Version 294.4 by Xiaoling on 2023/04/27 18:00
Show last authors
1 (% aria-label="image-20220611143226-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)
2 (((
3 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]
4 )))
5
6 (% style="text-align:center" %)
7 [[image:image-20220617163631-2.jpeg||height="704" width="617"]]
8
9
10 **Table of Contents:**
11
12 {{toc/}}
13
14 (% aria-label="macro:toc widget" contenteditable="false" role="region" tabindex="-1" %)
15 (((
16 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]
17 )))
18
19
20
21
22
23
24
25
26
27 = 1.  Introduction =
28
29 == 1.1 ​ What is LTC2 LoRaWAN Temperature Transmitter ==
30
31 (((
32
33
34 (((
35 (((
36 The Dragino LTC2 Industrial LoRaWAN Temperature Transmitter is designed to monitor temperature for different environment. It supports to read (% style="color:#4472c4" %)**PT100 probe**(%%) and convert the value to temperature and uplink to IoT server via LoRaWAN protocol.
37 )))
38
39 (((
40 LTC2 supports (% style="color:#4472c4" %)**Datalog feature**(%%). User can retrieve the sensor value via LoRaWAN downlink command.
41 )))
42
43 (((
44 LTC2 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%) for long time measurement. The battery can run 2~~10 years depends on the network environment and working mode.
45 )))
46
47 (((
48 Each LTC2 has (% style="color:#4472c4" %)**two internal 24-bit ADC interfaces** (%%)and are calibrated on 12 set resistors to make sure the accuracy measurement on wide range.
49 )))
50
51 (((
52 LTC2 is LoRaWAN v1.0.3 compatible. Each LTC2 is pre-load with a set of unique keys for LoRaWAN registration, register these keys to local LoRaWAN server and it will auto connect after power on.
53 )))
54
55
56 [[image:image-20220617164020-3.png||height="450" width="1084"]]
57 )))
58 )))
59
60
61 == ​1.2  Features ==
62
63
64 * LoRaWAN v1.0.3 Class A
65 * max: 2 x monitor temperature channels
66 * Support 3 -wire PT-100
67 * 8500mAh Li-SOCI2 Battery
68 * Firmware upgrade via console
69 * Wall Mountable
70 * Configurable via LoRa or UART
71 * Datalog and retrieve via LoRaWAN
72 * Use pre-load PT100 probe or 3rd PT100 probe
73 * Factory calibration for different resistance range
74 * Support accuracy measure of resistance and upload
75 * Battery Monitoring and upload
76 * Operation Temperature: -40 ~~ 65 ℃
77
78 (% style="display:none" %) ** **
79
80
81
82 == 1.3 ​ Applications ==
83
84
85 * Logistics and Supply Chain Management
86 * Food management
87 * Cold chains solution
88 * Industrial Monitoring and Control
89
90
91
92 == 1.4 Hardware Change log ==
93
94
95 LTC2 v1.0: Release.
96
97
98 == 1.5  Pin Definitions and Switch ==
99
100 === (% title="Click and drag to resize" %)1.5.1  J(%%)umper JP2 ( Power ON) ===
101
102 (% class="wikigeneratedid" id="H200B200B200B200B" %)
103 (% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)​(%%)​
104
105 Put a jumper on JP2 will power on the LTC2.
106
107
108 === 1.5.2  LED ===
109
110
111 The LED will flash in below case.
112
113 (((
114 1.  Send an uplink packet
115
116
117 )))
118
119 === 1.5.3  PT100 Interfaces ===
120
121
122 (((
123 There are two independent channels to connect 2 x PT100 probes.
124 )))
125
126 (((
127 Each channel has 3-wire connection for 3-wire PT100 probes.
128 )))
129
130
131 === 1.5.4  Reset Button ===
132
133
134 Press this button will reboot the LTC2
135
136
137 === 1.6  Probe Variant ===
138
139
140 LTC2 provide default probe version. See below for the variant:
141
142
143 (% border="1" cellspacing="5" style="background-color:#f7faff; width:505px" %)
144 |=(% style="width: 78px;background-color:#D9E2F3;color:#0070C0" %)(((
145 **Model**
146 )))|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)(((
147 **Photo**
148 )))|=(% style="width: 314px;background-color:#D9E2F3;color:#0070C0" %)(((
149 **Description**
150 )))
151 |(% style="width:78px" %)(((
152 LTC2-SI
153 )))|(% style="width:117px" %)(((
154 [[image:1655458404877-785.png]]
155 )))|(% style="width:314px" %)(((
156 Standard IP68 Probe Version
157
158 * (((
159 LTC2 with 1 x Standard IP68 PT100 probe.
160 )))
161 * (((
162 Installation: Insert
163 )))
164 * (((
165 Cable Length : 2m
166 )))
167 * (((
168 PT100 Class : Class A
169 )))
170 * (((
171 Probe Dimension: 4*30mm
172 )))
173 * (((
174 Measure Range: -50 ~~ 200 °C
175 )))
176 * (((
177 Suitable Environment: General environment
178 )))
179 )))
180 |(% style="width:78px" %)(((
181 LTC2-LT
182 )))|(% style="width:117px" %)(((
183 [[image:image-20220617172838-2.png]]
