Skip to Content
Version 170.25 by Xiaoling on 2022/06/22 11:16
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="579" width="379"]]
3
4
5
6
7
8 (% _mstvisible="1" %)
9 (% _msthash="315238" _msttexthash="18964465" _mstvisible="3" %)**Table of Contents：**
10
11 {{toc/}}
12
13
14
15
16
17 = 1. Introduction =
18
19 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
20
21
22 (((
23 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
24 )))
25
26 (((
27 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
28 )))
29
30 (((
31 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
32 )))
33
34 (((
35 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
36 )))
37
38 (((
39 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
40 )))
41
42 (((
43 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
44 )))
45
46
47 == 1.2 Features ==
48
49 * Wall mountable
50 * LoRaWAN v1.0.3 Class A protocol
51 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
52 * AT Commands to change parameters
53 * Remote configure parameters via LoRaWAN Downlink
54 * Firmware upgradeable via program port
55 * Built-in 2400mAh battery for up to 10 years of use.
56 * Built-in Temperature & Humidity sensor
57 * Optional External Sensors
58 * Tri-color LED to indicate working status
59 * Datalog feature
60
61
62
63
64 == 1.3 Specification ==
65
66
67 **Built-in Temperature Sensor:**
68
69 * Resolution: 0.01 °C
70 * Accuracy Tolerance : Typ ±0.3 °C
71 * Long Term Drift: < 0.02 °C/yr
72 * Operating Range: -40 ~~ 85 °C
73
74 **Built-in Humidity Sensor:**
75
76 * Resolution: 0.04 %RH
77 * Accuracy Tolerance : Typ ±3 %RH
78 * Long Term Drift: < 0.02 °C/yr
79 * Operating Range: 0 ~~ 96 %RH
80
81 **External Temperature Sensor:**
82
83 * Resolution: 0.0625 °C
84 * ±0.5°C accuracy from -10°C to +85°C
85 * ±2°C accuracy from -55°C to +125°C
86 * Operating Range: -55 °C ~~ 125 °C
87
88 = 2. Connect LHT65N to IoT Server =
89
90 == 2.1 How does LHT65N work? ==
91
92 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.
93
94 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
95
96
97 == 2.2 How to Activate LHT65N? ==
98
99 The LHT65N has two working modes:
100
101 * (% 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.
102 * (% 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. 
103
104 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
105
106
107 [[image:image-20220515123819-1.png||_mstalt="430742" _mstvisible="3" height="379" width="317"]]
108
109 [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
110
111
112
113 == 2.3 Example to join LoRaWAN network ==
114
115 (% _msthash="315240" _msttexthash="9205482" _mstvisible="1" class="wikigeneratedid" %)
116 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.
117
118 (% _mstvisible="1" class="wikigeneratedid" %)
119 [[image:image-20220522232442-1.png||_mstalt="427830" _mstvisible="3" height="387" width="648"]]
120
121
122 (((
123 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:
124 )))
125
126
127
128 === 2.3.1 Step 1: Create Device n TTN ===
129
130 (((
131 Create a device in TTN V3 with the OTAA keys from LHT65N.
132 )))
133
134 (((
135 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
136 )))
137
138 [[image:image-20220617150003-1.jpeg]]
139
140 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
141
142 Add APP EUI in the application.
143
144
145 [[image:image-20220522232916-3.png||_mstalt="430495" _mstvisible="3"]]
146
147
148 [[image:image-20220522232932-4.png||_mstalt="430157" _mstvisible="3"]]
149
150
151 [[image:image-20220522232954-5.png||_mstalt="431847" _mstvisible="3"]]
152
153
154 Note: LHT65N use same payload as LHT65.
155
156
157 [[image:image-20220522233026-6.png||_mstalt="429403" _mstvisible="3"]]
158
159
160 Input APP EUI,  APP KEY and DEV EUI:
161
162
163 [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
164
165
166
167
168 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
169
170 (((
171 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.
172 )))
173
174 [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
175
176
177
178
179 == 2.4 Uplink Payload ==
180
181 (((
182 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.
183 )))
184
185 (((
186 After each uplink, the (% _mstvisible="3" style="color:blue" %)**BLUE LED**(%%) will blink once.
187 )))
188
189 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:426px" %)
190 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 97px;" %)(% _mstvisible="5" %)
191 (((
192 (% _mstvisible="6" %)
193 (% _msthash="1817478" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
194 )))|=(% _mstvisible="4" style="width: 39px;" %)(% _mstvisible="5" %)
195 (((
196 (% _mstvisible="6" %)
197 (% _msthash="1817479" _msttexthash="4550" _mstvisible="8" %)**2**
198 )))|=(% _mstvisible="4" style="width: 100px;" %)(% _mstvisible="5" %)
199 (((
200 (% _mstvisible="6" %)
201 (% _msthash="1817480" _msttexthash="4550" _mstvisible="8" %)**2**
202 )))|=(% _mstvisible="4" style="width: 77px;" %)(% _mstvisible="5" %)
203 (((
204 (% _mstvisible="6" %)
205 (% _msthash="1817481" _msttexthash="4550" _mstvisible="8" %)**2**
206 )))|=(% _mstvisible="4" style="width: 47px;" %)(% _mstvisible="5" %)
207 (((
208 (% _mstvisible="6" %)
209 (% _msthash="1817482" _msttexthash="4459" _mstvisible="8" %)**1**
210 )))|=(% _mstvisible="4" style="width: 51px;" %)(% _mstvisible="5" %)
211 (((
212 (% _mstvisible="6" %)
213 (% _msthash="1817483" _msttexthash="4732" _mstvisible="8" %)**4**
214 )))
215 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:97px" %)(% _mstvisible="5" %)
216 (((
217 (% _mstvisible="6" %)
218 (% _msthash="1817484" _msttexthash="60203" _mstvisible="8" %)**Value**
219 )))|(% _mstvisible="4" style="width:39px" %)(% _mstvisible="5" %)
220 (((
221 (% _mstvisible="6" %)
222 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo" _msthash="1817485" _msttexthash="22594" _mstvisible="7"]]
223 )))|(% _mstvisible="4" style="width:100px" %)(% _mstvisible="5" %)
224 (((
225 (% _mstvisible="6" %)
226 (((
227 (% _mstvisible="7" %)
228 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224742" _msttexthash="405769" _mstvisible="8"]]
229 )))
230 )))|(% _mstvisible="4" style="width:77px" %)(% _mstvisible="5" %)
231 (((
232 (% _mstvisible="6" %)
233 (((
234 (% _mstvisible="7" %)
235 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2224743" _msttexthash="105872" _mstvisible="8"]]
236 )))
237
238 (% _mstvisible="6" %)
239 (((
240 (% _mstvisible="7" %)
241 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224744" _msttexthash="117429" _mstvisible="8"]]
242 )))
243 )))|(% _mstvisible="4" style="width:47px" %)(% _mstvisible="5" %)
244 (((
245 (% _mstvisible="6" %)
246 [[Ext>>||anchor="H2.4.5Ext23" _msthash="1817486" _msttexthash="32331" _mstvisible="7"]] #
247 )))|(% _mstvisible="4" style="width:51px" %)(% _mstvisible="5" %)
248 (((
249 (% _mstvisible="6" %)
250 [[Ext value>>||anchor="H2.4.6Extvalue" _msthash="1817487" _msttexthash="116545" _mstvisible="7"]]
251 )))
252
253 * The First 6 bytes: has fix meanings for every LHT65N.
