Version 178.1 by Bei Jinggeng on 2022/06/28 15:01
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9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
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11 {{toc/}}
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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 == 1.3 Specification ==
64
65
66 **Built-in Temperature Sensor:**
67
68 * Resolution: 0.01 °C
69 * Accuracy Tolerance : Typ ±0.3 °C
70 * Long Term Drift: < 0.02 °C/yr
71 * Operating Range: -40 ~~ 85 °C
72
73 **Built-in Humidity Sensor:**
74
75 * Resolution: 0.04 %RH
76 * Accuracy Tolerance : Typ ±3 %RH
77 * Long Term Drift: < 0.02 °C/yr
78 * Operating Range: 0 ~~ 96 %RH
79
80 **External Temperature Sensor:**
81
82 * Resolution: 0.0625 °C
83 * ±0.5°C accuracy from -10°C to +85°C
84 * ±2°C accuracy from -55°C to +125°C
85 * Operating Range: -55 °C ~~ 125 °C
86
87
88
89 = 2. Connect LHT65N to IoT Server =
90
91 == 2.1 How does LHT65N work? ==
92
93 (((
94 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.
95 )))
96
97 (((
98 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.
99 )))
100
101
102 == 2.2 How to Activate LHT65N? ==
103
104 (((
105 The LHT65N has two working modes:
106 )))
107
108 * (((
109 (% 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.
110 )))
111 * (((
112 (% 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. 
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114
115 (((
116 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
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118
119
120 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
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122 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
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124
125
126 == 2.3 Example to join LoRaWAN network ==
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128 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
129 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.
130
131 (% _mstvisible="1" class="wikigeneratedid" %)
132 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
133
134
135 (((
136 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:
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138
139
140
141 === 2.3.1 Step 1: Create Device n TTN ===
142
143 (((
144 Create a device in TTN V3 with the OTAA keys from LHT65N.
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146
147 (((
148 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
149 )))
150
151 [[image:image-20220617150003-1.jpeg]]
152
153 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
154
155 Add APP EUI in the application.
156
157
158 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
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161 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
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163
164 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
165
166
167 Note: LHT65N use same payload as LHT65.
168
169
170 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
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172
173 Input APP EUI,  APP KEY and DEV EUI:
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175
176 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
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178
179
180
181 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
182
183 (((
184 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.
185 )))
186
187 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
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189
190
191
192 == 2.4 Uplink Payload ==
193
194 (((
195 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.
196 )))
197
198 (((
199 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
200 )))
201
202 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:426px" %)
203 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 97px;" %)(% _mstvisible="5" %)
204 (((
205 (% _mstvisible="6" %)
206 (% _msthash="1817478" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
207 )))|=(% _mstvisible="4" style="width: 39px;" %)(% _mstvisible="5" %)
208 (((
209 (% _mstvisible="6" %)
210 (% _msthash="1817479" _msttexthash="4550" _mstvisible="8" %)**2**
211 )))|=(% _mstvisible="4" style="width: 100px;" %)(% _mstvisible="5" %)
212 (((
213 (% _mstvisible="6" %)
