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Version 261.2 by Xiaoling on 2023/07/17 15:24
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1 (% style="text-align:center" %)
2 [[image:image-20230717152014-10.png||height="575" width="339"]]
3
4
5
6 **Table of Contents:**
7
8 {{toc/}}
9
10
11
12
13
14 = 1. Introduction =
15
16 == 1.1 What is LHT65N LoRaWAN (% style="display:none" %) (%%)Temperature & Humidity Sensor ==
17
18
19 (((
20 The Dragino LHT65N (% style="display:none" %) (%%)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.**
21 )))
22
23 (((
24 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.
25 )))
26
27 (((
28 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
29 )))
30
31 (((
32 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
33 )))
34
35 (((
36 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.
37 )))
38
39 (((
40 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
41 )))
42
43
44 == 1.2 Features ==
45
46
47 * LoRaWAN v1.0.3 Class A protocol
48 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
49 * AT Commands to change parameters
50 * Remote configure parameters via LoRaWAN Downlink
51 * Firmware upgradeable via program port
52 * Built-in 2400mAh battery for up to 10 years of use.
53 * Built-in Temperature & Humidity sensor
54 * Optional External Sensors
55 * Tri-color LED to indicate working status
56 * Datalog feature (Max 3328 records)
57
58
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
85
86 = 2. Connect LHT65N to IoT Server =
87
88 == 2.1 How does LHT65N work? ==
89
90
91 (((
92 LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
93 )))
94
95 (((
96 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
97 )))
98
99
100 == 2.2 How to Activate LHT65N? ==
101
102
103 (((
104 The LHT65N has two working modes:
105 )))
106
107 * (((
108 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
109 )))
110 * (((
111 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
112 )))
113
114 (((
115 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
116 )))
117
118
119 [[image:image-20230717144740-2.png||height="391" width="267"]]
120
121 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
122 |=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)**Action**
123 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT between 1s < time < 3s|(% style="background-color:#f2f2f2; width:117px" %)Test uplink status|(% style="background-color:#f2f2f2; width:225px" %)(((
124 If LHT65N is already Joined to rhe LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has external sensor connected,(% style="color:blue" %)**Blue led** (%%)will blink once. If LHT65N has not external sensor, (% style="color:red" %)**Red led**(%%) will blink once.
125 )))
126 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT for more than 3s|(% style="background-color:#f2f2f2; width:117px" %)Active Device|(% style="background-color:#f2f2f2; width:225px" %)(((
127 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
128 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
129 )))
130 |(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means LHT65N is in Deep Sleep Mode.
131
132
133 == 2.3 Example to join LoRaWAN network ==
134
135
136 (% class="wikigeneratedid" %)
137 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
138
139
140 (% class="wikigeneratedid" %)
141 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
142
143
144 (((
145 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
146 )))
147
148
149 === 2.3.1 Step 1: Create Device n TTN ===
150
151
152 (((
153 Create a device in TTN V3 with the OTAA keys from LHT65N.
154 )))
155
156 (((
157 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
158 )))
159
160 [[image:image-20230426083319-1.png||height="258" width="556"]]
161
162 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
163
164 Add APP EUI in the application.
165
166
167 [[image:image-20220522232916-3.png||_mstalt="430495"]]
168
169
170 [[image:image-20220522232932-4.png||_mstalt="430157"]]
171
172
173 [[image:image-20220522232954-5.png||_mstalt="431847"]]
174
175
176
177 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
178
179
180 [[image:image-20220522233026-6.png||_mstalt="429403"]]
181
182
183 Input APP EUI,  APP KEY and DEV EUI:
184
185
186 [[image:image-20220522233118-7.png||_mstalt="430430"]]
187
188
189 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
190
191
192 (((
193 Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
194 )))
195
196 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
197
198
199 == 2.4 Uplink Payload (Fport~=2) ==
200
201
202 (((
203 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
204 )))
205
206 (((
207 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
208 )))
209
210 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
211 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
212 **Size(bytes)**
213 )))|=(% style="width: 30px;background-color:#D9E2F3;color:#0070C0" %)(((
214 **2**
215 )))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)(((
216 **2**
217 )))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)(((
218 **2**
219 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
220 **1**
221 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
222 **4**
223 )))
224 |(% style="width:97px" %)(((
225 **Value**
226 )))|(% style="width:39px" %)(((
227 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
228 )))|(% style="width:100px" %)(((
229 (((
230 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
231 )))
232 )))|(% style="width:77px" %)(((
233 (((
234 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
235 )))
236 )))|(% style="width:47px" %)(((
237 [[Ext>>||anchor="H2.4.5Ext23"]] #
238 )))|(% style="width:51px" %)(((
239 [[Ext value>>||anchor="H2.4.6Extvalue"]]
240 )))
241
242 * The First 6 bytes: has fix meanings for every LHT65N.
243
244 * The 7th byte (EXT #): defines the external sensor model.
245
246 * The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won't be these four bytes.)
247
248
249
250 === 2.4.1 Decoder in TTN V3 ===
251
252
253 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.
