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Version 234.19 by Xiaoling on 2023/04/26 15:24
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
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6
7
8 **Table of Contents：**
9
10 {{toc/}}
11
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14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
23 )))
24
25 (((
26 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46 == 1.2 Features ==
47
48
49 * LoRaWAN v1.0.3 Class A protocol
50 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
51 * AT Commands to change parameters
52 * Remote configure parameters via LoRaWAN Downlink
53 * Firmware upgradeable via program port
54 * Built-in 2400mAh battery for up to 10 years of use.
55 * Built-in Temperature & Humidity sensor
56 * Optional External Sensors
57 * Tri-color LED to indicate working status
58 * Datalog feature (Max 3328 records)
59
60 == 1.3 Specification ==
61
62
63 (% style="color:#037691" %)**Built-in Temperature Sensor:**
64
65 * Resolution: 0.01 °C
66 * Accuracy Tolerance : Typ ±0.3 °C
67 * Long Term Drift: < 0.02 °C/yr
68 * Operating Range: -40 ~~ 85 °C
69
70 (% style="color:#037691" %)**Built-in Humidity Sensor:**
71
72 * Resolution: 0.04 %RH
73 * Accuracy Tolerance : Typ ±3 %RH
74 * Long Term Drift: < 0.02 °C/yr
75 * Operating Range: 0 ~~ 96 %RH
76
77 (% style="color:#037691" %)**External Temperature Sensor:**
78
79 * Resolution: 0.0625 °C
80 * ±0.5°C accuracy from -10°C to +85°C
81 * ±2°C accuracy from -55°C to +125°C
82 * Operating Range: -55 °C ~~ 125 °C
83
84 = 2. Connect LHT65N to IoT Server =
85
86 == 2.1 How does LHT65N work? ==
87
88
89 (((
90 LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
91 )))
92
93 (((
94 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
95 )))
96
97
98 == 2.2 How to Activate LHT65N? ==
99
100
101 (((
102 The LHT65N has two working modes:
103 )))
104
105 * (((
106 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
107 )))
108 * (((
109 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
110 )))
111
112 (((
113 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
114 )))
115
116
117 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
118
119 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
120 |=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)**Action**
121 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT between 1s < time < 3s|(% style="background-color:#f2f2f2; width:117px" %)Test uplink status|(% style="background-color:#f2f2f2; width:225px" %)(((
122 If LHT65N is already Joined to rhe LoRaWAN network, LHT65N will send an uplink packet, if LHT65N has external sensor connected,(% style="color:blue" %)**Blue led** (%%)will blink once. If LHT65N has not external sensor, (% style="color:red" %)**Red led**(%%) will blink once.
123 )))
124 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT for more than 3s|(% style="background-color:#f2f2f2; width:117px" %)Active Device|(% style="background-color:#f2f2f2; width:225px" %)(((
125 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, LHT65N will enter working mode and start to JOIN LoRaWAN network.
126 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after join in network.
127 )))
128 |(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means LHT65N is in Deep Sleep Mode.
129
130 == 2.3 Example to join LoRaWAN network ==
131
132
133 (% class="wikigeneratedid" %)
134 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
135
136
137 (% class="wikigeneratedid" %)
138 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
139
140
141 (((
142 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
143 )))
144
145
146 === 2.3.1 Step 1: Create Device n TTN ===
147
148
149 (((
150 Create a device in TTN V3 with the OTAA keys from LHT65N.
151 )))
152
153 (((
154 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
155 )))
156
157 [[image:image-20230426083319-1.png]]
158
159 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
160
161 Add APP EUI in the application.
162
163
164 [[image:image-20220522232916-3.png||_mstalt="430495"]]
165
166
167 [[image:image-20220522232932-4.png||_mstalt="430157"]]
168
169
170 [[image:image-20220522232954-5.png||_mstalt="431847"]]
171
172
173
174 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
175
176
177 [[image:image-20220522233026-6.png||_mstalt="429403"]]
178
179
180 Input APP EUI,  APP KEY and DEV EUI:
181
182
183 [[image:image-20220522233118-7.png||_mstalt="430430"]]
184
185
186 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
187
188
189 (((
190 Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
191 )))
192
193 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
194
195
196 == 2.4 Uplink Payload   ( Fport~=2) ==
197
198
199 (((
200 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
201 )))
202
203 (((
204 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
205 )))
206
207 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
208 |=(% style="width: 60px;background-color:#D9E2F3" %)(((
209 **Size(bytes)**
210 )))|=(% style="width: 30px;background-color:#D9E2F3" %)(((
211 **2**
212 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
213 **2**
214 )))|=(% style="width: 100px;background-color:#D9E2F3" %)(((
215 **2**
216 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
217 **1**
218 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
219 **4**
220 )))
221 |(% style="width:97px" %)(((
222 **Value**
223 )))|(% style="width:39px" %)(((
224 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
225 )))|(% style="width:100px" %)(((
226 (((
227 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
228 )))
229 )))|(% style="width:77px" %)(((
230 (((
231 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
232 )))
233 )))|(% style="width:47px" %)(((
234 [[Ext>>||anchor="H2.4.5Ext23"]] #
235 )))|(% style="width:51px" %)(((
236 [[Ext value>>||anchor="H2.4.6Extvalue"]]
237 )))
238
239 * The First 6 bytes: has fix meanings for every LHT65N.
