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Version 170.28 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
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. 
113 )))
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:
117 )))
118
119
120 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
121
122 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
123
124
125
126 == 2.3 Example to join LoRaWAN network ==
127
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:
137 )))
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.
145 )))
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"]]
159
160
161 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
162
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"]]
171
172
173 Input APP EUI,  APP KEY and DEV EUI:
174
175
176 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
177
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"]]
188
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 === 2.4.1 Decoder in TTN V3 ===
271
272 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.
273
274 Below is the position to put the decoder and LHT65N decoder can be download from here:
275
276
277 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0||_msthash="315253" _msttexthash="3509064" _mstvisible="2"]]
278
279
280 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
281
282
283
284
285 === 2.4.2 BAT-Battery Info ===
286
287 These two bytes of BAT include the battery state and the actually voltage
288
289 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
290
291
292 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
293
294
295 Check the battery voltage for LHT65N.
296
297 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
298 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
299
300 === 2.4.3 Built-in Temperature ===
301
302 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
303
304 * Temperature:  0x0ABB/100=27.47℃
305
306 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
307
308 * Temperature:  (0xF5C6-65536)/100=-26.18℃
309
310 === 2.4.4 Built-in Humidity ===
311
312 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
313
314 * Humidity:    0x025C/10=60.4%
315
316 === 2.4.5 Ext # ===
317
318 Bytes for External Sensor:
319
320 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
321
322
323
324 === 2.4.6 Ext value ===
325
326 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
327
328
329 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
330
331
332 * DS18B20 temp=0x0ADD/100=27.81℃
333
334 The last 2 bytes of data are meaningless
335
336 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
337
338
339 * External temperature= (0xF54F-65536)/100=-27.37℃
340
341 The last 2 bytes of data are meaningless
342
343 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
344
345
346
347 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
348
349 (((
350 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:
351 )))
352
353 (((
354
355 )))
356
357 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
358 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 96px;" %)(% _mstvisible="5" %)
359 (((
360 (% _mstvisible="6" %)
361 (% _msthash="1817488" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
362 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
363 (((
364 (% _mstvisible="6" %)
365 (% _msthash="1817489" _msttexthash="4550" _mstvisible="8" %)**2**
366 )))|=(% _mstvisible="4" style="width: 99px;" %)(% _mstvisible="5" %)
367 (((
368 (% _mstvisible="6" %)
369 (% _msthash="1817490" _msttexthash="4550" _mstvisible="8" %)**2**
370 )))|=(% _mstvisible="4" style="width: 132px;" %)(% _mstvisible="5" %)
371 (((
372 (% _mstvisible="6" %)
373 (% _msthash="1817491" _msttexthash="4550" _mstvisible="8" %)**2**
374 )))|=(% _mstvisible="4" style="width: 54px;" %)(% _mstvisible="5" %)
375 (((
376 (% _mstvisible="6" %)
377 (% _msthash="1817492" _msttexthash="4459" _mstvisible="8" %)**1**
378 )))|=(% _mstvisible="4" style="width: 64px;" %)(% _mstvisible="5" %)
379 (((
380 (% _mstvisible="6" %)
381 (% _msthash="1817493" _msttexthash="4732" _mstvisible="8" %)**4**
382 )))
383 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:96px" %)(% _mstvisible="5" %)
384 (((
385 (% _mstvisible="6" %)
386 (% _msthash="1817494" _msttexthash="60203" _mstvisible="8" %)**Value**
387 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
388 (((
389 (% _mstvisible="6" %)
390 [[External temperature>>||anchor="H4.2SetExternalSensorMode" _msthash="1817495" _msttexthash="426517" _mstvisible="7"]]
391 )))|(% _mstvisible="4" style="width:99px" %)(% _mstvisible="5" %)
392 (((
393 (% _mstvisible="6" %)
394 (((
395 (% _mstvisible="7" %)
396 [[Built-In>>||anchor="H2.4.3Built-inTemperature" _msthash="2224745" _msttexthash="100464" _mstvisible="8"]]
397 )))
398
399 (% _mstvisible="6" %)
400 (((
401 (% _mstvisible="7" %)
402 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224746" _msttexthash="184041" _mstvisible="8"]]
403 )))
404 )))|(% _mstvisible="4" style="width:132px" %)(% _mstvisible="5" %)
405 (((
406 (% _mstvisible="6" %)
