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Version 170.27 by Xiaoling on 2022/06/22 11:17
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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 == 1.3 Specification ==
63
64
65 **Built-in Temperature Sensor:**
66
67 * Resolution: 0.01 °C
68 * Accuracy Tolerance : Typ ±0.3 °C
69 * Long Term Drift: < 0.02 °C/yr
70 * Operating Range: -40 ~~ 85 °C
71
72 **Built-in Humidity Sensor:**
73
74 * Resolution: 0.04 %RH
75 * Accuracy Tolerance : Typ ±3 %RH
76 * Long Term Drift: < 0.02 °C/yr
77 * Operating Range: 0 ~~ 96 %RH
78
79 **External Temperature Sensor:**
80
81 * Resolution: 0.0625 °C
82 * ±0.5°C accuracy from -10°C to +85°C
83 * ±2°C accuracy from -55°C to +125°C
84 * Operating Range: -55 °C ~~ 125 °C
85
86
87
88 = 2. Connect LHT65N to IoT Server =
89
90 == 2.1 How does LHT65N work? ==
91
92 (((
93 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.
94 )))
95
96 (((
97 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.
98 )))
99
100
101 == 2.2 How to Activate LHT65N? ==
102
103 (((
104 The LHT65N has two working modes:
105 )))
106
107 * (((
108 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn’t have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
109 )))
110 * (((
111 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
112 )))
113
114 (((
115 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
116 )))
117
118
119 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
120
121 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
122
123
124
125 == 2.3 Example to join LoRaWAN network ==
126
127 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
128 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.
129
130 (% _mstvisible="1" class="wikigeneratedid" %)
131 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
132
133
134 (((
135 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:
136 )))
137
138
139
140 === 2.3.1 Step 1: Create Device n TTN ===
141
142 (((
143 Create a device in TTN V3 with the OTAA keys from LHT65N.
144 )))
145
146 (((
147 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
148 )))
149
150 [[image:image-20220617150003-1.jpeg]]
151
152 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
153
154 Add APP EUI in the application.
155
156
157 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
158
159
160 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
161
162
163 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
164
165
166 Note: LHT65N use same payload as LHT65.
167
168
169 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
170
171
172 Input APP EUI,  APP KEY and DEV EUI:
173
174
175 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
176
177
178
179
180 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
181
182 (((
183 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.
184 )))
185
186 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
187
188
189
190
191 == 2.4 Uplink Payload ==
192
193 (((
194 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.
195 )))
196
197 (((
198 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
199 )))
200
201 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:426px" %)
202 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 97px;" %)(% _mstvisible="5" %)
203 (((
204 (% _mstvisible="6" %)
205 (% _msthash="1817478" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
206 )))|=(% _mstvisible="4" style="width: 39px;" %)(% _mstvisible="5" %)
207 (((
208 (% _mstvisible="6" %)
209 (% _msthash="1817479" _msttexthash="4550" _mstvisible="8" %)**2**
210 )))|=(% _mstvisible="4" style="width: 100px;" %)(% _mstvisible="5" %)
211 (((
212 (% _mstvisible="6" %)
213 (% _msthash="1817480" _msttexthash="4550" _mstvisible="8" %)**2**
214 )))|=(% _mstvisible="4" style="width: 77px;" %)(% _mstvisible="5" %)
215 (((
216 (% _mstvisible="6" %)
217 (% _msthash="1817481" _msttexthash="4550" _mstvisible="8" %)**2**
218 )))|=(% _mstvisible="4" style="width: 47px;" %)(% _mstvisible="5" %)
219 (((
220 (% _mstvisible="6" %)
221 (% _msthash="1817482" _msttexthash="4459" _mstvisible="8" %)**1**
222 )))|=(% _mstvisible="4" style="width: 51px;" %)(% _mstvisible="5" %)
223 (((
224 (% _mstvisible="6" %)
225 (% _msthash="1817483" _msttexthash="4732" _mstvisible="8" %)**4**
226 )))
227 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:97px" %)(% _mstvisible="5" %)
228 (((
229 (% _mstvisible="6" %)
230 (% _msthash="1817484" _msttexthash="60203" _mstvisible="8" %)**Value**
231 )))|(% _mstvisible="4" style="width:39px" %)(% _mstvisible="5" %)
232 (((
233 (% _mstvisible="6" %)
234 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo" _msthash="1817485" _msttexthash="22594" _mstvisible="7"]]
235 )))|(% _mstvisible="4" style="width:100px" %)(% _mstvisible="5" %)
236 (((
237 (% _mstvisible="6" %)
238 (((
239 (% _mstvisible="7" %)
240 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224742" _msttexthash="405769" _mstvisible="8"]]
241 )))
242 )))|(% _mstvisible="4" style="width:77px" %)(% _mstvisible="5" %)
243 (((
244 (% _mstvisible="6" %)
245 (((
246 (% _mstvisible="7" %)
247 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2224743" _msttexthash="105872" _mstvisible="8"]]
248 )))
249
250 (% _mstvisible="6" %)
251 (((
252 (% _mstvisible="7" %)
253 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224744" _msttexthash="117429" _mstvisible="8"]]
254 )))
255 )))|(% _mstvisible="4" style="width:47px" %)(% _mstvisible="5" %)
256 (((
257 (% _mstvisible="6" %)
258 [[Ext>>||anchor="H2.4.5Ext23" _msthash="1817486" _msttexthash="32331" _mstvisible="7"]] #
259 )))|(% _mstvisible="4" style="width:51px" %)(% _mstvisible="5" %)
260 (((
261 (% _mstvisible="6" %)
262 [[Ext value>>||anchor="H2.4.6Extvalue" _msthash="1817487" _msttexthash="116545" _mstvisible="7"]]
263 )))
264
265 * The First 6 bytes: has fix meanings for every LHT65N.
