analyze ==
1479
1480
1481 (((
1482 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:
1483 [[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]]
1484 )))
1485
1486
1487 (((
1488 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]]
1489 )))
1490
1491
1492 = 6. FAQ =
1493
1494 == 6.1 How to use AT Command? ==
1495
1496
1497 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.
1498
1499 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1500
1501
1502 **Connection:**
1503
1504 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1505 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1506 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1507
1508 (((
1509 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.
1510 )))
1511
1512
1513 Input password and ATZ to activate LHT65N,As shown below:
1514
1515 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1516
1517
1518 AT Command List is as below:
1519
1520 AT+<CMD>? :  Help on <CMD>
1521
1522 AT+<CMD> :  Run <CMD>
1523
1524 AT+<CMD>=<value> :  Set the value
1525
1526 AT+<CMD>=? :  Get the value
1527
1528 AT+DEBUG:  Set more info output
1529
1530 ATZ:  Trig a reset of the MCU
1531
1532 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1533
1534 AT+DEUI:  Get or Set the Device EUI
1535
1536 AT+DADDR:  Get or Set the Device Address
1537
1538 AT+APPKEY:  Get or Set the Application Key
1539
1540 AT+NWKSKEY:  Get or Set the Network Session Key
1541
1542 AT+APPSKEY:  Get or Set the Application Session Key
1543
1544 AT+APPEUI:  Get or Set the Application EUI
1545
1546 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1547
1548 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1549
1550 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1551
1552 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1553
1554 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1555
1556 AT+RX2FQ:  Get or Set the Rx2 window frequency
1557
1558 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1559
1560 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1561
1562 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1563
1564 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1565
1566 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1567
1568 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1569
1570 AT+NWKID:  Get or Set the Network ID
1571
1572 AT+FCU:  Get or Set the Frame Counter Uplink
1573
1574 AT+FCD:  Get or Set the Frame Counter Downlink
1575
1576 AT+CLASS:  Get or Set the Device Class
1577
1578 AT+JOIN:  Join network
1579
1580 AT+NJS:  Get the join status
1581
1582 AT+SENDB:  Send hexadecimal data along with the application port
1583
1584 AT+SEND:  Send text data along with the application port
1585
1586 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1587
1588 AT+RECV:  Print last received data in raw format
1589
1590 AT+VER:  Get current image version and Frequency Band
1591
1592 AT+CFM:  Get or Set the confirmation mode (0-1)
1593
1594 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1595
1596 AT+SNR:  Get the SNR of the last received packet
1597
1598 AT+RSSI:  Get the RSSI of the last received packet
1599
1600 AT+TDC:  Get or set the application data transmission interval in ms
1601
1602 AT+PORT:  Get or set the application port
1603
1604 AT+DISAT:  Disable AT commands
1605
1606 AT+PWORD: Set password, max 9 digits
1607
1608 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1609
1610 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1611
1612 AT+PDTA:  Print the sector data from start page to stop page
1613
1614 AT+PLDTA:  Print the last few sets of data
1615
1616 AT+CLRDTA:  Clear the storage, record position back to 1st
1617
1618 AT+SLEEP:  Set sleep mode
1619
1620 AT+EXT:  Get or Set external sensor model
1621
1622 AT+BAT:  Get the current battery voltage in mV
1623
1624 AT+CFG:  Print all configurations
1625
1626 AT+WMOD:  Get or Set Work Mode
1627
1628 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1629
1630 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1631
1632 AT+SETCNT:  Set the count at present
1633
1634 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1635
1636 AT+RPL:  Get or set response level
1637
1638 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1639
1640 AT+LEAPSEC:  Get or Set Leap Second
1641
1642 AT+SYNCMOD:  Get or Set time synchronization method
1643
1644 AT+SYNCTDC:  Get or set time synchronization interval in day
1645
1646 AT+PID:  Get or set the PID
1647
1648
1649 == 6.2 Where to use AT commands and Downlink commands ==
1650
1651
1652 **AT commands：**
1653
1654 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1655
1656
1657 **Downlink commands:**
1658
1659
1660 (% style="color:blue" %)**TTN:**
1661
1662 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1663
1664
1665
1666 (% style="color:blue" %)**Helium：**
1667
1668 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1669
1670
1671
1672 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1673
1674
1675 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1676
1677
1678 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1679
1680
1681
1682 (% style="color:blue" %)**Aws:**
1683
1684 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1685
1686
1687 == 6.3 How to change the uplink interval？ ==
1688
1689
1690 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);"]]
1691
1692
1693 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1694
1695
1696 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1697
1698 [[image:1655802313617-381.png||_mstalt="293917"]]
1699
1700
1701 (((
1702 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.
1703 )))
1704
1705
1706 Input password and ATZ to activate LHT65N,As shown below:
1707
1708 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1709
1710
1711 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1712
1713
1714 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1715
1716
1717 (% 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.
1718
1719 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1720
1721
1722
1723 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1724
1725 First connect the four lines；(% style="display:none" %)
1726
1727 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1728
1729
1730 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1731
1732 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1733
1734
1735
1736 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1737
1738 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1739
1740
1741 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1742
1743
1744 When this interface appears, it indicates that the download has been completed.
1745
1746 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1747
1748
1749 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1750
1751
1752 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1753
1754
1755 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1756
1757
1758 **UART Port of LHT65N:**
1759
1760 * (% class="mark" %)**PB0: RXD**
1761 * (% class="mark" %)**PB1: TXD**
1762 * (% class="mark" %)**GND**
1763
1764 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1765
1766
1767 (((
1768 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.
1769 )))
1770
1771
1772 Input password and ATZ to activate LHT65N,As shown below:
1773
1774 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1775
1776
1777 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1778
1779
1780 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1781
1782
1783 (% 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.
1784
1785 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1786
1787
1788
1789 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1790
1791 First connect the four lines；
1792
1793 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1794
1795 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1796
1797
1798
1799 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1800
1801 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1802
1803
1804 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1805
1806
1807 When this interface appears, it indicates that the download has been completed.
1808
1809 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1810
1811
1812 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1813
1814
1815 == 6.8 Why can't I see the datalog information ==
1816
1817
1818 ~1. The time is not aligned, and the correct query command is not used.
1819
1820 2. Decoder error, did not parse the datalog data, the data was filtered.
1821
1822
1823 = 7. Order Info =
1824
1825
1826 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1827
1828 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1829
1830 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1831 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1832 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1833 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1834 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1835 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1836 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1837 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1838
1839 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1840
1841 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1842
1843
1844
1845 = 8. Packing Info =
1846
1847
1848 **Package Includes**:
1849
1850 * LHT65N Temperature & Humidity Sensor x 1
1851 * Optional external sensor
1852
1853 **Dimension and weight**:
1854
1855 * Device Size:  10 x 10 x 3.5 mm
1856 * Device Weight: 120.5g
1857
1858
1859
1860 = 9. Reference material =
1861
1862
1863 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1864
1865
1866
1867 = 10. FCC Warning =
1868
1869
1870 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1871
1872 (1) This device may not cause harmful interference；
1873
1874 (2) this device must accept any interference received, including interference that may cause undesired operation.