254 * The 7th byte (EXT #): defines the external sensor model.
255 * 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.)
256
257
258
259 === 2.4.1 Decoder in TTN V3 ===
260
261 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.
262
263 Below is the position to put the decoder and LHT65N decoder can be download from here:
264
265
266 [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0 >>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0||_msthash="315253" _msttexthash="3509064" _mstvisible="2"]]
267
268
269 [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
270
271
272
273
274 === 2.4.2 BAT-Battery Info ===
275
276 These two bytes of BAT include the battery state and the actually voltage
277
278 [[image:image-20220523152839-18.png||_mstalt="457613" _mstvisible="3"]]
279
280
281 [[image:image-20220522235639-1.png||_mstalt="431392" _mstvisible="3" height="139" width="727"]]
282
283
284 Check the battery voltage for LHT65N.
285
286 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
287 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
288
289
290 === 2.4.3 Built-in Temperature ===
291
292 [[image:image-20220522235639-2.png||_mstalt="431756" _mstvisible="3" height="138" width="722"]]
293
294 * Temperature:  0x0ABB/100=27.47℃
295
296 [[image:image-20220522235639-3.png||_mstalt="432120" _mstvisible="3"]]
297
298 * Temperature:  (0xF5C6-65536)/100=-26.18℃
299
300 === 2.4.4 Built-in Humidity ===
301
302 [[image:image-20220522235639-4.png||_mstalt="432484" _mstvisible="3" height="138" width="722"]]
303
304 * Humidity:    0x025C/10=60.4%
305
306 === 2.4.5 Ext # ===
307
308 Bytes for External Sensor:
309
310 [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
311
312
313
314 === 2.4.6 Ext value ===
315
316 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
317
318
319 [[image:image-20220522235639-5.png||_mstalt="432848" _mstvisible="3"]]
320
321
322 * DS18B20 temp=0x0ADD/100=27.81℃
323
324 The last 2 bytes of data are meaningless
325
326 [[image:image-20220522235639-6.png||_mstalt="433212" _mstvisible="3"]]
327
328
329 * External temperature= (0xF54F-65536)/100=-27.37℃
330
331 The last 2 bytes of data are meaningless
332
333 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
334
335
336
337 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
338
339 (((
340 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:
341 )))
342
343 (((
344
345 )))
346
347 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
348 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 96px;" %)(% _mstvisible="5" %)
349 (((
350 (% _mstvisible="6" %)
351 (% _msthash="1817488" _msttexthash="161122" _mstvisible="8" %)**Size(bytes)**
352 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
353 (((
354 (% _mstvisible="6" %)
355 (% _msthash="1817489" _msttexthash="4550" _mstvisible="8" %)**2**
356 )))|=(% _mstvisible="4" style="width: 99px;" %)(% _mstvisible="5" %)
357 (((
358 (% _mstvisible="6" %)
359 (% _msthash="1817490" _msttexthash="4550" _mstvisible="8" %)**2**
360 )))|=(% _mstvisible="4" style="width: 132px;" %)(% _mstvisible="5" %)
361 (((
362 (% _mstvisible="6" %)
363 (% _msthash="1817491" _msttexthash="4550" _mstvisible="8" %)**2**
364 )))|=(% _mstvisible="4" style="width: 54px;" %)(% _mstvisible="5" %)
365 (((
366 (% _mstvisible="6" %)
367 (% _msthash="1817492" _msttexthash="4459" _mstvisible="8" %)**1**
368 )))|=(% _mstvisible="4" style="width: 64px;" %)(% _mstvisible="5" %)
369 (((
370 (% _mstvisible="6" %)
371 (% _msthash="1817493" _msttexthash="4732" _mstvisible="8" %)**4**
372 )))
373 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:96px" %)(% _mstvisible="5" %)
374 (((
375 (% _mstvisible="6" %)
376 (% _msthash="1817494" _msttexthash="60203" _mstvisible="8" %)**Value**
377 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
378 (((
379 (% _mstvisible="6" %)
380 [[External temperature>>||anchor="H4.2SetExternalSensorMode" _msthash="1817495" _msttexthash="426517" _mstvisible="7"]]
381 )))|(% _mstvisible="4" style="width:99px" %)(% _mstvisible="5" %)
382 (((
383 (% _mstvisible="6" %)
384 (((
385 (% _mstvisible="7" %)
386 [[Built-In>>||anchor="H2.4.3Built-inTemperature" _msthash="2224745" _msttexthash="100464" _mstvisible="8"]]
387 )))
388
389 (% _mstvisible="6" %)
390 (((
391 (% _mstvisible="7" %)
392 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2224746" _msttexthash="184041" _mstvisible="8"]]
393 )))
394 )))|(% _mstvisible="4" style="width:132px" %)(% _mstvisible="5" %)
395 (((
396 (% _mstvisible="6" %)
397 (((
398 (% _msthash="2224747" _msttexthash="136331" _mstvisible="7" %)
399 BAT Status &
400 )))
401
402 (% _mstvisible="6" %)
403 (((
404 (% _mstvisible="7" %)
405 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2224748" _msttexthash="311181" _mstvisible="8"]]
406 )))
407 )))|(% _mstvisible="4" style="width:54px" %)(% _mstvisible="5" %)
408 (((
409 (% _msthash="1817496" _msttexthash="147225" _mstvisible="6" %)
410 Status & Ext