240
241 * The 7th byte (EXT #): defines the external sensor model.
242
243 * The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won't be these four bytes.)
244
245 === 2.4.1 Decoder in TTN V3 ===
246
247
248 When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
249
250 Below is the position to put the decoder and LHT65N decoder can be download from here: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
251
252
253 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
254
255
256 === 2.4.2 BAT-Battery Info ===
257
258
259 These two bytes of BAT include the battery state and the actually voltage.
260
261 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:477px" %)
262 |=(% style="width: 69px; background-color:#D9E2F3;color:#0070C0" %)(((
263 **Bit(bit)**
264 )))|=(% style="width: 253px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)[13:0]
265 |(% style="width:66px" %)(((
266 **Value**
267 )))|(% style="width:250px" %)(((
268 BAT Status
269 00(b): Ultra Low ( BAT <= 2.50v)
270 01(b): Low (2.50v <=BAT <= 2.55v)
271 10(b): OK (2.55v <= BAT <=2.65v)
272 11(b): Good (BAT >= 2.65v)
273 )))|(% style="width:152px" %)Actually BAT voltage
274
275 **(b)stands for binary**
276
277
278 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
279
280
281 Check the battery voltage for LHT65N.
282
283 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
284
285 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
286
287 === 2.4.3 Built-in Temperature ===
288
289
290 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
291
292 * Temperature:  0x0ABB/100=27.47℃
293
294 [[image:image-20220522235639-3.png||_mstalt="432120"]]
295
296 * Temperature:  (0xF5C6-65536)/100=-26.18℃
297
298 === 2.4.4 Built-in Humidity ===
299
300
301 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
302
303 * Humidity:    0x025C/10=60.4%
304
305 === 2.4.5 Ext # ===
306
307
308 Bytes for External Sensor:
309
310 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:425px" %)
311 |=(% style="width: 102px; background-color:#D9E2F3;color:#0070C0" %)**EXT # Value**|=(% style="width: 323px;background-color:#D9E2F3;color:#0070C0" %)**External Sensor Type**
312 |(% style="width:102px" %)0x01|(% style="width:319px" %)Sensor E3, Temperature Sensor
313 |(% style="width:102px" %)0x09|(% style="width:319px" %)Sensor E3, Temperature Sensor, Datalog Mod
314
315 === 2.4.6 Ext value ===
316
317 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
318
319
320 [[image:image-20220522235639-5.png||_mstalt="432848"]]
321
322
323 * DS18B20 temp=0x0ADD/100=27.81℃
324
325 The last 2 bytes of data are meaningless
326
327
328
329 [[image:image-20220522235639-6.png||_mstalt="433212"]]
330
331
332 * External temperature= (0xF54F-65536)/100=-27.37℃
333
334 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
335
336 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
337
338 The last 2 bytes of data are meaningless
339
340 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
341
342
343
344 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
345
346
347 (((
348 Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
349 )))
350
351
352 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %)
353 |=(% style="width: 50px;background-color:#D9E2F3" %)(((
354 **Size(bytes)**
355 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
356 **2**
357 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
358 **2**
359 )))|=(% style="width: 120px;background-color:#D9E2F3" %)(((
360 **2**
361 )))|=(% style="width: 50px;background-color:#D9E2F3" %)(((
362 **1**
363 )))|=(% style="width: 70px;background-color:#D9E2F3" %)(((
364 **4**
365 )))
366 |(% style="width:110px" %)(((
367 **Value**
368 )))|(% style="width:71px" %)(((
369 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
370 )))|(% style="width:99px" %)(((
371 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
372 )))|(% style="width:132px" %)(((
373 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
374 )))|(% style="width:54px" %)(((
375 Status & Ext
376 )))|(% style="width:64px" %)(((
377 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
378 )))
379
380 * **Battery status & Built-in Humidity**
381
382 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:461px" %)
383 |=(% style="width: 69px;background-color:#D9E2F3;color:#0070C0" %)Bit(bit)|=(% style="width: 258px;background-color:#D9E2F3;color:#0070C0" %)[15:14]|=(% style="width: 134px;background-color:#D9E2F3;color:#0070C0" %)[11:0]
384 |(% style="width:67px" %)**Value**|(% style="width:256px" %)(((
385 BAT Status
386 00(b): Ultra Low ( BAT <= 2.50v)
387 01(b): Low  (2.50v <=BAT <= 2.55v)
388 10(b): OK   (2.55v <= BAT <=2.65v)
389 11(b): Good   (BAT >= 2.65v)
390 )))|(% style="width:132px" %)(((
391 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
392 )))
393
394 * **Status & Ext Byte**
395
396 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
397 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)**Bits**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**7**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**[3:0]**
398 |=(% style="width: 96px;" %)**Status&Ext**|(% style="width:124px" %)None-ACK Flag|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
399
400 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
401 * (% style="color:blue" %)**Sync time OK**: (%%) 1: Set time ok，0: N/A. After time SYNC request is sent, LHT65N will set this bit to 0 until got the time stamp from the application server.