407 (((
408 (% _msthash="2224747" _msttexthash="136331" _mstvisible="7" %)
409 BAT Status &
410 )))
411
412 (% _mstvisible="6" %)
413 (((
414 (% _mstvisible="7" %)
415 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224748" _msttexthash="311181" _mstvisible="8"]]
416 )))
417 )))|(% _mstvisible="4" style="width:54px" %)(% _mstvisible="5" %)
418 (((
419 (% _msthash="1817496" _msttexthash="147225" _mstvisible="6" %)
420 Status & Ext
421 )))|(% _mstvisible="4" style="width:64px" %)(% _mstvisible="5" %)
422 (((
423 (% _mstvisible="6" %)
424 (((
425 (% _mstvisible="7" %)
426 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2224749" _msttexthash="227175" _mstvisible="8"]]
427 )))
428 )))
429
430 (% _mstvisible="1" %)
431 * (% _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**
432
433 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
434 (% _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]
435 (% _mstvisible="3" %)|(% _msthash="1230921" _msttexthash="60203" _mstvisible="4" style="width:65px" %)Value|(% _mstvisible="4" style="width:267px" %)(% _mstvisible="5" %)
436 (((
437 (% _msthash="1817497" _msttexthash="128427" _mstvisible="6" %)
438 BAT Status
439
440 (% _msthash="1817498" _msttexthash="472784" _mstvisible="6" %)
441 00(b): Ultra Low ( BAT <= 2.50v)
442
443 (% _msthash="1817499" _msttexthash="483678" _mstvisible="6" %)
444 01(b): Low  (2.50v <=BAT <= 2.55v)
445
446 (% _msthash="1817500" _msttexthash="440791" _mstvisible="6" %)
447 10(b): OK   (2.55v <= BAT <=2.65v)
448
449 (% _msthash="1817501" _msttexthash="334191" _mstvisible="6" %)
450 11(b): Good   (BAT >= 2.65v)
451 )))|(% _mstvisible="4" style="width:134px" %)(% _mstvisible="5" %)
452 (((
453 (% _mstvisible="6" %)
454 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="1817502" _msttexthash="311181" _mstvisible="7"]]
455
456 (% _mstvisible="6" %)
457
458 )))
459
460 * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
461
462 [[image:image-20220523152434-16.png||_mstalt="453921" _mstvisible="3"]]
463
464 * Poll Message Flag:  1: This message is a poll message reply, 0: means this is a normal uplink.
465 * 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.
466 * 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)
467
468 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
469
470 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
471
472 be used to power the external ADC sensor; user can control the power on time for this
473
474 sensor by setting:
475
476 AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
477
478
479
480 == 2.5 Show data on Datacake ==
481
482 (((
483 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:
484 )))
485
486 (((
487
488 )))
489
490 (((
491 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
492 )))
493
494 (((
495 (% 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.
496 )))
497
498 (((
499
500 )))
501
502 (((
503 Add Datacake:
504 )))
505
506
507 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
508
509
510
511 Select default key as Access Key:
512
513
514 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
515
516
517 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
518
519
520 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
521
522
523 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
524
525
526
527 == 2.6 Datalog Feature ==
528
529 (((
530 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.
531 )))
532
533
534
535 === 2.6.1 Ways to get datalog via LoRaWAN ===
536
537 There are two methods:
538
539 1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
540 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.
541
542 === 2.6.2 Unix TimeStamp ===
543
544
545 LHT65N uses Unix TimeStamp format based on
546
547
548 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
549
550
551
552 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
553
554 Below is the converter example
555
556 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
557
558 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
559
560
561
562 === 2.6.3 Set Device Time ===
563
564 There are two ways to set device's time:
565
566 **~1. Through LoRaWAN MAC Command (Default settings)**
567
568 User need to set SYNCMOD=1 to enable sync time via MAC command.
569
570 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).
571
572 (% 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.
573
574
575 **2. Manually Set Time**
576
577 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
578
579
580
581 === 2.6.4 Poll sensor value ===
582
583 User can poll sensor value based on timestamps from the server. Below is the downlink command.
584
585 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
586
587
588 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.
589
590 For example, downlink command **31 5FC5F350 5FC6 0160 05**
591
592 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
593
594 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
595
596
597
598 === 2.6.5 Datalog Uplink payload ===
599
600 (% _msthash="315267" _msttexthash="2245087" _mstvisible="1" %)