214 (% _msthash="1817480" _msttexthash="4550" _mstvisible="8" %)**2**
215 )))|=(% _mstvisible="4" style="width: 77px;" %)(% _mstvisible="5" %)
216 (((
217 (% _mstvisible="6" %)
218 (% _msthash="1817481" _msttexthash="4550" _mstvisible="8" %)**2**
219 )))|=(% _mstvisible="4" style="width: 47px;" %)(% _mstvisible="5" %)
220 (((
221 (% _mstvisible="6" %)
222 (% _msthash="1817482" _msttexthash="4459" _mstvisible="8" %)**1**
223 )))|=(% _mstvisible="4" style="width: 51px;" %)(% _mstvisible="5" %)
224 (((
225 (% _mstvisible="6" %)
226 (% _msthash="1817483" _msttexthash="4732" _mstvisible="8" %)**4**
227 )))
228 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:97px" %)(% _mstvisible="5" %)
229 (((
230 (% _mstvisible="6" %)
231 (% _msthash="1817484" _msttexthash="60203" _mstvisible="8" %)**Value**
232 )))|(% _mstvisible="4" style="width:39px" %)(% _mstvisible="5" %)
233 (((
234 (% _mstvisible="6" %)
235 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo" _msthash="1817485" _msttexthash="22594" _mstvisible="7"]]
236 )))|(% _mstvisible="4" style="width:100px" %)(% _mstvisible="5" %)
237 (((
238 (% _mstvisible="6" %)
239 (((
240 (% _mstvisible="7" %)
241 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224742" _msttexthash="405769" _mstvisible="8"]]
242 )))
243 )))|(% _mstvisible="4" style="width:77px" %)(% _mstvisible="5" %)
244 (((
245 (% _mstvisible="6" %)
246 (((
247 (% _mstvisible="7" %)
248 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2224743" _msttexthash="105872" _mstvisible="8"]]
249 )))
250
251 (% _mstvisible="6" %)
252 (((
253 (% _mstvisible="7" %)
254 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224744" _msttexthash="117429" _mstvisible="8"]]
255 )))
256 )))|(% _mstvisible="4" style="width:47px" %)(% _mstvisible="5" %)
257 (((
258 (% _mstvisible="6" %)
259 [[Ext>>||anchor="H2.4.5Ext23" _msthash="1817486" _msttexthash="32331" _mstvisible="7"]] #
260 )))|(% _mstvisible="4" style="width:51px" %)(% _mstvisible="5" %)
261 (((
262 (% _mstvisible="6" %)
263 [[Ext value>>||anchor="H2.4.6Extvalue" _msthash="1817487" _msttexthash="116545" _mstvisible="7"]]
264 )))
265
266 * The First 6 bytes: has fix meanings for every LHT65N.
267 * The 7th byte (EXT #): defines the external sensor model.
268 * 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.)
269
270
271 === 2.4.1 Decoder in TTN V3 ===
272
273 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.
274
275 Below is the position to put the decoder and LHT65N decoder can be download from here:
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277
278 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0||_msthash="315253" _msttexthash="3509064" _mstvisible="2"]]
279
280
281 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
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283
284
285
286 === 2.4.2 BAT-Battery Info ===
287
288 These two bytes of BAT include the battery state and the actually voltage
289
290 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
291
292
293 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
294
295
296 Check the battery voltage for LHT65N.
297
298 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
299 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
300
301
302 === 2.4.3 Built-in Temperature ===
303
304 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
305
306 * Temperature:  0x0ABB/100=27.47℃
307
308 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
309
310 * Temperature:  (0xF5C6-65536)/100=-26.18℃
311
312
313 === 2.4.4 Built-in Humidity ===
314
315 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
316
317 * Humidity:    0x025C/10=60.4%
318
319
320 === 2.4.5 Ext # ===
321
322 Bytes for External Sensor:
323
324 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
325
326
327
328 === 2.4.6 Ext value ===
329
330 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
331
332
333 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
334
335
336 * DS18B20 temp=0x0ADD/100=27.81℃
337
338 The last 2 bytes of data are meaningless
339
340 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
341
342
343 * External temperature= (0xF54F-65536)/100=-27.37℃
344
345 The last 2 bytes of data are meaningless
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347 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
348
349
350
351 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
