Skip to Content
Version 242.1 by Ellie Zhang on 2023/05/08 11:29
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
5
6
7
8 **Table of Contents：**
9
10 {{toc/}}
11
12
13
14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
23 )))
24
25 (((
26 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46
47 == 1.2 Features ==
48
49
50 * LoRaWAN v1.0.3 Class A protocol
51 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
52 * AT Commands to change parameters
53 * Remote configure parameters via LoRaWAN Downlink
54 * Firmware upgradeable via program port
55 * Built-in 2400mAh battery for up to 10 years of use.
56 * Built-in Temperature & Humidity sensor
57 * Optional External Sensors
58 * Tri-color LED to indicate working status
59 * Datalog feature (Max 3328 records)
60
61 == 1.3 Specification ==
62
63
64 (% style="color:#037691" %)**Built-in Temperature Sensor:**
65
66 * Resolution: 0.01 °C
67 * Accuracy Tolerance : Typ ±0.3 °C
68 * Long Term Drift: < 0.02 °C/yr
69 * Operating Range: -40 ~~ 85 °C
70
71 (% style="color:#037691" %)**Built-in Humidity Sensor:**
72
73 * Resolution: 0.04 %RH
74 * Accuracy Tolerance : Typ ±3 %RH
75 * Long Term Drift: < 0.02 °C/yr
76 * Operating Range: 0 ~~ 96 %RH
77
78 (% style="color:#037691" %)**External Temperature Sensor:**
79
80 * Resolution: 0.0625 °C
81 * ±0.5°C accuracy from -10°C to +85°C
82 * ±2°C accuracy from -55°C to +125°C
83 * Operating Range: -55 °C ~~ 125 °C
84
85 = 2. Connect LHT65N to IoT Server =
86
87 == 2.1 How does LHT65N work? ==
88
89
90 (((
91 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.
92 )))
93
94 (((
95 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.
96 )))
97
98
99 == 2.2 How to Activate LHT65N? ==
100
101
102 (((
103 The LHT65N has two working modes:
104 )))
105
106 * (((
107 (% 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.
108 )))
109 * (((
110 (% 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. 
111 )))
112
113 (((
114 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
115 )))
116
117
118 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
119
120 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
121 |=(% 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**
122 |(% 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" %)(((
123 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.
124 )))
125 |(% 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" %)(((
126 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
127 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
128 )))
129 |(% 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.
130
131 == 2.3 Example to join LoRaWAN network ==
132
133
134 (% class="wikigeneratedid" %)
135 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.
136
137
138 (% class="wikigeneratedid" %)
139 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
140
141
142 (((
143 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:
144 )))
145
146
147 === 2.3.1 Step 1: Create Device n TTN ===
148
149
150 (((
151 Create a device in TTN V3 with the OTAA keys from LHT65N.
152 )))
153
154 (((
155 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
156 )))
157
158 [[image:image-20230426083319-1.png]]
159
160 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
161
162 Add APP EUI in the application.
163
164
165 [[image:image-20220522232916-3.png||_mstalt="430495"]]
166
167
168 [[image:image-20220522232932-4.png||_mstalt="430157"]]
169
170
171 [[image:image-20220522232954-5.png||_mstalt="431847"]]
172
173
174
175 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
176
177
178 [[image:image-20220522233026-6.png||_mstalt="429403"]]
179
180
181 Input APP EUI,  APP KEY and DEV EUI:
182
183
184 [[image:image-20220522233118-7.png||_mstalt="430430"]]
185
186
187 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
188
189
190 (((
191 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.
192 )))
193
194 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
195
196
197 == 2.4 Uplink Payload   ( Fport~=2) ==
198
199
200 (((
201 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
202 )))
203
204 (((
205 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
206 )))
207
208 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
209 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
210 **Size(bytes)**
211 )))|=(% style="width: 30px;background-color:#D9E2F3" %)(((
212 **2**
213 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
214 **2**
215 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
216 **2**
217 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
218 **1**
219 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
220 **4**
221 )))
222 |(% style="width:97px" %)(((
223 **Value**
224 )))|(% style="width:39px" %)(((
225 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
226 )))|(% style="width:100px" %)(((
227 (((
228 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
229 )))
230 )))|(% style="width:77px" %)(((
231 (((
232 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
233 )))
234 )))|(% style="width:47px" %)(((
235 [[Ext>>||anchor="H2.4.5Ext23"]] #
236 )))|(% style="width:51px" %)(((
237 [[Ext value>>||anchor="H2.4.6Extvalue"]]
238 )))
239
240 * The First 6 bytes: has fix meanings for every LHT65N.