601 The Datalog poll reply uplink will use below payload format.
602
603 (% _mstvisible="1" %)
604 (((
605 (% _mstvisible="2" %)
606 (% _msthash="506080" _msttexthash="451581" _mstvisible="4" %)**Retrieval data payload**
607 )))
608
609 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
610 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 93px;" %)(% _mstvisible="5" %)
611 (((
612 (% _mstvisible="6" %)
613 (((
614 (% _mstvisible="7" %)
615 (% _msthash="2224750" _msttexthash="161122" _mstvisible="9" %)**Size(bytes)**
616 )))
617 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
618 (((
619 (% _mstvisible="6" %)
620 (((
621 (% _mstvisible="7" %)
622 (% _msthash="2224751" _msttexthash="4550" _mstvisible="9" %)**2**
623 )))
624 )))|=(% _mstvisible="4" style="width: 102px;" %)(% _mstvisible="5" %)
625 (((
626 (% _mstvisible="6" %)
627 (((
628 (% _mstvisible="7" %)
629 (% _msthash="2224752" _msttexthash="4550" _mstvisible="9" %)**2**
630 )))
631 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
632 (((
633 (% _mstvisible="6" %)
634 (((
635 (% _mstvisible="7" %)
636 (% _msthash="2224753" _msttexthash="4550" _mstvisible="9" %)**2**
637 )))
638 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
639 (((
640 (% _mstvisible="6" %)
641 (((
642 (% _mstvisible="7" %)
643 (% _msthash="2224754" _msttexthash="4459" _mstvisible="9" %)**1**
644 )))
645 )))|=(% _mstvisible="4" style="width: 48px;" %)(% _mstvisible="5" %)
646 (((
647 (% _mstvisible="6" %)
648 (((
649 (% _mstvisible="7" %)
650 (% _msthash="2224755" _msttexthash="4732" _mstvisible="9" %)**4**
651 )))
652 )))
653 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:93px" %)(% _mstvisible="5" %)
654 (((
655 (% _mstvisible="6" %)
656 (((
657 (% _mstvisible="7" %)
658 (% _msthash="2224756" _msttexthash="60203" _mstvisible="9" %)**Value**
659 )))
660 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
661 (((
662 (% _mstvisible="6" %)
663 (((
664 (% _mstvisible="7" %)
665 [[External sensor data>>||anchor="H2.4.6Extvalue" _msthash="2224757" _msttexthash="386672" _mstvisible="8"]]
666 )))
667 )))|(% _mstvisible="4" style="width:102px" %)(% _mstvisible="5" %)
668 (((
669 (% _mstvisible="6" %)
670 (((
671 (% _mstvisible="7" %)
672 (((
673 (% _mstvisible="8" %)
674 [[Built In>>||anchor="H2.4.3Built-inTemperature" _msthash="2671864" _msttexthash="91065" _mstvisible="9"]]
675 )))
676 )))
677
678 (% _mstvisible="6" %)
679 (((
680 (% _mstvisible="7" %)
681 (((
682 (% _mstvisible="8" %)
683 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2671865" _msttexthash="184041" _mstvisible="9"]]
684 )))
685 )))
686 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
687 (((
688 (% _mstvisible="6" %)
689 (((
690 (% _mstvisible="7" %)
691 (((
692 (% _mstvisible="8" %)
693 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2671866" _msttexthash="105872" _mstvisible="9"]]
694 )))
695 )))
696
697 (% _mstvisible="6" %)
698 (((
699 (% _mstvisible="7" %)
700 (((
701 (% _mstvisible="8" %)
702 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2671867" _msttexthash="117429" _mstvisible="9"]]
703 )))
704 )))
705 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
706 (((
707 (% _mstvisible="6" %)
708 (((
709 (% _msthash="2224758" _msttexthash="390390" _mstvisible="7" %)
710 Poll message flag & Ext
711 )))
712 )))|(% _mstvisible="4" style="width:48px" %)(% _mstvisible="5" %)
713 (((
714 (% _mstvisible="6" %)
715 (((
716 (% _mstvisible="7" %)
717 (((
718 (% _mstvisible="8" %)
719 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2671868" _msttexthash="227175" _mstvisible="9"]]
720 )))
721 )))
722
723 (% _mstvisible="6" %)
724 (((
725 (% _mstvisible="7" %)
726 (((
727 (% _mstvisible="8" %)
728
729 )))
730 )))
731 )))
732
733 (% _mstvisible="1" %)
734 (% _msthash="315268" _msttexthash="390390" _mstvisible="3" %)**Poll message flag & Ext**
735
736 (% _mstvisible="1" %)
737 [[image:image-20220523152208-14.png||_mstalt="452920" _mstvisible="3"]]
738
739 (% _mstvisible="1" %)
740 (((
741 (% _mstvisible="2" %)
742 (((
743 (% _msthash="736723" _msttexthash="2005003" _mstvisible="3" %)
744 Poll Message Flag: 1: This message is a poll message reply.
745 )))
746 )))
747
748 (% _mstvisible="1" %)
749 * (% _mstvisible="3" %)
750 (((
751 (% _mstvisible="4" %)
752 (((
753 (% _msthash="1197157" _msttexthash="561548" _mstvisible="5" %)