254
255 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]]
256
257
258 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
259
260
261 === 2.4.2 BAT-Battery Info ===
262
263
264 These two bytes of BAT include the battery state and the actually voltage.
265
266 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
267 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
268 **Bit(bit)**
269 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
270 |(% style="width:66px" %)(((
271 **Value**
272 )))|(% style="width:250px" %)(((
273 BAT Status
274 00(b): Ultra Low ( BAT <= 2.50v)
275 01(b): Low (2.50v <=BAT <= 2.55v)
276 10(b): OK (2.55v <= BAT <=2.65v)
277 11(b): Good (BAT >= 2.65v)
278 )))|(% style="width:152px" %)Actually BAT voltage
279
280 **(b)stands for binary**
281
282
283 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
284
285
286 Check the battery voltage for LHT65N.
287
288 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
289
290 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
291
292
293
294 === 2.4.3 Built-in Temperature ===
295
296
297 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
298
299 * Temperature:  0x0ABB/100=27.47℃
300
301 [[image:image-20220522235639-3.png||_mstalt="432120"]]
302
303 * Temperature:  (0xF5C6-65536)/100=-26.18℃
304
305
306
307 (% style="display:none" %)
308
309 === 2.4.4 Built-in Humidity ===
310
311
312 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
313
314 * Humidity:    0x025C/10=60.4%
315
316
317
318 (% style="display:none" %)
319
320 === 2.4.5 Ext # ===
321
322
323 Bytes for External Sensor:
324
325 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
326 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # **Value|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)External Sensor Type
327 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
328 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
329
330
331 === 2.4.6 Ext value ===
332
333 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
334
335
336 [[image:image-20220522235639-5.png||_mstalt="432848"]]
337
338
339 * DS18B20 temp=0x0ADD/100=27.81℃
340
341 The last 2 bytes of data are meaningless
342
343
344
345 [[image:image-20220522235639-6.png||_mstalt="433212"]]
346
347
348 * External temperature= (0xF54F-65536)/100=-27.37℃
349
350 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
351
352 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
353
354 The last 2 bytes of data are meaningless
355
356 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
357
358
359
360 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
361
362
363 (((
364 Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
365 )))
366
367 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
368 |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
369 **Size(bytes)**
370 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
371 **2**
372 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
373 **2**
374 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
375 **2**
376 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
377 **1**
378 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
379 **4**
380 )))
381 |(% style="width:110px" %)(((
382 **Value**
383 )))|(% style="width:71px" %)(((
384 External temperature
385 )))|(% style="width:99px" %)(((
386 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
387 )))|(% style="width:132px" %)(((
388 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
389 )))|(% style="width:54px" %)(((
390 Status & Ext
391 )))|(% style="width:64px" %)(((
392 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
393 )))
394
395 * **Battery status & Built-in Humidity**
396
397 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
398 |=(% 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]
399 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
400 BAT Status
401 00(b): Ultra Low ( BAT <= 2.50v)
402 01(b): Low  (2.50v <=BAT <= 2.55v)
403 10(b): OK   (2.55v <= BAT <=2.65v)
404 11(b): Good   (BAT >= 2.65v)
405 )))|(% style="width:132px" %)(((
406 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
407 )))
408
409 * **Status & Ext Byte**
410
411 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
412 |(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**Bits**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**7**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**[3:0]**
413 |(% 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)
414
415 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
416 * (% 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.
417 * (% 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)
418
419
420
421 ==== 2.4.6.3 Ext~=6, ADC Sensor(use with E2 Cable) ====
422
423
424 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
425
426 be used to power the external ADC sensor; user can control the power on time for this
427
428 (% style="color:blue" %)**sensor by setting:**
429
430 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
431
432 **For example:**
433
434 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
435
436
437 Or use **downlink command A2** to set the same.
438
439 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
440
441 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.
442
443 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
444
445
446 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
447
448 [[image:image-20220628150714-4.png||_mstalt="431054"]]
449
450
451 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.
452
453
454 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
455
456 [[image:image-20220628151005-5.png||_mstalt="429546"]]
457
458
459 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
460
461 [[image:image-20220628151056-6.png||_mstalt="431873"]]
462
463
464 3) Within range
465
466 [[image:image-20220628151143-7.png||_mstalt="431210"]]
467
468
469
470 ==== 2.4.6.4 Ext~=2 TMP117 Sensor((% style="display:none" %) (%%)Since Firmware v1.3)(% style="display:none" %) (%%) ====
471
472 [[image:image-20230717151328-8.png]]
473
474 (% style="display:none" %) (%%)
475
476
477
478 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
479
480 [[image:image-20220906102307-7.png||_mstalt="430443"]]
481
482
483 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**(% style="color: blue; display: none" %)** **
484
485 The external cable NE2 can be use for MOD4 and MOD8
486
487
488
489 ==== 2.4.6.5 Ext~=11 SHT31 Sensor ((% style="display:none" %) (%%)Since Firmware v1.4.1) ====
490
491
492
493 [[image:image-20230717151245-7.png]]
494
495 (% style="color:blue" %)**Ext=11,Temperature & Humidity Sensor(SHT31)：**
496
497 [[image:SHT31.png]]
