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Version 176.1 by Bei Jinggeng on 2022/06/23 11:43
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9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
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11 {{toc/}}
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15
16
17 = 1. Introduction =
18
19 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
20
21
22 (((
23 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.**
24 )))
25
26 (((
27 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.
28 )))
29
30 (((
31 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
32 )))
33
34 (((
35 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
36 )))
37
38 (((
39 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.
40 )))
41
42 (((
43 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
44 )))
45
46
47 == 1.2 Features ==
48
49 * Wall mountable
50 * LoRaWAN v1.0.3 Class A protocol
51 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
52 * AT Commands to change parameters
53 * Remote configure parameters via LoRaWAN Downlink
54 * Firmware upgradeable via program port
55 * Built-in 2400mAh battery for up to 10 years of use.
56 * Built-in Temperature & Humidity sensor
57 * Optional External Sensors
58 * Tri-color LED to indicate working status
59 * Datalog feature
60
61
62
63
64 == 1.3 Specification ==
65
66
67 **Built-in Temperature Sensor:**
68
69 * Resolution: 0.01 °C
70 * Accuracy Tolerance : Typ ±0.3 °C
71 * Long Term Drift: < 0.02 °C/yr
72 * Operating Range: -40 ~~ 85 °C
73
74 **Built-in Humidity Sensor:**
75
76 * Resolution: 0.04 %RH
77 * Accuracy Tolerance : Typ ±3 %RH
78 * Long Term Drift: < 0.02 °C/yr
79 * Operating Range: 0 ~~ 96 %RH
80
81 **External Temperature Sensor:**
82
83 * Resolution: 0.0625 °C
84 * ±0.5°C accuracy from -10°C to +85°C
85 * ±2°C accuracy from -55°C to +125°C
86 * Operating Range: -55 °C ~~ 125 °C
87
88
89
90
91 = 2. Connect LHT65N to IoT Server =
92
93 == 2.1 How does LHT65N work? ==
94
95 (((
96 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.
97 )))
98
99 (((
100 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.
101 )))
102
103
104 == 2.2 How to Activate LHT65N? ==
105
106 (((
107 The LHT65N has two working modes:
108 )))
109
110 * (((
111 (% 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.
112 )))
113 * (((
114 (% 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. 
115 )))
116
117 (((
118 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
119 )))
120
121
122 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
123
124 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
125
126
127
128 == 2.3 Example to join LoRaWAN network ==
129
130 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
131 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.
132
133 (% _mstvisible="1" class="wikigeneratedid" %)
134 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
135
136
137 (((
138 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:
139 )))
140
141
142
143 === 2.3.1 Step 1: Create Device n TTN ===
144
145 (((
146 Create a device in TTN V3 with the OTAA keys from LHT65N.
147 )))
148
149 (((
150 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
151 )))
152
153 [[image:image-20220617150003-1.jpeg]]
154
155 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
156
157 Add APP EUI in the application.
158
159
160 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
161
162
163 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
164
165
166 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
167
168
169 Note: LHT65N use same payload as LHT65.
170
171
172 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
173
174
175 Input APP EUI,  APP KEY and DEV EUI:
176
177
178 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
179
180
181
182
183 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
184
185 (((
186 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.
187 )))
188
189 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
190
191
192
193
194 == 2.4 Uplink Payload ==
195
196 (((
197 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% _mstvisible="3" style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
198 )))
199
200 (((
201 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
202 )))
203
204 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:426px" %)
205 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 97px;" %)(% _mstvisible="5" %)
206 (((
207 (% _mstvisible="6" %)
208 (% _msthash="1817478" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
209 )))|=(% _mstvisible="4" style="width: 39px;" %)(% _mstvisible="5" %)
210 (((
211 (% _mstvisible="6" %)
212 (% _msthash="1817479" _msttexthash="4550" _mstvisible="8" %)**2**
213 )))|=(% _mstvisible="4" style="width: 100px;" %)(% _mstvisible="5" %)
214 (((
215 (% _mstvisible="6" %)
216 (% _msthash="1817480" _msttexthash="4550" _mstvisible="8" %)**2**
217 )))|=(% _mstvisible="4" style="width: 77px;" %)(% _mstvisible="5" %)
218 (((
219 (% _mstvisible="6" %)
220 (% _msthash="1817481" _msttexthash="4550" _mstvisible="8" %)**2**
221 )))|=(% _mstvisible="4" style="width: 47px;" %)(% _mstvisible="5" %)
222 (((
223 (% _mstvisible="6" %)
224 (% _msthash="1817482" _msttexthash="4459" _mstvisible="8" %)**1**
225 )))|=(% _mstvisible="4" style="width: 51px;" %)(% _mstvisible="5" %)
226 (((
227 (% _mstvisible="6" %)
228 (% _msthash="1817483" _msttexthash="4732" _mstvisible="8" %)**4**
229 )))
230 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:97px" %)(% _mstvisible="5" %)
231 (((
232 (% _mstvisible="6" %)
233 (% _msthash="1817484" _msttexthash="60203" _mstvisible="8" %)**Value**
234 )))|(% _mstvisible="4" style="width:39px" %)(% _mstvisible="5" %)
235 (((
236 (% _mstvisible="6" %)
237 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo" _msthash="1817485" _msttexthash="22594" _mstvisible="7"]]
238 )))|(% _mstvisible="4" style="width:100px" %)(% _mstvisible="5" %)
239 (((
240 (% _mstvisible="6" %)
241 (((
242 (% _mstvisible="7" %)
243 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224742" _msttexthash="405769" _mstvisible="8"]]
244 )))
245 )))|(% _mstvisible="4" style="width:77px" %)(% _mstvisible="5" %)
246 (((
247 (% _mstvisible="6" %)
248 (((
249 (% _mstvisible="7" %)
250 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2224743" _msttexthash="105872" _mstvisible="8"]]
251 )))
252
253 (% _mstvisible="6" %)
254 (((
255 (% _mstvisible="7" %)
256 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224744" _msttexthash="117429" _mstvisible="8"]]
257 )))
258 )))|(% _mstvisible="4" style="width:47px" %)(% _mstvisible="5" %)
259 (((
260 (% _mstvisible="6" %)
261 [[Ext>>||anchor="H2.4.5Ext23" _msthash="1817486" _msttexthash="32331" _mstvisible="7"]] #
262 )))|(% _mstvisible="4" style="width:51px" %)(% _mstvisible="5" %)
263 (((
264 (% _mstvisible="6" %)
265 [[Ext value>>||anchor="H2.4.6Extvalue" _msthash="1817487" _msttexthash="116545" _mstvisible="7"]]
266 )))
267
268 * The First 6 bytes: has fix meanings for every LHT65N.