754 Poll Message Flag is set to 1.
755 )))
756 )))
757 * (% _mstvisible="3" %)
758 (((
759 (% _mstvisible="4" %)
760 (((
761 (% _msthash="1197158" _msttexthash="9284964" _mstvisible="5" %)
762 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
763 )))
764 )))
765
766 (% _mstvisible="1" %)
767 (((
768 (% _mstvisible="2" %)
769 (((
770 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
771
772
773 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
774 For example, in US915 band, the max payload for different DR is:
775 )))
776 )))
777
778 (% _mstvisible="1" %)
779 (((
780 (% _mstvisible="2" %)
781 (((
782 (% _msthash="736725" _msttexthash="1065532" _mstvisible="3" %)
783 a) DR0: max is 11 bytes so one entry of data
784 )))
785 )))
786
787 (% _mstvisible="1" %)
788 (((
789 (% _mstvisible="2" %)
790 (((
791 (% _msthash="736726" _msttexthash="3265665" _mstvisible="3" %)
792 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
793 )))
794 )))
795
796 (% _mstvisible="1" %)
797 (((
798 (% _mstvisible="2" %)
799 (((
800 (% _msthash="736727" _msttexthash="1454115" _mstvisible="3" style="text-align: left;" %)
801 c) DR2: total payload includes 11 entries of data
802 )))
803 )))
804
805 (% _mstvisible="1" %)
806 (((
807 (% _mstvisible="2" %)
808 (((
809 (% _msthash="736728" _msttexthash="1483924" _mstvisible="3" style="text-align: left;" %)
810 d) DR3: total payload includes 22 entries of data.
811 )))
812 )))
813
814 (% _mstvisible="1" %)
815 (((
816 (% _mstvisible="2" %)
817 (((
818 (% _msthash="736729" _msttexthash="5848349" _mstvisible="3" style="text-align: left;" %)
819 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
820 )))
821 )))
822
823
824 (% _mstvisible="1" style="text-align: left;" %)
825 (% _msthash="315269" _msttexthash="104767" _mstvisible="3" %)**Example:**
826
827 (% _msthash="315270" _msttexthash="913822" _mstvisible="1" style="text-align: left;" %)
828 If LHT65N has below data inside Flash:
829
830 (% _mstvisible="1" %)
831 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
832
833 (% _mstvisible="1" %)
834 (((
835 (% _msthash="506081" _msttexthash="1663961" _mstvisible="2" style="text-align: left;" %)
836 If user sends below downlink command: (% _mstvisible="3" style="background-color:yellow" %)3160065F9760066DA705
837 )))
838
839 (% _mstvisible="1" %)
840 (((
841 (% _msthash="506082" _msttexthash="1092494" _mstvisible="2" style="text-align: left;" %)
842 Where : Start time: 60065F97 = time 21/1/19 04:27:03
843 )))
844
845 (% _mstvisible="1" %)
846 (((
847 (% _msthash="506083" _msttexthash="737269" _mstvisible="2" style="text-align: left;" %)
848 Stop time 60066DA7= time 21/1/19 05:27:(% _msthash="903005" _msttexthash="9672" _mstvisible="2" %)03
849 )))
850
851 (% _mstvisible="1" %)
852 (((
853 (% _mstvisible="2" %)
854
855 )))
856
857 (% _mstvisible="1" %)
858 (((
859 (% _msthash="506084" _msttexthash="751218" _mstvisible="2" style="text-align: left;" %)
860 LHT65N will uplink this payload.
861 )))
862
863 (% _mstvisible="1" %)
864 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
865
866 (% _msthash="315271" _msttexthash="12012546" _mstvisible="1" style="text-align: left;" %)
867 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
868
869 (% _msthash="315237" _msttexthash="1385839" %)
870 Where the first 11 bytes is for the first entry:
871
872 (% _msthash="315238" _msttexthash="274846" %)
873 7FFF089801464160065F97
874
875 (% _msthash="315239" _msttexthash="617435" %)
876 Ext sensor data=0x7FFF/100=327.67
877
878 (% _msthash="315240" _msttexthash="270543" %)
879 Temp=0x0898/100=22.00
880
881 (% _msthash="315241" _msttexthash="211783" %)
882 Hum=0x0146/10=32.6
883
884 (% _msthash="315242" _msttexthash="1569776" %)
885 poll message flag & Ext=0x41,means reply data,Ext=1
886
887 (% _msthash="315243" _msttexthash="1120509" %)
888 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
889
890
891
892 == 2.7 Alarm Mode ==
893
894 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.
895
896 (% style="color:red" %)Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.