498
499
500
501 ==== 2.4.6.6 Ext~=4 Interrupt Mode(Since Firmware v1.3) ====
502
503
504 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
505
506
507 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
508
509 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
510
511 In Open State, the power consumption is the same as if there is no probe
512
513 In Close state, the power consumption will be 3uA higher than normal.
514
515 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
516
517
518 Ext=4,Interrupt Sensor：
519
520 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:504px" %)
521 |(% style="width:101px" %)(((
522 **AT+EXT=4,1**
523 )))|(% style="width:395px" %)(((
524 **Sent uplink packet in both rising and falling interrupt**
525 )))
526 |(% style="width:101px" %)(((
527 **AT+EXT=4,2**
528 )))|(% style="width:395px" %)(((
529 **Sent uplink packet only in falling interrupt**
530 )))
531 |(% style="width:101px" %)(((
532 **AT+EXT=4,3**
533 )))|(% style="width:395px" %)(((
534 **Sent uplink packet only in rising interrupt**
535 )))
536
537 Trigger by falling edge:
538
539 [[image:image-20220906101145-2.png||_mstalt="428324"]]
540
541
542 Trigger by raising edge：
543
544 [[image:image-20220906101145-3.png||_mstalt="428688"]]
545
546
547
548 ==== 2.4.6.7 Ext~=8 Counting Mode(Since Firmware v1.3) ====
549
550
551 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
552
553
554 (% 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.
555
556 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
557
558
559 (% 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
560
561 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
562
563
564 Ext=8, Counting Sensor ( 4 bytes)：
565
566 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:330px" %)
567 |(% style="width:131px" %)(((
568 **AT+EXT=8,0**
569 )))|(% style="width:195px" %)(((
570 **Count at falling interrupt**
571 )))
572 |(% style="width:131px" %)(((
573 **AT+EXT=8,1**
574 )))|(% style="width:195px" %)(((
575 **Count at rising interrupt**
576 )))
577 |(% style="width:131px" %)(((
578 **AT+SETCNT=60**
579 )))|(% style="width:195px" %)(((
580 **Sent current count to 60**
581 )))
582
583 [[image:image-20220906101320-6.png||_mstalt="428064"]]
584
585
586 (% style="color:blue" %)**A2 downlink Command：**
587
588 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
589
590 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
591
592 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
593
594 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
595
596 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)
597
598
599 ==== 2.4.6.8 Ext~=10, E2 sensor (TMP117)with Unix Timestamp(Since firmware V1.3.2) ====
600
601
602 (((
603 Timestamp mode is designed for LHT65N with E2 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
604 )))
605
606 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
607 |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
608 **Size(bytes)**
609 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
610 **2**
611 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
612 **2**
613 )))|=(% style="width: 120px;background-color:#D9E2F3;color:#0070C0" %)(((
614 **2**
615 )))|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
616 **1**
617 )))|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)(((
618 **4**
619 )))
620 |(% style="width:110px" %)(((
621 **Value**
622 )))|(% style="width:71px" %)(((
623 External temperature
624 )))|(% style="width:99px" %)(((
625 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
626 )))|(% style="width:132px" %)(((
627 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
628 )))|(% style="width:54px" %)(((
629 Status & Ext
630 )))|(% style="width:64px" %)(((
631 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
632 )))
633
634 * **Battery status & Built-in Humidity**
635
636 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
637 |=(% 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]
638 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
639 BAT Status
640 00(b): Ultra Low ( BAT <= 2.50v)
641 01(b): Low  (2.50v <=BAT <= 2.55v)
642 10(b): OK   (2.55v <= BAT <=2.65v)
643 11(b): Good   (BAT >= 2.65v)
644 )))|(% style="width:132px" %)(((
645 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
646 )))
647
648 * **Status & Ext Byte**
649
650 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
651 |(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**Bits**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**7**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**[3:0]**
652 |(% 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)
653
654 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
655 * (% 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.
656 * (% 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)
657
658
659
660 == 2.5 Show data on Datacake ==
661
662
663 (((
664 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:
665 )))
666
667
668 (((
669 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
670 )))
671
672 (((
673 (% 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.
674 )))
675
676
677 (((
678 Add Datacake:
679 )))
680
681
682 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
683
684
685
686 Select default key as Access Key:
687
688
689 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
690
691
692 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
693
694
695 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
696
697
698 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
699
700
701 == 2.6 Datalog Feature ==
702
703
704 (((
705 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.
706 )))
707
708
709 === 2.6.1 Ways to get datalog via LoRaWAN ===
710
711
712 There are two methods:
713
714 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
715
716
717 (% 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.
718
719
720 (% style="color:red" %)**Note for method 2:**
721
722 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
723 * 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.
724
725 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
726
727
728 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
729
730
731 === 2.6.2 Unix TimeStamp ===
732
733
734 LHT65N uses Unix TimeStamp format based on
735
736
737 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
738
739
740
741 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
742
743 Below is the converter example
744
745 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
746
747
748 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
749
750
751 === 2.6.3 Set Device Time ===
752
753
754 (((
755 (% style="color:blue" %)**There are two ways to set device's time:**
756 )))
757
758 (((
759 **1.  Through LoRaWAN MAC Command (Default settings)**
760 )))
761
762 (((
763 User need to set SYNCMOD=1 to enable sync time via MAC command.
764 )))
765
766 (((
767 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).