411 )))|(% _mstvisible="4" style="width:64px" %)(% _mstvisible="5" %)
412 (((
413 (% _mstvisible="6" %)
414 (((
415 (% _mstvisible="7" %)
416 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2224749" _msttexthash="227175" _mstvisible="8"]]
417 )))
418 )))
419
420 (% _mstvisible="1" %)
421 * (% _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**
422
423 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
424 (% _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]
425 (% _mstvisible="3" %)|(% _msthash="1230921" _msttexthash="60203" _mstvisible="4" style="width:65px" %)Value|(% _mstvisible="4" style="width:267px" %)(% _mstvisible="5" %)
426 (((
427 (% _msthash="1817497" _msttexthash="128427" _mstvisible="6" %)
428 BAT Status
429
430 (% _msthash="1817498" _msttexthash="472784" _mstvisible="6" %)
431 00(b): Ultra Low ( BAT <= 2.50v)
432
433 (% _msthash="1817499" _msttexthash="483678" _mstvisible="6" %)
434 01(b): Low  (2.50v <=BAT <= 2.55v)
435
436 (% _msthash="1817500" _msttexthash="440791" _mstvisible="6" %)
437 10(b): OK   (2.55v <= BAT <=2.65v)
438
439 (% _msthash="1817501" _msttexthash="334191" _mstvisible="6" %)
440 11(b): Good   (BAT >= 2.65v)
441 )))|(% _mstvisible="4" style="width:134px" %)(% _mstvisible="5" %)
442 (((
443 (% _mstvisible="6" %)
444 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="1817502" _msttexthash="311181" _mstvisible="7"]]
445
446 (% _mstvisible="6" %)
447
448 )))
449
450 * (% _msthash="504956" _msttexthash="245037" _mstvisible="4" %)**Status & Ext Byte**
451
452 [[image:image-20220523152434-16.png||_mstalt="453921" _mstvisible="3"]]
453
454 * Poll Message Flag:  1: This message is a poll message reply, 0: means this is a normal uplink.
455 * 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.
456 * 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)
457
458
459 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
460
461 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
462
463 be used to power the external ADC sensor; user can control the power on time for this
464
465 sensor by setting:
466
467 AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
468
469
470
471 == 2.5 Show data on Datacake ==
472
473 (((
474 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:
475 )))
476
477 (((
478
479 )))
480
481 (((
482 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
483 )))
484
485 (((
486 (% 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.
487 )))
488
489 (((
490
491 )))
492
493 (((
494 Add Datacake:
495 )))
496
497
498 [[image:image-20220523000825-7.png||_mstalt="429884" _mstvisible="3" height="262" width="583"]]
499
500
501
502 Select default key as Access Key:
503
504
505 [[image:image-20220523000825-8.png||_mstalt="430248" _mstvisible="3" height="453" width="406"]]
506
507
508 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/||_mstvisible="2"]]) , add LHT65 device.
509
510
511 [[image:image-20220523000825-9.png||_mstalt="430612" _mstvisible="3" height="366" width="392"]]
512
513
514 [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
515
516
517
518 == 2.6 Datalog Feature ==
519
520 (((
521 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.
522 )))
523
524
525
526 === 2.6.1 Ways to get datalog via LoRaWAN ===
527
528 There are two methods:
529
530 1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
531 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.
532
533
534
535 === 2.6.2 Unix TimeStamp ===
536
537
538 LHT65N uses Unix TimeStamp format based on
539
540
541 [[image:image-20220523001219-11.png||_mstalt="450450" _mstvisible="3" height="97" width="627"]]
542
543
544
545 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/||_mstvisible="3"]] :
546
547 Below is the converter example
548
549 [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
550
551 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
552
553
554
555 === 2.6.3 Set Device Time ===
556
557 There are two ways to set device's time:
558
559 **~1. Through LoRaWAN MAC Command (Default settings)**
560
561 User need to set SYNCMOD=1 to enable sync time via MAC command.
562
563 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).
564
565 (% 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.
566
567
568 **2. Manually Set Time**
569
570 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
571
572
573
574 === 2.6.4 Poll sensor value ===
575
576 User can poll sensor value based on timestamps from the server. Below is the downlink command.
577
578 [[image:image-20220523152302-15.png||_mstalt="451581" _mstvisible="3"]]
579
580
581 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.
582
583 For example, downlink command **31 5FC5F350 5FC6 0160 05**
584
585 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00’s data
586
587 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
588
589
590
591 === 2.6.5 Datalog Uplink payload ===
592
593 (% _msthash="315267" _msttexthash="2245087" _mstvisible="1" %)