897
898 **AT COMMAND FOR ALARM MODE:**
899
900 (% _mstvisible="1" class="box infomessage" %)
901 (((
902 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled)
903
904 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
905
906 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
907
908 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
909
910 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
911 )))
912
913
914
915
916 == 2.8 LED Indicator ==
917
918 The LHT65 has a triple color LED which for easy showing different stage .
919
920 While user press ACT button, the LED will work as per LED status with ACT button.
921
922 In a normal working state:
923
924 * For each uplink, the BLUE LED or RED LED will blink once.
925 BLUE LED when external sensor is connected.
926 * RED LED when external sensor is not connected
927 * For each success downlink, the PURPLE LED will blink once
928
929 == 2.9 installation ==
930
931 (% _mstvisible="1" %)
932 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
933
934
935
936 = 3. Sensors and Accessories =
937
938 == 3.1 E2 Extension Cable ==
939
940 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
941
942 1m long breakout cable for LHT65N
943
944 [[image:image-20220619092421-3.png||height="371" width="529"]]
945
946
947
948
949 == 3.2 E3 Temperature Probe ==
950
951
952 [[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"]]
953
954
955 Temperature sensor with 2 meters cable long
956
957 * Resolution: 0.0625 °C
958 * ±0.5°C accuracy from -10°C to +85°C
959 * ±2°C accuracy from -55°C to +125°C
960 * Operating Range: -40 ~~ 125 °C
961 * Working voltage 2.35v ~~ 5v
962
963 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
964
965 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
966
967 * AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
968
969 * LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
970
971 There are two kinds of commands to configure LHT65N, they are:
972
973 * (% style="color:#4f81bd" %)**General Commands**.
974
975 These commands are to configure:
976
977 1. General system settings like: uplink interval.
978 1. LoRaWAN protocol & radio-related commands.
979
980 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]]
981
982 * (% style="color:#4f81bd" %)**Commands special design for LHT65N**
983
984 These commands are only valid for LHT65N, as below:
985
986
987 == 4.1 Set Transmit Interval Time ==
988
989 Feature: Change LoRaWAN End Node Transmit Interval.
990
991 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
992
993 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
994
995
996 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
997
998 Format: Command Code (0x01) followed by 3 bytes time value.
999
1000 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1001
1002 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1003
1004 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1005
1006 == 4.2 Set External Sensor Mode ==
1007
1008 Feature: Change External Sensor Mode.
1009
1010 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1011
1012 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1013
1014
1015 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1016
1017 Total bytes: 2 ~~ 5 bytes
1018
1019 **Example:**
1020
1021 * 0xA201: Set external sensor type to E1
1022
1023 * 0xA209: Same as AT+EXT=9
1024
1025 * 0xA20702003c: Same as AT+SETCNT=60
1026
1027 == 4.3 Enable/Disable uplink Temperature probe ID ==
1028
1029 (((
1030 Feature: If PID is enabled, device will send the temperature probe ID on:
1031 )))
1032
1033 * (((
1034 First Packet after OTAA Join
1035 )))
1036 * (((
1037 Every 24 hours since the first packet.
1038 )))
1039
1040 (((
1041 PID is default set to disable (0)
1042 )))
1043
1044 (% style="color:#4f81bd" %)**AT Command:**
1045
1046 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1047
1048
1049 (% style="color:#4f81bd" %)**Downlink Command:**
1050
1051 * **0xA800**  **~-~->** AT+PID=0
1052 * **0xA801**     **~-~->** AT+PID=1
1053
1054 == 4.4 Set Password ==
1055
1056 Feature: Set device password, max 9 digits
1057
1058 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1059
1060 [[image:image-20220523151052-5.png||_mstalt="428623" _mstvisible="3"]]
1061
1062
1063 (% style="color:#4f81bd" %)**Downlink Command:**
1064
1065 No downlink command for this feature.
1066
1067
1068
1069 == 4.5 Quit AT Command ==
1070
1071 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1072
1073 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1074
1075 [[image:image-20220523151132-6.png||_mstalt="428649" _mstvisible="3"]]
1076
1077
1078 (% style="color:#4f81bd" %)**Downlink Command:**
1079
1080 No downlink command for this feature.
1081
1082
1083
1084 == 4.6 Set to sleep mode ==
1085
1086 Feature: Set device to sleep mode
1087
1088 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1089 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1090
1091 (% _msthash="315251" _msttexthash="289783" style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1092
1093 [[image:image-20220523151218-7.png||_mstalt="430703" _mstvisible="3"]]
1094
1095
1096 (% _msthash="315252" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1097
1098 * There is no downlink command to set to Sleep mode.
1099
1100 == 4.7 Set system time ==
1101
1102 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1103
1104 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1105
1106 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1107
1108
1109 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1110
1111 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1112
1113
1114
1115 == 4.8 Set Time Sync Mode ==
1116
1117 (((
1118 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1119 )))
1120
1121 (((
1122 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.