768 )))
769
770 (((
771 (% 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.**
772 )))
773
774
775 (((
776 **2. Manually Set Time**
777 )))
778
779 (((
780 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
781 )))
782
783
784 === 2.6.4 Poll sensor value ===
785
786
787 User can poll sensor value based on timestamps from the server. Below is the downlink command.
788
789 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:428px" %)
790 |(% style="background-color:#d9e2f3; color:#0070c0; width:58px" %)**1byte**|(% style="background-color:#d9e2f3; color:#0070c0; width:128px" %)**4bytes**|(% style="background-color:#d9e2f3; color:#0070c0; width:123px" %)**4bytes**|(% style="background-color:#d9e2f3; color:#0070c0; width:116px" %)**1byte**
791 |(% style="width:58px" %)31|(% style="width:128px" %)Timestamp start|(% style="width:123px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
792
793 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.
794
795 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
796
797 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
798
799 Uplink Internal =5s, means LHT65N will send one packet every 5s. range 5~~255s.
800
801
802 === 2.6.5 Datalog Uplink payload ===
803
804
805 The Datalog poll reply uplink will use below payload format.
806
807 **Retrieval data payload:**
808
809 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
810 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
811 **Size(bytes)**
812 )))|=(% style="width: 90px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 90px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)**4**
813 |(% 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"]]
814
815 **Poll message flag & Ext:**
816
817 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
818
819 (% 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)
820
821 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
822
823 * Poll Message Flag is set to 1.
824
825 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
826
827 For example, in US915 band, the max payload for different DR is:
828
829 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
830
831 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
832
833 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
834
835 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
836
837 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
838
839
840 **Example:**
841
842 If LHT65N has below data inside Flash:
843
844 [[image:image-20230426171833-4.png]]
845
846
847 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
848
849 Where : Start time: 60065F97 = time 21/1/19 04:27:03
850
851 Stop time: 60066DA7= time 21/1/19 05:27:03
852
853
854 **LHT65N will uplink this payload.**
855
856 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
857
858
859 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
860
861 Where the first 11 bytes is for the first entry:
862
863 7FFF089801464160065F97
864
865 Ext sensor data=0x7FFF/100=327.67
866
867 Temp=0x088E/100=22.00
868
869 Hum=0x014B/10=32.6
870
871 poll message flag & Ext=0x41,means reply data,Ext=1
872
873 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
874
875
876 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
877
878
879 (((
880 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.
881 )))
882
883 (((
884 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
885
886
887 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
888
889
890 **Internal GXHT30 temperature alarm(Acquisition time: fixed at one minute)**
891
892 (((
893 (% class="box infomessage" %)
894 (((
895 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
896
897 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
898
899 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
900
901 (% _mstmutation="1" %)**AT+ARTEMP=? **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
902
903 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
904
905 **AT+LEDALARM=1** :       Enable LED visual Alarm.
906 )))
907 )))
908
909 (% style="color:#4f81bd" %)**Downlink Command:**
910
911 AT+WMOD=1:  A501  , AT+WMOD=0 :  A600
912
913 AT+CITEMP=1 : A60001
914
915 AT+ARTEMP=1,60  :  A70001003C
916
917 AT+ARTEMP=-16,60 :  A7FFF0003C
918
919 AT+LEDALARM=1  :  3601
920
921
922 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
923
924 Total bytes: 8 bytes
925
926 **Example: **AA0100010001003C
927
928 WMOD=01
929
930 CITEMP=0001
931
932 TEMPlow=0001
933
934 TEMPhigh=003C
935
936
937 **DS18B20 and TMP117 Threshold Alarm**
938
939 **~ AT+WMOD=1,60,-10,20**
940
941 (% style="color:#4f81bd" %)**Downlink Command:**
942
943 **Example: **A5013CFC180014
944
945 MOD=01
946
947 CITEMP=3C(S)
948
949 TEMPlow=FC18
950
951 TEMPhigh=0014
952
953
954 **Fluctuation alarm for DS18B20 and TMP117(Acquisition time: minimum 1s)**
955
956 **AT+WMOD=2,60,5** 
957
958 (% style="color:#4f81bd" %)**Downlink Command:**
959
960 **Example: **A5023C05
961
962 MOD=02
963
964 CITEMP=3C(S)
965
966 temperature fluctuation=05
967
968
969 **Sampling multiple times and uplink together**
970
971 **AT+WMOD=3,1,60,20,-16,32,1**   
972
973 Explain:
974
975 * (% style="color:#037691" %)**parameter1: **(%%)Set Working Mode to **Mode 3**
976 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
977 * (% style="color:#037691" %)**parameter3: **(%%)Sampling Interval is **60**s.
978 * (% 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)
979 * (% style="color:#037691" %)**parameter5 & parameter6: **(%%)Temperature alarm range is **-16** to **32**°C,
980 * (% 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.