269 * The 7th byte (EXT #): defines the external sensor model.
270 * The 8(% _msthash="734578" _msttexthash="21372" _mstvisible="4" %)^^th^^(%%) ~~ 11(% _msthash="734579" _msttexthash="21372" _mstvisible="4" %)^^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.)
271
272
273
274 === 2.4.1 Decoder in TTN V3 ===
275
276 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.
277
278 Below is the position to put the decoder and LHT65N decoder can be download from here:
279
280
281 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0||_msthash="315253" _msttexthash="3509064" _mstvisible="2"]]
282
283
284 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
285
286
287
288
289 === 2.4.2 BAT-Battery Info ===
290
291 These two bytes of BAT include the battery state and the actually voltage
292
293 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
294
295
296 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
297
298
299 Check the battery voltage for LHT65N.
300
301 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
302 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
303
304
305
306 === 2.4.3 Built-in Temperature ===
307
308 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
309
310 * Temperature:  0x0ABB/100=27.47℃
311
312 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
313
314 * Temperature:  (0xF5C6-65536)/100=-26.18℃
315
316
317
318 === 2.4.4 Built-in Humidity ===
319
320 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
321
322 * Humidity:    0x025C/10=60.4%
323
324
325
326 === 2.4.5 Ext # ===
327
328 Bytes for External Sensor:
329
330 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
331
332
333
334 === 2.4.6 Ext value ===
335
336 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
337
338
339 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
340
341
342 * DS18B20 temp=0x0ADD/100=27.81℃
343
344 The last 2 bytes of data are meaningless
345
346 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
347
348
349 * External temperature= (0xF54F-65536)/100=-27.37℃
350
351 The last 2 bytes of data are meaningless
352
353 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
354
355
356
357 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
358
359 (((
360 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:
361 )))
362
363 (((
364
365 )))
366
367 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
368 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 96px;" %)(% _mstvisible="5" %)
369 (((
370 (% _mstvisible="6" %)
371 (% _msthash="1817488" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
372 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
373 (((
374 (% _mstvisible="6" %)
375 (% _msthash="1817489" _msttexthash="4550" _mstvisible="8" %)**2**
376 )))|=(% _mstvisible="4" style="width: 99px;" %)(% _mstvisible="5" %)
377 (((
378 (% _mstvisible="6" %)
379 (% _msthash="1817490" _msttexthash="4550" _mstvisible="8" %)**2**
380 )))|=(% _mstvisible="4" style="width: 132px;" %)(% _mstvisible="5" %)
381 (((
382 (% _mstvisible="6" %)
383 (% _msthash="1817491" _msttexthash="4550" _mstvisible="8" %)**2**
384 )))|=(% _mstvisible="4" style="width: 54px;" %)(% _mstvisible="5" %)
385 (((
386 (% _mstvisible="6" %)
387 (% _msthash="1817492" _msttexthash="4459" _mstvisible="8" %)**1**
388 )))|=(% _mstvisible="4" style="width: 64px;" %)(% _mstvisible="5" %)
389 (((
390 (% _mstvisible="6" %)
391 (% _msthash="1817493" _msttexthash="4732" _mstvisible="8" %)**4**
392 )))
393 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:96px" %)(% _mstvisible="5" %)
394 (((
395 (% _mstvisible="6" %)
396 (% _msthash="1817494" _msttexthash="60203" _mstvisible="8" %)**Value**
397 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
398 (((
399 (% _mstvisible="6" %)
400 [[External temperature>>||anchor="H4.2SetExternalSensorMode" _msthash="1817495" _msttexthash="426517" _mstvisible="7"]]
401 )))|(% _mstvisible="4" style="width:99px" %)(% _mstvisible="5" %)
402 (((
403 (% _mstvisible="6" %)
404 (((
405 (% _mstvisible="7" %)
406 [[Built-In>>||anchor="H2.4.3Built-inTemperature" _msthash="2224745" _msttexthash="100464" _mstvisible="8"]]
407 )))
408
409 (% _mstvisible="6" %)
410 (((
411 (% _mstvisible="7" %)
412 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224746" _msttexthash="184041" _mstvisible="8"]]
413 )))
414 )))|(% _mstvisible="4" style="width:132px" %)(% _mstvisible="5" %)
415 (((
416 (% _mstvisible="6" %)
417 (((
418 (% _msthash="2224747" _msttexthash="136331" _mstvisible="7" %)
419 BAT Status &
420 )))
421
422 (% _mstvisible="6" %)
423 (((
424 (% _mstvisible="7" %)
425 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224748" _msttexthash="311181" _mstvisible="8"]]
426 )))
427 )))|(% _mstvisible="4" style="width:54px" %)(% _mstvisible="5" %)
428 (((
429 (% _msthash="1817496" _msttexthash="147225" _mstvisible="6" %)
430 Status & Ext
431 )))|(% _mstvisible="4" style="width:64px" %)(% _mstvisible="5" %)
432 (((
433 (% _mstvisible="6" %)
434 (((
435 (% _mstvisible="7" %)