352
353 (((
354 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:
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356
357 (((
358
359 )))
360
361 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
362 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 96px;" %)(% _mstvisible="5" %)
363 (((
364 (% _mstvisible="6" %)
365 (% _msthash="1817488" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
366 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
367 (((
368 (% _mstvisible="6" %)
369 (% _msthash="1817489" _msttexthash="4550" _mstvisible="8" %)**2**
370 )))|=(% _mstvisible="4" style="width: 99px;" %)(% _mstvisible="5" %)
371 (((
372 (% _mstvisible="6" %)
373 (% _msthash="1817490" _msttexthash="4550" _mstvisible="8" %)**2**
374 )))|=(% _mstvisible="4" style="width: 132px;" %)(% _mstvisible="5" %)
375 (((
376 (% _mstvisible="6" %)
377 (% _msthash="1817491" _msttexthash="4550" _mstvisible="8" %)**2**
378 )))|=(% _mstvisible="4" style="width: 54px;" %)(% _mstvisible="5" %)
379 (((
380 (% _mstvisible="6" %)
381 (% _msthash="1817492" _msttexthash="4459" _mstvisible="8" %)**1**
382 )))|=(% _mstvisible="4" style="width: 64px;" %)(% _mstvisible="5" %)
383 (((
384 (% _mstvisible="6" %)
385 (% _msthash="1817493" _msttexthash="4732" _mstvisible="8" %)**4**
386 )))
387 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:96px" %)(% _mstvisible="5" %)
388 (((
389 (% _mstvisible="6" %)
390 (% _msthash="1817494" _msttexthash="60203" _mstvisible="8" %)**Value**
391 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
392 (((
393 (% _mstvisible="6" %)
394 [[External temperature>>||anchor="H4.2SetExternalSensorMode" _msthash="1817495" _msttexthash="426517" _mstvisible="7"]]
395 )))|(% _mstvisible="4" style="width:99px" %)(% _mstvisible="5" %)
396 (((
397 (% _mstvisible="6" %)
398 (((
399 (% _mstvisible="7" %)
400 [[Built-In>>||anchor="H2.4.3Built-inTemperature" _msthash="2224745" _msttexthash="100464" _mstvisible="8"]]
401 )))
402
403 (% _mstvisible="6" %)
404 (((
405 (% _mstvisible="7" %)
406 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224746" _msttexthash="184041" _mstvisible="8"]]
407 )))
408 )))|(% _mstvisible="4" style="width:132px" %)(% _mstvisible="5" %)
409 (((
410 (% _mstvisible="6" %)
411 (((
412 (% _msthash="2224747" _msttexthash="136331" _mstvisible="7" %)
413 BAT Status &
414 )))
415
416 (% _mstvisible="6" %)
417 (((
418 (% _mstvisible="7" %)
419 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224748" _msttexthash="311181" _mstvisible="8"]]
420 )))
421 )))|(% _mstvisible="4" style="width:54px" %)(% _mstvisible="5" %)
422 (((
423 (% _msthash="1817496" _msttexthash="147225" _mstvisible="6" %)
424 Status & Ext
425 )))|(% _mstvisible="4" style="width:64px" %)(% _mstvisible="5" %)
426 (((
427 (% _mstvisible="6" %)
428 (((
429 (% _mstvisible="7" %)
430 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2224749" _msttexthash="227175" _mstvisible="8"]]
431 )))
432 )))
433
434 (% _mstvisible="1" %)
435 * (% _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**
436
437 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
438 (% _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]
439 (% _mstvisible="3" %)|(% _msthash="1230921" _msttexthash="60203" _mstvisible="4" style="width:65px" %)Value|(% _mstvisible="4" style="width:267px" %)(% _mstvisible="5" %)
440 (((
441 (% _msthash="1817497" _msttexthash="128427" _mstvisible="6" %)
442 BAT Status
443
444 (% _msthash="1817498" _msttexthash="472784" _mstvisible="6" %)
445 00(b): Ultra Low ( BAT <= 2.50v)
446
447 (% _msthash="1817499" _msttexthash="483678" _mstvisible="6" %)
448 01(b): Low  (2.50v <=BAT <= 2.55v)
449
450 (% _msthash="1817500" _msttexthash="440791" _mstvisible="6" %)
451 10(b): OK   (2.55v <= BAT <=2.65v)
452
453 (% _msthash="1817501" _msttexthash="334191" _mstvisible="6" %)
454 11(b): Good   (BAT >= 2.65v)
455 )))|(% _mstvisible="4" style="width:134px" %)(% _mstvisible="5" %)
456 (((
457 (% _mstvisible="6" %)
458 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="1817502" _msttexthash="311181" _mstvisible="7"]]
459
460 (% _mstvisible="6" %)
461
462 )))
463
464 * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
465
466 [[image:image-20220523152434-16.png||_mstalt="453921" _mstvisible="3"]]
467
468 * Poll Message Flag:  1: This message is a poll message reply, 0: means this is a normal uplink.