981
982 (% style="color:#4f81bd" %)**Downlink Command:**
983
984 **Example: **A50301003C14FFF0002001
985
986 MOD=03
987
988 TEMP=DS18B20
989
990 CITEMP=003C(S)
991
992 Total number of acquisitions=14
993
994 TEMPlow=FFF0
995
996 TEMPhigh=0020
997
998 ARTEMP=01
999
1000
1001 **Uplink payload( Fport=3)**
1002
1003 **Example: CBEA**01**0992**//0A41//**09C4**
1004
1005 BatV=CBEA
1006
1007 TEMP=DS18B20
1008
1009 Temp1=0992  ~/~/ 24.50℃
1010
1011 Temp2=0A41  ~/~/ 26.25℃
1012
1013 Temp3=09C4  ~/~/ 25.00℃
1014
1015 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
1016
1017 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
1018 )))
1019
1020
1021 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
1022
1023
1024 (% class="box infomessage" %)
1025 (((
1026 (((
1027 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
1028 )))
1029
1030 (((
1031 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
1032 )))
1033
1034 (((
1035 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
1036 )))
1037
1038 (((
1039 (% _mstmutation="1" %)**AT+ARTEMP=? **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
1040 )))
1041
1042 (((
1043 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
1044 )))
1045 )))
1046
1047 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
1048
1049 Total bytes: 8 bytes
1050
1051 **Example:**AA0100010001003C
1052
1053 WMOD=01
1054
1055 CITEMP=0001
1056
1057 TEMPlow=0001
1058
1059 TEMPhigh=003C
1060
1061
1062 == 2.8 LED Indicator ==
1063
1064
1065 The LHT65 has a triple color LED which for easy showing different stage .
1066
1067 While user press ACT button, the LED will work as per LED status with ACT button.
1068
1069 In a normal working state:
1070
1071 * For each uplink, the BLUE LED or RED LED will blink once.
1072 BLUE LED when external sensor is connected.
1073 * RED LED when external sensor is not connected
1074 * For each success downlink, the PURPLE LED will blink once
1075
1076
1077
1078 == 2.9 installation ==
1079
1080
1081 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
1082
1083
1084 = 3. Sensors and Accessories =
1085
1086 == 3.1 E2 Extension Cable ==
1087
1088
1089 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
1090
1091
1092 **1m long breakout cable for LHT65N. Features:**
1093
1094 * (((
1095 Use for AT Command, works for both LHT52/LHT65N
1096 )))
1097 * (((
1098 Update firmware for LHT65N, works for both LHT52/LHT65N
1099 )))
1100 * (((
1101 Supports ADC mode to monitor external ADC
1102 )))
1103 * (((
1104 Supports Interrupt mode
1105 )))
1106 * (((
1107 Exposed All pins from the LHT65N Type-C connector.
1108
1109
1110
1111 )))
1112
1113 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1114
1115
1116 == 3.2 E3 Temperature Probe ==
1117
1118
1119 [[image:image-20220515080154-4.png||_mstalt="434681" alt="photo-20220515080154-4.png" height="182" width="161"]] [[image:image-20230717152413-11.png||height="207" width="192"]](% style="display:none" %)
1120
1121
1122 Temperature sensor with 2 meters cable long
1123
1124 * Resolution: 0.0625 °C
1125 * ±0.5°C accuracy from -10°C to +85°C
1126 * ±2°C accuracy from -55°C to +125°C
1127 * Operating Range: -40 ~~ 125 °C
1128 * Working voltage 2.35v ~~ 5v
1129
1130
1131 == 3.3 E31F Temperature Probe ==
1132
1133
1134 [[image:65N-E31F-1.jpg||height="169" width="170"]] [[image:image-20230717151424-9.png||height="221" width="204"]](% style="display:none" %)
1135
1136
1137 Temperature sensor with 1 meters cable long
1138
1139
1140 **Built-in Temperature Sensor:**
1141
1142 * Resolution: 0.01 °C
1143 * Accuracy Tolerance : Typ ±0.3 °C
1144 * Long Term Drift: < 0.02 °C/yr
1145 * Operating Range: -40 ~~ 80 °C
1146
1147 **Built-in Humidity Sensor:**
1148
1149 * Resolution: 0.04 % RH
1150 * Accuracy Tolerance : Typ ±3 % RH
1151 * Long Term Drift: < 0.02 °C/yr
1152 * Operating Range: 0 ~~ 96 % RH
1153
1154 **External Temperature Sensor :**
1155
1156 * Resolution: 0.01 °C
1157 * Accuracy Tolerance : Typical ±0.3 °C
1158 * Long Term Drift: < 0.02 °C/yr
1159 * Operating Range: -40 ~~ 125 °C
1160
1161 **External Humidity Sensor :**
1162
1163 * Resolution: 0.04 % RH
1164 * Accuracy Tolerance : Typ ±3 % RH
1165 * Long Term Drift: < 0.02 °C/yr
1166 * Operating Range: 0 ~~ 96 % RH
1167
1168
1169 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1170
1171
1172 (((
1173 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1174 )))
1175
1176 * (((
1177 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1178 )))
1179
1180 * (((
1181 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1182 )))
1183
1184 (((
1185 There are two kinds of commands to configure LHT65N, they are:
1186 )))
1187
1188 * (((
1189 (% style="color:#4f81bd" %)**General Commands**.