241
242 * The 7th byte (EXT #): defines the external sensor model.
243
244 * 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.)
245
246 === 2.4.1 Decoder in TTN V3 ===
247
248
249 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.
250
251 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]]
252
253
254 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
255
256
257 === 2.4.2 BAT-Battery Info ===
258
259
260 These two bytes of BAT include the battery state and the actually voltage.
261
262 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
263 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
264 **Bit(bit)**
265 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
266 |(% style="width:66px" %)(((
267 **Value**
268 )))|(% style="width:250px" %)(((
269 BAT Status
270 00(b): Ultra Low ( BAT <= 2.50v)
271 01(b): Low (2.50v <=BAT <= 2.55v)
272 10(b): OK (2.55v <= BAT <=2.65v)
273 11(b): Good (BAT >= 2.65v)
274 )))|(% style="width:152px" %)Actually BAT voltage
275
276 **(b)stands for binary**
277
278
279 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
280
281
282 Check the battery voltage for LHT65N.
283
284 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
285
286 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
287
288 === 2.4.3 Built-in Temperature ===
289
290
291 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
292
293 * Temperature:  0x0ABB/100=27.47℃
294
295 [[image:image-20220522235639-3.png||_mstalt="432120"]]
296
297 * Temperature:  (0xF5C6-65536)/100=-26.18℃
298
299 === 2.4.4 Built-in Humidity ===
300
301
302 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
303
304 * Humidity:    0x025C/10=60.4%
305
306 === 2.4.5 Ext # ===
307
308
309 Bytes for External Sensor:
310
311 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
312 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # Value**|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)**External Sensor Type**
313 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
314 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
315
316 === 2.4.6 Ext value ===
317
318 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
319
320
321 [[image:image-20220522235639-5.png||_mstalt="432848"]]
322
323
324 * DS18B20 temp=0x0ADD/100=27.81℃
325
326 The last 2 bytes of data are meaningless
327
328
329
330 [[image:image-20220522235639-6.png||_mstalt="433212"]]
331
332
333 * External temperature= (0xF54F-65536)/100=-27.37℃
334
335 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
336
337 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
338
339 The last 2 bytes of data are meaningless
340
341 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
342
343
344
345 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
346
347
348 (((
349 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:
350 )))
351
352
353 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
354 |=(% style="width: 50px;background-color:#D9E2F3" %)(((
355 **Size(bytes)**
356 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
357 **2**
358 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
359 **2**
360 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
361 **2**
362 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
363 **1**
364 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
365 **4**
366 )))
367 |(% style="width:110px" %)(((
368 **Value**
369 )))|(% style="width:71px" %)(((
370 External temperature
371 )))|(% style="width:99px" %)(((
372 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
373 )))|(% style="width:132px" %)(((
374 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
375 )))|(% style="width:54px" %)(((
376 Status & Ext
377 )))|(% style="width:64px" %)(((
378 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
379 )))
380
381 * **Battery status & Built-in Humidity**
382
383 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
384 |=(% 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]
385 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
386 BAT Status
387 00(b): Ultra Low ( BAT <= 2.50v)
388 01(b): Low  (2.50v <=BAT <= 2.55v)
389 10(b): OK   (2.55v <= BAT <=2.65v)
390 11(b): Good   (BAT >= 2.65v)
391 )))|(% style="width:132px" %)(((
392 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
393 )))
394
395 * **Status & Ext Byte**
396
397 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
398 |=(% 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]**
399 |=(% 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)
400
401 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
402 * (% 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.
403 * (% 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)
404
405 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
406
407
408 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
409
410 be used to power the external ADC sensor; user can control the power on time for this
411
412 (% style="color:blue" %)**sensor by setting:**
413
414 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
415
416 **For example:**
417
418 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
419
420
421 Or use **downlink command A2** to set the same.
422
423 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
424
425 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.
426
427 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
428
429
430 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
431
432 [[image:image-20220628150714-4.png||_mstalt="431054"]]
433
434
435 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.
