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Version 237.3 by Xiaoling on 2023/04/26 17:09
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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
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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 == 1.3 Specification ==
61
62
63 (% style="color:#037691" %)**Built-in Temperature Sensor:**
64
65 * Resolution: 0.01 °C
66 * Accuracy Tolerance : Typ ±0.3 °C
67 * Long Term Drift: < 0.02 °C/yr
68 * Operating Range: -40 ~~ 85 °C
69
70 (% style="color:#037691" %)**Built-in Humidity Sensor:**
71
72 * Resolution: 0.04 %RH
73 * Accuracy Tolerance : Typ ±3 %RH
74 * Long Term Drift: < 0.02 °C/yr
75 * Operating Range: 0 ~~ 96 %RH
76
77 (% style="color:#037691" %)**External Temperature Sensor:**
78
79 * Resolution: 0.0625 °C
80 * ±0.5°C accuracy from -10°C to +85°C
81 * ±2°C accuracy from -55°C to +125°C
82 * Operating Range: -55 °C ~~ 125 °C
83
84 = 2. Connect LHT65N to IoT Server =
85
86 == 2.1 How does LHT65N work? ==
87
88
89 (((
90 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.
91 )))
92
93 (((
94 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.
95 )))
96
97
98 == 2.2 How to Activate LHT65N? ==
99
100
101 (((
102 The LHT65N has two working modes:
103 )))
104
105 * (((
106 (% 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.
107 )))
108 * (((
109 (% 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. 
110 )))
111
112 (((
113 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
114 )))
115
116
117 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
118
119 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
120 |=(% 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**
121 |(% 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" %)(((
122 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.
123 )))
124 |(% 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" %)(((
125 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
126 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
127 )))
128 |(% 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.
129
130 == 2.3 Example to join LoRaWAN network ==
131
132
133 (% class="wikigeneratedid" %)
134 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.
135
136
137 (% class="wikigeneratedid" %)
138 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
139
140
141 (((
142 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:
143 )))
144
145
146 === 2.3.1 Step 1: Create Device n TTN ===
147
148
149 (((
150 Create a device in TTN V3 with the OTAA keys from LHT65N.
151 )))
152
153 (((
154 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
155 )))
156
157 [[image:image-20230426083319-1.png]]
158
159 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
160
161 Add APP EUI in the application.
162
163
164 [[image:image-20220522232916-3.png||_mstalt="430495"]]
165
166
167 [[image:image-20220522232932-4.png||_mstalt="430157"]]
168
169
170 [[image:image-20220522232954-5.png||_mstalt="431847"]]
171
172
173
174 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
175
176
177 [[image:image-20220522233026-6.png||_mstalt="429403"]]
178
179
180 Input APP EUI,  APP KEY and DEV EUI:
181
182
183 [[image:image-20220522233118-7.png||_mstalt="430430"]]
184
185
186 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
187
188
189 (((
190 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.
191 )))
192
193 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
194
195
196 == 2.4 Uplink Payload   ( Fport~=2) ==
197
198
199 (((
200 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
201 )))
202
203 (((
204 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
205 )))
206
207 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
208 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
209 **Size(bytes)**
210 )))|=(% style="width: 30px;background-color:#D9E2F3" %)(((
211 **2**
212 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
213 **2**
214 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
215 **2**
216 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
217 **1**
218 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
219 **4**
220 )))
221 |(% style="width:97px" %)(((
222 **Value**
223 )))|(% style="width:39px" %)(((
224 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
225 )))|(% style="width:100px" %)(((
226 (((
227 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
228 )))
229 )))|(% style="width:77px" %)(((
230 (((
231 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
232 )))
233 )))|(% style="width:47px" %)(((
234 [[Ext>>||anchor="H2.4.5Ext23"]] #
235 )))|(% style="width:51px" %)(((
236 [[Ext value>>||anchor="H2.4.6Extvalue"]]
237 )))
238
239 * The First 6 bytes: has fix meanings for every LHT65N.
240
241 * The 7th byte (EXT #): defines the external sensor model.
242
243 * 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.)
244
245 === 2.4.1 Decoder in TTN V3 ===
246
247
248 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.