436 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2224749" _msttexthash="227175" _mstvisible="8"]]
437 )))
438 )))
439
440 (% _mstvisible="1" %)
441 * (% _msthash="2539669" _msttexthash="857922" _mstvisible="3" %)**Battery status & **(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Built-in Humidity**
442
443 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
444 (% _mstvisible="3" %)|=(% _msthash="1230918" _msttexthash="93158" _mstvisible="4" style="width: 65px;" %)Bit(bit)|=(% _msthash="1230919" _msttexthash="57954" _mstvisible="4" style="width: 267px;" %)[15:14]|=(% _msthash="1230920" _msttexthash="48022" _mstvisible="4" style="width: 134px;" %)[11:0]
445 (% _mstvisible="3" %)|(% _msthash="1230921" _msttexthash="60203" _mstvisible="4" style="width:65px" %)Value|(% _mstvisible="4" style="width:267px" %)(% _mstvisible="5" %)
446 (((
447 (% _msthash="1817497" _msttexthash="128427" _mstvisible="6" %)
448 BAT Status
449
450 (% _msthash="1817498" _msttexthash="472784" _mstvisible="6" %)
451 00(b): Ultra Low ( BAT <= 2.50v)
452
453 (% _msthash="1817499" _msttexthash="483678" _mstvisible="6" %)
454 01(b): Low  (2.50v <=BAT <= 2.55v)
455
456 (% _msthash="1817500" _msttexthash="440791" _mstvisible="6" %)
457 10(b): OK   (2.55v <= BAT <=2.65v)
458
459 (% _msthash="1817501" _msttexthash="334191" _mstvisible="6" %)
460 11(b): Good   (BAT >= 2.65v)
461 )))|(% _mstvisible="4" style="width:134px" %)(% _mstvisible="5" %)
462 (((
463 (% _mstvisible="6" %)
464 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="1817502" _msttexthash="311181" _mstvisible="7"]]
465
466 (% _mstvisible="6" %)
467
468 )))
469
470 * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
471
472 [[image:image-20220523152434-16.png||_mstalt="453921" _mstvisible="3"]]
473
474 * Poll Message Flag:  1: This message is a poll message reply, 0: means this is a normal uplink.
475 * 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.
476 * 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)
477
478
479
480 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
481
482 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
483
484 be used to power the external ADC sensor; user can control the power on time for this
485
486 sensor by setting:
487
488 AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
489
490
491
492 == 2.5 Show data on Datacake ==
493
494 (((
495 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:
496 )))
497
498 (((
499
500 )))
501
502 (((
503 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
504 )))
505
506 (((
507 (% 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.
508 )))
509
510 (((
511
512 )))
513
514 (((
515 Add Datacake:
516 )))
517
518
519 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
520
521
522
523 Select default key as Access Key:
524
525
526 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
527
528
529 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
530
531
532 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
533
534
535 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
536
537
538
539 == 2.6 Datalog Feature ==
540
541 (((
542 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.
543 )))
544
545
546
547 === 2.6.1 Ways to get datalog via LoRaWAN ===
548
549 There are two methods:
550
551 1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
552 1. Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will store the sensor data, and it will send all messages after network recover.
553
554
555
556 === 2.6.2 Unix TimeStamp ===
557
558
559 LHT65N uses Unix TimeStamp format based on
560
561
562 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
563
564
565
566 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
567
568 Below is the converter example
569
570 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
571
572 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
573
574
575
576 === 2.6.3 Set Device Time ===
577
578 (((
579 There are two ways to set device's time:
580 )))
581
582 (((
583 **~1. Through LoRaWAN MAC Command (Default settings)**
584 )))
585
586 (((
587 User need to set SYNCMOD=1 to enable sync time via MAC command.
588 )))
589
590 (((
591 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).
592 )))
593
594 (((
595 (% 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.
596 )))
597
598 (((
599
600 )))
601
602 (((
603 **2. Manually Set Time**
604 )))
605
606 (((
607 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
608 )))
609
610
611
612 === 2.6.4 Poll sensor value ===
613
614 User can poll sensor value based on timestamps from the server. Below is the downlink command.
615
616 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
617
618
619 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.
620
621 For example, downlink command **31 5FC5F350 5FC6 0160 05**
622
623 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
624
625 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
626
627
628
629 === 2.6.5 Datalog Uplink payload ===
630
631 (% _msthash="315267" _msttexthash="2245087" _mstvisible="1" %)