1123 )))
1124
1125 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1126
1127 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1128
1129
1130 (% style="color:#4f81bd" %)**Downlink Command:**
1131
1132 0x28 01 ~/~/ Same As AT+SYNCMOD=1
1133 0x28 00 ~/~/ Same As AT+SYNCMOD=0
1134
1135
1136
1137 == 4.9 Set Time Sync Interval ==
1138
1139 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1140
1141 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1142
1143 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1144
1145
1146 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1147
1148 **0x29 0A** ~/~/ Same as AT+SYNCTDC=0x0A
1149
1150
1151
1152 == 4.10 Print data entries base on page. ==
1153
1154 Feature: Print the sector data from start page to stop page (max is 416 pages).
1155
1156 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1157
1158 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1159
1160
1161 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1162
1163 No downlink commands for feature
1164
1165
1166
1167 == 4.11 Print last few data entries. ==
1168
1169 Feature: Print the last few data entries
1170
1171 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1172
1173 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1174
1175
1176 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1177
1178 No downlink commands for feature
1179
1180
1181
1182 == 4.12 Clear Flash Record ==
1183
1184 Feature: Clear flash storage for data log feature.
1185
1186
1187 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1188
1189 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1190
1191
1192 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1193
1194 * Example: 0xA301 ~/~/Same as AT+CLRDTA
1195
1196 == 4.13 Auto Send None-ACK messages ==
1197
1198 (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
1199 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.
1200
1201 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1202
1203 (% _msthash="315396" _msttexthash="734682" _mstvisible="1" %)
1204 The default factory setting is 0
1205
1206 (% _mstvisible="1" border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1207 (% _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**
1208 (% _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
1209
1210 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1211
1212 * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1213
1214 = 5. Battery & How to replace =
1215
1216 == 5.1 Battery Type ==
1217
1218 (((
1219 (((
1220 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.
1221 )))
1222 )))
1223
1224 (((
1225
1226 )))
1227
1228 (((
1229 (((
1230 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1231 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1232 )))
1233 )))
1234
1235 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1236
1237
1238 == 5.2 Replace Battery ==
1239
1240 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.
1241
1242 [[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"]]
1243
1244
1245 == 5.3 Battery Life Analyze ==
1246
1247 (((
1248 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:
1249 [[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]]
1250 )))
1251
1252 (((
1253
1254 )))
1255
1256 (((
1257 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]]
1258 )))
1259
1260
1261
1262 = 6. FAQ =
1263
1264 == 6.1 How to use AT Command? ==
1265
1266 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.
1267
1268 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1269
1270
1271 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1272
1273 (% _msthash="506062" _msttexthash="1187732" %)
1274 **✓ (% style="background-color:yellow" %)USB to TTL GND <~-~->GND(%%)**
1275
1276 (% _msthash="506063" _msttexthash="1158313" %)**✓  **(% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1277
1278 (% _msthash="506064" _msttexthash="1175629" %)**✓  **(% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1279
1280 (% _msthash="506065" _msttexthash="1164696" %)**✓  **(% style="background-color:yellow" %)**USB to TTL 3.3V <~-~-> D-**
1281
1282
1283 (((
1284 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.
1285 )))
1286
1287
1288 Input password and ATZ to activate LHT65N,As shown below:
1289
1290 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1291
1292
1293 (% _msthash="506066" _msttexthash="544869" %)
1294 AT Command List is as below:
1295
1296 (% _msthash="506067" _msttexthash="361920" %)
1297 AT+<CMD>? :  Help on <CMD>
1298
1299 (% _msthash="506068" _msttexthash="243061" %)
1300 AT+<CMD> :  Run <CMD>
1301
1302 (% _msthash="506069" _msttexthash="704197" %)
1303 AT+<CMD>=<value> :  Set the value
1304
1305 (% _msthash="506070" _msttexthash="455676" %)
1306 AT+<CMD>=? :  Get the value
1307
1308 (% _msthash="506071" _msttexthash="670553" %)
1309 AT+DEBUG:  Set more info output
1310
1311 (% _msthash="506072" _msttexthash="485888" %)
1312 ATZ:  Trig a reset of the MCU
1313
1314 (% _msthash="506073" _msttexthash="2068872" %)
1315 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1316