249
250 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]]
251
252
253 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
254
255
256 === 2.4.2 BAT-Battery Info ===
257
258
259 These two bytes of BAT include the battery state and the actually voltage.
260
261 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
262 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
263 **Bit(bit)**
264 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
265 |(% style="width:66px" %)(((
266 **Value**
267 )))|(% style="width:250px" %)(((
268 BAT Status
269 00(b): Ultra Low ( BAT <= 2.50v)
270 01(b): Low (2.50v <=BAT <= 2.55v)
271 10(b): OK (2.55v <= BAT <=2.65v)
272 11(b): Good (BAT >= 2.65v)
273 )))|(% style="width:152px" %)Actually BAT voltage
274
275 **(b)stands for binary**
276
277
278 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
279
280
281 Check the battery voltage for LHT65N.
282
283 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
284
285 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
286
287 === 2.4.3 Built-in Temperature ===
288
289
290 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
291
292 * Temperature:  0x0ABB/100=27.47℃
293
294 [[image:image-20220522235639-3.png||_mstalt="432120"]]
295
296 * Temperature:  (0xF5C6-65536)/100=-26.18℃
297
298 === 2.4.4 Built-in Humidity ===
299
300
301 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
302
303 * Humidity:    0x025C/10=60.4%
304
305 === 2.4.5 Ext # ===
306
307
308 Bytes for External Sensor:
309
310 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
311 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # Value**|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)**External Sensor Type**
312 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
313 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
314
315 === 2.4.6 Ext value ===
316
317 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
318
319
320 [[image:image-20220522235639-5.png||_mstalt="432848"]]
321
322
323 * DS18B20 temp=0x0ADD/100=27.81℃
324
325 The last 2 bytes of data are meaningless
326
327
328
329 [[image:image-20220522235639-6.png||_mstalt="433212"]]
330
331
332 * External temperature= (0xF54F-65536)/100=-27.37℃
333
334 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
335
336 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
337
338 The last 2 bytes of data are meaningless
339
340 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
341
342
343
344 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
345
346
347 (((
348 Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
349 )))
350
351
352 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
353 |=(% style="width: 50px;background-color:#D9E2F3" %)(((
354 **Size(bytes)**
355 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
356 **2**
357 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
358 **2**
359 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
360 **2**
361 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
362 **1**
363 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
364 **4**
365 )))
366 |(% style="width:110px" %)(((
367 **Value**
368 )))|(% style="width:71px" %)(((
369 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
370 )))|(% style="width:99px" %)(((
371 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
372 )))|(% style="width:132px" %)(((
373 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
374 )))|(% style="width:54px" %)(((
375 Status & Ext
376 )))|(% style="width:64px" %)(((
377 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
378 )))
379
380 * **Battery status & Built-in Humidity**
381
382 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
383 |=(% 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]
384 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
385 BAT Status
386 00(b): Ultra Low ( BAT <= 2.50v)
387 01(b): Low  (2.50v <=BAT <= 2.55v)
388 10(b): OK   (2.55v <= BAT <=2.65v)
389 11(b): Good   (BAT >= 2.65v)
390 )))|(% style="width:132px" %)(((
391 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
392 )))
393
394 * **Status & Ext Byte**
395
396 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
397 |=(% 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]**
398 |=(% 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)
399
400 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
401 * (% 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.
402 * (% 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)
403
404 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
405
406
407 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
408
409 be used to power the external ADC sensor; user can control the power on time for this
410
411 (% style="color:blue" %)**sensor by setting:**
412
413 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
414
415 **For example:**
416
417 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
418
419
420 Or use **downlink command A2** to set the same.
421
422 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
423
424 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.
425
426 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
427
428
429 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
430
431 [[image:image-20220628150714-4.png||_mstalt="431054"]]
432
433
434 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.
435
436
437 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
438
439 [[image:image-20220628151005-5.png||_mstalt="429546"]]
440
441
442 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
443
444 [[image:image-20220628151056-6.png||_mstalt="431873"]]
445
446
447 3) Within range
448
449 [[image:image-20220628151143-7.png||_mstalt="431210"]]
450
451
452
453 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
454
455
456 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
457
458
459 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
460
461 [[image:image-20220906102307-7.png||_mstalt="430443"]]