266 * The 7th byte (EXT #): defines the external sensor model.
267 * 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.)
268
269 === 2.4.1 Decoder in TTN V3 ===
270
271 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.
272
273 Below is the position to put the decoder and LHT65N decoder can be download from here:
274
275
276 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0||_msthash="315253" _msttexthash="3509064" _mstvisible="2"]]
277
278
279 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
280
281
282
283
284 === 2.4.2 BAT-Battery Info ===
285
286 These two bytes of BAT include the battery state and the actually voltage
287
288 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
289
290
291 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
292
293
294 Check the battery voltage for LHT65N.
295
296 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
297 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
298
299 === 2.4.3 Built-in Temperature ===
300
301 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
302
303 * Temperature:  0x0ABB/100=27.47℃
304
305 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
306
307 * Temperature:  (0xF5C6-65536)/100=-26.18℃
308
309 === 2.4.4 Built-in Humidity ===
310
311 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
312
313 * Humidity:    0x025C/10=60.4%
314
315 === 2.4.5 Ext # ===
316
317 Bytes for External Sensor:
318
319 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
320
321
322
323 === 2.4.6 Ext value ===
324
325 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
326
327
328 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
329
330
331 * DS18B20 temp=0x0ADD/100=27.81℃
332
333 The last 2 bytes of data are meaningless
334
335 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
336
337
338 * External temperature= (0xF54F-65536)/100=-27.37℃
339
340 The last 2 bytes of data are meaningless
341
342 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
343
344
345
346 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
347
348 (((
349 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:
350 )))
351
352 (((
353
354 )))
355
356 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
357 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 96px;" %)(% _mstvisible="5" %)
358 (((
359 (% _mstvisible="6" %)
360 (% _msthash="1817488" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
361 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
362 (((
363 (% _mstvisible="6" %)
364 (% _msthash="1817489" _msttexthash="4550" _mstvisible="8" %)**2**
365 )))|=(% _mstvisible="4" style="width: 99px;" %)(% _mstvisible="5" %)
366 (((
367 (% _mstvisible="6" %)
368 (% _msthash="1817490" _msttexthash="4550" _mstvisible="8" %)**2**
369 )))|=(% _mstvisible="4" style="width: 132px;" %)(% _mstvisible="5" %)
370 (((
371 (% _mstvisible="6" %)
372 (% _msthash="1817491" _msttexthash="4550" _mstvisible="8" %)**2**
373 )))|=(% _mstvisible="4" style="width: 54px;" %)(% _mstvisible="5" %)
374 (((
375 (% _mstvisible="6" %)
376 (% _msthash="1817492" _msttexthash="4459" _mstvisible="8" %)**1**
377 )))|=(% _mstvisible="4" style="width: 64px;" %)(% _mstvisible="5" %)
378 (((
379 (% _mstvisible="6" %)
380 (% _msthash="1817493" _msttexthash="4732" _mstvisible="8" %)**4**
381 )))
382 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:96px" %)(% _mstvisible="5" %)
383 (((
384 (% _mstvisible="6" %)
385 (% _msthash="1817494" _msttexthash="60203" _mstvisible="8" %)**Value**
386 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
387 (((
388 (% _mstvisible="6" %)
389 [[External temperature>>||anchor="H4.2SetExternalSensorMode" _msthash="1817495" _msttexthash="426517" _mstvisible="7"]]
390 )))|(% _mstvisible="4" style="width:99px" %)(% _mstvisible="5" %)
391 (((
392 (% _mstvisible="6" %)
393 (((
394 (% _mstvisible="7" %)
395 [[Built-In>>||anchor="H2.4.3Built-inTemperature" _msthash="2224745" _msttexthash="100464" _mstvisible="8"]]
396 )))
397
398 (% _mstvisible="6" %)
399 (((
400 (% _mstvisible="7" %)
401 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224746" _msttexthash="184041" _mstvisible="8"]]
402 )))
403 )))|(% _mstvisible="4" style="width:132px" %)(% _mstvisible="5" %)
404 (((
405 (% _mstvisible="6" %)
406 (((
407 (% _msthash="2224747" _msttexthash="136331" _mstvisible="7" %)
408 BAT Status &
409 )))
410
411 (% _mstvisible="6" %)
412 (((
413 (% _mstvisible="7" %)
414 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224748" _msttexthash="311181" _mstvisible="8"]]
415 )))
416 )))|(% _mstvisible="4" style="width:54px" %)(% _mstvisible="5" %)
417 (((
418 (% _msthash="1817496" _msttexthash="147225" _mstvisible="6" %)
419 Status & Ext
420 )))|(% _mstvisible="4" style="width:64px" %)(% _mstvisible="5" %)
421 (((
422 (% _mstvisible="6" %)
423 (((
424 (% _mstvisible="7" %)
425 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2224749" _msttexthash="227175" _mstvisible="8"]]
426 )))
427 )))
428
429 (% _mstvisible="1" %)
430 * (% _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**
