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Version 234.3 by Xiaoling on 2023/04/26 14:37
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
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6
7
8 **Table of Contents：**
9
10 {{toc/}}
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14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
23 )))
24
25 (((
26 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46 == 1.2 Features ==
47
48
49 * LoRaWAN v1.0.3 Class A protocol
50 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
51 * AT Commands to change parameters
52 * Remote configure parameters via LoRaWAN Downlink
53 * Firmware upgradeable via program port
54 * Built-in 2400mAh battery for up to 10 years of use.
55 * Built-in Temperature & Humidity sensor
56 * Optional External Sensors
57 * Tri-color LED to indicate working status
58 * Datalog feature (Max 3328 records)
59
60 == 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
131
132 == 2.3 Example to join LoRaWAN network ==
133
134
135 (% class="wikigeneratedid" %)
136 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.
137
138
139 (% class="wikigeneratedid" %)
140 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
141
142
143 (((
144 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:
145 )))
146
147
148 === 2.3.1 Step 1: Create Device n TTN ===
149
150
151 (((
152 Create a device in TTN V3 with the OTAA keys from LHT65N.
153 )))
154
155 (((
156 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
157 )))
158
159 [[image:image-20230426083319-1.png]]
160
161 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
162
163 Add APP EUI in the application.
164
165
166 [[image:image-20220522232916-3.png||_mstalt="430495"]]
167
168
169 [[image:image-20220522232932-4.png||_mstalt="430157"]]
170
171
172 [[image:image-20220522232954-5.png||_mstalt="431847"]]
173
174
175
176 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
177
178
179 [[image:image-20220522233026-6.png||_mstalt="429403"]]
180
181
182 Input APP EUI,  APP KEY and DEV EUI:
183
184
185 [[image:image-20220522233118-7.png||_mstalt="430430"]]
186
187
188 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
189
190
191 (((
192 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.
193 )))
194
195 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
196
197
198 == 2.4 Uplink Payload   ( Fport~=2) ==
199
200
201 (((
202 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
203 )))
204
205 (((
206 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
207 )))
208
209 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
210 |=(% style="width: 60px;" %)(((
211 **Size(bytes)**
212 )))|=(% style="width: 30px;" %)(((
213 **2**
214 )))|=(% style="width: 100px;" %)(((
215 **2**
216 )))|=(% style="width: 100px;" %)(((
217 **2**
218 )))|=(% style="width: 50px;" %)(((
219 **1**
220 )))|=(% style="width: 50px;" %)(((
221 **4**
222 )))
223 |(% style="width:97px" %)(((
224 **Value**
225 )))|(% style="width:39px" %)(((
226 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
227 )))|(% style="width:100px" %)(((
228 (((
229 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
230 )))
231 )))|(% style="width:77px" %)(((
232 (((
233 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
234 )))
235 )))|(% style="width:47px" %)(((
236 [[Ext>>||anchor="H2.4.5Ext23"]] #
237 )))|(% style="width:51px" %)(((
238 [[Ext value>>||anchor="H2.4.6Extvalue"]]
239 )))
240
241 * The First 6 bytes: has fix meanings for every LHT65N.
242 * The 7th byte (EXT #): defines the external sensor model.
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 [[image:image-20220523152839-18.png||_mstalt="457613"]]