462
463
464 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
465
466 The external cable NE2 can be use for MOD4 and MOD8
467
468
469
470 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
471
472
473 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
474
475
476 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
477
478 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
479
480 In Open State, the power consumption is the same as if there is no probe
481
482 In Close state, the power consumption will be 3uA higher than normal.
483
484 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
485
486
487 Ext=4,Interrupt Sensor：
488
489 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
490 |(% style="width:101px" %)(((
491 **AT+EXT=4,1**
492 )))|(% style="width:395px" %)(((
493 **Sent uplink packet in both rising and falling interrupt**
494 )))
495 |(% style="width:101px" %)(((
496 **AT+EXT=4,2**
497 )))|(% style="width:395px" %)(((
498 **Sent uplink packet only in falling interrupt**
499 )))
500 |(% style="width:101px" %)(((
501 **AT+EXT=4,3**
502 )))|(% style="width:395px" %)(((
503 **Sent uplink packet only in rising interrupt**
504 )))
505
506 Trigger by falling edge:
507
508 [[image:image-20220906101145-2.png||_mstalt="428324"]]
509
510
511 Trigger by raising edge：
512
513 [[image:image-20220906101145-3.png||_mstalt="428688"]]
514
515
516
517 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
518
519
520 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
521
522
523 (% 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.
524
525 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
526
527
528 (% 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
529
530 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
531
532
533 Ext=8, Counting Sensor ( 4 bytes)：
534
535 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
536 |(% style="width:131px" %)(((
537 **AT+EXT=8,0**
538 )))|(% style="width:195px" %)(((
539 **Count at falling interrupt**
540 )))
541 |(% style="width:131px" %)(((
542 **AT+EXT=8,1**
543 )))|(% style="width:195px" %)(((
544 **Count at rising interrupt**
545 )))
546 |(% style="width:131px" %)(((
547 **AT+SETCNT=60**
548 )))|(% style="width:195px" %)(((
549 **Sent current count to 60**
550 )))
551
552 [[image:image-20220906101320-6.png||_mstalt="428064"]]
553
554
555 (% style="color:blue" %)**A2 downlink Command：**
556
557 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
558
559 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
560
561 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
562
563 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
564
565 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)
566
567
568 == 2.5 Show data on Datacake ==
569
570
571 (((
572 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:
573 )))
574
575
576 (((
577 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
578 )))
579
580 (((
581 (% 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.
582 )))
583
584
585 (((
586 Add Datacake:
587 )))
588
589
590 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
591
592
593
594 Select default key as Access Key:
595
596
597 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
598
599
600 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
601
602
603 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
604
605
606 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
607
608
609 == 2.6 Datalog Feature ==
610
611
612 (((
613 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.
614 )))
615
616
617 === 2.6.1 Ways to get datalog via LoRaWAN ===
618
619
620 There are two methods:
621
622 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
623
624
625 (% 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.
626
627
628 (% style="color:red" %)**Note for method 2:**
629
630 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
631 * 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.
632
633 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
634
635
636 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
637
638
639 === 2.6.2 Unix TimeStamp ===
640
641
642 LHT65N uses Unix TimeStamp format based on
643
644
645 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
646
647
648
649 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
650
651 Below is the converter example
652
653 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
654
655
656 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
657
658
659 === 2.6.3 Set Device Time ===
660
661
662 (((
663 (% style="color:blue" %)**There are two ways to set device's time:**
664 )))
665
666 (((
667 **1.  Through LoRaWAN MAC Command (Default settings)**
668 )))
669
670 (((
671 User need to set SYNCMOD=1 to enable sync time via MAC command.
672 )))
673
674 (((
675 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).
676 )))
677
678 (((
679 (% 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.**
680 )))
681
682
683 (((
684 **2. Manually Set Time**
685 )))
686
687 (((
688 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
689 )))
690
691
692 === 2.6.4 Poll sensor value ===
693
694
695 User can poll sensor value based on timestamps from the server. Below is the downlink command.
696
697 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
698 |(% style="width:58px" %)1byte|(% style="width:128px" %)4bytes|(% style="width:123px" %)4bytes|(% style="width:116px" %)1byte
699 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
700
701 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.
702
703 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
704
705 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
706
707 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
708
709
710 === 2.6.5 Datalog Uplink payload ===
711
712
713 The Datalog poll reply uplink will use below payload format.
714
715 **Retrieval data payload:**
716
717 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
718 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
719 **Size(bytes)**
720 )))|=(% 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**
721 |(% 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"]]
722
723 **Poll message flag & Ext:**
724
725 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
726
727 (% 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)
728
729 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
730
731 * Poll Message Flag is set to 1.