1190 )))
1191
1192 (((
1193 These commands are to configure:
1194 )))
1195
1196 1. (((
1197 General system settings like: uplink interval.
1198 )))
1199 1. (((
1200 LoRaWAN protocol & radio-related commands.
1201 )))
1202
1203 (((
1204 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]]
1205 )))
1206
1207 * (((
1208 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1209 )))
1210
1211 (((
1212 These commands are only valid for LHT65N, as below:
1213 )))
1214
1215
1216 == 4.1 Set Transmit Interval Time ==
1217
1218
1219 Feature: Change LoRaWAN End Node Transmit Interval.
1220
1221
1222 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1223
1224 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
1225 |(% 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**
1226 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)30000 OK the interval is 30000ms = 30s
1227 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)OK Set transmit interval to 60000ms = 60 seconds
1228
1229 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1230
1231 Format: Command Code (0x01) followed by 3 bytes time value.
1232
1233 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1234
1235 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1236
1237 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1238
1239
1240 == 4.2 Set External Sensor Mode ==
1241
1242
1243 Feature: Change External Sensor Mode.
1244
1245
1246 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1247
1248
1249 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:468px" %)
1250 |(% 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**
1251 |(% style="width:155px" %)AT+EXT=?|(% style="width:151px" %)Get current external sensor mode|(% style="width:158px" %)1 OK External Sensor mode =1
1252 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" rowspan="1" style="width:309px" %)Set external sensor mode to 1
1253 |(% style="width:155px" %)AT+EXT=9|(% colspan="2" rowspan="1" style="width:309px" %)Set to external DS18B20 with timestamp
1254
1255 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1256
1257 Total bytes: 2 ~~ 5 bytes
1258
1259 **Example:**
1260
1261 * 0xA201: Set external sensor type to E1
1262
1263 * 0xA209: Same as AT+EXT=9
1264
1265 * 0xA20702003c: Same as AT+SETCNT=60
1266
1267
1268 == 4.3 Enable/Disable uplink Temperature probe ID ==
1269
1270
1271 (((
1272 Feature: If PID is enabled, device will send the temperature probe ID on:
1273 )))
1274
1275 * (((
1276 First Packet after OTAA Join
1277 )))
1278 * (((
1279 Every 24 hours since the first packet.
1280 )))
1281
1282 (((
1283 PID is default set to disable (0)
1284
1285
1286 )))
1287
1288 (% style="color:#4f81bd" %)**AT Command:**
1289
1290 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:381px" %)
1291 |(% 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**
1292 |(% style="width:155px" %)AT+PID=1|(% style="width:136px" %)Enable PID uplink|(% style="width:86px" %)OK
1293
1294 (% style="color:#4f81bd" %)**Downlink Command:**
1295
1296 * **0xA800**  **~-~->** AT+PID=0
1297 * **0xA801**     **~-~->** AT+PID=1
1298
1299
1300 == 4.4 Set Password ==
1301
1302
1303 Feature: Set device password, max 9 digits
1304
1305 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1306
1307 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:372px" %)
1308 |(% 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**
1309 |(% style="width:155px" %)AT+PWORD=?|(% style="width:124px" %)Show password|(% style="width:86px" %)(((
1310 123456
1311
1312 OK
1313 )))
1314 |(% style="width:155px" %)AT+PWORD=999999|(% style="width:124px" %)Set password|(% style="width:86px" %)OK
1315
1316 (% style="color:#4f81bd" %)**Downlink Command:**
1317
1318 No downlink command for this feature.
1319
1320
1321 == 4.5 Quit AT Command ==
1322
1323
1324 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1325
1326 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1327
1328 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:433px" %)
1329 |(% 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**
1330 |(% style="width:155px" %)AT+DISAT|(% style="width:191px" %)Quit AT Commands mode|(% style="width:86px" %)OK
1331
1332 (% style="color:#4f81bd" %)**Downlink Command:**
1333
1334 No downlink command for this feature.
1335
1336
1337 == 4.6 Set to sleep mode ==
1338
1339
1340 Feature: Set device to sleep mode
1341
1342 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1343 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1344
1345 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1346
1347 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:513px" %)
1348 |(% 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**
1349 |(% style="width:155px" %)AT+SLEEP|(% style="width:139px" %)Set to sleep mode|(% style="width:213px" %)(((
1350 Clear all stored sensor data…
1351
1352 OK
1353 )))
1354
1355 (% style="color:#4f81bd" %)**Downlink Command:**
1356
1357 * There is no downlink command to set to Sleep mode.
1358
1359
1360 == 4.7 Set system time ==
1361
1362
1363 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1364
1365 (% style="color:#4f81bd" %)**AT Command:**
1366
1367 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:506px" %)
1368 |(% style="background-color:#d9e2f3; color:#0070c0; width:188px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:318px" %)**Function**
1369 |(% style="width:154px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
1370 OK
1371
1372 Set System time to 2021-01-20 00:59:12
1373 )))
1374
1375 (% style="color:#4f81bd" %)**Downlink Command:**
1376
1377 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1378
1379
1380 == 4.8 Set Time Sync Mode ==
1381
1382
1383 (((
1384 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1385 )))
1386
1387 (((
1388 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.