632 The Datalog poll reply uplink will use below payload format.
633
634 (% _mstvisible="1" %)
635 (((
636 (% _mstvisible="2" %)
637 (% _msthash="506080" _msttexthash="451581" _mstvisible="4" %)**Retrieval data payload**
638 )))
639
640 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
641 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 93px;" %)(% _mstvisible="5" %)
642 (((
643 (% _mstvisible="6" %)
644 (((
645 (% _mstvisible="7" %)
646 (% _msthash="2224750" _msttexthash="161122" _mstvisible="9" %)**Size(bytes)**
647 )))
648 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
649 (((
650 (% _mstvisible="6" %)
651 (((
652 (% _mstvisible="7" %)
653 (% _msthash="2224751" _msttexthash="4550" _mstvisible="9" %)**2**
654 )))
655 )))|=(% _mstvisible="4" style="width: 102px;" %)(% _mstvisible="5" %)
656 (((
657 (% _mstvisible="6" %)
658 (((
659 (% _mstvisible="7" %)
660 (% _msthash="2224752" _msttexthash="4550" _mstvisible="9" %)**2**
661 )))
662 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
663 (((
664 (% _mstvisible="6" %)
665 (((
666 (% _mstvisible="7" %)
667 (% _msthash="2224753" _msttexthash="4550" _mstvisible="9" %)**2**
668 )))
669 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
670 (((
671 (% _mstvisible="6" %)
672 (((
673 (% _mstvisible="7" %)
674 (% _msthash="2224754" _msttexthash="4459" _mstvisible="9" %)**1**
675 )))
676 )))|=(% _mstvisible="4" style="width: 48px;" %)(% _mstvisible="5" %)
677 (((
678 (% _mstvisible="6" %)
679 (((
680 (% _mstvisible="7" %)
681 (% _msthash="2224755" _msttexthash="4732" _mstvisible="9" %)**4**
682 )))
683 )))
684 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:93px" %)(% _mstvisible="5" %)
685 (((
686 (% _mstvisible="6" %)
687 (((
688 (% _mstvisible="7" %)
689 (% _msthash="2224756" _msttexthash="60203" _mstvisible="9" %)**Value**
690 )))
691 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
692 (((
693 (% _mstvisible="6" %)
694 (((
695 (% _mstvisible="7" %)
696 [[External sensor data>>||anchor="H2.4.6Extvalue" _msthash="2224757" _msttexthash="386672" _mstvisible="8"]]
697 )))
698 )))|(% _mstvisible="4" style="width:102px" %)(% _mstvisible="5" %)
699 (((
700 (% _mstvisible="6" %)
701 (((
702 (% _mstvisible="7" %)
703 (((
704 (% _mstvisible="8" %)
705 [[Built In>>||anchor="H2.4.3Built-inTemperature" _msthash="2671864" _msttexthash="91065" _mstvisible="9"]]
706 )))
707 )))
708
709 (% _mstvisible="6" %)
710 (((
711 (% _mstvisible="7" %)
712 (((
713 (% _mstvisible="8" %)
714 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2671865" _msttexthash="184041" _mstvisible="9"]]
715 )))
716 )))
717 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
718 (((
719 (% _mstvisible="6" %)
720 (((
721 (% _mstvisible="7" %)
722 (((
723 (% _mstvisible="8" %)
724 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2671866" _msttexthash="105872" _mstvisible="9"]]
725 )))
726 )))
727
728 (% _mstvisible="6" %)
729 (((
730 (% _mstvisible="7" %)
731 (((
732 (% _mstvisible="8" %)
733 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2671867" _msttexthash="117429" _mstvisible="9"]]
734 )))
735 )))
736 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
737 (((
738 (% _mstvisible="6" %)
739 (((
740 (% _msthash="2224758" _msttexthash="390390" _mstvisible="7" %)
741 Poll message flag & Ext
742 )))
743 )))|(% _mstvisible="4" style="width:48px" %)(% _mstvisible="5" %)
744 (((
745 (% _mstvisible="6" %)
746 (((
747 (% _mstvisible="7" %)
748 (((
749 (% _mstvisible="8" %)
750 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2671868" _msttexthash="227175" _mstvisible="9"]]
751 )))
752 )))
753
754 (% _mstvisible="6" %)
755 (((
756 (% _mstvisible="7" %)
757 (((
758 (% _mstvisible="8" %)
759
760 )))
761 )))
762 )))
763
764 (% _mstvisible="1" %)
765 (% _msthash="315268" _msttexthash="390390" _mstvisible="3" %)**Poll message flag & Ext**
766
767 (% _mstvisible="1" %)
768 [[image:image-20220523152208-14.png||_mstalt="452920" _mstvisible="3"]]
769
770 (% _mstvisible="1" %)
771 (((
772 (% _mstvisible="2" %)
773 (((
774 (% _msthash="736723" _msttexthash="2005003" _mstvisible="3" %)
775 (((
776 Poll Message Flag: 1: This message is a poll message reply.
777 )))
778 )))
779 )))
780
781 (% _mstvisible="1" %)
782 * (% _mstvisible="3" %)
783 (((
784 (% _mstvisible="4" %)
785 (((
786 (% _msthash="1197157" _msttexthash="561548" _mstvisible="5" %)
787 (((
788 Poll Message Flag is set to 1.
789 )))
790 )))
791 )))
792 * (% _mstvisible="3" %)
793 (((
794 (% _mstvisible="4" %)
795 (((
796 (% _msthash="1197158" _msttexthash="9284964" _mstvisible="5" %)
797 (((
798 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
799 )))
800 )))
801 )))
802
803 (% _mstvisible="1" %)
804 (((
805 (% _mstvisible="2" %)
806 (((
807 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
808 (((
809
810 )))
811
812 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
813 (((
814 For example, in US915 band, the max payload for different DR is:
815 )))
816 )))
817 )))
818
819 (% _mstvisible="1" %)
820 (((
821 (% _mstvisible="2" %)
822 (((
823 (% _msthash="736725" _msttexthash="1065532" _mstvisible="3" %)
824 (((
825 a) DR0: max is 11 bytes so one entry of data
826 )))
827 )))
828 )))
829
830 (% _mstvisible="1" %)
831 (((
832 (% _mstvisible="2" %)
833 (((
834 (% _msthash="736726" _msttexthash="3265665" _mstvisible="3" %)
835 (((
836 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
837 )))
838 )))
839 )))
840
841 (% _mstvisible="1" %)
842 (((
843 (% _mstvisible="2" %)
844 (((
845 (% _msthash="736727" _msttexthash="1454115" _mstvisible="3" style="text-align: left;" %)
846 (((
847 c) DR2: total payload includes 11 entries of data
848 )))
849 )))
850 )))
851
852 (% _mstvisible="1" %)
853 (((
854 (% _mstvisible="2" %)
855 (((
856 (% _msthash="736728" _msttexthash="1483924" _mstvisible="3" style="text-align: left;" %)
857 (((
858 d) DR3: total payload includes 22 entries of data.