402 * (% style="color:blue" %)**Unix Time Request**:(%%)  1: Request server downlink Unix time, 0 : N/A. In this mode, LHT65N will set this bit to 1 every 10 days to request a time SYNC. (AT+SYNCMOD to set this)
403
404 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
405
406
407 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
408
409 be used to power the external ADC sensor; user can control the power on time for this
410
411 (% style="color:blue" %)**sensor by setting:**
412
413 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
414
415 **For example:**
416
417 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
418
419
420 Or use **downlink command A2** to set the same.
421
422 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
423
424 When the measured output voltage of the sensor is not within the range of 0.1V and 1.1V, the output voltage terminal of the sensor shall be divided The example in the following figure is to reduce the output voltage of the sensor by three times If it is necessary to reduce more times, calculate according to the formula in the figure and connect the corresponding resistance in series.
425
426 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
427
428
429 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
430
431 [[image:image-20220628150714-4.png||_mstalt="431054"]]
432
433
434 When the voltage collected by ADC_IN1 is less than the minimum range, the minimum range will be used as the output; Similarly, when the collected voltage is greater than the maximum range, the maximum range will be used as the output.
435
436
437 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
438
439 [[image:image-20220628151005-5.png||_mstalt="429546"]]
440
441
442 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
443
444 [[image:image-20220628151056-6.png||_mstalt="431873"]]
445
446
447 3) Within range
448
449 [[image:image-20220628151143-7.png||_mstalt="431210"]]
450
451
452
453 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
454
455
456 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
457
458
459 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
460
461 [[image:image-20220906102307-7.png||_mstalt="430443"]]
462
463
464 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
465
466 The external cable NE2 can be use for MOD4 and MOD8
467
468
469
470 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
471
472
473 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
474
475
476 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
477
478 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
479
480 In Open State, the power consumption is the same as if there is no probe
481
482 In Close state, the power consumption will be 3uA higher than normal.
483
484 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
485
486
487 Ext=4,Interrupt Sensor：
488
489 (% border="1.5" cellspacing="4" style="background-color:#f2f2f2; height:6px; width:478px" %)
490 |(% style="width:101px" %)(((
491 AT+EXT=4,1
492 )))|(% style="width:373px" %)(((
493 Sent uplink packet in both rising and falling interrupt
494 )))
495 |(% style="width:101px" %)(((
496 AT+EXT=4,2
497 )))|(% style="width:373px" %)(((
498 Sent uplink packet only in falling interrupt
499 )))
500 |(% style="width:101px" %)(((
501 AT+EXT=4,3
502 )))|(% style="width:373px" %)(((
503 Sent uplink packet only in rising interrupt
504 )))
505
506 Trigger by falling edge:
507
508 [[image:image-20220906101145-2.png||_mstalt="428324"]]
509
510
511 Trigger by raising edge：
512
513 [[image:image-20220906101145-3.png||_mstalt="428688"]]
514
515
516
517 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
518
519
520 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
521
522
523 (% style="color:blue" %)**Case 1**(%%):  Low power consumption Flow Sensor, such flow sensor has pulse output and the power consumption in uA level and can be powered by LHT65N.