1389 )))
1390
1391 (% style="color:#4f81bd" %)**AT Command:**
1392
1393 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:475px" %)
1394 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:315px" %)**Function**
1395 |(% style="width:156px" %)AT+SYNCMOD=1|(% style="width:315px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
1396
1397 (% style="color:#4f81bd" %)**Downlink Command:**
1398
1399 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1400 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1401
1402
1403 == 4.9 Set Time Sync Interval ==
1404
1405
1406 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1407
1408 (% style="color:#4f81bd" %)**AT Command:**
1409
1410 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:472px" %)
1411 |(% style="background-color:#d9e2f3; color:#0070c0; width:158px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:314px" %)**Function**
1412 |(% style="width:156px" %)AT+SYNCTDC=0x0A |(% style="width:311px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
1413
1414 (% style="color:#4f81bd" %)**Downlink Command:**
1415
1416 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1417
1418
1419 == 4.10 Print data entries base on page. ==
1420
1421
1422 Feature: Print the sector data from start page to stop page (max is 416 pages).
1423
1424 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1425
1426 [[image:image-20230426164330-2.png]]
1427
1428 (% style="color:#4f81bd" %)**Downlink Command:**
1429
1430 No downlink commands for feature
1431
1432
1433 == 4.11 Print last few data entries. ==
1434
1435
1436 Feature: Print the last few data entries
1437
1438 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1439
1440 [[image:image-20230426164932-3.png]]
1441
1442 (% style="color:#4f81bd" %)**Downlink Command:**
1443
1444 No downlink commands for feature
1445
1446
1447 == 4.12 Clear Flash Record ==
1448
1449
1450 Feature: Clear flash storage for data log feature.
1451
1452 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1453
1454 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:503px" %)
1455 |(% 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**
1456 |(% style="width:155px" %)AT+CLRDTA |(% style="width:134px" %)Clear date record|(% style="width:209px" %)(((
1457 Clear all stored sensor data…
1458
1459 OK
1460 )))
1461
1462 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1463
1464 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1465
1466
1467 == 4.13 Auto Send None-ACK messages ==
1468
1469
1470 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.
1471
1472 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1473
1474 The default factory setting is 0
1475
1476 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:367px" %)
1477 |=(% 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**
1478 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1479
1480 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1481
1482 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1483
1484
1485 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm(Since firmware 1.3.0) ==
1486
1487
1488 Feature: Set internal and external temperature sensor alarms.
1489
1490 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
1491 |=(% 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**
1492 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1493
1494 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1495
1496 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1497
1498 0): Cancel
1499
1500 1): Threshold alarm
1501
1502 2): Fluctuation alarm
1503
1504
1505 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1506
1507 (% 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.**
1508
1509
1510 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1511
1512 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1513
1514 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1515
1516
1517 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.
1518
1519 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1520
1521 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1522
1523
1524 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1525
1526 0xA5 00 ~-~- AT+WMOD=0.
1527
1528 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 )
1529
1530 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))
1531
1532 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1533
1534 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.
1535
1536
1537 = 5. Battery & How to replace =
1538
1539 == 5.1 Battery Type ==
1540
1541
1542 (((
1543 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.
1544 )))
1545
1546 (((
1547 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1548
1549
1550 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1551 )))
1552
1553 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1554
1555
1556 == 5.2 Replace Battery ==
1557
1558
1559 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.
1560
1561 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1562
1563
1564 == 5.3 Battery Life Analyze ==
1565
1566
1567 (((
1568 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:
1569 [[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]]
1570 )))
1571
1572
1573 (((
1574 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]]
1575 )))
1576
1577
1578 = 6. FAQ =
1579
1580 == 6.1 How to use AT Command? ==
1581
1582
1583 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.
1584
1585 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1586
1587
1588 **Connection:**
1589
1590 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1591 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1592 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1593
1594 (((
1595 (% _mstmutation="1" style="color:red" %)**(Note: This pin only corresponds to the lead-out board sold by dragino company. For the lead-out board purchased by yourself, please refer to the pin description in Chapter 6.6)**
1596
1597 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.
1598 )))
1599
1600
1601 Input password and ATZ to activate LHT65N,As shown below:
1602
1603 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1604
1605
1606 AT Command List is as below:
1607
1608 AT+<CMD>? :  Help on <CMD>
1609
1610 AT+<CMD> :  Run <CMD>
1611
1612 AT+<CMD>=<value> :  Set the value
1613
1614 AT+<CMD>=? :  Get the value
1615
1616 AT+DEBUG:  Set more info output
1617
1618 ATZ:  Trig a reset of the MCU
1619
1620 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1621
1622 AT+DEUI:  Get or Set the Device EUI
1623
1624 AT+DADDR:  Get or Set the Device Address
1625
1626 AT+APPKEY:  Get or Set the Application Key
1627
1628 AT+NWKSKEY:  Get or Set the Network Session Key
1629
1630 AT+APPSKEY:  Get or Set the Application Session Key
1631
1632 AT+APPEUI:  Get or Set the Application EUI
1633
1634 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1635
1636 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1637
1638 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1639
1640 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1641
1642 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1643
1644 AT+RX2FQ:  Get or Set the Rx2 window frequency
1645
1646 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1647
1648 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1649
1650 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1651
1652 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1653
1654 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1655
1656 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1657
1658 AT+NWKID:  Get or Set the Network ID
1659
1660 AT+FCU:  Get or Set the Frame Counter Uplink
1661
1662 AT+FCD:  Get or Set the Frame Counter Downlink
1663
1664 AT+CLASS:  Get or Set the Device Class