436
437
438 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
439
440 [[image:image-20220628151005-5.png||_mstalt="429546"]]
441
442
443 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
444
445 [[image:image-20220628151056-6.png||_mstalt="431873"]]
446
447
448 3) Within range
449
450 [[image:image-20220628151143-7.png||_mstalt="431210"]]
451
452
453
454 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
455
456
457 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
458
459
460 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
461
462 [[image:image-20220906102307-7.png||_mstalt="430443"]]
463
464
465 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
466
467 The external cable NE2 can be use for MOD4 and MOD8
468
469
470
471 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
472
473
474 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
475
476
477 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
478
479 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
480
481 In Open State, the power consumption is the same as if there is no probe
482
483 In Close state, the power consumption will be 3uA higher than normal.
484
485 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
486
487
488 Ext=4,Interrupt Sensor：
489
490 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
491 |(% style="width:101px" %)(((
492 **AT+EXT=4,1**
493 )))|(% style="width:395px" %)(((
494 **Sent uplink packet in both rising and falling interrupt**
495 )))
496 |(% style="width:101px" %)(((
497 **AT+EXT=4,2**
498 )))|(% style="width:395px" %)(((
499 **Sent uplink packet only in falling interrupt**
500 )))
501 |(% style="width:101px" %)(((
502 **AT+EXT=4,3**
503 )))|(% style="width:395px" %)(((
504 **Sent uplink packet only in rising interrupt**
505 )))
506
507 Trigger by falling edge:
508
509 [[image:image-20220906101145-2.png||_mstalt="428324"]]
510
511
512 Trigger by raising edge：
513
514 [[image:image-20220906101145-3.png||_mstalt="428688"]]
515
516
517
518 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
519
520
521 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
522
523
524 (% 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.
525
526 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
527
528
529 (% 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
530
531 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
532
533
534 Ext=8, Counting Sensor ( 4 bytes)：
535
536 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
537 |(% style="width:131px" %)(((
538 **AT+EXT=8,0**
539 )))|(% style="width:195px" %)(((
540 **Count at falling interrupt**
541 )))
542 |(% style="width:131px" %)(((
543 **AT+EXT=8,1**
544 )))|(% style="width:195px" %)(((
545 **Count at rising interrupt**
546 )))
547 |(% style="width:131px" %)(((
548 **AT+SETCNT=60**
549 )))|(% style="width:195px" %)(((
550 **Sent current count to 60**
551 )))
552
553 [[image:image-20220906101320-6.png||_mstalt="428064"]]
554
555
556 (% style="color:blue" %)**A2 downlink Command：**
557
558 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
559
560 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
561
562 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
563
564 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
565
566 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)
567
568
569 == 2.5 Show data on Datacake ==
570
571
572 (((
573 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:
574 )))
575
576
577 (((
578 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
579 )))
580
581 (((
582 (% 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.
583 )))
584
585
586 (((
587 Add Datacake:
588 )))
589
590
591 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
592
593
594
595 Select default key as Access Key:
596
597
598 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
599
600
601 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
602
603
604 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
605
606
607 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
608
609
610 == 2.6 Datalog Feature ==
611
612
613 (((
614 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.
615 )))
616
617
618 === 2.6.1 Ways to get datalog via LoRaWAN ===
619
620
621 There are two methods:
622
623 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
624
625
626 (% 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.
627
628
629 (% style="color:red" %)**Note for method 2:**
630
631 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
632 * 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.
633
634 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
635
636
637 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
638
639
640 === 2.6.2 Unix TimeStamp ===
641
642
643 LHT65N uses Unix TimeStamp format based on
644
645
646 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
647
648
649
650 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
651
652 Below is the converter example
653
654 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
655
656
657 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
658
659
660 === 2.6.3 Set Device Time ===
661
662
663 (((
664 (% style="color:blue" %)**There are two ways to set device's time:**
665 )))
666
667 (((
668 **1.  Through LoRaWAN MAC Command (Default settings)**
669 )))
670
671 (((
672 User need to set SYNCMOD=1 to enable sync time via MAC command.
673 )))
674
675 (((
676 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).