524
525 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
526
527
528 (% style="color:blue" %)**Case 2**(%%):  Normal Flow Sensor: Such flow sensor has higher power consumption and is not suitable to be powered by LHT65N. It is powered by external power and output <3.3v pulse
529
530 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
531
532
533 Ext=8, Counting Sensor ( 4 bytes)：
534
535 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
536 |(% style="width:138px" %)(((
537 AT+EXT=8,0
538 )))|(% style="width:240px" %)(((
539 Count at falling interrupt
540 )))
541 |(% style="width:138px" %)(((
542 AT+EXT=8,1
543 )))|(% style="width:240px" %)(((
544 Count at rising interrupt
545 )))
546 |(% style="width:138px" %)(((
547 AT+SETCNT=60
548 )))|(% style="width:240px" %)(((
549 Sent current count to 60
550 )))
551
552 [[image:image-20220906101320-6.png||_mstalt="428064"]]
553
554
555 (% style="color:blue" %)**A2 downlink Command：**
556
557 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
558
559 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
560
561 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
562
563 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
564
565 A2 08 02 00 00 00 3C:  Same as AT+ SETCNT=60  (AT+ SETCNT = 4th byte and 5th byte and 6th byte and 7th byte)
566
567
568 == 2.5 Show data on Datacake ==
569
570
571 (((
572 Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
573 )))
574
575 (((
576
577 )))
578
579 (((
580 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
581 )))
582
583 (((
584 (% 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.
585 )))
586
587 (((
588
589 )))
590
591 (((
592 Add Datacake:
593 )))
594
595
596 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
597
598
599
600 Select default key as Access Key:
601
602
603 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
604
605
606 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
607
608
609 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
610
611
612 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
613
614
615 == 2.6 Datalog Feature ==
616
617
618 (((
619 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.
620 )))
621
622
623 === 2.6.1 Ways to get datalog via LoRaWAN ===
624
625
626 There are two methods:
627
628 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
629
630
631 (% 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.
632
633
634 (% style="color:red" %)**Note for method 2:**
635
636 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
637 * 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.
638
639 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
640
641
642 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
643
644
645 === 2.6.2 Unix TimeStamp ===
646
647
648 LHT65N uses Unix TimeStamp format based on
649
650
651 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
652
653
654
655 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
656
657 Below is the converter example
658
659 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
660
661
662 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
663
664
665 === 2.6.3 Set Device Time ===
666
667
668 (((
669 (% style="color:blue" %)**There are two ways to set device's time:**
670 )))
671
672 (((
673 **1.  Through LoRaWAN MAC Command (Default settings)**
674 )))
675
676 (((
677 User need to set SYNCMOD=1 to enable sync time via MAC command.
678 )))
679
680 (((
681 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).
682 )))
683
684 (((
685 (% 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.**
686 )))
687
688
689 (((
690 **2. Manually Set Time**
691 )))
692
693 (((
694 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
695 )))
696
697
698 === 2.6.4 Poll sensor value ===
699
700
701 User can poll sensor value based on timestamps from the server. Below is the downlink command.
702
703 [[image:image-20220523152302-15.png||_mstalt="451581"]]
704
705
706 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.
707
708 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
709
710 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
711
712 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
713
714
715 === 2.6.5 Datalog Uplink payload ===
716
717
718 The Datalog poll reply uplink will use below payload format.
719
720 **Retrieval data payload:**
721
722 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
723 |=(% style="width: 60px;" %)(((
724 **Size(bytes)**
725 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
726 |(% 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"]]
727
728 **Poll message flag & Ext:**
729
730 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
731
732 (% 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)
733
734 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
735
736 * Poll Message Flag is set to 1.
737
738 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
739
740 For example, in US915 band, the max payload for different DR is:
741
742 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
743
744 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
745
746 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
747
748 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
749
750 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
751
752
753 **Example:**
754
755 If LHT65N has below data inside Flash:
756
757 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
758
759
760 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
761
762 Where : Start time: 60065F97 = time 21/1/19 04:27:03
763
764 Stop time: 60066DA7= time 21/1/19 05:27:03
765
766
767 **LHT65N will uplink this payload.**
768
769 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
770
771
772 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
773
774 Where the first 11 bytes is for the first entry:
775
776 7FFF089801464160065F97
777
778 Ext sensor data=0x7FFF/100=327.67
779
780 Temp=0x088E/100=22.00
781
782 Hum=0x014B/10=32.6
783
784 poll message flag & Ext=0x41,means reply data,Ext=1
785
786 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
787
788
789 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
790
791
792 (((
793 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.
794 )))
795
796 (((
797 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
798
799
800 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
801
802
803 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
804
805 (((
806 (% class="box infomessage" %)
807 (((
808 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
809
810 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
811
812 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
813
814 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
815
816 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
817
818 **AT+LEDALARM=1** :       Enable LED visual Alarm.