262
263 (b)stands for binary
264
265 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
266
267
268 Check the battery voltage for LHT65N.
269
270 * BAT status=(0Xcba4>>14)&0xFF=11 (BIN) ，very good
271 * Battery Voltage =0xCBA4&0x3FFF=0x0BA4=2980mV
272
273 === 2.4.3 Built-in Temperature ===
274
275
276 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
277
278 * Temperature:  0x0ABB/100=27.47℃
279
280 [[image:image-20220522235639-3.png||_mstalt="432120"]]
281
282 * Temperature:  (0xF5C6-65536)/100=-26.18℃
283
284 === 2.4.4 Built-in Humidity ===
285
286
287 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
288
289 * Humidity:    0x025C/10=60.4%
290
291 === 2.4.5 Ext # ===
292
293
294 Bytes for External Sensor:
295
296 [[image:image-20220523152822-17.png||_mstalt="454545"]]
297
298
299 === 2.4.6 Ext value ===
300
301 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
302
303
304 [[image:image-20220522235639-5.png||_mstalt="432848"]]
305
306
307 * DS18B20 temp=0x0ADD/100=27.81℃
308
309 The last 2 bytes of data are meaningless
310
311
312
313 [[image:image-20220522235639-6.png||_mstalt="433212"]]
314
315
316 * External temperature= (0xF54F-65536)/100=-27.37℃
317
318 F54F :  (F54F & 8000 == 1) , temp = (F54F - 65536)/100 = 27.37℃
319
320 （0105 & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
321
322 The last 2 bytes of data are meaningless
323
324 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
325
326
327
328 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
329
330
331 (((
332 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:
333 )))
334
335 (((
336
337 )))
338
339 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
340 |=(% style="width: 50px;" %)(((
341 **Size(bytes)**
342 )))|=(% style="width: 70px;" %)(((
343 **2**
344 )))|=(% style="width: 120px;" %)(((
345 **2**
346 )))|=(% style="width: 120px;" %)(((
347 **2**
348 )))|=(% style="width: 50px;" %)(((
349 **1**
350 )))|=(% style="width: 70px;" %)(((
351 **4**
352 )))
353 |(% style="width:110px" %)(((
354 **Value**
355 )))|(% style="width:71px" %)(((
356 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
357 )))|(% style="width:99px" %)(((
358 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
359 )))|(% style="width:132px" %)(((
360 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
361 )))|(% style="width:54px" %)(((
362 Status & Ext
363 )))|(% style="width:64px" %)(((
364 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
365 )))
366
367 * **Battery status & Built-in Humidity**
368
369 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
370 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
371 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
372 BAT Status
373 00(b): Ultra Low ( BAT <= 2.50v)
374 01(b): Low  (2.50v <=BAT <= 2.55v)
375 10(b): OK   (2.55v <= BAT <=2.65v)
376 11(b): Good   (BAT >= 2.65v)
377 )))|(% style="width:132px" %)(((
378 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
379 )))
380
381 * **Status & Ext Byte**
382
383 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
384 |=(% scope="row" style="width: 60px;" %)**Bits**|(% style="width:90px" %)**7**|(% style="width:100px" %)**6**|(% style="width:90px" %)**5**|(% style="width:100px" %)**4**|(% style="width:60px" %)**[3:0]**
385 |=(% 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)
386
387 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
388 * (% 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.
389 * (% 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)
390
391 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
392
393
394 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
395
396 be used to power the external ADC sensor; user can control the power on time for this
397
398 (% style="color:blue" %)**sensor by setting:**
399
400 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
401
402 **For example:**
403
404 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
405
406
407 Or use **downlink command A2** to set the same.
408
409 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
410
411 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.
412
413 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
414
415
416 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
417
418 [[image:image-20220628150714-4.png||_mstalt="431054"]]
419
420
421 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.
422
423
424 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
425
426 [[image:image-20220628151005-5.png||_mstalt="429546"]]
427
428
429 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
430
431 [[image:image-20220628151056-6.png||_mstalt="431873"]]
432
433
434 3) Within range
435
436 [[image:image-20220628151143-7.png||_mstalt="431210"]]
437
438
439
440 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
441
442
443 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
444
445
446 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
447
448 [[image:image-20220906102307-7.png||_mstalt="430443"]]