469 * 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.
470 * 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)
471
472
473 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
474
475 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
476
477 be used to power the external ADC sensor; user can control the power on time for this
478
479 sensor by setting:
480
481 AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
482
483
484
485 == 2.5 Show data on Datacake ==
486
487 (((
488 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:
489 )))
490
491 (((
492
493 )))
494
495 (((
496 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
497 )))
498
499 (((
500 (% 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.
501 )))
502
503 (((
504
505 )))
506
507 (((
508 Add Datacake:
509 )))
510
511
512 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
513
514
515
516 Select default key as Access Key:
517
518
519 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
520
521
522 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
523
524
525 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
526
527
528 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
529
530
531
532 == 2.6 Datalog Feature ==
533
534 (((
535 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.
536 )))
537
538
539
540 === 2.6.1 Ways to get datalog via LoRaWAN ===
541
542 There are two methods:
543
544 1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
545 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.
546
547
548 === 2.6.2 Unix TimeStamp ===
549
550
551 LHT65N uses Unix TimeStamp format based on
552
553
554 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
555
556
557
558 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
559
560 Below is the converter example
561
562 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
563
564 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
565
566
567
568 === 2.6.3 Set Device Time ===
569
570 (((
571 There are two ways to set device's time:
572 )))
573
574 (((
575 **~1. Through LoRaWAN MAC Command (Default settings)**
576 )))
577
578 (((
579 User need to set SYNCMOD=1 to enable sync time via MAC command.
580 )))
581
582 (((
583 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).
584 )))
585
586 (((
587 (% 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.
588 )))
589
590 (((
591
592 )))
593
594 (((
595 **2. Manually Set Time**
596 )))
597
598 (((
599 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
600 )))
601
602
603
604 === 2.6.4 Poll sensor value ===
605
606 User can poll sensor value based on timestamps from the server. Below is the downlink command.
607
608 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
609
610
611 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.
612
613 For example, downlink command **31 5FC5F350 5FC6 0160 05**
614
615 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
616
617 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
618
619
620
621 === 2.6.5 Datalog Uplink payload ===
622
623 (% _msthash="315267" _msttexthash="2245087" _mstvisible="1" %)
624 The Datalog poll reply uplink will use below payload format.
625
626 (% _mstvisible="1" %)
627 (((
628 (% _mstvisible="2" %)
629 (% _msthash="506080" _msttexthash="451581" _mstvisible="4" %)**Retrieval data payload**
630 )))
631
632 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
633 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 93px;" %)(% _mstvisible="5" %)
634 (((
635 (% _mstvisible="6" %)
636 (((
637 (% _mstvisible="7" %)
638 (% _msthash="2224750" _msttexthash="161122" _mstvisible="9" %)**Size(bytes)**
639 )))
640 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
641 (((
642 (% _mstvisible="6" %)