431
432 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
433 (% _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]
434 (% _mstvisible="3" %)|(% _msthash="1230921" _msttexthash="60203" _mstvisible="4" style="width:65px" %)Value|(% _mstvisible="4" style="width:267px" %)(% _mstvisible="5" %)
435 (((
436 (% _msthash="1817497" _msttexthash="128427" _mstvisible="6" %)
437 BAT Status
438
439 (% _msthash="1817498" _msttexthash="472784" _mstvisible="6" %)
440 00(b): Ultra Low ( BAT <= 2.50v)
441
442 (% _msthash="1817499" _msttexthash="483678" _mstvisible="6" %)
443 01(b): Low  (2.50v <=BAT <= 2.55v)
444
445 (% _msthash="1817500" _msttexthash="440791" _mstvisible="6" %)
446 10(b): OK   (2.55v <= BAT <=2.65v)
447
448 (% _msthash="1817501" _msttexthash="334191" _mstvisible="6" %)
449 11(b): Good   (BAT >= 2.65v)
450 )))|(% _mstvisible="4" style="width:134px" %)(% _mstvisible="5" %)
451 (((
452 (% _mstvisible="6" %)
453 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="1817502" _msttexthash="311181" _mstvisible="7"]]
454
455 (% _mstvisible="6" %)
456
457 )))
458
459 * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
460
461 [[image:image-20220523152434-16.png||_mstalt="453921" _mstvisible="3"]]
462
463 * Poll Message Flag:  1: This message is a poll message reply, 0: means this is a normal uplink.
464 * 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.
465 * 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)
466
467 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
468
469 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
470
471 be used to power the external ADC sensor; user can control the power on time for this
472
473 sensor by setting:
474
475 AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
476
477
478
479 == 2.5 Show data on Datacake ==
480
481 (((
482 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:
483 )))
484
485 (((
486
487 )))
488
489 (((
490 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
491 )))
492
493 (((
494 (% 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.
495 )))
496
497 (((
498
499 )))
500
501 (((
502 Add Datacake:
503 )))
504
505
506 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
507
508
509
510 Select default key as Access Key:
511
512
513 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
514
515
516 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
517
518
519 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
520
521
522 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
523
524
525
526 == 2.6 Datalog Feature ==
527
528 (((
529 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.
530 )))
531
532
533
534 === 2.6.1 Ways to get datalog via LoRaWAN ===
535
536 There are two methods:
537
538 1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
539 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.
540
541 === 2.6.2 Unix TimeStamp ===
542
543
544 LHT65N uses Unix TimeStamp format based on
545
546
547 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
548
549
550
551 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
552
553 Below is the converter example
554
555 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
556
557 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
558
559
560
561 === 2.6.3 Set Device Time ===
562
563 There are two ways to set device's time:
564
565 **~1. Through LoRaWAN MAC Command (Default settings)**
566
567 User need to set SYNCMOD=1 to enable sync time via MAC command.
568
569 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).
570
571 (% 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.
572
573
574 **2. Manually Set Time**
575
576 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
577
578
579
580 === 2.6.4 Poll sensor value ===
581
582 User can poll sensor value based on timestamps from the server. Below is the downlink command.
583
584 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
585
586
587 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.
588
589 For example, downlink command **31 5FC5F350 5FC6 0160 05**
590
591 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
592
593 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
594
595
596
597 === 2.6.5 Datalog Uplink payload ===
598
599 (% _msthash="315267" _msttexthash="2245087" _mstvisible="1" %)
600 The Datalog poll reply uplink will use below payload format.
601
602 (% _mstvisible="1" %)
603 (((
604 (% _mstvisible="2" %)
605 (% _msthash="506080" _msttexthash="451581" _mstvisible="4" %)**Retrieval data payload**
606 )))
607
608 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
609 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 93px;" %)(% _mstvisible="5" %)
610 (((
611 (% _mstvisible="6" %)
612 (((
613 (% _mstvisible="7" %)
614 (% _msthash="2224750" _msttexthash="161122" _mstvisible="9" %)**Size(bytes)**
615 )))
616 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
617 (((
618 (% _mstvisible="6" %)
619 (((
620 (% _mstvisible="7" %)
621 (% _msthash="2224751" _msttexthash="4550" _mstvisible="9" %)**2**