594 The Datalog poll reply uplink will use below payload format.
595
596 (% _mstvisible="1" %)
597 (((
598 (% _mstvisible="2" %)
599 (% _msthash="506080" _msttexthash="451581" _mstvisible="4" %)**Retrieval data payload**
600 )))
601
602 (% _mstvisible="1" border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
603 (% _mstvisible="3" %)|=(% _mstvisible="4" style="width: 93px;" %)(% _mstvisible="5" %)
604 (((
605 (% _mstvisible="6" %)
606 (((
607 (% _mstvisible="7" %)
608 (% _msthash="2224750" _msttexthash="161122" _mstvisible="9" %)**Size(bytes)**
609 )))
610 )))|=(% _mstvisible="4" style="width: 71px;" %)(% _mstvisible="5" %)
611 (((
612 (% _mstvisible="6" %)
613 (((
614 (% _mstvisible="7" %)
615 (% _msthash="2224751" _msttexthash="4550" _mstvisible="9" %)**2**
616 )))
617 )))|=(% _mstvisible="4" style="width: 102px;" %)(% _mstvisible="5" %)
618 (((
619 (% _mstvisible="6" %)
620 (((
621 (% _mstvisible="7" %)
622 (% _msthash="2224752" _msttexthash="4550" _mstvisible="9" %)**2**
623 )))
624 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
625 (((
626 (% _mstvisible="6" %)
627 (((
628 (% _mstvisible="7" %)
629 (% _msthash="2224753" _msttexthash="4550" _mstvisible="9" %)**2**
630 )))
631 )))|=(% _mstvisible="4" style="width: 86px;" %)(% _mstvisible="5" %)
632 (((
633 (% _mstvisible="6" %)
634 (((
635 (% _mstvisible="7" %)
636 (% _msthash="2224754" _msttexthash="4459" _mstvisible="9" %)**1**
637 )))
638 )))|=(% _mstvisible="4" style="width: 48px;" %)(% _mstvisible="5" %)
639 (((
640 (% _mstvisible="6" %)
641 (((
642 (% _mstvisible="7" %)
643 (% _msthash="2224755" _msttexthash="4732" _mstvisible="9" %)**4**
644 )))
645 )))
646 (% _mstvisible="3" %)|(% _mstvisible="4" style="width:93px" %)(% _mstvisible="5" %)
647 (((
648 (% _mstvisible="6" %)
649 (((
650 (% _mstvisible="7" %)
651 (% _msthash="2224756" _msttexthash="60203" _mstvisible="9" %)**Value**
652 )))
653 )))|(% _mstvisible="4" style="width:71px" %)(% _mstvisible="5" %)
654 (((
655 (% _mstvisible="6" %)
656 (((
657 (% _mstvisible="7" %)
658 [[External sensor data>>||anchor="H2.4.6Extvalue" _msthash="2224757" _msttexthash="386672" _mstvisible="8"]]
659 )))
660 )))|(% _mstvisible="4" style="width:102px" %)(% _mstvisible="5" %)
661 (((
662 (% _mstvisible="6" %)
663 (((
664 (% _mstvisible="7" %)
665 (((
666 (% _mstvisible="8" %)
667 [[Built In>>||anchor="H2.4.3Built-inTemperature" _msthash="2671864" _msttexthash="91065" _mstvisible="9"]]
668 )))
669 )))
670
671 (% _mstvisible="6" %)
672 (((
673 (% _mstvisible="7" %)
674 (((
675 (% _mstvisible="8" %)
676 [[Temperature>>||anchor="H2.4.3Built-inTemperature" _msthash="2671865" _msttexthash="184041" _mstvisible="9"]]
677 )))
678 )))
679 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
680 (((
681 (% _mstvisible="6" %)
682 (((
683 (% _mstvisible="7" %)
684 (((
685 (% _mstvisible="8" %)
686 [[Built-in>>||anchor="H2.4.4Built-inHumidity" _msthash="2671866" _msttexthash="105872" _mstvisible="9"]]
687 )))
688 )))
689
690 (% _mstvisible="6" %)
691 (((
692 (% _mstvisible="7" %)
693 (((
694 (% _mstvisible="8" %)
695 [[Humidity>>||anchor="H2.4.4Built-inHumidity" _msthash="2671867" _msttexthash="117429" _mstvisible="9"]]
696 )))
697 )))
698 )))|(% _mstvisible="4" style="width:86px" %)(% _mstvisible="5" %)
699 (((
700 (% _mstvisible="6" %)
701 (((
702 (% _msthash="2224758" _msttexthash="390390" _mstvisible="7" %)
703 Poll message flag & Ext
704 )))
705 )))|(% _mstvisible="4" style="width:48px" %)(% _mstvisible="5" %)
706 (((
707 (% _mstvisible="6" %)
708 (((
709 (% _mstvisible="7" %)
710 (((
711 (% _mstvisible="8" %)
712 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp" _msthash="2671868" _msttexthash="227175" _mstvisible="9"]]
713 )))
714 )))
715
716 (% _mstvisible="6" %)
717 (((
718 (% _mstvisible="7" %)
719 (((
720 (% _mstvisible="8" %)
721
722 )))
723 )))
724 )))
725
726 (% _mstvisible="1" %)
727 (% _msthash="315268" _msttexthash="390390" _mstvisible="3" %)**Poll message flag & Ext**
728
729 (% _mstvisible="1" %)
730 [[image:image-20220523152208-14.png||_mstalt="452920" _mstvisible="3"]]
731
732 (% _mstvisible="1" %)
733 (((
734 (% _mstvisible="2" %)
735 (((
736 (% _msthash="736723" _msttexthash="2005003" _mstvisible="3" %)
737 Poll Message Flag: 1: This message is a poll message reply.
738 )))
739 )))
740
741 (% _mstvisible="1" %)
742 * (% _mstvisible="3" %)
743 (((
744 (% _mstvisible="4" %)
745 (((
746 (% _msthash="1197157" _msttexthash="561548" _mstvisible="5" %)