677 )))
678
679 (((
680 (% 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.**
681 )))
682
683
684 (((
685 **2. Manually Set Time**
686 )))
687
688 (((
689 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
690 )))
691
692
693 === 2.6.4 Poll sensor value ===
694
695
696 User can poll sensor value based on timestamps from the server. Below is the downlink command.
697
698 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
699 |(% style="width:58px" %)1byte|(% style="width:128px" %)4bytes|(% style="width:123px" %)4bytes|(% style="width:116px" %)1byte
700 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
701
702 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.
703
704 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
705
706 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
707
708 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
709
710
711 === 2.6.5 Datalog Uplink payload ===
712
713
714 The Datalog poll reply uplink will use below payload format.
715
716 **Retrieval data payload:**
717
718 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
719 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
720 **Size(bytes)**
721 )))|=(% 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**
722 |(% 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"]]
723
724 **Poll message flag & Ext:**
725
726 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
727
728 (% 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)
729
730 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
731
732 * Poll Message Flag is set to 1.
733
734 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
735
736 For example, in US915 band, the max payload for different DR is:
737
738 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
739
740 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
741
742 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
743
744 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
745
746 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
747
748
749 **Example:**
750
751 If LHT65N has below data inside Flash:
752
753 [[image:image-20230426171833-4.png]]
754
755
756 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
757
758 Where : Start time: 60065F97 = time 21/1/19 04:27:03
759
760 Stop time: 60066DA7= time 21/1/19 05:27:03
761
762
763 **LHT65N will uplink this payload.**
764
765 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
766
767
768 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
769
770 Where the first 11 bytes is for the first entry:
771
772 7FFF089801464160065F97
773
774 Ext sensor data=0x7FFF/100=327.67
775
776 Temp=0x088E/100=22.00
777
778 Hum=0x014B/10=32.6
779
780 poll message flag & Ext=0x41,means reply data,Ext=1
781
782 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
783
784
785 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
786
787
788 (((
789 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.
790 )))
791
792 (((
793 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
794
795
796 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
797
798
799 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
800
801 (((
802 (% class="box infomessage" %)
803 (((
804 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
805
806 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
807
808 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
809
810 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
811
812 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
813
814 **AT+LEDALARM=1** :       Enable LED visual Alarm.
815 )))
816 )))
817
818 (% style="color:#4f81bd" %)**Downlink Command:**
819
820 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
821
822 AT+CITEMP=1 : A60001
823
824 AT+ARTEMP=1,60  :  A70001003C
825
826 AT+ARTEMP=-16,60 :  A7FFF0003C
827
828 AT+LEDALARM=1  :  3601
829
830
831 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
832
833 Total bytes: 8 bytes
834
835 **Example: **AA0100010001003C
836
837 WMOD=01
838
839 CITEMP=0001
840
841 TEMPlow=0001
842
843 TEMPhigh=003C
844
845
846 **DS18B20 and TMP117 Threshold Alarm**
847
848 **~ AT+WMOD=1,60,-10,20**
849
850 (% style="color:#4f81bd" %)**Downlink Command:**
851
852 **Example: **A5013CFC180014
853
854 MOD=01
855
856 CITEMP=3C(S)
857
858 TEMPlow=FC18
859
860 TEMPhigh=0014
861
862
863 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
864
865 **AT+WMOD=2,60,5** 
866
867 (% style="color:#4f81bd" %)**Downlink Command:**
868
869 **Example: **A5023C05
870
871 MOD=02
872
873 CITEMP=3C(S)
874
875 temperature fluctuation=05
876
877
878 **Sampling multiple times and uplink together**
879
880 **AT+WMOD=3,1,60,20,-16,32,1**   
881
882 Explain:
883
884 * (% style="color:#037691" %)**parameter1:**(%%)Set Working Mode to **Mode 3**
885 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
886 * (% style="color:#037691" %)**parameter3:**(%%)Sampling Interval is **60**s.
887 * (% 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)
888 * (% style="color:#037691" %)**parameter5 & parameter6:**(%%)Temperature alarm range is **-16** to **32**°C,
889 * (% 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.