449
450
451 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
452
453 The external cable NE2 can be use for MOD4 and MOD8
454
455
456
457 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
458
459
460 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
461
462
463 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
464
465 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
466
467 In Open State, the power consumption is the same as if there is no probe
468
469 In Close state, the power consumption will be 3uA higher than normal.
470
471 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
472
473
474 Ext=4,Interrupt Sensor：
475
476 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
477 |(% style="width:101px" %)(((
478 AT+EXT=4,1
479 )))|(% style="width:373px" %)(((
480 Sent uplink packet in both rising and falling interrupt
481 )))
482 |(% style="width:101px" %)(((
483 AT+EXT=4,2
484 )))|(% style="width:373px" %)(((
485 Sent uplink packet only in falling interrupt
486 )))
487 |(% style="width:101px" %)(((
488 AT+EXT=4,3
489 )))|(% style="width:373px" %)(((
490 Sent uplink packet only in rising interrupt
491 )))
492
493 Trigger by falling edge:
494
495 [[image:image-20220906101145-2.png||_mstalt="428324"]]
496
497
498 Trigger by raising edge：
499
500 [[image:image-20220906101145-3.png||_mstalt="428688"]]
501
502
503
504 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
505
506
507 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
508
509
510 (% 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.
511
512 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
513
514
515 (% 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
516
517 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
518
519
520 Ext=8, Counting Sensor ( 4 bytes)：
521
522 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
523 |(% style="width:138px" %)(((
524 AT+EXT=8,0
525 )))|(% style="width:240px" %)(((
526 Count at falling interrupt
527 )))
528 |(% style="width:138px" %)(((
529 AT+EXT=8,1
530 )))|(% style="width:240px" %)(((
531 Count at rising interrupt
532 )))
533 |(% style="width:138px" %)(((
534 AT+SETCNT=60
535 )))|(% style="width:240px" %)(((
536 Sent current count to 60
537 )))
538
539 [[image:image-20220906101320-6.png||_mstalt="428064"]]
540
541
542 (% style="color:blue" %)**A2 downlink Command：**
543
544 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
545
546 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
547
548 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
549
550 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
551
552 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)
553
554
555 == 2.5 Show data on Datacake ==
556
557
558 (((
559 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:
560 )))
561
562 (((
563
564 )))
565
566 (((
567 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
568 )))
569
570 (((
571 (% 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.
572 )))
573
574 (((
575
576 )))
577
578 (((
579 Add Datacake:
580 )))
581
582
583 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
584
585
586
587 Select default key as Access Key:
588
589
590 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
591
592
593 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
594
595
596 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
597
598
599 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
600
601
602 == 2.6 Datalog Feature ==
603
604
605 (((
606 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.
607 )))
608
609
610 === 2.6.1 Ways to get datalog via LoRaWAN ===
611
612
613 There are two methods:
614
615 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
616
617
618 (% 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.
619
620
621 (% style="color:red" %)**Note for method 2:**
622
623 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
624 * 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.
625
626 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
627
628
629 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
630
631
632 === 2.6.2 Unix TimeStamp ===
633
634
635 LHT65N uses Unix TimeStamp format based on
636
637
638 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
639
640
641
642 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
643
644 Below is the converter example
645
646 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
647
648
649 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
650
651
652 === 2.6.3 Set Device Time ===
653
654
655 (((
656 (% style="color:blue" %)**There are two ways to set device's time:**
657 )))
658
659 (((
660 **1.  Through LoRaWAN MAC Command (Default settings)**
661 )))
662
663 (((
664 User need to set SYNCMOD=1 to enable sync time via MAC command.
665 )))
666
667 (((
668 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).
669 )))
670
671 (((
672 (% 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.**
673 )))
674
675
676 (((
677 **2. Manually Set Time**
678 )))
679
680 (((
681 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
682 )))
683
684
685 === 2.6.4 Poll sensor value ===
686
687
688 User can poll sensor value based on timestamps from the server. Below is the downlink command.
689
690 [[image:image-20220523152302-15.png||_mstalt="451581"]]
691
692
693 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.
694
695 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
696
697 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
698
699 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
700
701
702 === 2.6.5 Datalog Uplink payload ===
703
704
705 The Datalog poll reply uplink will use below payload format.
706
707 **Retrieval data payload:**
708
709 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
710 |=(% style="width: 60px;" %)(((
711 **Size(bytes)**
712 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
713 |(% 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"]]
714
715 **Poll message flag & Ext:**
716
717 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
718
719 (% 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)
720
721 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
722
723 * Poll Message Flag is set to 1.