747 Poll Message Flag is set to 1.
748 )))
749 )))
750 * (% _mstvisible="3" %)
751 (((
752 (% _mstvisible="4" %)
753 (((
754 (% _msthash="1197158" _msttexthash="9284964" _mstvisible="5" %)
755 Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
756 )))
757 )))
758
759 (% _mstvisible="1" %)
760 (((
761 (% _mstvisible="2" %)
762 (((
763 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
764
765
766 (% _msthash="736724" _msttexthash="2242344" _mstvisible="3" %)
767 For example, in US915 band, the max payload for different DR is:
768 )))
769 )))
770
771 (% _mstvisible="1" %)
772 (((
773 (% _mstvisible="2" %)
774 (((
775 (% _msthash="736725" _msttexthash="1065532" _mstvisible="3" %)
776 a) DR0: max is 11 bytes so one entry of data
777 )))
778 )))
779
780 (% _mstvisible="1" %)
781 (((
782 (% _mstvisible="2" %)
783 (((
784 (% _msthash="736726" _msttexthash="3265665" _mstvisible="3" %)
785 b) DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
786 )))
787 )))
788
789 (% _mstvisible="1" %)
790 (((
791 (% _mstvisible="2" %)
792 (((
793 (% _msthash="736727" _msttexthash="1454115" _mstvisible="3" style="text-align: left;" %)
794 c) DR2: total payload includes 11 entries of data
795 )))
796 )))
797
798 (% _mstvisible="1" %)
799 (((
800 (% _mstvisible="2" %)
801 (((
802 (% _msthash="736728" _msttexthash="1483924" _mstvisible="3" style="text-align: left;" %)
803 d) DR3: total payload includes 22 entries of data.
804 )))
805 )))
806
807 (% _mstvisible="1" %)
808 (((
809 (% _mstvisible="2" %)
810 (((
811 (% _msthash="736729" _msttexthash="5848349" _mstvisible="3" style="text-align: left;" %)
812 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
813 )))
814 )))
815
816
817 (% _mstvisible="1" style="text-align: left;" %)
818 (% _msthash="315269" _msttexthash="104767" _mstvisible="3" %)**Example:**
819
820 (% _msthash="315270" _msttexthash="913822" _mstvisible="1" style="text-align: left;" %)
821 If LHT65N has below data inside Flash:
822
823 (% _mstvisible="1" %)
824 [[image:image-20220523144455-1.png||_mstalt="430040" _mstvisible="3" height="335" width="735"]]
825
826 (% _mstvisible="1" %)
827 (((
828 (% _msthash="506081" _msttexthash="1663961" _mstvisible="2" style="text-align: left;" %)
829 If user sends below downlink command: (% _mstvisible="3" style="background-color:yellow" %)3160065F9760066DA705
830 )))
831
832 (% _mstvisible="1" %)
833 (((
834 (% _msthash="506082" _msttexthash="1092494" _mstvisible="2" style="text-align: left;" %)
835 Where : Start time: 60065F97 = time 21/1/19 04:27:03
836 )))
837
838 (% _mstvisible="1" %)
839 (((
840 (% _msthash="506083" _msttexthash="737269" _mstvisible="2" style="text-align: left;" %)
841 Stop time 60066DA7= time 21/1/19 05:27:(% _msthash="903005" _msttexthash="9672" _mstvisible="2" %)03
842 )))
843
844 (% _mstvisible="1" %)
845 (((
846 (% _mstvisible="2" %)
847
848 )))
849
850 (% _mstvisible="1" %)
851 (((
852 (% _msthash="506084" _msttexthash="751218" _mstvisible="2" style="text-align: left;" %)
853 LHT65N will uplink this payload.
854 )))
855
856 (% _mstvisible="1" %)
857 [[image:image-20220523001219-13.png||_mstalt="451204" _mstvisible="3" height="421" style="text-align:left" width="727"]]
858
859 (% _msthash="315271" _msttexthash="12012546" _mstvisible="1" style="text-align: left;" %)
860 7FFF089801464160065F977FFF088E014B41600660097FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
861
862 (% _msthash="315237" _msttexthash="1385839" %)
863 Where the first 11 bytes is for the first entry:
864
865 (% _msthash="315238" _msttexthash="274846" %)
866 7FFF089801464160065F97
867
868 (% _msthash="315239" _msttexthash="617435" %)
869 Ext sensor data=0x7FFF/100=327.67
870
871 (% _msthash="315240" _msttexthash="270543" %)
872 Temp=0x0898/100=22.00
873
874 (% _msthash="315241" _msttexthash="211783" %)
875 Hum=0x0146/10=32.6
876
877 (% _msthash="315242" _msttexthash="1569776" %)
878 poll message flag & Ext=0x41,means reply data,Ext=1
879
880 (% _msthash="315243" _msttexthash="1120509" %)
881 Unix time is 0x60065F97=1611030423s=21/1/19 04:27:03
882
883
884
885 == 2.7 Alarm Mode ==
886
887 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.
888
889 (% style="color:red" %)Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.
890
891 **AT COMMAND FOR ALARM MODE:**
892
893 (% _mstvisible="1" class="box infomessage" %)
894 (((
895 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled)
896
897 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
898
899 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
900
901 **AT+ARTEMP=？ **:  Gets the alarm range of the internal temperature sensor(% _mstvisible="3" style="display:none" %)
902
903 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
904 )))
905
906
907
908
909 == 2.8 LED Indicator ==
910
911 The LHT65 has a triple color LED which for easy showing different stage .
912
913 While user press ACT button, the LED will work as per LED status with ACT button.
914
915 In a normal working state:
916
917 * For each uplink, the BLUE LED or RED LED will blink once.
918 BLUE LED when external sensor is connected.
919 * RED LED when external sensor is not connected
920 * For each success downlink, the PURPLE LED will blink once
921
922
923
924 == 2.9 installation ==
925
926 (% _mstvisible="1" %)
927 [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
928
929
930
931 = 3. Sensors and Accessories =
932
933 == 3.1 E2 Extension Cable ==
934
935 [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
936
937 1m long breakout cable for LHT65N
938
939 [[image:image-20220619092421-3.png||height="371" width="529"]]
940
941
942
943
944 == 3.2 E3 Temperature Probe ==
945
946
947 [[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"]]
948
949
950 Temperature sensor with 2 meters cable long
951
952 * Resolution: 0.0625 °C
953 * ±0.5°C accuracy from -10°C to +85°C
954 * ±2°C accuracy from -55°C to +125°C
955 * Operating Range: -40 ~~ 125 °C
956 * Working voltage 2.35v ~~ 5v
957
958
959
960 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
961
962 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
963
964 * AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
965
966 * LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
967
968 There are two kinds of commands to configure LHT65N, they are:
969
970 * (% style="color:#4f81bd" %)**General Commands**.