859 )))
860 )))
861 )))
862
863 (% _mstvisible="1" %)
864 (((
865 (% _mstvisible="2" %)
866 (((
867 (% _msthash="736729" _msttexthash="5848349" _mstvisible="3" style="text-align: left;" %)
868 (((
869 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
870 )))
871 )))
872 )))
873
874
875 (% _mstvisible="1" style="text-align: left;" %)
876 (% _msthash="315269" _msttexthash="104767" _mstvisible="3" %)**Example:**
877
878 (% _msthash="315270" _msttexthash="913822" _mstvisible="1" style="text-align: left;" %)
879 If LHT65N has below data inside Flash:
880
881 (% _mstvisible="1" %)
882 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
883
884 (% _mstvisible="1" %)
885 (((
886 (% _msthash="506081" _msttexthash="1663961" _mstvisible="2" style="text-align: left;" %)
887 If user sends below downlink command: (% _mstvisible="3" style="background-color:yellow" %)3160065F9760066DA705
888 )))
889
890 (% _mstvisible="1" %)
891 (((
892 (% _msthash="506082" _msttexthash="1092494" _mstvisible="2" style="text-align: left;" %)
893 Where : Start time: 60065F97 = time 21/1/19 04:27:03
894 )))
895
896 (% _mstvisible="1" %)
897 (((
898 (% _msthash="506083" _msttexthash="737269" _mstvisible="2" style="text-align: left;" %)
899 Stop time 60066DA7= time 21/1/19 05:27:(% _msthash="903005" _msttexthash="9672" _mstvisible="2" %)03
900 )))
901
902 (% _mstvisible="1" %)
903 (((
904 (% _mstvisible="2" %)
905
906 )))
907
908 (% _mstvisible="1" %)
909 (((
910 (% _msthash="506084" _msttexthash="751218" _mstvisible="2" style="text-align: left;" %)
911 LHT65N will uplink this payload.
912 )))
913
914 (% _mstvisible="1" %)
915 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
916
917 (% _msthash="315271" _msttexthash="12012546" _mstvisible="1" style="text-align: left;" %)
918 (((
919 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
920 )))
921
922 (% _msthash="315237" _msttexthash="1385839" %)
923 (((
924 Where the first 11 bytes is for the first entry:
925 )))
926
927 (% _msthash="315238" _msttexthash="274846" %)
928 (((
929 7FFF089801464160065F97
930 )))
931
932 (% _msthash="315239" _msttexthash="617435" %)
933 (((
934 Ext sensor data=0x7FFF/100=327.67
935 )))
936
937 (% _msthash="315240" _msttexthash="270543" %)
938 (((
939 Temp=0x0898/100=22.00
940 )))
941
942 (% _msthash="315241" _msttexthash="211783" %)
943 (((
944 Hum=0x0146/10=32.6
945 )))
946
947 (% _msthash="315242" _msttexthash="1569776" %)
948 (((
949 poll message flag & Ext=0x41,means reply data,Ext=1
950 )))
951
952 (% _msthash="315243" _msttexthash="1120509" %)
953 (((
954 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
955 )))
956
957
958
959 == 2.7 Alarm Mode ==
960
961 (((
962 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.
963 )))
964
965 (((
966 (% style="color:red" %)Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.
967 )))
968
969 (((
970 **AT COMMAND FOR ALARM MODE:**
971 )))
972
973 (% _mstvisible="1" class="box infomessage" %)
974 (((
975 (((
976 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled)
977 )))
978
979 (((
980 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
981 )))
982
983 (((
984 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
985 )))
986
987 (((
988 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
989 )))
990
991 (((
992 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
993 )))
994 )))
995
996
997
998 == 2.8 LED Indicator ==
999
1000 The LHT65 has a triple color LED which for easy showing different stage .
1001
1002 While user press ACT button, the LED will work as per LED status with ACT button.
1003
1004 In a normal working state:
1005
1006 * For each uplink, the BLUE LED or RED LED will blink once.
1007 BLUE LED when external sensor is connected.
1008 * RED LED when external sensor is not connected
1009 * For each success downlink, the PURPLE LED will blink once
1010
1011
1012
1013 == 2.9 installation ==
1014
1015 (% _mstvisible="1" %)
1016 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
1017
1018
1019
1020 = 3. Sensors and Accessories =
1021
1022 == 3.1 E2 Extension Cable ==
1023
1024 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
1025
1026 1m long breakout cable for LHT65N
1027
1028 [[image:image-20220619092421-3.png||height="371" width="529"]]
1029
1030
1031
1032
1033 == 3.2 E3 Temperature Probe ==
1034
1035
1036 [[image:image-20220515080154-4.png||_mstalt="434681" _mstvisible="3" alt="photo-20220515080154-4.png" height="182" width="161"]] [[image:image-20220515080330-5.png||_mstalt="428792" _mstvisible="3" height="201" width="195"]]
1037
1038
1039 Temperature sensor with 2 meters cable long
1040
1041 * Resolution: 0.0625 °C
1042 * ±0.5°C accuracy from -10°C to +85°C
1043 * ±2°C accuracy from -55°C to +125°C
1044 * Operating Range: -40 ~~ 125 °C
1045 * Working voltage 2.35v ~~ 5v
1046
1047
1048
1049 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1050
1051 (((
1052 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1053 )))
1054
1055 * (((
1056 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1057 )))
1058
1059 * (((
1060 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1061 )))
1062
1063 (((
1064 There are two kinds of commands to configure LHT65N, they are:
1065 )))
1066
1067 * (((
1068 (% style="color:#4f81bd" %)**General Commands**.
1069 )))
1070
1071 (((
1072 These commands are to configure:
1073 )))
1074
1075 1. (((
1076 General system settings like: uplink interval.
1077 )))
1078 1. (((
1079 LoRaWAN protocol & radio-related commands.
1080 )))
1081
1082 (((
1083 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]]
1084 )))
1085
1086 * (((
1087 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1088 )))
1089
1090 (((
1091 These commands are only valid for LHT65N, as below:
1092 )))