643 (((
644 (% _mstvisible="7" %)
645 (% _msthash="2224751" _msttexthash="4550" _mstvisible="9" %)**2**
646 )))
647 )))|=(% _mstvisible="4" style="width: 102px;" %)(% _mstvisible="5" %)
648 (((
649 (% _mstvisible="6" %)
650 (((
651 (% _mstvisible="7" %)
652 (% _msthash="2224752" _msttexthash="4550" _mstvisible="9" %)**2**
653 )))
654 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
655 (((
656 (% _mstvisible="6" %)
657 (((
658 (% _mstvisible="7" %)
659 (% _msthash="2224753" _msttexthash="4550" _mstvisible="9" %)**2**
660 )))
661 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
662 (((
663 (% _mstvisible="6" %)
664 (((
665 (% _mstvisible="7" %)
666 (% _msthash="2224754" _msttexthash="4459" _mstvisible="9" %)**1**
667 )))
668 )))|=(% _mstvisible="4" style="width: 48px;" %)(% _mstvisible="5" %)
669 (((
670 (% _mstvisible="6" %)
671 (((
672 (% _mstvisible="7" %)
673 (% _msthash="2224755" _msttexthash="4732" _mstvisible="9" %)**4**
674 )))
675 )))
676 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:93px" %)(% _mstvisible="5" %)
677 (((
678 (% _mstvisible="6" %)
679 (((
680 (% _mstvisible="7" %)
681 (% _msthash="2224756" _msttexthash="60203" _mstvisible="9" %)**Value**
682 )))
683 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
684 (((
685 (% _mstvisible="6" %)
686 (((
687 (% _mstvisible="7" %)
688 [[External sensor data>>||anchor="H2.4.6Extvalue" _msthash="2224757" _msttexthash="386672" _mstvisible="8"]]
689 )))
690 )))|(% _mstvisible="4" style="width:102px" %)(% _mstvisible="5" %)
691 (((
692 (% _mstvisible="6" %)
693 (((
694 (% _mstvisible="7" %)
695 (((
696 (% _mstvisible="8" %)
697 [[Built In>>||anchor="H2.4.3Built-inTemperature" _msthash="2671864" _msttexthash="91065" _mstvisible="9"]]
698 )))
699 )))
700
701 (% _mstvisible="6" %)
702 (((
703 (% _mstvisible="7" %)
704 (((
705 (% _mstvisible="8" %)
706 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2671865" _msttexthash="184041" _mstvisible="9"]]
707 )))
708 )))
709 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
710 (((
711 (% _mstvisible="6" %)
712 (((
713 (% _mstvisible="7" %)
714 (((
715 (% _mstvisible="8" %)
716 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2671866" _msttexthash="105872" _mstvisible="9"]]
717 )))
718 )))
719
720 (% _mstvisible="6" %)
721 (((
722 (% _mstvisible="7" %)
723 (((
724 (% _mstvisible="8" %)
725 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2671867" _msttexthash="117429" _mstvisible="9"]]
726 )))
727 )))
728 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
729 (((
730 (% _mstvisible="6" %)
731 (((
732 (% _msthash="2224758" _msttexthash="390390" _mstvisible="7" %)
733 Poll message flag & Ext
734 )))
735 )))|(% _mstvisible="4" style="width:48px" %)(% _mstvisible="5" %)
736 (((
737 (% _mstvisible="6" %)
738 (((
739 (% _mstvisible="7" %)
740 (((
741 (% _mstvisible="8" %)
742 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2671868" _msttexthash="227175" _mstvisible="9"]]
743 )))
744 )))
745
746 (% _mstvisible="6" %)
747 (((
748 (% _mstvisible="7" %)
749 (((
750 (% _mstvisible="8" %)
751
752 )))
753 )))
754 )))
755
756 (% _mstvisible="1" %)
757 (% _msthash="315268" _msttexthash="390390" _mstvisible="3" %)**Poll message flag & Ext**
758
759 (% _mstvisible="1" %)
760 [[image:image-20220523152208-14.png||_mstalt="452920" _mstvisible="3"]]
761
762 (% _mstvisible="1" %)
763 (((
764 (% _mstvisible="2" %)
765 (((
766 (% _msthash="736723" _msttexthash="2005003" _mstvisible="3" %)
767 (((
768 Poll Message Flag: 1: This message is a poll message reply.
769 )))
770 )))
771 )))
772
773 (% _mstvisible="1" %)
774 * (% _mstvisible="3" %)
775 (((
776 (% _mstvisible="4" %)
777 (((
778 (% _msthash="1197157" _msttexthash="561548" _mstvisible="5" %)