971
972 These commands are to configure:
973
974 1. General system settings like: uplink interval.
975 1. LoRaWAN protocol & radio-related commands.
976
977 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]]
978
979 * (% style="color:#4f81bd" %)**Commands special design for LHT65N**
980
981 These commands are only valid for LHT65N, as below:
982
983
984 == 4.1 Set Transmit Interval Time ==
985
986 Feature: Change LoRaWAN End Node Transmit Interval.
987
988 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
989
990 [[image:image-20220523150701-2.png||_mstalt="427453" _mstvisible="3"]]
991
992
993 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
994
995 Format: Command Code (0x01) followed by 3 bytes time value.
996
997 If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
998
999 * **Example 1**: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1000
1001 * **Example 2**: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1002
1003 == 4.2 Set External Sensor Mode ==
1004
1005 Feature: Change External Sensor Mode.
1006
1007 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1008
1009 [[image:image-20220523150759-3.png||_mstalt="432146" _mstvisible="3"]]
1010
1011
1012 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1013
1014 Total bytes: 2 ~~ 5 bytes
1015
1016 **Example:**
1017
1018 * 0xA201: Set external sensor type to E1
1019
1020 * 0xA209: Same as AT+EXT=9
1021
1022 * 0xA20702003c: Same as AT+SETCNT=60
1023
1024
1025 == 4.3 Enable/Disable uplink Temperature probe ID ==
1026
1027 (((
1028 Feature: If PID is enabled, device will send the temperature probe ID on:
1029 )))
1030
1031 * (((
1032 First Packet after OTAA Join
1033 )))
1034 * (((
1035 Every 24 hours since the first packet.
1036 )))
1037
1038 (((
1039 PID is default set to disable (0)
1040 )))
1041
1042 (% style="color:#4f81bd" %)**AT Command:**
1043
1044 [[image:image-20220523150928-4.png||_mstalt="431821" _mstvisible="3"]]
1045
1046
1047 (% style="color:#4f81bd" %)**Downlink Command:**
1048
1049 * **0xA800**  **~-~->** AT+PID=0
1050 * **0xA801**     **~-~->** AT+PID=1
1051
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
1100
1101 == 4.7 Set system time ==
1102
1103 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1104
1105 (% _msthash="315253" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1106
1107 [[image:image-20220523151253-8.png||_mstalt="430677" _mstvisible="3"]]
1108
1109
1110 (% _msthash="315254" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1111
1112 0x306007806000 ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1113
1114
1115
1116 == 4.8 Set Time Sync Mode ==
1117
1118 (((
1119 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1120 )))
1121
1122 (((
1123 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.
1124 )))
1125
1126 (% _msthash="506058" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1127
1128 [[image:image-20220523151336-9.png||_mstalt="431717" _mstvisible="3"]]
1129
1130
1131 (% style="color:#4f81bd" %)**Downlink Command:**
1132
1133 0x28 01 ~/~/ Same As AT+SYNCMOD=1
1134 0x28 00 ~/~/ Same As AT+SYNCMOD=0
1135
1136
1137
1138 == 4.9 Set Time Sync Interval ==
1139
1140 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1141
1142 (% _msthash="315256" _msttexthash="137488" style="color:#4f81bd" %)**AT Command:**
1143
1144 [[image:image-20220523151411-10.png||_mstalt="449696" _mstvisible="3"]]
1145
1146
1147 (% _msthash="315257" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1148
1149 **0x29 0A** ~/~/ Same as AT+SYNCTDC=0x0A
1150
1151
1152
1153 == 4.10 Print data entries base on page. ==
1154
1155 Feature: Print the sector data from start page to stop page (max is 416 pages).
1156
1157 (% _msthash="315258" _msttexthash="264953" style="color:#4f81bd" %)**AT Command: AT+PDTA**
1158
1159 [[image:image-20220523151450-11.png||_mstalt="451035" _mstvisible="3"]]
1160
1161
1162 (% _msthash="315259" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1163
1164 No downlink commands for feature
1165
1166
1167
1168 == 4.11 Print last few data entries. ==
1169
1170 Feature: Print the last few data entries
1171
1172 (% _msthash="315260" _msttexthash="288522" style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1173
1174 [[image:image-20220523151524-12.png||_mstalt="452101" _mstvisible="3"]]
1175
1176
1177 (% _msthash="315261" _msttexthash="298038" style="color:#4f81bd" %)**Downlink Command:**
1178
1179 No downlink commands for feature
1180
1181
1182
1183 == 4.12 Clear Flash Record ==
1184
1185 Feature: Clear flash storage for data log feature.
1186
1187
1188 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1189
1190 [[image:image-20220523151556-13.png||_mstalt="454129" _mstvisible="3"]]
1191
1192
1193 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1194
1195 * Example: 0xA301 ~/~/Same as AT+CLRDTA
1196
1197
1198
1199 == 4.13 Auto Send None-ACK messages ==
1200
1201 (% _msthash="315394" _msttexthash="51837149" _mstvisible="1" %)
1202 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.
1203
1204 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1205
1206 (% _msthash="315396" _msttexthash="734682" _mstvisible="1" %)
1207 The default factory setting is 0
1208
1209 (% _mstvisible="1" border="1" style="background-color:#ffffcc; color:green; width:450px" %)
1210 (% _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**
1211 (% _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
1212
1213 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1214
1215 * Example: 0x3401 ~/~/Same as AT+PNACKMD=1
1216
1217
1218 = 5. Battery & How to replace =
1219
1220 == 5.1 Battery Type ==
1221
1222 (((
1223 (((
1224 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.
1225 )))
1226 )))
1227
1228 (((
1229
1230 )))
1231
1232 (((
1233 (((
1234 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1235 [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1236 )))
1237 )))
1238
1239 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1240
1241
1242 == 5.2 Replace Battery ==
1243
1244 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.