724
725 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
726
727 For example, in US915 band, the max payload for different DR is:
728
729 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
730
731 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
732
733 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
734
735 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
736
737 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
738
739
740 **Example:**
741
742 If LHT65N has below data inside Flash:
743
744 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
745
746
747 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
748
749 Where : Start time: 60065F97 = time 21/1/19 04:27:03
750
751 Stop time: 60066DA7= time 21/1/19 05:27:03
752
753
754 **LHT65N will uplink this payload.**
755
756 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
757
758
759 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
760
761 Where the first 11 bytes is for the first entry:
762
763 7FFF089801464160065F97
764
765 Ext sensor data=0x7FFF/100=327.67
766
767 Temp=0x088E/100=22.00
768
769 Hum=0x014B/10=32.6
770
771 poll message flag & Ext=0x41,means reply data,Ext=1
772
773 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
774
775
776 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
777
778
779 (((
780 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.
781 )))
782
783 (((
784 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
785
786
787 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
788
789
790 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
791
792 (((
793 (% class="box infomessage" %)
794 (((
795 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
796
797 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
798
799 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
800
801 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
802
803 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
804
805 **AT+LEDALARM=1** :       Enable LED visual Alarm.
806 )))
807 )))
808
809 (% style="color:#4f81bd" %)**Downlink Command:**
810
811 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
812
813 AT+CITEMP=1 : A60001
814
815 AT+ARTEMP=1,60  :  A70001003C
816
817 AT+ARTEMP=-16,60 :  A7FFF0003C
818
819 AT+LEDALARM=1  :  3601
820
821
822 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
823
824 Total bytes: 8 bytes
825
826 **Example: **AA0100010001003C
827
828 WMOD=01
829
830 CITEMP=0001
831
832 TEMPlow=0001
833
834 TEMPhigh=003C
835
836
837 **DS18B20 and TMP117 Threshold Alarm**
838
839 **~ AT+WMOD=1,60,-10,20**
840
841 (% style="color:#4f81bd" %)**Downlink Command:**
842
843 **Example: **A5013CFC180014
844
845 MOD=01
846
847 CITEMP=3C(S)
848
849 TEMPlow=FC18
850
851 TEMPhigh=0014
852
853
854 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
855
856 **AT+WMOD=2,60,5** 
857
858 (% style="color:#4f81bd" %)**Downlink Command:**
859
860 **Example: **A5023C05
861
862 MOD=02
863
864 CITEMP=3C(S)
865
866 temperature fluctuation=05
867
868
869 **Sampling multiple times and uplink together**
870
871 **AT+WMOD=3,1,60,20,-16,32,1**   
872
873 Explain:
874
875 * (% style="color:#037691" %)**parameter1:**(%%)Set Working Mode to **Mode 3**
876 * (% style="color:#037691" %)**parameter2:**(%%) Set the temperature sampling mode to** 1**(1:DS18B20;2:TMP117;3:** **Internal GXHT30).
877 * (% style="color:#037691" %)**parameter3:**(%%)Sampling Interval is **60**s.
878 * (% 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)
879 * (% style="color:#037691" %)**parameter5 & parameter6:**(%%)Temperature alarm range is **-16** to **32**°C,
880 * (% 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.
881
882 (% style="color:#4f81bd" %)**Downlink Command:**
883
884 **Example: **A50301003C14FFF0002001
885
886 MOD=03
887
888 TEMP=DS18B20
889
890 CITEMP=003C(S)
891
892 Total number of acquisitions=14
893
894 TEMPlow=FFF0
895
896 TEMPhigh=0020
897
898 ARTEMP=01
899
900 **Uplink payload( Fport=3)**
901
902 **Example: CBEA**01**0992**//0A41//**09C4**
903
904 BatV=CBEA
905
906 TEMP=DS18B20
907
908 Temp1=0992  ~/~/ 24.50℃
909
910 Temp2=0A41  ~/~/ 26.25℃
911
912 Temp3=09C4  ~/~/ 25.00℃
913
914 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
915
916 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
917 )))
918
919
920 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
921
922
923 (% class="box infomessage" %)
924 (((
925 (((
926 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
927 )))
928
929 (((
930 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
931 )))
932
933 (((
934 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
935 )))
936
937 (((
938 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
939 )))
940
941 (((
942 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
943 )))
944 )))