1093
1094
1095 == 4.1 Set Transmit Interval Time ==
1096
1097 Feature: Change LoRaWAN End Node Transmit Interval.
1098
1099 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1100
1101 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1102
1103
1104 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1105
1106 Format: Command Code (0x01) followed by 3 bytes time value.
1107
1108 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1109
1110 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1111
1112 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1113
1114
1115
1116 == 4.2 Set External Sensor Mode ==
1117
1118 Feature: Change External Sensor Mode.
1119
1120 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1121
1122 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1123
1124
1125 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1126
1127 Total bytes: 2 ~~ 5 bytes
1128
1129 **Example:**
1130
1131 * 0xA201: Set external sensor type to E1
1132
1133 * 0xA209: Same as AT+EXT=9
1134
1135 * 0xA20702003c: Same as AT+SETCNT=60
1136
1137
1138
1139 == 4.3 Enable/Disable uplink Temperature probe ID ==
1140
1141 (((
1142 Feature: If PID is enabled, device will send the temperature probe ID on:
1143 )))
1144
1145 * (((
1146 First Packet after OTAA Join
1147 )))
1148 * (((
1149 Every 24 hours since the first packet.
1150 )))
1151
1152 (((
1153 PID is default set to disable (0)
1154 )))
1155
1156 (% style="color:#4f81bd" %)**AT Command:**
1157
1158 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1159
1160
1161 (% style="color:#4f81bd" %)**Downlink Command:**
1162
1163 * **0xA800**  **~-~->** AT+PID=0
1164 * **0xA801**     **~-~->** AT+PID=1
1165
1166
1167
1168 == 4.4 Set Password ==
1169
1170 Feature: Set device password, max 9 digits
1171
1172 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1173
1174 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1175
1176
1177 (% style="color:#4f81bd" %)**Downlink Command:**
1178
1179 No downlink command for this feature.
1180
1181
1182
1183 == 4.5 Quit AT Command ==
1184
1185 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1186
1187 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1188
1189 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1190
1191
1192 (% style="color:#4f81bd" %)**Downlink Command:**
1193
1194 No downlink command for this feature.
1195
1196
1197
1198 == 4.6 Set to sleep mode ==
1199
1200 Feature: Set device to sleep mode
1201
1202 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1203 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1204
1205 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1206
1207 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1208
1209
1210 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1211
1212 * There is no downlink command to set to Sleep mode.
1213
1214
1215
1216 == 4.7 Set system time ==
1217
1218 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1219
1220 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1221
1222 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1223
1224
1225 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1226
1227 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1228
1229
1230
1231 == 4.8 Set Time Sync Mode ==
1232
1233 (((
1234 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1235 )))
1236
1237 (((
1238 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.
1239 )))
1240
1241 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1242
1243 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1244
1245
1246 (% style="color:#4f81bd" %)**Downlink Command:**
1247
1248 0x28 01 ~/~/ Same As AT+SYNCMOD=1
1249 0x28 00 ~/~/ Same As AT+SYNCMOD=0
1250
1251
1252
1253 == 4.9 Set Time Sync Interval ==
1254
1255 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1256
1257 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1258
1259 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1260
1261
1262 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1263
1264 **0x29 0A** ~/~/ Same as AT+SYNCTDC=0x0A
1265
1266
1267
1268 == 4.10 Print data entries base on page. ==
1269
1270 Feature: Print the sector data from start page to stop page (max is 416 pages).
1271
1272 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1273
1274 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1275
1276
1277 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1278
1279 No downlink commands for feature
1280
1281
1282
1283 == 4.11 Print last few data entries. ==
1284
1285 Feature: Print the last few data entries
1286
1287 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1288
1289 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1290
1291
1292 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1293
1294 No downlink commands for feature
1295
1296
1297
1298 == 4.12 Clear Flash Record ==
1299
1300 Feature: Clear flash storage for data log feature.
1301
1302
1303 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1304
1305 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1306
1307
1308 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1309
1310 * Example: 0xA301 ~/~/Same as AT+CLRDTA
1311
1312
1313
1314 == 4.13 Auto Send None-ACK messages ==
1315
1316 (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
1317 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.
1318
1319 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1320
1321 (% _msthash="315396" _msttexthash="734682" _mstvisible="1" %)
1322 The default factory setting is 0
1323
1324 (% _mstvisible="1" border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1325 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 171px;" %)(% _msthash="1231737" _msttexthash="251862" _mstvisible="6" %)**Command Example**|=(% _mstvisible="4" style="width: 219px;" %)(% _msthash="1231738" _msttexthash="116025" _mstvisible="6" %)**Function**|=(% _mstvisible="4" style="width: 119px;" %)(% _msthash="1231739" _msttexthash="116831" _mstvisible="6" %)**Response**
1326 (% _mstvisible="3" %)|(% _msthash="1231321" _msttexthash="130455" _mstvisible="4" style="width:171px" %)AT+PNACKMD=1|(% _msthash="1231322" _msttexthash="377026" _mstvisible="4" style="width:219px" %)Poll None-ACK message|(% _msthash="1231323" _msttexthash="14989" _mstvisible="4" style="width:119px" %)OK
1327
1328 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1329
1330 * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1331
1332
1333
1334 = 5. Battery & How to replace =
1335
1336 == 5.1 Battery Type ==
1337
1338 (((
1339 (((
1340 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.
1341 )))
1342 )))
1343
1344 (((
1345
1346 )))
1347
1348 (((
1349 (((
1350 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1351 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1352 )))
1353 )))
1354
1355 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1356
1357
1358 == 5.2 Replace Battery ==
1359
1360 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.
1361
1362 [[image:image-20220515075440-2.png||_mstalt="429546" _mstvisible="3" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" _mstvisible="3" height="193" width="257"]]
1363
1364
1365 == 5.3 Battery Life Analyze ==
1366
1367 (((
1368 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:
1369 [[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]]
1370 )))
1371
1372 (((
1373
1374 )))
1375
1376 (((
1377 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]]
1378 )))
1379
1380
1381
1382 = 6. FAQ =
1383
1384 == 6.1 How to use AT Command? ==
1385
1386 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.
1387
1388 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1389
1390
1391 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1392
1393 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1394 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1395 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1396 * (% style="background-color:yellow" %)**USB to TTL 3.3V <~-~-> D-**
1397
1398 (((
1399 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.