1245
1246 [[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"]]
1247
1248
1249 == 5.3 Battery Life Analyze ==
1250
1251 (((
1252 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:
1253 [[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]]
1254 )))
1255
1256 (((
1257
1258 )))
1259
1260 (((
1261 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]]
1262 )))
1263
1264
1265
1266 = 6. FAQ =
1267
1268 == 6.1 How to use AT Command? ==
1269
1270 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.
1271
1272 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1273
1274
1275 (% _msthash="506061" _msttexthash="170755" %)**Connection:**
1276
1277 (% _msthash="506062" _msttexthash="1187732" %)
1278 **✓ (% style="background-color:yellow" %)USB to TTL GND <~-~->GND(%%)**
1279
1280 (% _msthash="506063" _msttexthash="1158313" %)**✓  **(% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1281
1282 (% _msthash="506064" _msttexthash="1175629" %)**✓  **(% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1283
1284 (% _msthash="506065" _msttexthash="1164696" %)**✓  **(% style="background-color:yellow" %)**USB to TTL 3.3V <~-~-> D-**
1285
1286
1287 (((
1288 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.
1289 )))
1290
1291
1292 Input password and ATZ to activate LHT65N,As shown below:
1293
1294 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1295
1296
1297 (% _msthash="506066" _msttexthash="544869" %)
1298 AT Command List is as below:
1299
1300 (% _msthash="506067" _msttexthash="361920" %)
1301 AT+<CMD>? :  Help on <CMD>
1302
1303 (% _msthash="506068" _msttexthash="243061" %)
1304 AT+<CMD> :  Run <CMD>
1305
1306 (% _msthash="506069" _msttexthash="704197" %)
1307 AT+<CMD>=<value> :  Set the value
1308
1309 (% _msthash="506070" _msttexthash="455676" %)
1310 AT+<CMD>=? :  Get the value
1311
1312 (% _msthash="506071" _msttexthash="670553" %)
1313 AT+DEBUG:  Set more info output
1314
1315 (% _msthash="506072" _msttexthash="485888" %)
1316 ATZ:  Trig a reset of the MCU
1317
1318 (% _msthash="506073" _msttexthash="2068872" %)
1319 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1320
1321 (% _msthash="506074" _msttexthash="689169" %)
1322 AT+DEUI:  Get or Set the Device EUI
1323
1324 (% _msthash="506075" _msttexthash="960414" %)
1325 AT+DADDR:  Get or Set the Device Address
1326
1327 (% _msthash="506076" _msttexthash="1079897" %)
1328 AT+APPKEY:  Get or Set the Application Key
1329
1330 (% _msthash="506077" _msttexthash="1326143" %)
1331 AT+NWKSKEY:  Get or Set the Network Session Key
1332
1333 (% _msthash="506078" _msttexthash="1573000" %)
1334 AT+APPSKEY:  Get or Set the Application Session Key
1335
1336 (% _msthash="506079" _msttexthash="1041729" %)
1337 AT+APPEUI:  Get or Set the Application EUI
1338
1339 (% _msthash="506080" _msttexthash="2104206" %)
1340 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1341
1342 (% _msthash="506081" _msttexthash="3369288" %)
1343 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1344
1345 (% _msthash="506082" _msttexthash="1894529" %)
1346 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1347
1348 (% _msthash="506083" _msttexthash="3864172" %)
1349 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1350
1351 (% _msthash="506084" _msttexthash="1712204" %)
1352 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1353
1354 (% _msthash="506085" _msttexthash="1281202" %)
1355 AT+RX2FQ:  Get or Set the Rx2 window frequency
1356
1357 (% _msthash="506086" _msttexthash="2796781" %)
1358 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1359
1360 (% _msthash="506087" _msttexthash="3285165" %)
1361 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1362
1363 (% _msthash="506088" _msttexthash="3286179" %)
1364 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1365
1366 (% _msthash="506089" _msttexthash="4703803" %)
1367 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1368
1369 (% _msthash="506090" _msttexthash="4704999" %)
1370 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1371
1372 (% _msthash="506091" _msttexthash="1528683" %)
1373 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1374
1375 (% _msthash="506092" _msttexthash="757185" %)
1376 AT+NWKID:  Get or Set the Network ID
1377
1378 (% _msthash="506093" _msttexthash="1156597" %)
1379 AT+FCU:  Get or Set the Frame Counter Uplink
1380
1381 (% _msthash="506094" _msttexthash="1273987" %)
1382 AT+FCD:  Get or Set the Frame Counter Downlink
1383
1384 (% _msthash="506095" _msttexthash="859222" %)
1385 AT+CLASS:  Get or Set the Device Class
1386
1387 (% _msthash="506096" _msttexthash="384852" %)
1388 AT+JOIN:  Join network
1389
1390 (% _msthash="506097" _msttexthash="548626" %)
1391 AT+NJS:  Get the join status
1392
1393 (% _msthash="506098" _msttexthash="2546206" %)
1394 AT+SENDB:  Send hexadecimal data along with the application port
1395
1396 (% _msthash="506099" _msttexthash="1932307" %)
1397 AT+SEND:  Send text data along with the application port
1398
1399 (% _msthash="506100" _msttexthash="3560557" %)
1400 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1401
1402 (% _msthash="506101" _msttexthash="1429701" %)
1403 AT+RECV:  Print last received data in raw format
1404
1405 (% _msthash="506102" _msttexthash="1735981" %)
1406 AT+VER:  Get current image version and Frequency Band
1407
1408 (% _msthash="506103" _msttexthash="1189474" %)
1409 AT+CFM:  Get or Set the confirmation mode (0-1)
1410
1411 (% _msthash="506104" _msttexthash="1718210" %)
1412 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1413
1414 (% _msthash="506105" _msttexthash="1339403" %)
1415 AT+SNR:  Get the SNR of the last received packet
1416
1417 (% _msthash="506106" _msttexthash="1452009" %)
1418 AT+RSSI:  Get the RSSI of the last received packet
1419
1420 (% _msthash="506107" _msttexthash="2768142" %)
1421 AT+TDC:  Get or set the application data transmission interval in ms
1422
1423 (% _msthash="506108" _msttexthash="1083914" %)
1424 AT+PORT:  Get or set the application port
1425
1426 (% _msthash="506109" _msttexthash="622440" %)
1427 AT+DISAT:  Disable AT commands
1428
1429 (% _msthash="506110" _msttexthash="868361" %)
1430 AT+PWORD: Set password, max 9 digits
1431
1432 (% _msthash="506111" _msttexthash="2210299" %)