819 )))
820 )))
821
822 (% style="color:#4f81bd" %)**Downlink Command:**
823
824 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
825
826 AT+CITEMP=1 : A60001
827
828 AT+ARTEMP=1,60  :  A70001003C
829
830 AT+ARTEMP=-16,60 :  A7FFF0003C
831
832 AT+LEDALARM=1  :  3601
833
834
835 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
836
837 Total bytes: 8 bytes
838
839 **Example: **AA0100010001003C
840
841 WMOD=01
842
843 CITEMP=0001
844
845 TEMPlow=0001
846
847 TEMPhigh=003C
848
849
850 **DS18B20 and TMP117 Threshold Alarm**
851
852 **~ AT+WMOD=1,60,-10,20**
853
854 (% style="color:#4f81bd" %)**Downlink Command:**
855
856 **Example: **A5013CFC180014
857
858 MOD=01
859
860 CITEMP=3C(S)
861
862 TEMPlow=FC18
863
864 TEMPhigh=0014
865
866
867 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
868
869 **AT+WMOD=2,60,5** 
870
871 (% style="color:#4f81bd" %)**Downlink Command:**
872
873 **Example: **A5023C05
874
875 MOD=02
876
877 CITEMP=3C(S)
878
879 temperature fluctuation=05
880
881
882 **Sampling multiple times and uplink together**
883
884 **AT+WMOD=3,1,60,20,-16,32,1**   
885
886 Explain:
887
888 * (% style="color:#037691" %)**parameter1:**(%%)Set Working Mode to **Mode 3**
889 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
890 * (% style="color:#037691" %)**parameter3:**(%%)Sampling Interval is **60**s.
891 * (% 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)
892 * (% style="color:#037691" %)**parameter5 & parameter6:**(%%)Temperature alarm range is **-16** to **32**°C,
893 * (% 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.
894
895 (% style="color:#4f81bd" %)**Downlink Command:**
896
897 **Example: **A50301003C14FFF0002001
898
899 MOD=03
900
901 TEMP=DS18B20
902
903 CITEMP=003C(S)
904
905 Total number of acquisitions=14
906
907 TEMPlow=FFF0
908
909 TEMPhigh=0020
910
911 ARTEMP=01
912
913 **Uplink payload( Fport=3)**
914
915 **Example: CBEA**01**0992**//0A41//**09C4**
916
917 BatV=CBEA
918
919 TEMP=DS18B20
920
921 Temp1=0992  ~/~/ 24.50℃
922
923 Temp2=0A41  ~/~/ 26.25℃
924
925 Temp3=09C4  ~/~/ 25.00℃
926
927 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
928
929 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
930 )))
931
932
933 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
934
935
936 (% class="box infomessage" %)
937 (((
938 (((
939 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
940 )))
941
942 (((
943 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
944 )))
945
946 (((
947 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
948 )))
949
950 (((
951 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
952 )))
953
954 (((
955 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
956 )))
957 )))
958
959 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
960
961 Total bytes: 8 bytes
962
963 **Example:**AA0100010001003C
964
965 WMOD=01
966
967 CITEMP=0001
968
969 TEMPlow=0001
970
971 TEMPhigh=003C
972
973
974 == 2.8 LED Indicator ==
975
976
977 The LHT65 has a triple color LED which for easy showing different stage .
978
979 While user press ACT button, the LED will work as per LED status with ACT button.
980
981 In a normal working state:
982
983 * For each uplink, the BLUE LED or RED LED will blink once.
984 BLUE LED when external sensor is connected.
985 * RED LED when external sensor is not connected
986 * For each success downlink, the PURPLE LED will blink once
987
988 == 2.9 installation ==
989
990
991 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
992
993
994 = 3. Sensors and Accessories =
995
996 == 3.1 E2 Extension Cable ==
997
998
999 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
1000
1001
1002 **1m long breakout cable for LHT65N. Features:**
1003
1004 * (((
1005 Use for AT Command， works for both LHT52/LHT65N
1006 )))
1007 * (((
1008 Update firmware for LHT65N, works for both LHT52/LHT65N
1009 )))
1010 * (((
1011 Supports ADC mode to monitor external ADC
1012 )))
1013 * (((
1014 Supports Interrupt mode
1015 )))
1016 * (((
1017 Exposed All pins from the LHT65N Type-C connector.
1018
1019
1020
1021 )))
1022
1023 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1024
1025
1026 == 3.2 E3 Temperature Probe ==
1027
1028
1029 [[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"]]
1030
1031
1032 Temperature sensor with 2 meters cable long
1033
1034 * Resolution: 0.0625 °C
1035 * ±0.5°C accuracy from -10°C to +85°C
1036 * ±2°C accuracy from -55°C to +125°C
1037 * Operating Range: -40 ~~ 125 °C
1038 * Working voltage 2.35v ~~ 5v
1039
1040 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1041
1042
1043 (((
1044 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1045 )))
1046
1047 * (((
1048 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1049 )))
1050
1051 * (((
1052 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1053 )))
1054
1055 (((
1056 There are two kinds of commands to configure LHT65N, they are:
1057 )))
1058
1059 * (((
1060 (% style="color:#4f81bd" %)**General Commands**.