1317 (% _msthash="506074" _msttexthash="689169" %)
1318 AT+DEUI:  Get or Set the Device EUI
1319
1320 (% _msthash="506075" _msttexthash="960414" %)
1321 AT+DADDR:  Get or Set the Device Address
1322
1323 (% _msthash="506076" _msttexthash="1079897" %)
1324 AT+APPKEY:  Get or Set the Application Key
1325
1326 (% _msthash="506077" _msttexthash="1326143" %)
1327 AT+NWKSKEY:  Get or Set the Network Session Key
1328
1329 (% _msthash="506078" _msttexthash="1573000" %)
1330 AT+APPSKEY:  Get or Set the Application Session Key
1331
1332 (% _msthash="506079" _msttexthash="1041729" %)
1333 AT+APPEUI:  Get or Set the Application EUI
1334
1335 (% _msthash="506080" _msttexthash="2104206" %)
1336 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1337
1338 (% _msthash="506081" _msttexthash="3369288" %)
1339 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1340
1341 (% _msthash="506082" _msttexthash="1894529" %)
1342 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1343
1344 (% _msthash="506083" _msttexthash="3864172" %)
1345 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1346
1347 (% _msthash="506084" _msttexthash="1712204" %)
1348 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1349
1350 (% _msthash="506085" _msttexthash="1281202" %)
1351 AT+RX2FQ:  Get or Set the Rx2 window frequency
1352
1353 (% _msthash="506086" _msttexthash="2796781" %)
1354 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1355
1356 (% _msthash="506087" _msttexthash="3285165" %)
1357 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1358
1359 (% _msthash="506088" _msttexthash="3286179" %)
1360 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1361
1362 (% _msthash="506089" _msttexthash="4703803" %)
1363 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1364
1365 (% _msthash="506090" _msttexthash="4704999" %)
1366 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1367
1368 (% _msthash="506091" _msttexthash="1528683" %)
1369 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1370
1371 (% _msthash="506092" _msttexthash="757185" %)
1372 AT+NWKID:  Get or Set the Network ID
1373
1374 (% _msthash="506093" _msttexthash="1156597" %)
1375 AT+FCU:  Get or Set the Frame Counter Uplink
1376
1377 (% _msthash="506094" _msttexthash="1273987" %)
1378 AT+FCD:  Get or Set the Frame Counter Downlink
1379
1380 (% _msthash="506095" _msttexthash="859222" %)
1381 AT+CLASS:  Get or Set the Device Class
1382
1383 (% _msthash="506096" _msttexthash="384852" %)
1384 AT+JOIN:  Join network
1385
1386 (% _msthash="506097" _msttexthash="548626" %)
1387 AT+NJS:  Get the join status
1388
1389 (% _msthash="506098" _msttexthash="2546206" %)
1390 AT+SENDB:  Send hexadecimal data along with the application port
1391
1392 (% _msthash="506099" _msttexthash="1932307" %)
1393 AT+SEND:  Send text data along with the application port
1394
1395 (% _msthash="506100" _msttexthash="3560557" %)
1396 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1397
1398 (% _msthash="506101" _msttexthash="1429701" %)
1399 AT+RECV:  Print last received data in raw format
1400
1401 (% _msthash="506102" _msttexthash="1735981" %)
1402 AT+VER:  Get current image version and Frequency Band
1403
1404 (% _msthash="506103" _msttexthash="1189474" %)
1405 AT+CFM:  Get or Set the confirmation mode (0-1)
1406
1407 (% _msthash="506104" _msttexthash="1718210" %)
1408 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1409
1410 (% _msthash="506105" _msttexthash="1339403" %)
1411 AT+SNR:  Get the SNR of the last received packet
1412
1413 (% _msthash="506106" _msttexthash="1452009" %)
1414 AT+RSSI:  Get the RSSI of the last received packet
1415
1416 (% _msthash="506107" _msttexthash="2768142" %)
1417 AT+TDC:  Get or set the application data transmission interval in ms
1418
1419 (% _msthash="506108" _msttexthash="1083914" %)
1420 AT+PORT:  Get or set the application port
1421
1422 (% _msthash="506109" _msttexthash="622440" %)
1423 AT+DISAT:  Disable AT commands
1424
1425 (% _msthash="506110" _msttexthash="868361" %)
1426 AT+PWORD: Set password, max 9 digits
1427
1428 (% _msthash="506111" _msttexthash="2210299" %)
1429 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1430
1431 (% _msthash="506112" _msttexthash="2113462" %)
1432 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1433
1434 (% _msthash="506113" _msttexthash="2087423" %)
1435 AT+PDTA:  Print the sector data from start page to stop page
1436
1437 (% _msthash="506114" _msttexthash="1063127" %)
1438 AT+PLDTA:  Print the last few sets of data
1439
1440 (% _msthash="506115" _msttexthash="1999426" %)
1441 AT+CLRDTA:  Clear the storage, record position back to 1st
1442
1443 (% _msthash="506116" _msttexthash="442130" %)
1444 AT+SLEEP:  Set sleep mode
1445
1446 (% _msthash="506117" _msttexthash="1080222" %)
1447 AT+EXT:  Get or Set external sensor model
1448
1449 (% _msthash="506118" _msttexthash="1309490" %)
1450 AT+BAT:  Get the current battery voltage in mV
1451
1452 (% _msthash="506119" _msttexthash="813891" %)
1453 AT+CFG:  Print all configurations
1454
1455 (% _msthash="506120" _msttexthash="551707" %)