1433 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1434
1435 (% _msthash="506112" _msttexthash="2113462" %)
1436 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1437
1438 (% _msthash="506113" _msttexthash="2087423" %)
1439 AT+PDTA:  Print the sector data from start page to stop page
1440
1441 (% _msthash="506114" _msttexthash="1063127" %)
1442 AT+PLDTA:  Print the last few sets of data
1443
1444 (% _msthash="506115" _msttexthash="1999426" %)
1445 AT+CLRDTA:  Clear the storage, record position back to 1st
1446
1447 (% _msthash="506116" _msttexthash="442130" %)
1448 AT+SLEEP:  Set sleep mode
1449
1450 (% _msthash="506117" _msttexthash="1080222" %)
1451 AT+EXT:  Get or Set external sensor model
1452
1453 (% _msthash="506118" _msttexthash="1309490" %)
1454 AT+BAT:  Get the current battery voltage in mV
1455
1456 (% _msthash="506119" _msttexthash="813891" %)
1457 AT+CFG:  Print all configurations
1458
1459 (% _msthash="506120" _msttexthash="551707" %)
1460 AT+WMOD:  Get or Set Work Mode
1461
1462 (% _msthash="506121" _msttexthash="2631499" %)
1463 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1464
1465 (% _msthash="506122" _msttexthash="3907150" %)
1466 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1467
1468 (% _msthash="506123" _msttexthash="854620" %)
1469 AT+SETCNT:  Set the count at present
1470
1471 (% _msthash="506124" _msttexthash="2554877" %)
1472 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1473
1474 (% _msthash="506125" _msttexthash="771849" %)
1475 AT+RPL:  Get or set response level
1476
1477 (% _msthash="506126" _msttexthash="1484314" %)
1478 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1479
1480 (% _msthash="506127" _msttexthash="741728" %)
1481 AT+LEAPSEC:  Get or Set Leap Second
1482
1483 (% _msthash="506128" _msttexthash="1694017" %)
1484 AT+SYNCMOD:  Get or Set time synchronization method
1485
1486 (% _msthash="506129" _msttexthash="2235948" %)
1487 AT+SYNCTDC:  Get or set time synchronization interval in day
1488
1489 (% _msthash="506130" _msttexthash="425542" %)
1490 AT+PID:  Get or set the PID
1491
1492
1493 == 6.2 Where to use AT commands and Downlink commands ==
1494
1495 (% _msthash="506131" _msttexthash="14585714" %)
1496 AT commands：
1497
1498 [[image:image-20220620153708-1.png||height="603" width="723"]]
1499
1500 (% _msthash="506132" _msttexthash="337922" %)
1501 Downlink commands:
1502
1503
1504 (% _msthash="506133" _msttexthash="33046" %)
1505 **TTN:**
1506
1507 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1508
1509
1510 (% _msthash="506134" _msttexthash="11113791" %)
1511 **Helium：**
1512
1513 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1514
1515
1516 (% _msthash="506135" _msttexthash="4159844" %)
1517 **Chirpstack:The downlink window will not be displayed until the network is accessed**
1518
1519 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1520
1521 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1522
1523
1524 (% _msthash="506136" _msttexthash="39286" %)
1525 **Aws:**
1526
1527 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1528
1529
1530
1531 == 6.3 How to change the uplink interval？ ==
1532
1533 [[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"]]
1534
1535
1536
1537 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1538
1539 [[image:image-20220615153355-1.png]]
1540
1541 [[image:1655802313617-381.png]]
1542
1543
1544 (((
1545 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.
1546 )))
1547
1548
1549 Input password and ATZ to activate LHT65N,As shown below:
1550
1551 [[image:image-20220615154519-3.png||height="672" width="807"]]
1552
1553
1554
1555 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1556
1557
1558 [[image:image-20220615153355-1.png]]
1559
1560
1561 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1562
1563 [[image:image-20220615170542-5.png]]
1564
1565
1566 (% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1567
1568 (% _msthash="506146" _msttexthash="52173160" %)
1569 First connect the four lines；(% style="display:none" %)
1570
1571 [[image:image-20220621170938-1.png||height="413" width="419"]](% _mstvisible="1" %)，(% style="display:none" %)
1572
1573
1574 (% _mstvisible="1" %)Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1575
1576 [[image:image-20220621170938-2.png]]
1577
1578
1579 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1580
1581 [[image:image-20220615171334-6.png]]
1582
1583
1584 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1585
1586
1587 When this interface appears, it indicates that the download has been completed.
1588
1589 [[image:image-20220620160723-8.png]]
1590
1591
1592 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1593
1594
1595
1596 = 7. Order Info =
1597
1598
1599 Part Number: (% _mstvisible="4" style="color:#4f81bd" %)** LHT65N-XX-YY**
1600
1601 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1602
1603 (% style="color:#4f81bd" %)** **(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1604
1605 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1606
1607 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1608
1609 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1610
1611 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1612
1613 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1614
1615 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1616
1617 * (% style="color:#4f81bd" %)** **(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1618
1619 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1620
1621 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1622
1623
1624
1625 = 8. Packing Info =
1626
1627
1628 **Package Includes**:
1629
1630 * LHT65N Temperature & Humidity Sensor x 1
1631 * Optional external sensor
1632
1633 **Dimension and weight**:
1634
1635 * Device Size:  10 x 10 x 3.5 cm
1636 * Device Weight: 120.5g
1637
1638
1639 = 9. Reference material =
1640
1641 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0||_msthash="504975" _msttexthash="51420512"]]
1642
1643 = 10. FCC Warning =
1644
1645 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1646
1647 (1) This device may not cause harmful interference；
1648
1649 (2) this device must accept any interference received, including interference that may cause undesired operation.