732
733 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
734
735 For example, in US915 band, the max payload for different DR is:
736
737 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
738
739 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
740
741 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
742
743 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
744
745 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
746
747
748 **Example:**
749
750 If LHT65N has below data inside Flash:
751
752 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:717px" %)
753 |=(% style="width: 92px; background-color:#D9E2F3;color:#0070C0" %)Flash Add|=(% style="width: 126px; background-color:#D9E2F3;color:#0070C0" %)**Unix Time**|=(% style="width: 50px; background-color:#D9E2F3;color:#0070C0" %)**Ext**|=(% style="width: 104px;background-color:#D9E2F3;color:#0070C0" %)**BAT voltage**|=(% style="width: 341px; background-color:#D9E2F3;color:#0070C0" %)**Value**
754 |(% style="width:92px" %)80196E0|(% style="width:126px" %)21/1/19 04:27:03|(% style="width:50px" %)1|(% style="width:104px" %)3145|(% style="width:341px" %)sht_temp=22.00 sht_hum=32.6 ds_temp=327.67
755
756 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
757
758
759 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
760
761 Where : Start time: 60065F97 = time 21/1/19 04:27:03
762
763 Stop time: 60066DA7= time 21/1/19 05:27:03
764
765
766 **LHT65N will uplink this payload.**
767
768 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
769
770
771 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
772
773 Where the first 11 bytes is for the first entry:
774
775 7FFF089801464160065F97
776
777 Ext sensor data=0x7FFF/100=327.67
778
779 Temp=0x088E/100=22.00
780
781 Hum=0x014B/10=32.6
782
783 poll message flag & Ext=0x41,means reply data,Ext=1
784
785 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
786
787
788 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
789
790
791 (((
792 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.
793 )))
794
795 (((
796 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
797
798
799 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
800
801
802 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
803
804 (((
805 (% class="box infomessage" %)
806 (((
807 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
808
809 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
810
811 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
812
813 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
814
815 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
816
817 **AT+LEDALARM=1** :       Enable LED visual Alarm.
818 )))
819 )))
820
821 (% style="color:#4f81bd" %)**Downlink Command:**
822
823 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
824
825 AT+CITEMP=1 : A60001
826
827 AT+ARTEMP=1,60  :  A70001003C
828
829 AT+ARTEMP=-16,60 :  A7FFF0003C
830
831 AT+LEDALARM=1  :  3601
832
833
834 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
835
836 Total bytes: 8 bytes
837
838 **Example: **AA0100010001003C
839
840 WMOD=01
841
842 CITEMP=0001
843
844 TEMPlow=0001
845
846 TEMPhigh=003C
847
848
849 **DS18B20 and TMP117 Threshold Alarm**
850
851 **~ AT+WMOD=1,60,-10,20**
852
853 (% style="color:#4f81bd" %)**Downlink Command:**
854
855 **Example: **A5013CFC180014
856
857 MOD=01
858
859 CITEMP=3C(S)
860
861 TEMPlow=FC18
862
863 TEMPhigh=0014
864
865
866 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
867
868 **AT+WMOD=2,60,5** 
869
870 (% style="color:#4f81bd" %)**Downlink Command:**
871
872 **Example: **A5023C05
873
874 MOD=02
875
876 CITEMP=3C(S)
877
878 temperature fluctuation=05
879
880
881 **Sampling multiple times and uplink together**
882
883 **AT+WMOD=3,1,60,20,-16,32,1**   
884
885 Explain:
886
887 * (% style="color:#037691" %)**parameter1:**(%%)Set Working Mode to **Mode 3**
888 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
889 * (% style="color:#037691" %)**parameter3:**(%%)Sampling Interval is **60**s.
890 * (% 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)
891 * (% style="color:#037691" %)**parameter5 & parameter6:**(%%)Temperature alarm range is **-16** to **32**°C,
892 * (% 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.