1665
1666 AT+JOIN:  Join network
1667
1668 AT+NJS:  Get the join status
1669
1670 AT+SENDB:  Send hexadecimal data along with the application port
1671
1672 AT+SEND:  Send text data along with the application port
1673
1674 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1675
1676 AT+RECV:  Print last received data in raw format
1677
1678 AT+VER:  Get current image version and Frequency Band
1679
1680 AT+CFM:  Get or Set the confirmation mode (0-1)
1681
1682 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1683
1684 AT+SNR:  Get the SNR of the last received packet
1685
1686 AT+RSSI:  Get the RSSI of the last received packet
1687
1688 AT+TDC:  Get or set the application data transmission interval in ms
1689
1690 AT+PORT:  Get or set the application port
1691
1692 AT+DISAT:  Disable AT commands
1693
1694 AT+PWORD: Set password, max 9 digits
1695
1696 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1697
1698 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1699
1700 AT+PDTA:  Print the sector data from start page to stop page
1701
1702 AT+PLDTA:  Print the last few sets of data
1703
1704 AT+CLRDTA:  Clear the storage, record position back to 1st
1705
1706 AT+SLEEP:  Set sleep mode
1707
1708 AT+EXT:  Get or Set external sensor model
1709
1710 AT+BAT:  Get the current battery voltage in mV
1711
1712 AT+CFG:  Print all configurations
1713
1714 AT+WMOD:  Get or Set Work Mode
1715
1716 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1717
1718 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1719
1720 AT+SETCNT:  Set the count at present
1721
1722 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1723
1724 AT+RPL:  Get or set response level
1725
1726 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1727
1728 AT+LEAPSEC:  Get or Set Leap Second
1729
1730 AT+SYNCMOD:  Get or Set time synchronization method
1731
1732 AT+SYNCTDC:  Get or set time synchronization interval in day
1733
1734 AT+PID:  Get or set the PID
1735
1736
1737 == 6.2 Where to use AT commands and Downlink commands ==
1738
1739
1740 **AT commands: **
1741
1742 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1743
1744
1745 **Downlink commands:**
1746
1747
1748 (% style="color:blue" %)**TTN:**
1749
1750 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1751
1752
1753
1754 (% style="color:blue" %)**Helium: **
1755
1756 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1757
1758
1759
1760 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1761
1762
1763 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1764
1765
1766 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1767
1768
1769
1770 (% style="color:blue" %)**Aws:**
1771
1772 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1773
1774
1775 == 6.3 How to change the uplink interval? ==
1776
1777
1778 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);"]]
1779
1780
1781 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1782
1783
1784 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1785
1786 [[image:1655802313617-381.png||_mstalt="293917"]]
1787
1788
1789 (((
1790 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.
1791 )))
1792
1793
1794 Input password and ATZ to activate LHT65N, As shown below:
1795
1796 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1797
1798
1799 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1800
1801
1802 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1803
1804
1805 (% 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.
1806
1807 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1808
1809
1810
1811 (% _mstmutation="1" style="color:blue" %)**Step2**(%%): wiring method.(% style="display:none" %)
1812
1813 First connect the four lines;(% style="display:none" %)
1814
1815 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]],(% style="display:none" %)
1816
1817
1818 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1819
1820 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1821
1822
1823
1824 (% style="color:blue" %)**Step3: **(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1825
1826 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1827
1828
1829 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1830
1831
1832 When this interface appears, it indicates that the download has been completed.
1833
1834 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1835
1836
1837 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1838
1839
1840 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1841
1842
1843 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1844
1845
1846 **UART Port of LHT65N:**
1847
1848 * (% class="mark" %)**PB0: RXD**
1849 * (% class="mark" %)**PB1: TXD**
1850 * (% class="mark" %)**GND**
1851
1852 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1853
1854
1855 (((
1856 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.
1857 )))
1858
1859
1860 Input password and ATZ to activate LHT65N,As shown below:
1861
1862 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1863
1864
1865 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1866
1867
1868 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1869
1870
1871 (% 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.
1872
1873 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1874
1875
1876
1877 (% _mstmutation="1" style="color:blue" %)**Step2**(%%): wiring method.(% style="display:none" %)
1878
1879 First connect the four lines;
1880
1881 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1882
1883 Connect A8 and GND with Dupont wire for a while and then separate, enter reset mode
1884
1885
1886
1887 (% style="color:blue" %)**Step3: **(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1888
1889 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1890
1891
1892 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1893
1894
1895 When this interface appears, it indicates that the download has been completed.
1896
1897 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1898
1899
1900 Finally,Disconnect 3.3v, Connect A8 and GND with Dupont wire for a while and then separate, exit reset mode
1901
1902
1903 == 6.8 Why can't I see the datalog information ==
1904
1905
1906 ~1. The time is not aligned, and the correct query command is not used.
1907
1908 2. Decoder error, did not parse the datalog data, the data was filtered.
1909
1910
1911 = 7. Order Info =
1912
1913
1914 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1915
1916 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1917
1918 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1919 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1920 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1921 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1922 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1923 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1924 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1925 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1926
1927 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1928
1929 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1930
1931
1932 = 8. Packing Info =
1933
1934
1935 **Package Includes**:
1936
1937 * LHT65N Temperature & Humidity Sensor x 1
1938 * Optional external sensor
1939
1940 **Dimension and weight**:
1941
1942 * Device Size:  10 x 10 x 3.5 mm
1943 * Device Weight: 120.5g
1944
1945
1946 = 9. Reference material =
1947
1948
1949 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1950
1951
1952 = 10. FCC Warning =
1953
1954
1955 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1956
1957 (1) This device may not cause harmful interference;
1958
1959 (2) this device must accept any interference received, including interference that may cause undesired operation.