945
946 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
947
948 Total bytes: 8 bytes
949
950 **Example:**AA0100010001003C
951
952 WMOD=01
953
954 CITEMP=0001
955
956 TEMPlow=0001
957
958 TEMPhigh=003C
959
960
961 == 2.8 LED Indicator ==
962
963
964 The LHT65 has a triple color LED which for easy showing different stage .
965
966 While user press ACT button, the LED will work as per LED status with ACT button.
967
968 In a normal working state:
969
970 * For each uplink, the BLUE LED or RED LED will blink once.
971 BLUE LED when external sensor is connected.
972 * RED LED when external sensor is not connected
973 * For each success downlink, the PURPLE LED will blink once
974
975 == 2.9 installation ==
976
977
978 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
979
980
981 = 3. Sensors and Accessories =
982
983 == 3.1 E2 Extension Cable ==
984
985
986 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
987
988
989 **1m long breakout cable for LHT65N. Features:**
990
991 * (((
992 Use for AT Command， works for both LHT52/LHT65N
993 )))
994 * (((
995 Update firmware for LHT65N, works for both LHT52/LHT65N
996 )))
997 * (((
998 Supports ADC mode to monitor external ADC
999 )))
1000 * (((
1001 Supports Interrupt mode
1002 )))
1003 * (((
1004 Exposed All pins from the LHT65N Type-C connector.
1005
1006
1007
1008 )))
1009
1010 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1011
1012
1013 == 3.2 E3 Temperature Probe ==
1014
1015
1016 [[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"]]
1017
1018
1019 Temperature sensor with 2 meters cable long
1020
1021 * Resolution: 0.0625 °C
1022 * ±0.5°C accuracy from -10°C to +85°C
1023 * ±2°C accuracy from -55°C to +125°C
1024 * Operating Range: -40 ~~ 125 °C
1025 * Working voltage 2.35v ~~ 5v
1026
1027 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1028
1029
1030 (((
1031 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1032 )))
1033
1034 * (((
1035 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1036 )))
1037
1038 * (((
1039 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1040 )))
1041
1042 (((
1043 There are two kinds of commands to configure LHT65N, they are:
1044 )))
1045
1046 * (((
1047 (% style="color:#4f81bd" %)**General Commands**.
1048 )))
1049
1050 (((
1051 These commands are to configure:
1052 )))
1053
1054 1. (((
1055 General system settings like: uplink interval.
1056 )))
1057 1. (((
1058 LoRaWAN protocol & radio-related commands.
1059 )))
1060
1061 (((
1062 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]]
1063 )))
1064
1065 * (((
1066 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1067 )))
1068
1069 (((
1070 These commands are only valid for LHT65N, as below:
1071 )))
1072
1073
1074 == 4.1 Set Transmit Interval Time ==
1075
1076
1077 Feature: Change LoRaWAN End Node Transmit Interval.
1078
1079
1080 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1081
1082 [[image:image-20220523150701-2.png||_mstalt="427453"]]
1083
1084
1085 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1086
1087 Format: Command Code (0x01) followed by 3 bytes time value.
1088
1089 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1090
1091 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1092
1093 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1094
1095 == 4.2 Set External Sensor Mode ==
1096
1097
1098 Feature: Change External Sensor Mode.
1099
1100
1101 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1102
1103 [[image:image-20220523150759-3.png||_mstalt="432146"]]
1104
1105
1106 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1107
1108 Total bytes: 2 ~~ 5 bytes
1109
1110 **Example:**
1111
1112 * 0xA201: Set external sensor type to E1
1113
1114 * 0xA209: Same as AT+EXT=9
1115
1116 * 0xA20702003c: Same as AT+SETCNT=60
1117
1118 == 4.3 Enable/Disable uplink Temperature probe ID ==
1119
1120
1121 (((
1122 Feature: If PID is enabled, device will send the temperature probe ID on:
1123 )))
1124
1125 * (((
1126 First Packet after OTAA Join
1127 )))