779 (((
780 Poll Message Flag is set to 1.
781 )))
782 )))
783 )))
784 * (% _mstvisible="3" %)
785 (((
786 (% _mstvisible="4" %)
787 (((
788 (% _msthash="1197158" _msttexthash="9284964" _mstvisible="5" %)
789 (((
790 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
791 )))
792 )))
793 )))
794
795 (% _mstvisible="1" %)
796 (((
797 (% _mstvisible="2" %)
798 (((
799 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
800 (((
801
802 )))
803
804 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
805 (((
806 For example, in US915 band, the max payload for different DR is:
807 )))
808 )))
809 )))
810
811 (% _mstvisible="1" %)
812 (((
813 (% _mstvisible="2" %)
814 (((
815 (% _msthash="736725" _msttexthash="1065532" _mstvisible="3" %)
816 (((
817 a) DR0: max is 11 bytes so one entry of data
818 )))
819 )))
820 )))
821
822 (% _mstvisible="1" %)
823 (((
824 (% _mstvisible="2" %)
825 (((
826 (% _msthash="736726" _msttexthash="3265665" _mstvisible="3" %)
827 (((
828 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
829 )))
830 )))
831 )))
832
833 (% _mstvisible="1" %)
834 (((
835 (% _mstvisible="2" %)
836 (((
837 (% _msthash="736727" _msttexthash="1454115" _mstvisible="3" style="text-align: left;" %)
838 (((
839 c) DR2: total payload includes 11 entries of data
840 )))
841 )))
842 )))
843
844 (% _mstvisible="1" %)
845 (((
846 (% _mstvisible="2" %)
847 (((
848 (% _msthash="736728" _msttexthash="1483924" _mstvisible="3" style="text-align: left;" %)
849 (((
850 d) DR3: total payload includes 22 entries of data.
851 )))
852 )))
853 )))
854
855 (% _mstvisible="1" %)
856 (((
857 (% _mstvisible="2" %)
858 (((
859 (% _msthash="736729" _msttexthash="5848349" _mstvisible="3" style="text-align: left;" %)
860 (((
861 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
862 )))
863 )))
864 )))
865
866
867 (% _mstvisible="1" style="text-align: left;" %)
868 (% _msthash="315269" _msttexthash="104767" _mstvisible="3" %)**Example:**
869
870 (% _msthash="315270" _msttexthash="913822" _mstvisible="1" style="text-align: left;" %)
871 If LHT65N has below data inside Flash:
872
873 (% _mstvisible="1" %)
874 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
875
876 (% _mstvisible="1" %)
877 (((
878 (% _msthash="506081" _msttexthash="1663961" _mstvisible="2" style="text-align: left;" %)
879 If user sends below downlink command: (% _mstvisible="3" style="background-color:yellow" %)3160065F9760066DA705
880 )))
881
882 (% _mstvisible="1" %)
883 (((
884 (% _msthash="506082" _msttexthash="1092494" _mstvisible="2" style="text-align: left;" %)
885 Where : Start time: 60065F97 = time 21/1/19 04:27:03
886 )))
887
888 (% _mstvisible="1" %)
889 (((
890 (% _msthash="506083" _msttexthash="737269" _mstvisible="2" style="text-align: left;" %)
891 Stop time 60066DA7= time 21/1/19 05:27:(% _msthash="903005" _msttexthash="9672" _mstvisible="2" %)03
892 )))
893
894 (% _mstvisible="1" %)
895 (((
896 (% _mstvisible="2" %)
897
898 )))
899
900 (% _mstvisible="1" %)
901 (((
902 (% _msthash="506084" _msttexthash="751218" _mstvisible="2" style="text-align: left;" %)
903 LHT65N will uplink this payload.
904 )))
905
906 (% _mstvisible="1" %)
907 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
908
909 (% _msthash="315271" _msttexthash="12012546" _mstvisible="1" style="text-align: left;" %)
910 (((
911 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
912 )))
913
914 (% _msthash="315237" _msttexthash="1385839" %)
915 (((
916 Where the first 11 bytes is for the first entry:
917 )))
918
919 (% _msthash="315238" _msttexthash="274846" %)
920 (((
921 7FFF089801464160065F97
922 )))
923
924 (% _msthash="315239" _msttexthash="617435" %)
925 (((
926 Ext sensor data=0x7FFF/100=327.67
927 )))
928
929 (% _msthash="315240" _msttexthash="270543" %)
930 (((
931 Temp=0x0898/100=22.00
932 )))
933
934 (% _msthash="315241" _msttexthash="211783" %)
935 (((
936 Hum=0x0146/10=32.6
937 )))
938
939 (% _msthash="315242" _msttexthash="1569776" %)
940 (((
941 poll message flag & Ext=0x41,means reply data,Ext=1
942 )))
943
944 (% _msthash="315243" _msttexthash="1120509" %)
945 (((
946 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
947 )))
948
949
950
951 == 2.7 Alarm Mode ==
952
953 (((
954 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.