890
891 (% style="color:#4f81bd" %)**Downlink Command:**
892
893 **Example: **A50301003C14FFF0002001
894
895 MOD=03
896
897 TEMP=DS18B20
898
899 CITEMP=003C(S)
900
901 Total number of acquisitions=14
902
903 TEMPlow=FFF0
904
905 TEMPhigh=0020
906
907 ARTEMP=01
908
909 **Uplink payload( Fport=3)**
910
911 **Example: CBEA**01**0992**//0A41//**09C4**
912
913 BatV=CBEA
914
915 TEMP=DS18B20
916
917 Temp1=0992  ~/~/ 24.50℃
918
919 Temp2=0A41  ~/~/ 26.25℃
920
921 Temp3=09C4  ~/~/ 25.00℃
922
923 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
924
925 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
926 )))
927
928
929 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
930
931
932 (% class="box infomessage" %)
933 (((
934 (((
935 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
936 )))
937
938 (((
939 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
940 )))
941
942 (((
943 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
944 )))
945
946 (((
947 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
948 )))
949
950 (((
951 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
952 )))
953 )))
954
955 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
956
957 Total bytes: 8 bytes
958
959 **Example:**AA0100010001003C
960
961 WMOD=01
962
963 CITEMP=0001
964
965 TEMPlow=0001
966
967 TEMPhigh=003C
968
969
970 == 2.8 LED Indicator ==
971
972
973 The LHT65 has a triple color LED which for easy showing different stage .
974
975 While user press ACT button, the LED will work as per LED status with ACT button.
976
977 In a normal working state:
978
979 * For each uplink, the BLUE LED or RED LED will blink once.
980 BLUE LED when external sensor is connected.
981 * RED LED when external sensor is not connected
982 * For each success downlink, the PURPLE LED will blink once
983
984 == 2.9 installation ==
985
986
987 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
988
989
990 = 3. Sensors and Accessories =
991
992 == 3.1 E2 Extension Cable ==
993
994
995 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
996
997
998 **1m long breakout cable for LHT65N. Features:**
999
1000 * (((
1001 Use for AT Command， works for both LHT52/LHT65N
1002 )))
1003 * (((
1004 Update firmware for LHT65N, works for both LHT52/LHT65N
1005 )))
1006 * (((
1007 Supports ADC mode to monitor external ADC
1008 )))
1009 * (((
1010 Supports Interrupt mode
1011 )))
1012 * (((
1013 Exposed All pins from the LHT65N Type-C connector.
1014
1015
1016
1017 )))
1018
1019 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1020
1021
1022 == 3.2 E3 Temperature Probe ==
1023
1024
1025 [[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"]]
1026
1027
1028 Temperature sensor with 2 meters cable long
1029
1030 * Resolution: 0.0625 °C
1031 * ±0.5°C accuracy from -10°C to +85°C
1032 * ±2°C accuracy from -55°C to +125°C
1033 * Operating Range: -40 ~~ 125 °C
1034 * Working voltage 2.35v ~~ 5v
1035
1036 == 3.3 E31F Temperature Probe ==
1037
1038
1039 [[image:65N-E31F-1.jpg||height="161" width="162"]] [[image:65N-E31F.jpg||height="192" width="194"]]
1040
1041
1042 Temperature sensor with 1 meters cable long
1043
1044 * Resolution: 0.01 °C
1045 * Accuracy Tolerance : Typical ±0.3 °C
1046 * Long Term Drift: < 0.02 °C/yr
1047 * Operating Range: -40 ~~ 125 °C
1048 * Working voltage 2.35v ~~ 5v
1049
1050 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1051
1052
1053 (((
1054 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1055 )))
1056
1057 * (((
1058 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1059 )))
1060
1061 * (((
1062 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1063 )))
1064
1065 (((
1066 There are two kinds of commands to configure LHT65N, they are:
1067 )))
1068
1069 * (((
1070 (% style="color:#4f81bd" %)**General Commands**.
1071 )))
1072
1073 (((
1074 These commands are to configure:
1075 )))
1076
1077 1. (((
1078 General system settings like: uplink interval.
1079 )))
1080 1. (((
1081 LoRaWAN protocol & radio-related commands.
1082 )))
1083
1084 (((
1085 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]]
1086 )))
1087
1088 * (((
1089 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1090 )))
1091
1092 (((
1093 These commands are only valid for LHT65N, as below:
1094 )))
1095
1096
1097 == 4.1 Set Transmit Interval Time ==
1098
1099
1100 Feature: Change LoRaWAN End Node Transmit Interval.
1101
1102
1103 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1104
1105 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1106 |(% 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**
1107 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1108 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1109