622 )))
623 )))|=(% _mstvisible="4" style="width: 102px;" %)(% _mstvisible="5" %)
624 (((
625 (% _mstvisible="6" %)
626 (((
627 (% _mstvisible="7" %)
628 (% _msthash="2224752" _msttexthash="4550" _mstvisible="9" %)**2**
629 )))
630 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
631 (((
632 (% _mstvisible="6" %)
633 (((
634 (% _mstvisible="7" %)
635 (% _msthash="2224753" _msttexthash="4550" _mstvisible="9" %)**2**
636 )))
637 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
638 (((
639 (% _mstvisible="6" %)
640 (((
641 (% _mstvisible="7" %)
642 (% _msthash="2224754" _msttexthash="4459" _mstvisible="9" %)**1**
643 )))
644 )))|=(% _mstvisible="4" style="width: 48px;" %)(% _mstvisible="5" %)
645 (((
646 (% _mstvisible="6" %)
647 (((
648 (% _mstvisible="7" %)
649 (% _msthash="2224755" _msttexthash="4732" _mstvisible="9" %)**4**
650 )))
651 )))
652 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:93px" %)(% _mstvisible="5" %)
653 (((
654 (% _mstvisible="6" %)
655 (((
656 (% _mstvisible="7" %)
657 (% _msthash="2224756" _msttexthash="60203" _mstvisible="9" %)**Value**
658 )))
659 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
660 (((
661 (% _mstvisible="6" %)
662 (((
663 (% _mstvisible="7" %)
664 [[External sensor data>>||anchor="H2.4.6Extvalue" _msthash="2224757" _msttexthash="386672" _mstvisible="8"]]
665 )))
666 )))|(% _mstvisible="4" style="width:102px" %)(% _mstvisible="5" %)
667 (((
668 (% _mstvisible="6" %)
669 (((
670 (% _mstvisible="7" %)
671 (((
672 (% _mstvisible="8" %)
673 [[Built In>>||anchor="H2.4.3Built-inTemperature" _msthash="2671864" _msttexthash="91065" _mstvisible="9"]]
674 )))
675 )))
676
677 (% _mstvisible="6" %)
678 (((
679 (% _mstvisible="7" %)
680 (((
681 (% _mstvisible="8" %)
682 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2671865" _msttexthash="184041" _mstvisible="9"]]
683 )))
684 )))
685 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
686 (((
687 (% _mstvisible="6" %)
688 (((
689 (% _mstvisible="7" %)
690 (((
691 (% _mstvisible="8" %)
692 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2671866" _msttexthash="105872" _mstvisible="9"]]
693 )))
694 )))
695
696 (% _mstvisible="6" %)
697 (((
698 (% _mstvisible="7" %)
699 (((
700 (% _mstvisible="8" %)
701 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2671867" _msttexthash="117429" _mstvisible="9"]]
702 )))
703 )))
704 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
705 (((
706 (% _mstvisible="6" %)
707 (((
708 (% _msthash="2224758" _msttexthash="390390" _mstvisible="7" %)
709 Poll message flag & Ext
710 )))
711 )))|(% _mstvisible="4" style="width:48px" %)(% _mstvisible="5" %)
712 (((
713 (% _mstvisible="6" %)
714 (((
715 (% _mstvisible="7" %)
716 (((
717 (% _mstvisible="8" %)
718 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2671868" _msttexthash="227175" _mstvisible="9"]]
719 )))
720 )))
721
722 (% _mstvisible="6" %)
723 (((
724 (% _mstvisible="7" %)
725 (((
726 (% _mstvisible="8" %)
727
728 )))
729 )))
730 )))
731
732 (% _mstvisible="1" %)
733 (% _msthash="315268" _msttexthash="390390" _mstvisible="3" %)**Poll message flag & Ext**
734
735 (% _mstvisible="1" %)
736 [[image:image-20220523152208-14.png||_mstalt="452920" _mstvisible="3"]]
737
738 (% _mstvisible="1" %)
739 (((
740 (% _mstvisible="2" %)
741 (((
742 (% _msthash="736723" _msttexthash="2005003" _mstvisible="3" %)
743 Poll Message Flag: 1: This message is a poll message reply.
744 )))
745 )))
746
747 (% _mstvisible="1" %)
748 * (% _mstvisible="3" %)
749 (((
750 (% _mstvisible="4" %)
751 (((
752 (% _msthash="1197157" _msttexthash="561548" _mstvisible="5" %)
753 Poll Message Flag is set to 1.
754 )))
755 )))
756 * (% _mstvisible="3" %)
757 (((
758 (% _mstvisible="4" %)
759 (((
760 (% _msthash="1197158" _msttexthash="9284964" _mstvisible="5" %)
761 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
762 )))
763 )))
764
765 (% _mstvisible="1" %)
766 (((
767 (% _mstvisible="2" %)
768 (((
769 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
770
771
772 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
773 For example, in US915 band, the max payload for different DR is:
774 )))
775 )))
776
777 (% _mstvisible="1" %)
778 (((
779 (% _mstvisible="2" %)
780 (((
781 (% _msthash="736725" _msttexthash="1065532" _mstvisible="3" %)
782 a) DR0: max is 11 bytes so one entry of data
783 )))
784 )))
785
786 (% _mstvisible="1" %)
787 (((
788 (% _mstvisible="2" %)
789 (((
790 (% _msthash="736726" _msttexthash="3265665" _mstvisible="3" %)
791 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
792 )))
793 )))
794
795 (% _mstvisible="1" %)
796 (((
797 (% _mstvisible="2" %)
798 (((
799 (% _msthash="736727" _msttexthash="1454115" _mstvisible="3" style="text-align: left;" %)
800 c) DR2: total payload includes 11 entries of data
801 )))
802 )))
803
804 (% _mstvisible="1" %)
805 (((
806 (% _mstvisible="2" %)
807 (((
808 (% _msthash="736728" _msttexthash="1483924" _mstvisible="3" style="text-align: left;" %)
809 d) DR3: total payload includes 22 entries of data.