1128 * (((
1129 Every 24 hours since the first packet.
1130 )))
1131
1132 (((
1133 PID is default set to disable (0)
1134
1135
1136 )))
1137
1138 (% style="color:#4f81bd" %)**AT Command:**
1139
1140 [[image:image-20220523150928-4.png||_mstalt="431821"]]
1141
1142
1143 (% style="color:#4f81bd" %)**Downlink Command:**
1144
1145 * **0xA800**  **~-~->** AT+PID=0
1146 * **0xA801**     **~-~->** AT+PID=1
1147
1148 == 4.4 Set Password ==
1149
1150
1151 Feature: Set device password, max 9 digits
1152
1153
1154 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1155
1156 [[image:image-20220523151052-5.png||_mstalt="428623"]]
1157
1158
1159 (% style="color:#4f81bd" %)**Downlink Command:**
1160
1161 No downlink command for this feature.
1162
1163
1164 == 4.5 Quit AT Command ==
1165
1166
1167 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1168
1169
1170 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1171
1172 [[image:image-20220523151132-6.png||_mstalt="428649"]]
1173
1174
1175 (% style="color:#4f81bd" %)**Downlink Command:**
1176
1177 No downlink command for this feature.
1178
1179
1180 == 4.6 Set to sleep mode ==
1181
1182
1183 Feature: Set device to sleep mode
1184
1185 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1186 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1187
1188 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1189
1190 [[image:image-20220523151218-7.png||_mstalt="430703"]]
1191
1192
1193 (% style="color:#4f81bd" %)**Downlink Command:**
1194
1195 * There is no downlink command to set to Sleep mode.
1196
1197 == 4.7 Set system time ==
1198
1199
1200 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1201
1202
1203 (% style="color:#4f81bd" %)**AT Command:**
1204
1205 [[image:image-20220523151253-8.png||_mstalt="430677"]]
1206
1207
1208 (% style="color:#4f81bd" %)**Downlink Command:**
1209
1210 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1211
1212
1213 == 4.8 Set Time Sync Mode ==
1214
1215
1216 (((
1217 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1218 )))
1219
1220 (((
1221 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.
1222
1223
1224 )))
1225
1226 (% style="color:#4f81bd" %)**AT Command:**
1227
1228 [[image:image-20220523151336-9.png||_mstalt="431717"]]
1229
1230
1231 (% style="color:#4f81bd" %)**Downlink Command:**
1232
1233 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1234 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1235
1236
1237 == 4.9 Set Time Sync Interval ==
1238
1239
1240 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1241
1242
1243 (% style="color:#4f81bd" %)**AT Command:**
1244
1245 [[image:image-20220523151411-10.png||_mstalt="449696"]]
1246
1247
1248 (% style="color:#4f81bd" %)**Downlink Command:**
1249
1250 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1251
1252
1253 == 4.10 Print data entries base on page. ==
1254
1255
1256 Feature: Print the sector data from start page to stop page (max is 416 pages).
1257
1258
1259 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1260
1261 [[image:image-20220523151450-11.png||_mstalt="451035"]]
1262
1263
1264 (% style="color:#4f81bd" %)**Downlink Command:**
1265
1266 No downlink commands for feature
1267
1268
1269 == 4.11 Print last few data entries. ==
1270
1271
1272 Feature: Print the last few data entries
1273
1274
1275 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1276
1277 [[image:image-20220523151524-12.png||_mstalt="452101"]]
1278
1279
1280 (% style="color:#4f81bd" %)**Downlink Command:**
1281
1282 No downlink commands for feature
1283
1284
1285 == 4.12 Clear Flash Record ==
1286
1287
1288 Feature: Clear flash storage for data log feature.
1289
1290
1291 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1292
1293 [[image:image-20220523151556-13.png||_mstalt="454129"]]
1294
1295
1296 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1297
1298 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1299
1300 == 4.13 Auto Send None-ACK messages ==
1301
1302
1303 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.