1110 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1111
1112 Format: Command Code (0x01) followed by 3 bytes time value.
1113
1114 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1115
1116 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1117
1118 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1119
1120 == 4.2 Set External Sensor Mode ==
1121
1122
1123 Feature: Change External Sensor Mode.
1124
1125
1126 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1127
1128
1129 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1130 |(% 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**
1131 |(% style="width:155px" %)AT+EXT=?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1132 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1133 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1134
1135 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1136
1137 Total bytes: 2 ~~ 5 bytes
1138
1139 **Example:**
1140
1141 * 0xA201: Set external sensor type to E1
1142
1143 * 0xA209: Same as AT+EXT=9
1144
1145 * 0xA20702003c: Same as AT+SETCNT=60
1146
1147 == 4.3 Enable/Disable uplink Temperature probe ID ==
1148
1149
1150 (((
1151 Feature: If PID is enabled, device will send the temperature probe ID on:
1152 )))
1153
1154 * (((
1155 First Packet after OTAA Join
1156 )))
1157 * (((
1158 Every 24 hours since the first packet.
1159 )))
1160
1161 (((
1162 PID is default set to disable (0)
1163
1164
1165 )))
1166
1167 (% style="color:#4f81bd" %)**AT Command:**
1168
1169 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1170 |(% 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**
1171 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1172
1173 (% style="color:#4f81bd" %)**Downlink Command:**
1174
1175 * **0xA800**  **~-~->** AT+PID=0
1176 * **0xA801**     **~-~->** AT+PID=1
1177
1178 == 4.4 Set Password ==
1179
1180
1181 Feature: Set device password, max 9 digits
1182
1183 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1184
1185 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1186 |(% 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**
1187 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1188 123456
1189
1190 OK
1191 )))
1192 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1193
1194 (% style="color:#4f81bd" %)**Downlink Command:**
1195
1196 No downlink command for this feature.
1197
1198
1199 == 4.5 Quit AT Command ==
1200
1201
1202 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1203
1204 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1205
1206 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1207 |(% 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**
1208 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1209
1210 (% style="color:#4f81bd" %)**Downlink Command:**
1211
1212 No downlink command for this feature.
1213
1214
1215 == 4.6 Set to sleep mode ==
1216
1217
1218 Feature: Set device to sleep mode
1219
1220 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1221 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1222
1223 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
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:140px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:218px" %)**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 (% style="color:#4f81bd" %)**AT Command:**
1243
1244 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1245 |(% style="background-color:#d9e2f3; color:#0070c0; width:188px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:318px" %)**Function**
1246 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1247 OK
1248
1249 Set System time to 2021-01-20 00:59:12
1250 )))
1251
1252 (% style="color:#4f81bd" %)**Downlink Command:**
1253
1254 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1255
1256
1257 == 4.8 Set Time Sync Mode ==
1258
1259
1260 (((
1261 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1262 )))
1263
1264 (((
1265 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.
1266 )))
1267
1268 (% style="color:#4f81bd" %)**AT Command:**
1269
1270 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1271 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1272 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1273
1274 (% style="color:#4f81bd" %)**Downlink Command:**
1275
1276 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1277 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1278
1279
1280 == 4.9 Set Time Sync Interval ==
1281
1282
1283 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1284
1285 (% style="color:#4f81bd" %)**AT Command:**
1286
1287 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1288 |(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:314px" %)**Function**
1289 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1290
1291 (% style="color:#4f81bd" %)**Downlink Command:**
1292
1293 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1294
1295
1296 == 4.10 Print data entries base on page. ==
1297
1298
1299 Feature: Print the sector data from start page to stop page (max is 416 pages).
1300
1301 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1302
1303 [[image:image-20230426164330-2.png]]
1304
1305
1306 (% style="color:#4f81bd" %)**Downlink Command:**
1307
1308 No downlink commands for feature
1309
1310
1311 == 4.11 Print last few data entries. ==
1312
1313
1314 Feature: Print the last few data entries
1315
1316 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1317
1318 [[image:image-20230426164932-3.png]]
1319
1320
1321 (% style="color:#4f81bd" %)**Downlink Command:**
1322
1323 No downlink commands for feature
1324
1325
1326 == 4.12 Clear Flash Record ==
1327
1328
1329 Feature: Clear flash storage for data log feature.
1330
1331
1332 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1333
1334
1335 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1336 |(% 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**
1337 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1338 Clear all stored sensor data…
1339
1340 OK
1341 )))
1342
1343 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1344
1345 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1346
1347 == 4.13 Auto Send None-ACK messages ==
1348
1349
1350 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.