810 )))
811 )))
812
813 (% _mstvisible="1" %)
814 (((
815 (% _mstvisible="2" %)
816 (((
817 (% _msthash="736729" _msttexthash="5848349" _mstvisible="3" style="text-align: left;" %)
818 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
819 )))
820 )))
821
822
823 (% _mstvisible="1" style="text-align: left;" %)
824 (% _msthash="315269" _msttexthash="104767" _mstvisible="3" %)**Example:**
825
826 (% _msthash="315270" _msttexthash="913822" _mstvisible="1" style="text-align: left;" %)
827 If LHT65N has below data inside Flash:
828
829 (% _mstvisible="1" %)
830 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
831
832 (% _mstvisible="1" %)
833 (((
834 (% _msthash="506081" _msttexthash="1663961" _mstvisible="2" style="text-align: left;" %)
835 If user sends below downlink command: (% _mstvisible="3" style="background-color:yellow" %)3160065F9760066DA705
836 )))
837
838 (% _mstvisible="1" %)
839 (((
840 (% _msthash="506082" _msttexthash="1092494" _mstvisible="2" style="text-align: left;" %)
841 Where : Start time: 60065F97 = time 21/1/19 04:27:03
842 )))
843
844 (% _mstvisible="1" %)
845 (((
846 (% _msthash="506083" _msttexthash="737269" _mstvisible="2" style="text-align: left;" %)
847 Stop time 60066DA7= time 21/1/19 05:27:(% _msthash="903005" _msttexthash="9672" _mstvisible="2" %)03
848 )))
849
850 (% _mstvisible="1" %)
851 (((
852 (% _mstvisible="2" %)
853
854 )))
855
856 (% _mstvisible="1" %)
857 (((
858 (% _msthash="506084" _msttexthash="751218" _mstvisible="2" style="text-align: left;" %)
859 LHT65N will uplink this payload.
860 )))
861
862 (% _mstvisible="1" %)
863 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
864
865 (% _msthash="315271" _msttexthash="12012546" _mstvisible="1" style="text-align: left;" %)
866 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
867
868 (% _msthash="315237" _msttexthash="1385839" %)
869 Where the first 11 bytes is for the first entry:
870
871 (% _msthash="315238" _msttexthash="274846" %)
872 7FFF089801464160065F97
873
874 (% _msthash="315239" _msttexthash="617435" %)
875 Ext sensor data=0x7FFF/100=327.67
876
877 (% _msthash="315240" _msttexthash="270543" %)
878 Temp=0x0898/100=22.00
879
880 (% _msthash="315241" _msttexthash="211783" %)
881 Hum=0x0146/10=32.6
882
883 (% _msthash="315242" _msttexthash="1569776" %)
884 poll message flag & Ext=0x41,means reply data,Ext=1
885
886 (% _msthash="315243" _msttexthash="1120509" %)
887 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
888
889
890
891 == 2.7 Alarm Mode ==
892
893 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.
894
895 (% style="color:red" %)Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.
896
897 **AT COMMAND FOR ALARM MODE:**
898
899 (% _mstvisible="1" class="box infomessage" %)
900 (((
901 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled)
902
903 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
904
905 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
906
907 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
908
909 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
910 )))
911
912
913
914
915 == 2.8 LED Indicator ==
916
917 The LHT65 has a triple color LED which for easy showing different stage .
918
919 While user press ACT button, the LED will work as per LED status with ACT button.
920
921 In a normal working state:
922
923 * For each uplink, the BLUE LED or RED LED will blink once.
924 BLUE LED when external sensor is connected.
925 * RED LED when external sensor is not connected
926 * For each success downlink, the PURPLE LED will blink once
927
928 == 2.9 installation ==
929
930 (% _mstvisible="1" %)
931 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
932
933
934
935 = 3. Sensors and Accessories =
936
937 == 3.1 E2 Extension Cable ==
938
939 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
940
941 1m long breakout cable for LHT65N
942
943 [[image:image-20220619092421-3.png||height="371" width="529"]]
944
945
946
947
948 == 3.2 E3 Temperature Probe ==
949
950
951 [[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"]]
952
953
954 Temperature sensor with 2 meters cable long
955
956 * Resolution: 0.0625 °C
957 * ±0.5°C accuracy from -10°C to +85°C
958 * ±2°C accuracy from -55°C to +125°C
959 * Operating Range: -40 ~~ 125 °C
960 * Working voltage 2.35v ~~ 5v
961
962 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
963
964 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
965
966 * AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
967
968 * LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
969
970 There are two kinds of commands to configure LHT65N, they are:
971
972 * (% style="color:#4f81bd" %)**General Commands**.
973
974 These commands are to configure:
975
976 1. General system settings like: uplink interval.
977 1. LoRaWAN protocol & radio-related commands.