893
894 (% style="color:#4f81bd" %)**Downlink Command:**
895
896 **Example: **A50301003C14FFF0002001
897
898 MOD=03
899
900 TEMP=DS18B20
901
902 CITEMP=003C(S)
903
904 Total number of acquisitions=14
905
906 TEMPlow=FFF0
907
908 TEMPhigh=0020
909
910 ARTEMP=01
911
912 **Uplink payload( Fport=3)**
913
914 **Example: CBEA**01**0992**//0A41//**09C4**
915
916 BatV=CBEA
917
918 TEMP=DS18B20
919
920 Temp1=0992  ~/~/ 24.50℃
921
922 Temp2=0A41  ~/~/ 26.25℃
923
924 Temp3=09C4  ~/~/ 25.00℃
925
926 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
927
928 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
929 )))
930
931
932 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
933
934
935 (% class="box infomessage" %)
936 (((
937 (((
938 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
939 )))
940
941 (((
942 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
943 )))
944
945 (((
946 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
947 )))
948
949 (((
950 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
951 )))
952
953 (((
954 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
955 )))
956 )))
957
958 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
959
960 Total bytes: 8 bytes
961
962 **Example:**AA0100010001003C
963
964 WMOD=01
965
966 CITEMP=0001
967
968 TEMPlow=0001
969
970 TEMPhigh=003C
971
972
973 == 2.8 LED Indicator ==
974
975
976 The LHT65 has a triple color LED which for easy showing different stage .
977
978 While user press ACT button, the LED will work as per LED status with ACT button.
979
980 In a normal working state:
981
982 * For each uplink, the BLUE LED or RED LED will blink once.
983 BLUE LED when external sensor is connected.
984 * RED LED when external sensor is not connected
985 * For each success downlink, the PURPLE LED will blink once
986
987 == 2.9 installation ==
988
989
990 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
991
992
993 = 3. Sensors and Accessories =
994
995 == 3.1 E2 Extension Cable ==
996
997
998 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
999
1000
1001 **1m long breakout cable for LHT65N. Features:**
1002
1003 * (((
1004 Use for AT Command， works for both LHT52/LHT65N
1005 )))
1006 * (((
1007 Update firmware for LHT65N, works for both LHT52/LHT65N
1008 )))
1009 * (((
1010 Supports ADC mode to monitor external ADC
1011 )))
1012 * (((
1013 Supports Interrupt mode
1014 )))
1015 * (((
1016 Exposed All pins from the LHT65N Type-C connector.
1017
1018
1019
1020 )))
1021
1022 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1023
1024
1025 == 3.2 E3 Temperature Probe ==
1026
1027
1028 [[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"]]
1029
1030
1031 Temperature sensor with 2 meters cable long
1032
1033 * Resolution: 0.0625 °C
1034 * ±0.5°C accuracy from -10°C to +85°C
1035 * ±2°C accuracy from -55°C to +125°C
1036 * Operating Range: -40 ~~ 125 °C
1037 * Working voltage 2.35v ~~ 5v
1038
1039 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1040
1041
1042 (((
1043 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1044 )))
1045
1046 * (((
1047 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1048 )))
1049
1050 * (((
1051 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1052 )))
1053
1054 (((
1055 There are two kinds of commands to configure LHT65N, they are:
1056 )))
1057
1058 * (((
1059 (% style="color:#4f81bd" %)**General Commands**.
1060 )))
1061
1062 (((
1063 These commands are to configure:
1064 )))
1065
1066 1. (((
1067 General system settings like: uplink interval.
1068 )))
1069 1. (((
1070 LoRaWAN protocol & radio-related commands.
1071 )))
1072
1073 (((
1074 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]]
1075 )))
1076
1077 * (((
1078 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1079 )))
1080
1081 (((
1082 These commands are only valid for LHT65N, as below:
1083 )))
1084
1085
1086 == 4.1 Set Transmit Interval Time ==
1087
1088
1089 Feature: Change LoRaWAN End Node Transmit Interval.
1090
1091
1092 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1093
1094 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1095 |(% 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**
1096 |(% style="width:155px" %)AT+TDC?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1097 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1098
1099
1100 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1101
1102 Format: Command Code (0x01) followed by 3 bytes time value.
1103
1104 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1105
1106 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1107
1108 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1109
1110 == 4.2 Set External Sensor Mode ==
1111
1112
1113 Feature: Change External Sensor Mode.
1114
1115
1116 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1117
1118
1119 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1120 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:151px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Response**
1121 |(% style="width:155px" %)AT+EXT?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1122 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1123 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1124
1125
1126 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1127
1128 Total bytes: 2 ~~ 5 bytes
1129
1130 **Example:**
1131
1132 * 0xA201: Set external sensor type to E1
1133
1134 * 0xA209: Same as AT+EXT=9
1135
1136 * 0xA20702003c: Same as AT+SETCNT=60
1137
1138 == 4.3 Enable/Disable uplink Temperature probe ID ==
1139
1140
1141 (((
1142 Feature: If PID is enabled, device will send the temperature probe ID on:
1143 )))
1144
1145 * (((
1146 First Packet after OTAA Join
1147 )))