1456 AT+WMOD:  Get or Set Work Mode
1457
1458 (% _msthash="506121" _msttexthash="2631499" %)
1459 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1460
1461 (% _msthash="506122" _msttexthash="3907150" %)
1462 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1463
1464 (% _msthash="506123" _msttexthash="854620" %)
1465 AT+SETCNT:  Set the count at present
1466
1467 (% _msthash="506124" _msttexthash="2554877" %)
1468 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1469
1470 (% _msthash="506125" _msttexthash="771849" %)
1471 AT+RPL:  Get or set response level
1472
1473 (% _msthash="506126" _msttexthash="1484314" %)
1474 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1475
1476 (% _msthash="506127" _msttexthash="741728" %)
1477 AT+LEAPSEC:  Get or Set Leap Second
1478
1479 (% _msthash="506128" _msttexthash="1694017" %)
1480 AT+SYNCMOD:  Get or Set time synchronization method
1481
1482 (% _msthash="506129" _msttexthash="2235948" %)
1483 AT+SYNCTDC:  Get or set time synchronization interval in day
1484
1485 (% _msthash="506130" _msttexthash="425542" %)
1486 AT+PID:  Get or set the PID
1487
1488
1489 == 6.2 Where to use AT commands and Downlink commands ==
1490
1491 (% _msthash="506131" _msttexthash="14585714" %)
1492 AT commands：
1493
1494 [[image:image-20220620153708-1.png||height="603" width="723"]]
1495
1496 (% _msthash="506132" _msttexthash="337922" %)
1497 Downlink commands:
1498
1499
1500 (% _msthash="506133" _msttexthash="33046" %)
1501 **TTN:**
1502
1503 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1504
1505
1506 (% _msthash="506134" _msttexthash="11113791" %)
1507 **Helium：**
1508
1509 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1510
1511
1512 (% _msthash="506135" _msttexthash="4159844" %)
1513 **Chirpstack:The downlink window will not be displayed until the network is accessed**
1514
1515 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1516
1517 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1518
1519
1520 (% _msthash="506136" _msttexthash="39286" %)
1521 **Aws:**
1522
1523 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1524
1525
1526
1527 == 6.3 How to change the uplink interval？ ==
1528
1529 [[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"]]
1530
1531
1532
1533 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1534
1535 [[image:image-20220615153355-1.png]]
1536
1537 [[image:1655802313617-381.png]]
1538
1539
1540 (((
1541 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.
1542 )))
1543
1544
1545 Input password and ATZ to activate LHT65N,As shown below:
1546
1547 [[image:image-20220615154519-3.png||height="672" width="807"]]
1548
1549
1550
1551 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1552
1553
1554 [[image:image-20220615153355-1.png]]
1555
1556
1557 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1558
1559 [[image:image-20220615170542-5.png]]
1560
1561
1562 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1563
1564 (% _msthash="506146" _msttexthash="52173160" %)
1565 First connect the four lines；(% style="display:none" %)
1566
1567 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1568
1569
1570 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1571
1572 [[image:image-20220621170938-2.png]]
1573
1574
1575 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1576
1577 [[image:image-20220615171334-6.png]]
1578
1579
1580 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1581
1582
1583 When this interface appears, it indicates that the download has been completed.
1584
1585 [[image:image-20220620160723-8.png]]
1586
1587
1588 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1589
1590
1591
1592 = 7. Order Info =
1593
1594
1595 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1596
1597 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1598
1599 (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1600
1601 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1602
1603 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1604
1605 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1606
1607 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1608
1609 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1610
1611 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1612
1613 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1614
1615 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1616
1617 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1618
1619 = 8. Packing Info =
1620
1621
1622 **Package Includes**:
1623
1624 * LHT65N Temperature & Humidity Sensor x 1
1625 * Optional external sensor
1626
1627 **Dimension and weight**:
1628
1629 * Device Size:  10 x 10 x 3.5 cm
1630 * Device Weight: 120.5g
1631
1632 = 9. Reference material =
1633
1634 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1635
1636 = 10. FCC Warning =
1637
1638 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1639
1640 (1) This device may not cause harmful interference；
1641
1642 (2) this device must accept any interference received, including interference that may cause undesired operation.