978
979 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]]
980
981 * (% style="color:#4f81bd" %)**Commands special design for LHT65N**
982
983 These commands are only valid for LHT65N, as below:
984
985
986 == 4.1 Set Transmit Interval Time ==
987
988 Feature: Change LoRaWAN End Node Transmit Interval.
989
990 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
991
992 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
993
994
995 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
996
997 Format: Command Code (0x01) followed by 3 bytes time value.
998
999 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1000
1001 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1002
1003 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1004
1005 == 4.2 Set External Sensor Mode ==
1006
1007 Feature: Change External Sensor Mode.
1008
1009 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1010
1011 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1012
1013
1014 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1015
1016 Total bytes: 2 ~~ 5 bytes
1017
1018 **Example:**
1019
1020 * 0xA201: Set external sensor type to E1
1021
1022 * 0xA209: Same as AT+EXT=9
1023
1024 * 0xA20702003c: Same as AT+SETCNT=60
1025
1026 == 4.3 Enable/Disable uplink Temperature probe ID ==
1027
1028 (((
1029 Feature: If PID is enabled, device will send the temperature probe ID on:
1030 )))
1031
1032 * (((
1033 First Packet after OTAA Join
1034 )))
1035 * (((
1036 Every 24 hours since the first packet.
1037 )))
1038
1039 (((
1040 PID is default set to disable (0)
1041 )))
1042
1043 (% style="color:#4f81bd" %)**AT Command:**
1044
1045 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1046
1047
1048 (% style="color:#4f81bd" %)**Downlink Command:**
1049
1050 * **0xA800**  **~-~->** AT+PID=0
1051 * **0xA801**     **~-~->** AT+PID=1
1052
1053 == 4.4 Set Password ==
1054
1055 Feature: Set device password, max 9 digits
1056
1057 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1058
1059 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1060
1061
1062 (% style="color:#4f81bd" %)**Downlink Command:**
1063
1064 No downlink command for this feature.
1065
1066
1067
1068 == 4.5 Quit AT Command ==
1069
1070 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1071
1072 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1073
1074 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1075
1076
1077 (% style="color:#4f81bd" %)**Downlink Command:**
1078
1079 No downlink command for this feature.
1080
1081
1082
1083 == 4.6 Set to sleep mode ==
1084
1085 Feature: Set device to sleep mode
1086
1087 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1088 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1089
1090 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1091
1092 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1093
1094
1095 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1096
1097 * There is no downlink command to set to Sleep mode.
1098
1099 == 4.7 Set system time ==
1100
1101 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1102
1103 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1104
1105 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1106
1107
1108 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1109
1110 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1111
1112
1113
1114 == 4.8 Set Time Sync Mode ==
1115
1116 (((
1117 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1118 )))
1119
1120 (((
1121 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.
1122 )))
1123
1124 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1125
1126 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1127
1128
1129 (% style="color:#4f81bd" %)**Downlink Command:**
1130
1131 0x28 01 ~/~/ Same As AT+SYNCMOD=1
1132 0x28 00 ~/~/ Same As AT+SYNCMOD=0
1133
1134
1135
1136 == 4.9 Set Time Sync Interval ==
1137
1138 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1139
1140 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1141
1142 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1143
1144
1145 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1146
1147 **0x29 0A** ~/~/ Same as AT+SYNCTDC=0x0A
1148
1149
1150
1151 == 4.10 Print data entries base on page. ==
1152
1153 Feature: Print the sector data from start page to stop page (max is 416 pages).
1154
1155 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1156
1157 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1158
1159
1160 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1161
1162 No downlink commands for feature
1163
1164
1165
1166 == 4.11 Print last few data entries. ==
1167
1168 Feature: Print the last few data entries
1169
1170 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1171
1172 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1173
1174
1175 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1176
1177 No downlink commands for feature
1178
1179
1180
1181 == 4.12 Clear Flash Record ==
1182
1183 Feature: Clear flash storage for data log feature.
1184
1185
1186 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1187
1188 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1189
1190
1191 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1192
1193 * Example: 0xA301 ~/~/Same as AT+CLRDTA
1194
1195 == 4.13 Auto Send None-ACK messages ==
1196
1197 (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
1198 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.
1199
1200 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1201
1202 (% _msthash="315396" _msttexthash="734682" _mstvisible="1" %)
1203 The default factory setting is 0
1204
1205 (% _mstvisible="1" border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1206 (% _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**
1207 (% _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
1208
1209 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1210
1211 * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1212
1213 = 5. Battery & How to replace =
1214
1215 == 5.1 Battery Type ==
1216
1217 (((
1218 (((
1219 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.
1220 )))
1221 )))
1222
1223 (((
1224
1225 )))
1226
1227 (((
1228 (((
1229 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1230 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1231 )))
1232 )))
1233
1234 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1235
1236
1237 == 5.2 Replace Battery ==
1238
1239 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.
1240
1241 [[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"]]
1242
1243
1244 == 5.3 Battery Life Analyze ==
1245
1246 (((
1247 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:
1248 [[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]]
1249 )))
1250
1251 (((
1252
1253 )))
1254
1255 (((
1256 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]]
1257 )))
1258
1259
1260
1261 = 6. FAQ =
1262
1263 == 6.1 How to use AT Command? ==
1264
1265 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.
1266
1267 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1268
1269
1270 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1271
1272 (% _msthash="506062" _msttexthash="1187732" %)
1273 **✓ (% style="background-color:yellow" %)USB to TTL GND <~-~->GND(%%)**
1274
1275 (% _msthash="506063" _msttexthash="1158313" %)**✓  **(% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1276
1277 (% _msthash="506064" _msttexthash="1175629" %)**✓  **(% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1278
1279 (% _msthash="506065" _msttexthash="1164696" %)**✓  **(% style="background-color:yellow" %)**USB to TTL 3.3V <~-~-> D-**
1280
1281
1282 (((
1283 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.