1148 * (((
1149 Every 24 hours since the first packet.
1150 )))
1151
1152 (((
1153 PID is default set to disable (0)
1154
1155
1156 )))
1157
1158 (% style="color:#4f81bd" %)**AT Command:**
1159
1160
1161 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1162 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:136px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:86px" %)**Response**
1163 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1164
1165
1166 (% style="color:#4f81bd" %)**Downlink Command:**
1167
1168 * **0xA800**  **~-~->** AT+PID=0
1169 * **0xA801**     **~-~->** AT+PID=1
1170
1171 == 4.4 Set Password ==
1172
1173
1174 Feature: Set device password, max 9 digits
1175
1176
1177 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1178
1179
1180 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1181 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:124px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:86px" %)**Response**
1182 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1183 123456
1184
1185 OK
1186 )))
1187 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1188
1189
1190 (% style="color:#4f81bd" %)**Downlink Command:**
1191
1192 No downlink command for this feature.
1193
1194
1195 == 4.5 Quit AT Command ==
1196
1197
1198 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1199
1200
1201 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1202
1203
1204 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1205 |(% 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**
1206 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1207
1208
1209 (% style="color:#4f81bd" %)**Downlink Command:**
1210
1211 No downlink command for this feature.
1212
1213
1214 == 4.6 Set to sleep mode ==
1215
1216
1217 Feature: Set device to sleep mode
1218
1219 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1220 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1221
1222 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1223
1224
1225 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
1226 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:139px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:213px" %)**Response**
1227 |(% style="width:155px" %)AT+SLEEP|(% style="width:139px" %)Set to sleep mode|(% style="width:213px" %)(((
1228 Clear all stored sensor data…
1229
1230 OK
1231 )))
1232
1233 (% style="color:#4f81bd" %)**Downlink Command:**
1234
1235 * There is no downlink command to set to Sleep mode.
1236
1237 == 4.7 Set system time ==
1238
1239
1240 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1241
1242
1243 (% style="color:#4f81bd" %)**AT Command:**
1244
1245
1246 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1247 |(% style="background-color:#d9e2f3; color:#0070c0; width:154px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:285px" %)**Function**
1248 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1249 OK
1250
1251 Set System time to 2021-01-20 00:59:12
1252 )))
1253
1254
1255 (% style="color:#4f81bd" %)**Downlink Command:**
1256
1257 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1258
1259
1260 == 4.8 Set Time Sync Mode ==
1261
1262
1263 (((
1264 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1265 )))
1266
1267 (((
1268 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.
1269
1270
1271 )))
1272
1273 (% style="color:#4f81bd" %)**AT Command:**
1274
1275
1276 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1277 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1278 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1279
1280
1281 (% style="color:#4f81bd" %)**Downlink Command:**
1282
1283 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1284 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1285
1286
1287 == 4.9 Set Time Sync Interval ==
1288
1289
1290 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1291
1292
1293 (% style="color:#4f81bd" %)**AT Command:**
1294
1295
1296 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1297 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:311px" %)**Function**
1298 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1299
1300
1301 (% style="color:#4f81bd" %)**Downlink Command:**
1302
1303 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1304
1305
1306 == 4.10 Print data entries base on page. ==
1307
1308
1309 Feature: Print the sector data from start page to stop page (max is 416 pages).
1310
1311
1312 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1313
1314 [[image:image-20230426164330-2.png]]
1315
1316
1317
1318
1319 (% style="color:#4f81bd" %)**Downlink Command:**
1320
1321 No downlink commands for feature
1322
1323
1324 == 4.11 Print last few data entries. ==
1325
1326
1327 Feature: Print the last few data entries
1328
1329
1330 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1331
1332 [[image:image-20230426164932-3.png]]
1333
1334
1335
1336
1337 (% style="color:#4f81bd" %)**Downlink Command:**
1338
1339 No downlink commands for feature
1340
1341
1342 == 4.12 Clear Flash Record ==
1343
1344
1345 Feature: Clear flash storage for data log feature.
1346
1347
1348 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1349
1350
1351 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1352 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:134px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:209px" %)**Response**
1353 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1354 Clear all stored sensor data…
1355
1356 OK
1357 )))
1358
1359
1360 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1361
1362 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1363
1364 == 4.13 Auto Send None-ACK messages ==
1365
1366
1367 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.