1400 )))
1401
1402
1403 Input password and ATZ to activate LHT65N,As shown below:
1404
1405 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1406
1407
1408 (% _msthash="506066" _msttexthash="544869" %)
1409 AT Command List is as below:
1410
1411 (% _msthash="506067" _msttexthash="361920" %)
1412 AT+<CMD>? :  Help on <CMD>
1413
1414 (% _msthash="506068" _msttexthash="243061" %)
1415 AT+<CMD> :  Run <CMD>
1416
1417 (% _msthash="506069" _msttexthash="704197" %)
1418 AT+<CMD>=<value> :  Set the value
1419
1420 (% _msthash="506070" _msttexthash="455676" %)
1421 AT+<CMD>=? :  Get the value
1422
1423 (% _msthash="506071" _msttexthash="670553" %)
1424 AT+DEBUG:  Set more info output
1425
1426 (% _msthash="506072" _msttexthash="485888" %)
1427 ATZ:  Trig a reset of the MCU
1428
1429 (% _msthash="506073" _msttexthash="2068872" %)
1430 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1431
1432 (% _msthash="506074" _msttexthash="689169" %)
1433 AT+DEUI:  Get or Set the Device EUI
1434
1435 (% _msthash="506075" _msttexthash="960414" %)
1436 AT+DADDR:  Get or Set the Device Address
1437
1438 (% _msthash="506076" _msttexthash="1079897" %)
1439 AT+APPKEY:  Get or Set the Application Key
1440
1441 (% _msthash="506077" _msttexthash="1326143" %)
1442 AT+NWKSKEY:  Get or Set the Network Session Key
1443
1444 (% _msthash="506078" _msttexthash="1573000" %)
1445 AT+APPSKEY:  Get or Set the Application Session Key
1446
1447 (% _msthash="506079" _msttexthash="1041729" %)
1448 AT+APPEUI:  Get or Set the Application EUI
1449
1450 (% _msthash="506080" _msttexthash="2104206" %)
1451 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1452
1453 (% _msthash="506081" _msttexthash="3369288" %)
1454 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1455
1456 (% _msthash="506082" _msttexthash="1894529" %)
1457 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1458
1459 (% _msthash="506083" _msttexthash="3864172" %)
1460 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1461
1462 (% _msthash="506084" _msttexthash="1712204" %)
1463 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1464
1465 (% _msthash="506085" _msttexthash="1281202" %)
1466 AT+RX2FQ:  Get or Set the Rx2 window frequency
1467
1468 (% _msthash="506086" _msttexthash="2796781" %)
1469 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1470
1471 (% _msthash="506087" _msttexthash="3285165" %)
1472 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1473
1474 (% _msthash="506088" _msttexthash="3286179" %)
1475 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1476
1477 (% _msthash="506089" _msttexthash="4703803" %)
1478 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1479
1480 (% _msthash="506090" _msttexthash="4704999" %)
1481 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1482
1483 (% _msthash="506091" _msttexthash="1528683" %)
1484 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1485
1486 (% _msthash="506092" _msttexthash="757185" %)
1487 AT+NWKID:  Get or Set the Network ID
1488
1489 (% _msthash="506093" _msttexthash="1156597" %)
1490 AT+FCU:  Get or Set the Frame Counter Uplink
1491
1492 (% _msthash="506094" _msttexthash="1273987" %)
1493 AT+FCD:  Get or Set the Frame Counter Downlink
1494
1495 (% _msthash="506095" _msttexthash="859222" %)
1496 AT+CLASS:  Get or Set the Device Class
1497
1498 (% _msthash="506096" _msttexthash="384852" %)
1499 AT+JOIN:  Join network
1500
1501 (% _msthash="506097" _msttexthash="548626" %)
1502 AT+NJS:  Get the join status
1503
1504 (% _msthash="506098" _msttexthash="2546206" %)
1505 AT+SENDB:  Send hexadecimal data along with the application port
1506
1507 (% _msthash="506099" _msttexthash="1932307" %)
1508 AT+SEND:  Send text data along with the application port
1509
1510 (% _msthash="506100" _msttexthash="3560557" %)
1511 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1512
1513 (% _msthash="506101" _msttexthash="1429701" %)
1514 AT+RECV:  Print last received data in raw format
1515
1516 (% _msthash="506102" _msttexthash="1735981" %)
1517 AT+VER:  Get current image version and Frequency Band
1518
1519 (% _msthash="506103" _msttexthash="1189474" %)
1520 AT+CFM:  Get or Set the confirmation mode (0-1)
1521
1522 (% _msthash="506104" _msttexthash="1718210" %)
1523 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1524
1525 (% _msthash="506105" _msttexthash="1339403" %)
1526 AT+SNR:  Get the SNR of the last received packet
1527
1528 (% _msthash="506106" _msttexthash="1452009" %)
1529 AT+RSSI:  Get the RSSI of the last received packet
1530
1531 (% _msthash="506107" _msttexthash="2768142" %)
1532 AT+TDC:  Get or set the application data transmission interval in ms
1533
1534 (% _msthash="506108" _msttexthash="1083914" %)
1535 AT+PORT:  Get or set the application port
1536
1537 (% _msthash="506109" _msttexthash="622440" %)
1538 AT+DISAT:  Disable AT commands
1539
1540 (% _msthash="506110" _msttexthash="868361" %)
1541 AT+PWORD: Set password, max 9 digits
1542
1543 (% _msthash="506111" _msttexthash="2210299" %)
1544 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1545
1546 (% _msthash="506112" _msttexthash="2113462" %)
1547 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1548
1549 (% _msthash="506113" _msttexthash="2087423" %)
1550 AT+PDTA:  Print the sector data from start page to stop page
1551
1552 (% _msthash="506114" _msttexthash="1063127" %)
1553 AT+PLDTA:  Print the last few sets of data
1554
1555 (% _msthash="506115" _msttexthash="1999426" %)
1556 AT+CLRDTA:  Clear the storage, record position back to 1st
1557
1558 (% _msthash="506116" _msttexthash="442130" %)
1559 AT+SLEEP:  Set sleep mode
1560
1561 (% _msthash="506117" _msttexthash="1080222" %)
1562 AT+EXT:  Get or Set external sensor model
1563
1564 (% _msthash="506118" _msttexthash="1309490" %)
1565 AT+BAT:  Get the current battery voltage in mV
1566
1567 (% _msthash="506119" _msttexthash="813891" %)
1568 AT+CFG:  Print all configurations
1569
1570 (% _msthash="506120" _msttexthash="551707" %)
1571 AT+WMOD:  Get or Set Work Mode
1572
1573 (% _msthash="506121" _msttexthash="2631499" %)
1574 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1575
1576 (% _msthash="506122" _msttexthash="3907150" %)
1577 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1578
1579 (% _msthash="506123" _msttexthash="854620" %)