1284 )))
1285
1286
1287 Input password and ATZ to activate LHT65N,As shown below:
1288
1289 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1290
1291
1292 (% _msthash="506066" _msttexthash="544869" %)
1293 AT Command List is as below:
1294
1295 (% _msthash="506067" _msttexthash="361920" %)
1296 AT+<CMD>? :  Help on <CMD>
1297
1298 (% _msthash="506068" _msttexthash="243061" %)
1299 AT+<CMD> :  Run <CMD>
1300
1301 (% _msthash="506069" _msttexthash="704197" %)
1302 AT+<CMD>=<value> :  Set the value
1303
1304 (% _msthash="506070" _msttexthash="455676" %)
1305 AT+<CMD>=? :  Get the value
1306
1307 (% _msthash="506071" _msttexthash="670553" %)
1308 AT+DEBUG:  Set more info output
1309
1310 (% _msthash="506072" _msttexthash="485888" %)
1311 ATZ:  Trig a reset of the MCU
1312
1313 (% _msthash="506073" _msttexthash="2068872" %)
1314 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1315
1316 (% _msthash="506074" _msttexthash="689169" %)
1317 AT+DEUI:  Get or Set the Device EUI
1318
1319 (% _msthash="506075" _msttexthash="960414" %)
1320 AT+DADDR:  Get or Set the Device Address
1321
1322 (% _msthash="506076" _msttexthash="1079897" %)
1323 AT+APPKEY:  Get or Set the Application Key
1324
1325 (% _msthash="506077" _msttexthash="1326143" %)
1326 AT+NWKSKEY:  Get or Set the Network Session Key
1327
1328 (% _msthash="506078" _msttexthash="1573000" %)
1329 AT+APPSKEY:  Get or Set the Application Session Key
1330
1331 (% _msthash="506079" _msttexthash="1041729" %)
1332 AT+APPEUI:  Get or Set the Application EUI
1333
1334 (% _msthash="506080" _msttexthash="2104206" %)
1335 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1336
1337 (% _msthash="506081" _msttexthash="3369288" %)
1338 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1339
1340 (% _msthash="506082" _msttexthash="1894529" %)
1341 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1342
1343 (% _msthash="506083" _msttexthash="3864172" %)
1344 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1345
1346 (% _msthash="506084" _msttexthash="1712204" %)
1347 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1348
1349 (% _msthash="506085" _msttexthash="1281202" %)
1350 AT+RX2FQ:  Get or Set the Rx2 window frequency
1351
1352 (% _msthash="506086" _msttexthash="2796781" %)
1353 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1354
1355 (% _msthash="506087" _msttexthash="3285165" %)
1356 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1357
1358 (% _msthash="506088" _msttexthash="3286179" %)
1359 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1360
1361 (% _msthash="506089" _msttexthash="4703803" %)
1362 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1363
1364 (% _msthash="506090" _msttexthash="4704999" %)
1365 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1366
1367 (% _msthash="506091" _msttexthash="1528683" %)
1368 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1369
1370 (% _msthash="506092" _msttexthash="757185" %)
1371 AT+NWKID:  Get or Set the Network ID
1372
1373 (% _msthash="506093" _msttexthash="1156597" %)
1374 AT+FCU:  Get or Set the Frame Counter Uplink
1375
1376 (% _msthash="506094" _msttexthash="1273987" %)
1377 AT+FCD:  Get or Set the Frame Counter Downlink
1378
1379 (% _msthash="506095" _msttexthash="859222" %)
1380 AT+CLASS:  Get or Set the Device Class
1381
1382 (% _msthash="506096" _msttexthash="384852" %)
1383 AT+JOIN:  Join network
1384
1385 (% _msthash="506097" _msttexthash="548626" %)
1386 AT+NJS:  Get the join status
1387
1388 (% _msthash="506098" _msttexthash="2546206" %)
1389 AT+SENDB:  Send hexadecimal data along with the application port
1390
1391 (% _msthash="506099" _msttexthash="1932307" %)
1392 AT+SEND:  Send text data along with the application port
1393
1394 (% _msthash="506100" _msttexthash="3560557" %)
1395 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1396
1397 (% _msthash="506101" _msttexthash="1429701" %)
1398 AT+RECV:  Print last received data in raw format
1399
1400 (% _msthash="506102" _msttexthash="1735981" %)
1401 AT+VER:  Get current image version and Frequency Band
1402
1403 (% _msthash="506103" _msttexthash="1189474" %)
1404 AT+CFM:  Get or Set the confirmation mode (0-1)
1405
1406 (% _msthash="506104" _msttexthash="1718210" %)
1407 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1408
1409 (% _msthash="506105" _msttexthash="1339403" %)
1410 AT+SNR:  Get the SNR of the last received packet
1411
1412 (% _msthash="506106" _msttexthash="1452009" %)
1413 AT+RSSI:  Get the RSSI of the last received packet
1414
1415 (% _msthash="506107" _msttexthash="2768142" %)
1416 AT+TDC:  Get or set the application data transmission interval in ms
1417
1418 (% _msthash="506108" _msttexthash="1083914" %)
1419 AT+PORT:  Get or set the application port
1420
1421 (% _msthash="506109" _msttexthash="622440" %)
1422 AT+DISAT:  Disable AT commands
1423
1424 (% _msthash="506110" _msttexthash="868361" %)
1425 AT+PWORD: Set password, max 9 digits
1426
1427 (% _msthash="506111" _msttexthash="2210299" %)
1428 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1429
1430 (% _msthash="506112" _msttexthash="2113462" %)
1431 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1432
1433 (% _msthash="506113" _msttexthash="2087423" %)
1434 AT+PDTA:  Print the sector data from start page to stop page
1435
1436 (% _msthash="506114" _msttexthash="1063127" %)
1437 AT+PLDTA:  Print the last few sets of data
1438
1439 (% _msthash="506115" _msttexthash="1999426" %)
1440 AT+CLRDTA:  Clear the storage, record position back to 1st