1061 )))
1062
1063 (((
1064 These commands are to configure:
1065 )))
1066
1067 1. (((
1068 General system settings like: uplink interval.
1069 )))
1070 1. (((
1071 LoRaWAN protocol & radio-related commands.
1072 )))
1073
1074 (((
1075 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]]
1076 )))
1077
1078 * (((
1079 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1080 )))
1081
1082 (((
1083 These commands are only valid for LHT65N, as below:
1084 )))
1085
1086
1087 == 4.1 Set Transmit Interval Time ==
1088
1089
1090 Feature: Change LoRaWAN End Node Transmit Interval.
1091
1092
1093 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1094
1095 [[image:image-20220523150701-2.png||_mstalt="427453"]]
1096
1097
1098 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1099
1100 Format: Command Code (0x01) followed by 3 bytes time value.
1101
1102 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1103
1104 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1105
1106 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1107
1108 == 4.2 Set External Sensor Mode ==
1109
1110
1111 Feature: Change External Sensor Mode.
1112
1113
1114 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1115
1116 [[image:image-20220523150759-3.png||_mstalt="432146"]]
1117
1118
1119 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1120
1121 Total bytes: 2 ~~ 5 bytes
1122
1123 **Example:**
1124
1125 * 0xA201: Set external sensor type to E1
1126
1127 * 0xA209: Same as AT+EXT=9
1128
1129 * 0xA20702003c: Same as AT+SETCNT=60
1130
1131 == 4.3 Enable/Disable uplink Temperature probe ID ==
1132
1133
1134 (((
1135 Feature: If PID is enabled, device will send the temperature probe ID on:
1136 )))
1137
1138 * (((
1139 First Packet after OTAA Join
1140 )))
1141 * (((
1142 Every 24 hours since the first packet.
1143 )))
1144
1145 (((
1146 PID is default set to disable (0)
1147
1148
1149 )))
1150
1151 (% style="color:#4f81bd" %)**AT Command:**
1152
1153 [[image:image-20220523150928-4.png||_mstalt="431821"]]
1154
1155
1156 (% style="color:#4f81bd" %)**Downlink Command:**
1157
1158 * **0xA800**  **~-~->** AT+PID=0
1159 * **0xA801**     **~-~->** AT+PID=1
1160
1161 == 4.4 Set Password ==
1162
1163
1164 Feature: Set device password, max 9 digits
1165
1166
1167 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1168
1169 [[image:image-20220523151052-5.png||_mstalt="428623"]]
1170
1171
1172 (% style="color:#4f81bd" %)**Downlink Command:**
1173
1174 No downlink command for this feature.
1175
1176
1177 == 4.5 Quit AT Command ==
1178
1179
1180 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1181
1182
1183 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1184
1185 [[image:image-20220523151132-6.png||_mstalt="428649"]]
1186
1187
1188 (% style="color:#4f81bd" %)**Downlink Command:**
1189
1190 No downlink command for this feature.
1191
1192
1193 == 4.6 Set to sleep mode ==
1194
1195
1196 Feature: Set device to sleep mode
1197
1198 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1199 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1200
1201 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1202
1203 [[image:image-20220523151218-7.png||_mstalt="430703"]]
1204
1205
1206 (% style="color:#4f81bd" %)**Downlink Command:**
1207
1208 * There is no downlink command to set to Sleep mode.
1209
1210 == 4.7 Set system time ==
1211
1212
1213 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1214
1215
1216 (% style="color:#4f81bd" %)**AT Command:**
1217
1218 [[image:image-20220523151253-8.png||_mstalt="430677"]]
1219
1220
1221 (% style="color:#4f81bd" %)**Downlink Command:**
1222
1223 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1224
1225
1226 == 4.8 Set Time Sync Mode ==
1227
1228
1229 (((
1230 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1231 )))
1232
1233 (((
1234 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.
1235
1236
1237 )))
1238
1239 (% style="color:#4f81bd" %)**AT Command:**
1240
1241 [[image:image-20220523151336-9.png||_mstalt="431717"]]
1242
1243
1244 (% style="color:#4f81bd" %)**Downlink Command:**
1245
1246 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1247 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1248
1249
1250 == 4.9 Set Time Sync Interval ==
1251
1252
1253 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1254
1255
1256 (% style="color:#4f81bd" %)**AT Command:**
1257
1258 [[image:image-20220523151411-10.png||_mstalt="449696"]]