1351
1352 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1353
1354 The default factory setting is 0
1355
1356 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1357 |=(% 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**
1358 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1359
1360 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1361
1362 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1363
1364 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1365
1366
1367 Feature: Set internal and external temperature sensor alarms.
1368
1369 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1370 |=(% 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**
1371 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1372
1373 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1374
1375 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1376
1377 0): Cancel
1378
1379 1): Threshold alarm
1380
1381 2): Fluctuation alarm
1382
1383
1384 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1385
1386 (% 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.**
1387
1388
1389 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1390
1391 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1392
1393 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1394
1395
1396 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.
1397
1398 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1399
1400 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1401
1402
1403 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1404
1405 0xA5 00 ~-~- AT+WMOD=0.
1406
1407 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 )
1408
1409 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))
1410
1411 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1412
1413 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.
1414
1415
1416 = 5. Battery & How to replace =
1417
1418 == 5.1 Battery Type ==
1419
1420
1421 (((
1422 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.
1423 )))
1424
1425 (((
1426 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1427
1428
1429 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1430 )))
1431
1432 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1433
1434
1435 == 5.2 Replace Battery ==
1436
1437
1438 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.
1439
1440 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1441
1442
1443 == 5.3 Battery Life Analyze ==
1444
1445
1446 (((
1447 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:
1448 [[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]]
1449 )))
1450
1451
1452 (((
1453 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]]
1454 )))
1455
1456
1457 = 6. FAQ =
1458
1459 == 6.1 How to use AT Command? ==
1460
1461
1462 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.
1463
1464 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1465
1466
1467 **Connection:**
1468
1469 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1470 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1471 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1472
1473 (((
1474 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.
1475 )))
1476
1477
1478 Input password and ATZ to activate LHT65N,As shown below:
1479
1480 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1481
1482
1483 AT Command List is as below:
1484
1485 AT+<CMD>? :  Help on <CMD>
1486
1487 AT+<CMD> :  Run <CMD>
1488
1489 AT+<CMD>=<value> :  Set the value
1490
1491 AT+<CMD>=? :  Get the value
1492
1493 AT+DEBUG:  Set more info output
1494
1495 ATZ:  Trig a reset of the MCU
1496
1497 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1498
1499 AT+DEUI:  Get or Set the Device EUI
1500
1501 AT+DADDR:  Get or Set the Device Address
1502
1503 AT+APPKEY:  Get or Set the Application Key
1504
1505 AT+NWKSKEY:  Get or Set the Network Session Key
1506
1507 AT+APPSKEY:  Get or Set the Application Session Key
1508
1509 AT+APPEUI:  Get or Set the Application EUI
1510
1511 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1512
1513 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1514
1515 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1516
1517 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1518
1519 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1520
1521 AT+RX2FQ:  Get or Set the Rx2 window frequency
1522
1523 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1524
1525 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1526
1527 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1528
1529 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1530
1531 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1532
1533 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1534
1535 AT+NWKID:  Get or Set the Network ID
1536
1537 AT+FCU:  Get or Set the Frame Counter Uplink
1538
1539 AT+FCD:  Get or Set the Frame Counter Downlink
1540
1541 AT+CLASS:  Get or Set the Device Class
1542
1543 AT+JOIN:  Join network
1544
1545 AT+NJS:  Get the join status
1546
1547 AT+SENDB:  Send hexadecimal data along with the application port
1548
1549 AT+SEND:  Send text data along with the application port
1550
1551 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1552
1553 AT+RECV:  Print last received data in raw format
1554
1555 AT+VER:  Get current image version and Frequency Band
1556
1557 AT+CFM:  Get or Set the confirmation mode (0-1)
1558
1559 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1560
1561 AT+SNR:  Get the SNR of the last received packet
1562
1563 AT+RSSI:  Get the RSSI of the last received packet
1564
1565 AT+TDC:  Get or set the application data transmission interval in ms
1566
1567 AT+PORT:  Get or set the application port
1568
1569 AT+DISAT:  Disable AT commands
1570
1571 AT+PWORD: Set password, max 9 digits
1572
1573 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1574
1575 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1576
1577 AT+PDTA:  Print the sector data from start page to stop page
1578
1579 AT+PLDTA:  Print the last few sets of data
1580
1581 AT+CLRDTA:  Clear the storage, record position back to 1st
1582
1583 AT+SLEEP:  Set sleep mode
1584
1585 AT+EXT:  Get or Set external sensor model
1586