1441
1442 (% _msthash="506116" _msttexthash="442130" %)
1443 AT+SLEEP:  Set sleep mode
1444
1445 (% _msthash="506117" _msttexthash="1080222" %)
1446 AT+EXT:  Get or Set external sensor model
1447
1448 (% _msthash="506118" _msttexthash="1309490" %)
1449 AT+BAT:  Get the current battery voltage in mV
1450
1451 (% _msthash="506119" _msttexthash="813891" %)
1452 AT+CFG:  Print all configurations
1453
1454 (% _msthash="506120" _msttexthash="551707" %)
1455 AT+WMOD:  Get or Set Work Mode
1456
1457 (% _msthash="506121" _msttexthash="2631499" %)
1458 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1459
1460 (% _msthash="506122" _msttexthash="3907150" %)
1461 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1462
1463 (% _msthash="506123" _msttexthash="854620" %)
1464 AT+SETCNT:  Set the count at present
1465
1466 (% _msthash="506124" _msttexthash="2554877" %)
1467 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1468
1469 (% _msthash="506125" _msttexthash="771849" %)
1470 AT+RPL:  Get or set response level
1471
1472 (% _msthash="506126" _msttexthash="1484314" %)
1473 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1474
1475 (% _msthash="506127" _msttexthash="741728" %)
1476 AT+LEAPSEC:  Get or Set Leap Second
1477
1478 (% _msthash="506128" _msttexthash="1694017" %)
1479 AT+SYNCMOD:  Get or Set time synchronization method
1480
1481 (% _msthash="506129" _msttexthash="2235948" %)
1482 AT+SYNCTDC:  Get or set time synchronization interval in day
1483
1484 (% _msthash="506130" _msttexthash="425542" %)
1485 AT+PID:  Get or set the PID
1486
1487
1488 == 6.2 Where to use AT commands and Downlink commands ==
1489
1490 (% _msthash="506131" _msttexthash="14585714" %)
1491 AT commands：
1492
1493 [[image:image-20220620153708-1.png||height="603" width="723"]]
1494
1495 (% _msthash="506132" _msttexthash="337922" %)
1496 Downlink commands:
1497
1498
1499 (% _msthash="506133" _msttexthash="33046" %)
1500 **TTN:**
1501
1502 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1503
1504
1505 (% _msthash="506134" _msttexthash="11113791" %)
1506 **Helium：**
1507
1508 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1509
1510
1511 (% _msthash="506135" _msttexthash="4159844" %)
1512 **Chirpstack:The downlink window will not be displayed until the network is accessed**
1513
1514 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1515
1516 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1517
1518
1519 (% _msthash="506136" _msttexthash="39286" %)
1520 **Aws:**
1521
1522 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1523
1524
1525
1526 == 6.3 How to change the uplink interval？ ==
1527
1528 [[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"]]
1529
1530
1531
1532 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1533
1534 [[image:image-20220615153355-1.png]]
1535
1536 [[image:1655802313617-381.png]]
1537
1538
1539 (((
1540 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.
1541 )))
1542
1543
1544 Input password and ATZ to activate LHT65N,As shown below:
1545
1546 [[image:image-20220615154519-3.png||height="672" width="807"]]
1547
1548
1549
1550 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1551
1552
1553 [[image:image-20220615153355-1.png]]
1554
1555
1556 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1557
1558 [[image:image-20220615170542-5.png]]
1559
1560
1561 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1562
1563 (% _msthash="506146" _msttexthash="52173160" %)
1564 First connect the four lines；(% style="display:none" %)
1565
1566 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1567
1568
1569 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1570
1571 [[image:image-20220621170938-2.png]]
1572
1573
1574 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1575
1576 [[image:image-20220615171334-6.png]]
1577
1578
1579 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1580
1581
1582 When this interface appears, it indicates that the download has been completed.
1583
1584 [[image:image-20220620160723-8.png]]
1585
1586
1587 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1588
1589
1590
1591 = 7. Order Info =
1592
1593
1594 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1595
1596 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1597
1598 (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1599
1600 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1601
1602 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1603
1604 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1605
1606 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1607
1608 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1609
1610 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1611
1612 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1613
1614 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1615
1616 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1617
1618 = 8. Packing Info =
1619
1620
1621 **Package Includes**:
1622
1623 * LHT65N Temperature & Humidity Sensor x 1
1624 * Optional external sensor
1625
1626 **Dimension and weight**:
1627
1628 * Device Size:  10 x 10 x 3.5 cm
1629 * Device Weight: 120.5g
1630
1631 = 9. Reference material =
1632
1633 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1634
1635 = 10. FCC Warning =
1636
1637 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1638
1639 (1) This device may not cause harmful interference；
1640
1641 (2) this device must accept any interference received, including interference that may cause undesired operation.