1259
1260
1261 (% style="color:#4f81bd" %)**Downlink Command:**
1262
1263 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1264
1265
1266 == 4.10 Print data entries base on page. ==
1267
1268
1269 Feature: Print the sector data from start page to stop page (max is 416 pages).
1270
1271
1272 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1273
1274 [[image:image-20220523151450-11.png||_mstalt="451035"]]
1275
1276
1277 (% style="color:#4f81bd" %)**Downlink Command:**
1278
1279 No downlink commands for feature
1280
1281
1282 == 4.11 Print last few data entries. ==
1283
1284
1285 Feature: Print the last few data entries
1286
1287
1288 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1289
1290 [[image:image-20220523151524-12.png||_mstalt="452101"]]
1291
1292
1293 (% style="color:#4f81bd" %)**Downlink Command:**
1294
1295 No downlink commands for feature
1296
1297
1298 == 4.12 Clear Flash Record ==
1299
1300
1301 Feature: Clear flash storage for data log feature.
1302
1303
1304 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1305
1306 [[image:image-20220523151556-13.png||_mstalt="454129"]]
1307
1308
1309 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1310
1311 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1312
1313 == 4.13 Auto Send None-ACK messages ==
1314
1315
1316 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.
1317
1318
1319 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1320
1321 The default factory setting is 0
1322
1323 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1324 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1325 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1326
1327 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1328
1329 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1330
1331 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1332
1333
1334 Feature: Set internal and external temperature sensor alarms.
1335
1336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1337 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1338 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1339
1340 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1341
1342 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1343
1344 0): Cancel
1345
1346 1): Threshold alarm
1347
1348 2): Fluctuation alarm
1349
1350
1351 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1352
1353 (% 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.**
1354
1355
1356 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1357
1358 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1359
1360 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1361
1362
1363 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.
1364
1365 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1366
1367 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1368
1369
1370 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1371
1372 0xA5 00 ~-~- AT+WMOD=0.
1373
1374 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 )
1375
1376 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))
1377
1378 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1379
1380 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.
1381
1382
1383 = 5. Battery & How to replace =
1384
1385 == 5.1 Battery Type ==
1386
1387
1388 (((
1389 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.
1390 )))
1391
1392 (((
1393 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1394
1395
1396 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1397 )))
1398
1399 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1400
1401
1402 == 5.2 Replace Battery ==
1403
1404
1405 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.
1406
1407 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1408
1409
1410 == 5.3 Battery Life Analyze ==
1411
1412
1413 (((
1414 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:
1415 [[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]]
1416 )))
1417
1418
1419 (((
1420 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]]
1421 )))
1422
1423
1424 = 6. FAQ =
1425
1426 == 6.1 How to use AT Command? ==
1427
1428
1429 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.
1430
1431 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1432
1433
1434 **Connection:**
1435
1436 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1437 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1438 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1439
1440 (((
1441 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.
1442 )))
1443
1444
1445 Input password and ATZ to activate LHT65N,As shown below:
1446
1447 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1448
1449
1450 AT Command List is as below:
1451
1452 AT+<CMD>? :  Help on <CMD>
1453
1454 AT+<CMD> :  Run <CMD>
1455
1456 AT+<CMD>=<value> :  Set the value
1457
1458 AT+<CMD>=? :  Get the value
1459
1460 AT+DEBUG:  Set more info output
1461
1462 ATZ:  Trig a reset of the MCU
1463
1464 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1465
1466 AT+DEUI:  Get or Set the Device EUI
1467
1468 AT+DADDR:  Get or Set the Device Address
1469
1470 AT+APPKEY:  Get or Set the Application Key
1471
1472 AT+NWKSKEY:  Get or Set the Network Session Key
1473
1474 AT+APPSKEY:  Get or Set the Application Session Key
1475
1476 AT+APPEUI:  Get or Set the Application EUI
1477
1478 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1479
1480 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1481
1482 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1483
1484 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1485
1486 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1487
1488 AT+RX2FQ:  Get or Set the Rx2 window frequency
1489
1490 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1491
1492 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1493
1494 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1495
1496 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1497
1498 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1499
1500 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1501
1502 AT+NWKID:  Get or Set the Network ID
1503
1504 AT+FCU:  Get or Set the Frame Counter Uplink
1505
1506 AT+FCD:  Get or Set the Frame Counter Downlink
1507
1508 AT+CLASS:  Get or Set the Device Class
1509
1510 AT+JOIN:  Join network
1511
1512 AT+NJS:  Get the join status
1513
1514 AT+SENDB:  Send hexadecimal data along with the application port
1515
1516 AT+SEND:  Send text data along with the application port
1517
1518 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1519
1520 AT+RECV:  Print last received data in raw format
1521
1522 AT+VER:  Get current image version and Frequency Band
1523
1524 AT+CFM:  Get or Set the confirmation mode (0-1)
1525
1526 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1527
1528 AT+SNR:  Get the SNR of the last received packet
1529