1304
1305
1306 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1307
1308 The default factory setting is 0
1309
1310 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1311 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1312 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1313
1314 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1315
1316 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1317
1318 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1319
1320
1321 Feature: Set internal and external temperature sensor alarms.
1322
1323 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1324 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1325 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1326
1327 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1328
1329 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1330
1331 0): Cancel
1332
1333 1): Threshold alarm
1334
1335 2): Fluctuation alarm
1336
1337
1338 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1339
1340 (% 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.**
1341
1342
1343 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1344
1345 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1346
1347 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1348
1349
1350 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.
1351
1352 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1353
1354 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1355
1356
1357 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1358
1359 0xA5 00 ~-~- AT+WMOD=0.
1360
1361 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 )
1362
1363 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))
1364
1365 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1366
1367 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.
1368
1369
1370 = 5. Battery & How to replace =
1371
1372 == 5.1 Battery Type ==
1373
1374
1375 (((
1376 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.
1377 )))
1378
1379 (((
1380 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1381
1382
1383 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1384 )))
1385
1386 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1387
1388
1389 == 5.2 Replace Battery ==
1390
1391
1392 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.
1393
1394 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1395
1396
1397 == 5.3 Battery Life Analyze ==
1398
1399
1400 (((
1401 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:
1402 [[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]]
1403 )))
1404
1405
1406 (((
1407 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]]
1408 )))
1409
1410
1411 = 6. FAQ =
1412
1413 == 6.1 How to use AT Command? ==
1414
1415
1416 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.
1417
1418 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1419
1420
1421 **Connection:**
1422
1423 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1424 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1425 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1426
1427 (((
1428 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.
1429 )))
1430
1431
1432 Input password and ATZ to activate LHT65N,As shown below:
1433
1434 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1435
1436
1437 AT Command List is as below:
1438
1439 AT+<CMD>? :  Help on <CMD>
1440
1441 AT+<CMD> :  Run <CMD>
1442
1443 AT+<CMD>=<value> :  Set the value
1444
1445 AT+<CMD>=? :  Get the value
1446
1447 AT+DEBUG:  Set more info output
1448
1449 ATZ:  Trig a reset of the MCU
1450
1451 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1452
1453 AT+DEUI:  Get or Set the Device EUI
1454
1455 AT+DADDR:  Get or Set the Device Address
1456
1457 AT+APPKEY:  Get or Set the Application Key
1458
1459 AT+NWKSKEY:  Get or Set the Network Session Key
1460
1461 AT+APPSKEY:  Get or Set the Application Session Key
1462
1463 AT+APPEUI:  Get or Set the Application EUI
1464
1465 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1466
1467 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1468
1469 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1470
1471 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1472
1473 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1474
1475 AT+RX2FQ:  Get or Set the Rx2 window frequency
1476
1477 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1478
1479 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1480
1481 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1482
1483 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1484
1485 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1486
1487 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1488
1489 AT+NWKID:  Get or Set the Network ID
1490
1491 AT+FCU:  Get or Set the Frame Counter Uplink
1492
1493 AT+FCD:  Get or Set the Frame Counter Downlink
1494
1495 AT+CLASS:  Get or Set the Device Class
1496
1497 AT+JOIN:  Join network
1498
1499 AT+NJS:  Get the join status
1500
1501 AT+SENDB:  Send hexadecimal data along with the application port
1502
1503 AT+SEND:  Send text data along with the application port
1504
1505 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1506
1507 AT+RECV:  Print last received data in raw format
1508
1509 AT+VER:  Get current image version and Frequency Band
1510
1511 AT+CFM:  Get or Set the confirmation mode (0-1)
1512
1513 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1514
1515 AT+SNR:  Get the SNR of the last received packet
1516
1517 AT+RSSI:  Get the RSSI of the last received packet
1518
1519 AT+TDC:  Get or set the application data transmission interval in ms
1520
1521 AT+PORT:  Get or set the application port
1522
1523 AT+DISAT:  Disable AT commands
1524
1525 AT+PWORD: Set password, max 9 digits
1526
1527 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1528
1529 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1530
1531 AT+PDTA:  Print the sector data from start page to stop page
1532
1533 AT+PLDTA:  Print the last few sets of data
1534
1535 AT+CLRDTA:  Clear the storage, record position back to 1st
1536
1537 AT+SLEEP:  Set sleep mode
1538
1539 AT+EXT:  Get or Set external sensor model
1540