1587 AT+BAT:  Get the current battery voltage in mV
1588
1589 AT+CFG:  Print all configurations
1590
1591 AT+WMOD:  Get or Set Work Mode
1592
1593 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1594
1595 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1596
1597 AT+SETCNT:  Set the count at present
1598
1599 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1600
1601 AT+RPL:  Get or set response level
1602
1603 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1604
1605 AT+LEAPSEC:  Get or Set Leap Second
1606
1607 AT+SYNCMOD:  Get or Set time synchronization method
1608
1609 AT+SYNCTDC:  Get or set time synchronization interval in day
1610
1611 AT+PID:  Get or set the PID
1612
1613
1614 == 6.2 Where to use AT commands and Downlink commands ==
1615
1616
1617 **AT commands：**
1618
1619 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1620
1621
1622 **Downlink commands:**
1623
1624
1625 (% style="color:blue" %)**TTN:**
1626
1627 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1628
1629
1630
1631 (% style="color:blue" %)**Helium：**
1632
1633 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1634
1635
1636
1637 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1638
1639
1640 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1641
1642
1643 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1644
1645
1646
1647 (% style="color:blue" %)**Aws:**
1648
1649 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1650
1651
1652 == 6.3 How to change the uplink interval？ ==
1653
1654
1655 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);"]]
1656
1657
1658 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1659
1660
1661 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1662
1663 [[image:1655802313617-381.png||_mstalt="293917"]]
1664
1665
1666 (((
1667 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.
1668 )))
1669
1670
1671 Input password and ATZ to activate LHT65N,As shown below:
1672
1673 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1674
1675
1676 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1677
1678
1679 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1680
1681
1682 (% 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.
1683
1684 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1685
1686
1687
1688 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1689
1690 First connect the four lines；(% style="display:none" %)
1691
1692 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1693
1694
1695 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1696
1697 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1698
1699
1700
1701 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1702
1703 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1704
1705
1706 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1707
1708
1709 When this interface appears, it indicates that the download has been completed.
1710
1711 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1712
1713
1714 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1715
1716
1717 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1718
1719
1720 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1721
1722
1723 **UART Port of LHT65N:**
1724
1725 * (% class="mark" %)**PB0: RXD**
1726 * (% class="mark" %)**PB1: TXD**
1727 * (% class="mark" %)**GND**
1728
1729 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1730
1731
1732 (((
1733 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.
1734 )))
1735
1736
1737 Input password and ATZ to activate LHT65N,As shown below:
1738
1739 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1740
1741
1742 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1743
1744
1745 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1746
1747
1748 (% 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.
1749
1750 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1751
1752
1753
1754 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1755
1756 First connect the four lines；
1757
1758 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1759
1760 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1761
1762
1763
1764 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1765
1766 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1767
1768
1769 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1770
1771
1772 When this interface appears, it indicates that the download has been completed.
1773
1774 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1775
1776
1777 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1778
1779
1780 == 6.8 Why can't I see the datalog information ==
1781
1782
1783 ~1. The time is not aligned, and the correct query command is not used.
1784
1785 2. Decoder error, did not parse the datalog data, the data was filtered.
1786
1787
1788 = 7. Order Info =
1789
1790
1791 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1792
1793 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1794
1795 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1796 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1797 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1798 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1799 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1800 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1801 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1802 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1803
1804 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1805
1806 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1807
1808 = 8. Packing Info =
1809
1810
1811 **Package Includes**:
1812
1813 * LHT65N Temperature & Humidity Sensor x 1
1814 * Optional external sensor
1815
1816 **Dimension and weight**:
1817
1818 * Device Size:  10 x 10 x 3.5 mm
1819 * Device Weight: 120.5g
1820
1821 = 9. Reference material =
1822
1823
1824 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1825
1826 = 10. FCC Warning =
1827
1828
1829 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1830
1831 (1) This device may not cause harmful interference；
1832
1833 (2) this device must accept any interference received, including interference that may cause undesired operation.