1530 AT+RSSI:  Get the RSSI of the last received packet
1531
1532 AT+TDC:  Get or set the application data transmission interval in ms
1533
1534 AT+PORT:  Get or set the application port
1535
1536 AT+DISAT:  Disable AT commands
1537
1538 AT+PWORD: Set password, max 9 digits
1539
1540 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1541
1542 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1543
1544 AT+PDTA:  Print the sector data from start page to stop page
1545
1546 AT+PLDTA:  Print the last few sets of data
1547
1548 AT+CLRDTA:  Clear the storage, record position back to 1st
1549
1550 AT+SLEEP:  Set sleep mode
1551
1552 AT+EXT:  Get or Set external sensor model
1553
1554 AT+BAT:  Get the current battery voltage in mV
1555
1556 AT+CFG:  Print all configurations
1557
1558 AT+WMOD:  Get or Set Work Mode
1559
1560 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1561
1562 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1563
1564 AT+SETCNT:  Set the count at present
1565
1566 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1567
1568 AT+RPL:  Get or set response level
1569
1570 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1571
1572 AT+LEAPSEC:  Get or Set Leap Second
1573
1574 AT+SYNCMOD:  Get or Set time synchronization method
1575
1576 AT+SYNCTDC:  Get or set time synchronization interval in day
1577
1578 AT+PID:  Get or set the PID
1579
1580
1581 == 6.2 Where to use AT commands and Downlink commands ==
1582
1583
1584 **AT commands：**
1585
1586 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1587
1588
1589 **Downlink commands:**
1590
1591
1592 (% style="color:blue" %)**TTN:**
1593
1594 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1595
1596
1597
1598 (% style="color:blue" %)**Helium：**
1599
1600 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1601
1602
1603
1604 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1605
1606
1607 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1608
1609
1610 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1611
1612
1613
1614 (% style="color:blue" %)**Aws:**
1615
1616 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1617
1618
1619 == 6.3 How to change the uplink interval？ ==
1620
1621
1622 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);"]]
1623
1624
1625 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1626
1627
1628 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1629
1630 [[image:1655802313617-381.png||_mstalt="293917"]]
1631
1632
1633 (((
1634 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.
1635 )))
1636
1637
1638 Input password and ATZ to activate LHT65N,As shown below:
1639
1640 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1641
1642
1643 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1644
1645
1646 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1647
1648
1649 (% 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.
1650
1651 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1652
1653
1654
1655 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1656
1657 First connect the four lines；(% style="display:none" %)
1658
1659 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1660
1661
1662 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1663
1664 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1665
1666
1667
1668 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1669
1670 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1671
1672
1673 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1674
1675
1676 When this interface appears, it indicates that the download has been completed.
1677
1678 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1679
1680
1681 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1682
1683
1684 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1685
1686
1687 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1688
1689
1690 **UART Port of LHT65N:**
1691
1692 * (% class="mark" %)**PB0: RXD**
1693 * (% class="mark" %)**PB1: TXD**
1694 * (% class="mark" %)**GND**
1695
1696 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1697
1698
1699 (((
1700 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.
1701 )))
1702
1703
1704 Input password and ATZ to activate LHT65N,As shown below:
1705
1706 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1707
1708
1709 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1710
1711
1712 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1713
1714
1715 (% 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.
1716
1717 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1718
1719
1720
1721 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1722
1723 First connect the four lines；
1724
1725 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1726
1727 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1728
1729
1730
1731 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1732
1733 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1734
1735
1736 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1737
1738
1739 When this interface appears, it indicates that the download has been completed.
1740
1741 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1742
1743
1744 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1745
1746
1747 == 6.8 Why can't I see the datalog information ==
1748
1749
1750 ~1. The time is not aligned, and the correct query command is not used.
1751
1752 2. Decoder error, did not parse the datalog data, the data was filtered.
1753
1754
1755 = 7. Order Info =
1756
1757
1758 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1759
1760 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1761
1762 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1763 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1764 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1765 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1766 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1767 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1768 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1769 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1770
1771 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1772
1773 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1774
1775 = 8. Packing Info =
1776
1777
1778 **Package Includes**:
1779
1780 * LHT65N Temperature & Humidity Sensor x 1
1781 * Optional external sensor
1782
1783 **Dimension and weight**:
1784
1785 * Device Size:  10 x 10 x 3.5 mm
1786 * Device Weight: 120.5g
1787
1788 = 9. Reference material =
1789
1790
1791 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1792
1793 = 10. FCC Warning =
1794
1795
1796 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1797
1798 (1) This device may not cause harmful interference；
1799
1800 (2) this device must accept any interference received, including interference that may cause undesired operation.