1541 AT+BAT:  Get the current battery voltage in mV
1542
1543 AT+CFG:  Print all configurations
1544
1545 AT+WMOD:  Get or Set Work Mode
1546
1547 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1548
1549 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1550
1551 AT+SETCNT:  Set the count at present
1552
1553 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1554
1555 AT+RPL:  Get or set response level
1556
1557 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1558
1559 AT+LEAPSEC:  Get or Set Leap Second
1560
1561 AT+SYNCMOD:  Get or Set time synchronization method
1562
1563 AT+SYNCTDC:  Get or set time synchronization interval in day
1564
1565 AT+PID:  Get or set the PID
1566
1567
1568 == 6.2 Where to use AT commands and Downlink commands ==
1569
1570
1571 **AT commands：**
1572
1573 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1574
1575
1576 **Downlink commands:**
1577
1578
1579 (% style="color:blue" %)**TTN:**
1580
1581 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1582
1583
1584
1585 (% style="color:blue" %)**Helium：**
1586
1587 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1588
1589
1590
1591 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1592
1593
1594 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1595
1596
1597 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1598
1599
1600
1601 (% style="color:blue" %)**Aws:**
1602
1603 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1604
1605
1606 == 6.3 How to change the uplink interval？ ==
1607
1608
1609 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);"]]
1610
1611
1612 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1613
1614
1615 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1616
1617 [[image:1655802313617-381.png||_mstalt="293917"]]
1618
1619
1620 (((
1621 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.
1622 )))
1623
1624
1625 Input password and ATZ to activate LHT65N,As shown below:
1626
1627 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1628
1629
1630 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1631
1632
1633 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1634
1635
1636 (% 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.
1637
1638 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1639
1640
1641
1642 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1643
1644 First connect the four lines；(% style="display:none" %)
1645
1646 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1647
1648
1649 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1650
1651 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1652
1653
1654
1655 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1656
1657 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1658
1659
1660 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1661
1662
1663 When this interface appears, it indicates that the download has been completed.
1664
1665 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1666
1667
1668 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1669
1670
1671 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1672
1673
1674 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1675
1676
1677 **UART Port of LHT65N:**
1678
1679 * (% class="mark" %)**PB0: RXD**
1680 * (% class="mark" %)**PB1: TXD**
1681 * (% class="mark" %)**GND**
1682
1683 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1684
1685
1686 (((
1687 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.
1688 )))
1689
1690
1691 Input password and ATZ to activate LHT65N,As shown below:
1692
1693 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1694
1695
1696 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1697
1698
1699 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1700
1701
1702 (% 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.
1703
1704 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1705
1706
1707
1708 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1709
1710 First connect the four lines；
1711
1712 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1713
1714 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1715
1716
1717
1718 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1719
1720 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1721
1722
1723 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1724
1725
1726 When this interface appears, it indicates that the download has been completed.
1727
1728 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1729
1730
1731 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1732
1733
1734 == 6.8 Why can't I see the datalog information ==
1735
1736
1737 ~1. The time is not aligned, and the correct query command is not used.
1738
1739 2. Decoder error, did not parse the datalog data, the data was filtered.
1740
1741
1742 = 7. Order Info =
1743
1744
1745 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1746
1747 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1748
1749 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1750 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1751 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1752 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1753 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1754 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1755 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1756 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1757
1758 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1759
1760 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1761
1762 = 8. Packing Info =
1763
1764
1765 **Package Includes**:
1766
1767 * LHT65N Temperature & Humidity Sensor x 1
1768 * Optional external sensor
1769
1770 **Dimension and weight**:
1771
1772 * Device Size:  10 x 10 x 3.5 mm
1773 * Device Weight: 120.5g
1774
1775 = 9. Reference material =
1776
1777
1778 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1779
1780 = 10. FCC Warning =
1781
1782
1783 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1784
1785 (1) This device may not cause harmful interference；
1786
1787 (2) this device must accept any interference received, including interference that may cause undesired operation.