1368
1369
1370 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1371
1372 The default factory setting is 0
1373
1374 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1375 |=(% style="width: 158px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 118px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 87px;background-color:#D9E2F3;color:#0070C0" %)**Response**
1376 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1377
1378 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1379
1380 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1381
1382 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1383
1384
1385 Feature: Set internal and external temperature sensor alarms.
1386
1387 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1388 |=(% 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**
1389 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1390
1391 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1392
1393 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1394
1395 0): Cancel
1396
1397 1): Threshold alarm
1398
1399 2): Fluctuation alarm
1400
1401
1402 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1403
1404 (% 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.**
1405
1406
1407 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1408
1409 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1410
1411 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1412
1413
1414 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.
1415
1416 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1417
1418 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1419
1420
1421 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1422
1423 0xA5 00 ~-~- AT+WMOD=0.
1424
1425 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 )
1426
1427 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))
1428
1429 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1430
1431 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.
1432
1433
1434 = 5. Battery & How to replace =
1435
1436 == 5.1 Battery Type ==
1437
1438
1439 (((
1440 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.
1441 )))
1442
1443 (((
1444 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1445
1446
1447 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1448 )))
1449
1450 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1451
1452
1453 == 5.2 Replace Battery ==
1454
1455
1456 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.
1457
1458 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1459
1460
1461 == 5.3 Battery Life Analyze ==
1462
1463
1464 (((
1465 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:
1466 [[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]]
1467 )))
1468
1469
1470 (((
1471 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]]
1472 )))
1473
1474
1475 = 6. FAQ =
1476
1477 == 6.1 How to use AT Command? ==
1478
1479
1480 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.
1481
1482 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1483
1484
1485 **Connection:**
1486
1487 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1488 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1489 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1490
1491 (((
1492 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.
1493 )))
1494
1495
1496 Input password and ATZ to activate LHT65N,As shown below:
1497
1498 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1499
1500
1501 AT Command List is as below:
1502
1503 AT+<CMD>? :  Help on <CMD>
1504
1505 AT+<CMD> :  Run <CMD>
1506
1507 AT+<CMD>=<value> :  Set the value
1508
1509 AT+<CMD>=? :  Get the value
1510
1511 AT+DEBUG:  Set more info output
1512
1513 ATZ:  Trig a reset of the MCU
1514
1515 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1516
1517 AT+DEUI:  Get or Set the Device EUI
1518
1519 AT+DADDR:  Get or Set the Device Address
1520
1521 AT+APPKEY:  Get or Set the Application Key
1522
1523 AT+NWKSKEY:  Get or Set the Network Session Key
1524
1525 AT+APPSKEY:  Get or Set the Application Session Key
1526
1527 AT+APPEUI:  Get or Set the Application EUI
1528
1529 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1530
1531 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1532
1533 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1534
1535 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1536
1537 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1538
1539 AT+RX2FQ:  Get or Set the Rx2 window frequency
1540
1541 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1542
1543 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1544
1545 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1546
1547 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1548
1549 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1550
1551 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1552
1553 AT+NWKID:  Get or Set the Network ID
1554
1555 AT+FCU:  Get or Set the Frame Counter Uplink
1556
1557 AT+FCD:  Get or Set the Frame Counter Downlink
1558
1559 AT+CLASS:  Get or Set the Device Class
1560
1561 AT+JOIN:  Join network
1562
1563 AT+NJS:  Get the join status
1564
1565 AT+SENDB:  Send hexadecimal data along with the application port
1566
1567 AT+SEND:  Send text data along with the application port
1568
1569 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1570
1571 AT+RECV:  Print last received data in raw format
1572
1573 AT+VER:  Get current image version and Frequency Band
1574
1575 AT+CFM:  Get or Set the confirmation mode (0-1)
1576
1577 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1578
1579 AT+SNR:  Get the SNR of the last received packet
1580
1581 AT+RSSI:  Get the RSSI of the last received packet
1582
1583 AT+TDC:  Get or set the application data transmission interval in ms
1584
1585 AT+PORT:  Get or set the application port
1586
1587 AT+DISAT:  Disable AT commands
1588
1589 AT+PWORD: Set password, max 9 digits
1590
1591 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1592
1593 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1594
1595 AT+PDTA:  Print the sector data from start page to stop page
1596
1597 AT+PLDTA:  Print the last few sets of data
1598
1599 AT+CLRDTA:  Clear the storage, record position back to 1st
1600
1601 AT+SLEEP:  Set sleep mode