955 )))
956
957 (((
958 (% style="color:red" %)Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.
959 )))
960
961 (((
962 **AT COMMAND FOR ALARM MODE:**
963 )))
964
965 (% _mstvisible="1" class="box infomessage" %)
966 (((
967 (((
968 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled)
969 )))
970
971 (((
972 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
973 )))
974
975 (((
976 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
977 )))
978
979 (((
980 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
981 )))
982
983 (((
984 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
985 )))
986 )))
987
988
989
990 == 2.8 LED Indicator ==
991
992 The LHT65 has a triple color LED which for easy showing different stage .
993
994 While user press ACT button, the LED will work as per LED status with ACT button.
995
996 In a normal working state:
997
998 * For each uplink, the BLUE LED or RED LED will blink once.
999 BLUE LED when external sensor is connected.
1000 * RED LED when external sensor is not connected
1001 * For each success downlink, the PURPLE LED will blink once
1002
1003
1004 == 2.9 installation ==
1005
1006 (% _mstvisible="1" %)
1007 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
1008
1009
1010
1011 = 3. Sensors and Accessories =
1012
1013 == 3.1 E2 Extension Cable ==
1014
1015 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
1016
1017 **1m long breakout cable for LHT65N. Features:**
1018
1019 * (((
1020 Use for AT Command， works for both LHT52/LHT65N
1021 )))
1022 * (((
1023 Update firmware for LHT65N, works for both LHT52/LHT65N
1024 )))
1025 * (((
1026 Supports ADC mode to monitor external ADC
1027 )))
1028 * (((
1029 Supports Interrupt mode
1030 )))
1031 * (((
1032 Exposed All pins from the LHT65N Type-C connector.
1033 )))
1034
1035 [[image:image-20220619092421-3.png||height="371" width="529"]]
1036
1037
1038
1039
1040 == 3.2 E3 Temperature Probe ==
1041
1042
1043 [[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"]]
1044
1045
1046 Temperature sensor with 2 meters cable long
1047
1048 * Resolution: 0.0625 °C
1049 * ±0.5°C accuracy from -10°C to +85°C
1050 * ±2°C accuracy from -55°C to +125°C
1051 * Operating Range: -40 ~~ 125 °C
1052 * Working voltage 2.35v ~~ 5v
1053
1054
1055 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1056
1057 (((
1058 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1059 )))
1060
1061 * (((
1062 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1063 )))
1064
1065 * (((
1066 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1067 )))
1068
1069 (((
1070 There are two kinds of commands to configure LHT65N, they are:
1071 )))
1072
1073 * (((
1074 (% style="color:#4f81bd" %)**General Commands**.
1075 )))
1076
1077 (((
1078 These commands are to configure:
1079 )))
1080
1081 1. (((
1082 General system settings like: uplink interval.
1083 )))
1084 1. (((
1085 LoRaWAN protocol & radio-related commands.
1086 )))
1087
1088 (((
1089 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]]
1090 )))
1091
1092 * (((
1093 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1094 )))
1095
1096 (((
1097 These commands are only valid for LHT65N, as below:
1098 )))
1099
1100
1101 == 4.1 Set Transmit Interval Time ==
1102
1103 Feature: Change LoRaWAN End Node Transmit Interval.
1104
1105 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1106
1107 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
1108
1109
1110 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1111
1112 Format: Command Code (0x01) followed by 3 bytes time value.
1113
1114 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1115
1116 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1117
1118 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1119
1120
1121 == 4.2 Set External Sensor Mode ==
1122
1123 Feature: Change External Sensor Mode.
1124
1125 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1126
1127 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1128
1129
1130 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1131
1132 Total bytes: 2 ~~ 5 bytes
1133
1134 **Example:**
1135
1136 * 0xA201: Set external sensor type to E1
1137
1138 * 0xA209: Same as AT+EXT=9
1139
1140 * 0xA20702003c: Same as AT+SETCNT=60
1141
1142
1143 == 4.3 Enable/Disable uplink Temperature probe ID ==
1144
1145 (((
1146 Feature: If PID is enabled, device will send the temperature probe ID on:
1147 )))
1148
1149 * (((
1150 First Packet after OTAA Join
1151 )))