1580 AT+SETCNT:  Set the count at present
1581
1582 (% _msthash="506124" _msttexthash="2554877" %)
1583 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1584
1585 (% _msthash="506125" _msttexthash="771849" %)
1586 AT+RPL:  Get or set response level
1587
1588 (% _msthash="506126" _msttexthash="1484314" %)
1589 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1590
1591 (% _msthash="506127" _msttexthash="741728" %)
1592 AT+LEAPSEC:  Get or Set Leap Second
1593
1594 (% _msthash="506128" _msttexthash="1694017" %)
1595 AT+SYNCMOD:  Get or Set time synchronization method
1596
1597 (% _msthash="506129" _msttexthash="2235948" %)
1598 AT+SYNCTDC:  Get or set time synchronization interval in day
1599
1600 (% _msthash="506130" _msttexthash="425542" %)
1601 AT+PID:  Get or set the PID
1602
1603
1604 == 6.2 Where to use AT commands and Downlink commands ==
1605
1606 (% _msthash="506131" _msttexthash="14585714" %)
1607 AT commands：
1608
1609 [[image:image-20220620153708-1.png||height="603" width="723"]]
1610
1611 (% _msthash="506132" _msttexthash="337922" %)
1612 Downlink commands:
1613
1614
1615 (% _msthash="506133" _msttexthash="33046" %)
1616 **TTN:**
1617
1618 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1619
1620
1621 (% _msthash="506134" _msttexthash="11113791" %)
1622 **Helium：**
1623
1624 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1625
1626
1627 (% _msthash="506135" _msttexthash="4159844" %)
1628 **Chirpstack:The downlink window will not be displayed until the network is accessed**
1629
1630 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1631
1632 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1633
1634
1635 (% _msthash="506136" _msttexthash="39286" %)
1636 **Aws:**
1637
1638 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1639
1640
1641
1642 == 6.3 How to change the uplink interval？ ==
1643
1644 [[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/||_msthash="506137" _msttexthash="5712018"]]
1645
1646
1647
1648 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1649
1650 [[image:image-20220615153355-1.png]]
1651
1652 [[image:1655802313617-381.png]]
1653
1654
1655 (((
1656 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.
1657 )))
1658
1659
1660 Input password and ATZ to activate LHT65N,As shown below:
1661
1662 [[image:image-20220615154519-3.png||height="672" width="807"]]
1663
1664
1665
1666 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1667
1668
1669 [[image:image-20220615153355-1.png]]
1670
1671
1672 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1673
1674 [[image:image-20220615170542-5.png]]
1675
1676
1677 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1678
1679 (% _msthash="506146" _msttexthash="52173160" %)
1680 First connect the four lines；(% style="display:none" %)
1681
1682 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1683
1684
1685 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1686
1687 [[image:image-20220621170938-2.png]]
1688
1689
1690 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1691
1692 [[image:image-20220615171334-6.png]]
1693
1694
1695 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1696
1697
1698 When this interface appears, it indicates that the download has been completed.
1699
1700 [[image:image-20220620160723-8.png]]
1701
1702
1703 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1704
1705
1706 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1707
1708 [[image:image-20220623110706-1.png]]
1709
1710
1711 [[image:image-20220623112117-4.png||height="459" width="343"]]
1712
1713 (((
1714 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.
1715 )))
1716
1717
1718 Input password and ATZ to activate LHT65N,As shown below:
1719
1720 [[image:image-20220615154519-3.png||height="672" width="807"]]
1721
1722
1723 == 6.6 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1724
1725 [[image:image-20220623110706-1.png]]
1726
1727 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1728
1729 [[image:image-20220615170542-5.png]]
1730
1731
1732 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1733
1734 (% _msthash="506146" _msttexthash="52173160" %)
1735 First connect the four lines；
1736
1737 (% _msthash="506146" _msttexthash="52173160" %)
1738 [[image:image-20220623113959-5.png||height="528" width="397"]]
1739
1740 (% _msthash="506146" _msttexthash="52173160" %)
1741 Press and hold the start key to restart and enter  (% _mstvisible="1" %)bootlaod(%%) mode.
1742
1743 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1744
1745 [[image:image-20220615171334-6.png]]
1746
1747
1748 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1749
1750
1751 When this interface appears, it indicates that the download has been completed.
1752
1753 [[image:image-20220620160723-8.png]]
1754
1755
1756 Finally,restart reset device again
1757
1758
1759 = 7. Order Info =
1760
1761
1762 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1763
1764 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1765
1766 (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1767
1768 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1769
1770 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1771
1772 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1773
1774 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1775
1776 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1777
1778 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1779
1780 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1781
1782 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1783
1784 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1785
1786
1787
1788 = 8. Packing Info =
1789
1790
1791 **Package Includes**:
1792
1793 * LHT65N Temperature & Humidity Sensor x 1
1794 * Optional external sensor
1795
1796 **Dimension and weight**:
1797
1798 * Device Size:  10 x 10 x 3.5 cm
1799 * Device Weight: 120.5g
1800
1801
1802
1803 = 9. Reference material =
1804
1805 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1806
1807
1808
1809 = 10. FCC Warning =
1810
1811 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1812
1813 (1) This device may not cause harmful interference；
1814
1815 (2) this device must accept any interference received, including interference that may cause undesired operation.