1602
1603 AT+EXT:  Get or Set external sensor model
1604
1605 AT+BAT:  Get the current battery voltage in mV
1606
1607 AT+CFG:  Print all configurations
1608
1609 AT+WMOD:  Get or Set Work Mode
1610
1611 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1612
1613 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1614
1615 AT+SETCNT:  Set the count at present
1616
1617 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1618
1619 AT+RPL:  Get or set response level
1620
1621 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1622
1623 AT+LEAPSEC:  Get or Set Leap Second
1624
1625 AT+SYNCMOD:  Get or Set time synchronization method
1626
1627 AT+SYNCTDC:  Get or set time synchronization interval in day
1628
1629 AT+PID:  Get or set the PID
1630
1631
1632 == 6.2 Where to use AT commands and Downlink commands ==
1633
1634
1635 **AT commands：**
1636
1637 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1638
1639
1640 **Downlink commands:**
1641
1642
1643 (% style="color:blue" %)**TTN:**
1644
1645 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1646
1647
1648
1649 (% style="color:blue" %)**Helium：**
1650
1651 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1652
1653
1654
1655 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1656
1657
1658 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1659
1660
1661 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1662
1663
1664
1665 (% style="color:blue" %)**Aws:**
1666
1667 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1668
1669
1670 == 6.3 How to change the uplink interval？ ==
1671
1672
1673 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);"]]
1674
1675
1676 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1677
1678
1679 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1680
1681 [[image:1655802313617-381.png||_mstalt="293917"]]
1682
1683
1684 (((
1685 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.
1686 )))
1687
1688
1689 Input password and ATZ to activate LHT65N,As shown below:
1690
1691 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1692
1693
1694 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1695
1696
1697 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1698
1699
1700 (% 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.
1701
1702 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1703
1704
1705
1706 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1707
1708 First connect the four lines；(% style="display:none" %)
1709
1710 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1711
1712
1713 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1714
1715 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1716
1717
1718
1719 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1720
1721 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1722
1723
1724 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1725
1726
1727 When this interface appears, it indicates that the download has been completed.
1728
1729 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1730
1731
1732 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1733
1734
1735 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1736
1737
1738 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1739
1740
1741 **UART Port of LHT65N:**
1742
1743 * (% class="mark" %)**PB0: RXD**
1744 * (% class="mark" %)**PB1: TXD**
1745 * (% class="mark" %)**GND**
1746
1747 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1748
1749
1750 (((
1751 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.
1752 )))
1753
1754
1755 Input password and ATZ to activate LHT65N,As shown below:
1756
1757 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1758
1759
1760 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1761
1762
1763 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1764
1765
1766 (% 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.
1767
1768 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1769
1770
1771
1772 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1773
1774 First connect the four lines；
1775
1776 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1777
1778 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1779
1780
1781
1782 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1783
1784 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1785
1786
1787 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1788
1789
1790 When this interface appears, it indicates that the download has been completed.
1791
1792 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1793
1794
1795 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1796
1797
1798 == 6.8 Why can't I see the datalog information ==
1799
1800
1801 ~1. The time is not aligned, and the correct query command is not used.
1802
1803 2. Decoder error, did not parse the datalog data, the data was filtered.
1804
1805
1806 = 7. Order Info =
1807
1808
1809 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1810
1811 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1812
1813 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1814 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1815 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1816 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1817 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1818 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1819 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1820 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1821
1822 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1823
1824 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1825
1826 = 8. Packing Info =
1827
1828
1829 **Package Includes**:
1830
1831 * LHT65N Temperature & Humidity Sensor x 1
1832 * Optional external sensor
1833
1834 **Dimension and weight**:
1835
1836 * Device Size:  10 x 10 x 3.5 mm
1837 * Device Weight: 120.5g
1838
1839 = 9. Reference material =
1840
1841
1842 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1843
1844 = 10. FCC Warning =
1845
1846
1847 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1848
1849 (1) This device may not cause harmful interference；
1850
1851 (2) this device must accept any interference received, including interference that may cause undesired operation.