1152 * (((
1153 Every 24 hours since the first packet.
1154 )))
1155
1156 (((
1157 PID is default set to disable (0)
1158 )))
1159
1160 (% style="color:#4f81bd" %)**AT Command:**
1161
1162 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1163
1164
1165 (% style="color:#4f81bd" %)**Downlink Command:**
1166
1167 * **0xA800**  **~-~->** AT+PID=0
1168 * **0xA801**     **~-~->** AT+PID=1
1169
1170
1171 == 4.4 Set Password ==
1172
1173 Feature: Set device password, max 9 digits
1174
1175 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1176
1177 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1178
1179
1180 (% style="color:#4f81bd" %)**Downlink Command:**
1181
1182 No downlink command for this feature.
1183
1184
1185
1186 == 4.5 Quit AT Command ==
1187
1188 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1189
1190 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1191
1192 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1193
1194
1195 (% style="color:#4f81bd" %)**Downlink Command:**
1196
1197 No downlink command for this feature.
1198
1199
1200
1201 == 4.6 Set to sleep mode ==
1202
1203 Feature: Set device to sleep mode
1204
1205 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1206 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1207
1208 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1209
1210 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1211
1212
1213 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1214
1215 * There is no downlink command to set to Sleep mode.
1216
1217
1218 == 4.7 Set system time ==
1219
1220 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1221
1222 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1223
1224 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1225
1226
1227 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1228
1229 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1230
1231
1232
1233 == 4.8 Set Time Sync Mode ==
1234
1235 (((
1236 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1237 )))
1238
1239 (((
1240 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.
1241 )))
1242
1243 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1244
1245 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1246
1247
1248 (% style="color:#4f81bd" %)**Downlink Command:**
1249
1250 0x28 01 ~/~/ Same As AT+SYNCMOD=1
1251 0x28 00 ~/~/ Same As AT+SYNCMOD=0
1252
1253
1254
1255 == 4.9 Set Time Sync Interval ==
1256
1257 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1258
1259 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1260
1261 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1262
1263
1264 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1265
1266 **0x29 0A** ~/~/ Same as AT+SYNCTDC=0x0A
1267
1268
1269
1270 == 4.10 Print data entries base on page. ==
1271
1272 Feature: Print the sector data from start page to stop page (max is 416 pages).
1273
1274 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1275
1276 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1277
1278
1279 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1280
1281 No downlink commands for feature
1282
1283
1284
1285 == 4.11 Print last few data entries. ==
1286
1287 Feature: Print the last few data entries
1288
1289 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1290
1291 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1292
1293
1294 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1295
1296 No downlink commands for feature
1297
1298
1299
1300 == 4.12 Clear Flash Record ==
1301
1302 Feature: Clear flash storage for data log feature.
1303
1304
1305 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1306
1307 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1308
1309
1310 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1311
1312 * Example: 0xA301 ~/~/Same as AT+CLRDTA
1313
1314
1315 == 4.13 Auto Send None-ACK messages ==
1316
1317 (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
1318 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.
1319
1320 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1321
1322 (% _msthash="315396" _msttexthash="734682" _mstvisible="1" %)
1323 The default factory setting is 0
1324
1325 (% _mstvisible="1" border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1326 (% _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**
1327 (% _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
1328
1329 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1330
1331 * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
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 = 8. Packing Info =
1788
1789
1790 **Package Includes**:
1791
1792 * LHT65N Temperature & Humidity Sensor x 1
1793 * Optional external sensor
1794
1795 **Dimension and weight**:
1796
1797 * Device Size:  10 x 10 x 3.5 cm
1798 * Device Weight: 120.5g
1799
1800
1801 = 9. Reference material =
1802
1803 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1804
1805
1806 = 10. FCC Warning =
1807
1808 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1809
1810 (1) This device may not cause harmful interference；
1811
1812 (2) this device must accept any interference received, including interference that may cause undesired operation.

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