184 )))|(% style="width:314px" %)(((
185 Low Temperature Version
186
187 * (((
188 LTC2 with 1 x Low Temperature PT100 probe.
189 )))
190 * (((
191 Installation: Insert
192 )))
193 * (((
194 Cable Length : 2m
195 )))
196 * (((
197 PT100 Class : Class A
198 )))
199 * (((
200 Probe Dimension: 4*30mm
201 )))
202 * (((
203 Measure Range: -196 ~~ 150 °C
204 )))
205 * (((
206 Suitable Environment: Low temperature measurement, such as COVID vaccine transport
207 )))
208 )))
209 |(% style="width:78px" %)(((
210 LTC2-FS
211 )))|(% style="width:117px" %)(((
212 [[image:image-20220617172838-3.png]]
213 )))|(% style="width:314px" %)(((
214 Food Safety Version
215
216 * (((
217 LTC2 with 1 x Food Safety PT100 probe.
218 )))
219 * (((
220 Installation: Insert
221 )))
222 * (((
223 Cable Length : 2m
224 )))
225 * (((
226 PT100 Class : Class A
227 )))
228 * (((
229 Probe Dimension: 4*150mm
230 )))
231 * (((
232 Measure Range: -50 ~~ 200 °C
233 )))
234 * (((
235 Suitable Environment: Food temperature measurement
236 )))
237 )))
238 |(% style="width:78px" %)LTC-FSA|(% style="width:117px" %)[[image:image-20221222182717-1.jpeg]]|(% style="width:314px" %)(((
239 Food Safety Version
240
241 * (((
242 LTC2 with 1 x Food Safety PT100 probe.
243 )))
244 * (((
245 Installation: Insert
246 )))
247 * (((
248 Cable Length : 2m
249 )))
250 * (((
251 PT100 Class : Class A
252 )))
253 * (((
254 Probe Dimension: 4*150mm
255 )))
256 * (((
257 Measure Range: -50 ~~ 200 °C
258 )))
259 * (((
260 Suitable Environment: Food temperature measurement
261 )))
262 )))
263 |(% style="width:78px" %)(((
264 LTC2-FT
265 )))|(% style="width:117px" %)(((
266 (% style="text-align:center" %)
267 [[image:image-20220617172838-4.png]]
268 )))|(% style="width:314px" %)(((
269 Flat Type Version
270
271 * LTC2 with 1 x Flat Type PT100 probe.
272 * Installation: Attached
273 * Cable Length : 2m
274 * PT100 Class : Class A
275 * Probe Dimension: 8*25mm
276 * Measure Range: -50 ~~ 200 °C
277 * Suitable Environment: Attached to the measure point.
278 )))
279 |(% style="width:78px" %)LTC2-HT|(% style="width:117px" %)[[image:image-20220617172838-5.png]]|(% style="width:314px" %)(((
280 High Temperature Version
281
282 * LTC2 with 1 x high temperature PT100 probe.
283 * Installation: Insert
284 * Cable Length : 3m
285 * PT100 Class : Class A
286 * Probe Dimension: 4*30mm
287 * Measure Range: -70 ~~ 550 °C
288
289 Suitable Environment: High Temperature
290 )))
291 |(% style="width:78px" %)LTC2-NA|(% style="width:117px" %)[[image:image-20220617172838-6.png]]|(% style="width:314px" %)(((
292 No Probe version:
293
294 * User can connect to their own PT100 Probe
295 * Grand Hole: M12
296 * Suitable Environment:
297
298 Connect to customized probe
299 )))
300
301
302 = 2.  How to use LTC2? =
303
304 == 2.1  Connect to PT100 sensors ==
305
306
307 LTC2 has different probe option provided for ordering, if user has LTC2 with probe, just skip this step. If user want to connect to a 3^^rd^^ party PT100 probe, please see [[CONNECT A 3(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)^^rd^^ PARTY PT100 probe>>||anchor="H6.A0FAQ"]](%%).
308
309
310 === 2.2  How it works? ===
311
312
313 (((
314 (((
315 The LTC2 is working in LoRaWAN OTAA Class A mode. Each LTC2 is shipped with a worldwide unique set of OTAA and ABP keys. User needs to input the OTAA or ABP keys in the LoRaWAN network server so to register. LTC2 will join the LoRaWAN network and start to transmit data. The default period for each uplink is **20 minutes**.
316 )))
317
318 (((
319 On each uplink, LTC2 will check its two ADC Interfaces and get the temperature from the sensor and send out to server.
320 )))
321 )))
322
323
324 == 2.3  ​Quick guide to connect to LoRaWAN server (OTAA) ==
325
326
327 (((
328 Here is an example for how to join the [[TTN v3 LoRaWAN >>url:https://eu1.cloud.thethings.network/]]Server. Below is the network structure, in this demo we use [[DLOS8>>url:https://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway.
329
330 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:1655687566853-908.png]](% title="Click and drag to resize" %)​[[image:1655687927369-781.png]]
331 )))
332
333 (% title="Click and drag to resize" %)​(%%)The DLOS8 is already set to connect to [[TTN >>url:https://eu1.cloud.thethings.network/]]. Rest we need to is register the LTC2 to TTN v3:(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)​(%%)​
334
335 (((
336
337
338 === 2.3.1 Step 1: Create a device in TTN with the OTAA keys from LTC2 ===
339
340
341
342 Below is TTN screen shot:
343
344 * Create Application first.
345 * Manually Add a LoRaWAN End Device device. Choose **OTAA** and **MAC v1.0.3**
346
347 [[image:1655690861020-685.png]]
348
349
350 [[image:1655690877643-259.png]]
351
352
353 Input the OTAA keys for LTC2.
354
355 Each LTC2 is shipped with a sticker with the default device EUI as below:
356
357 [[image:image-20230426083905-2.png]]
358
359
360 * **Input these keys to device portal.**
361
362 [[image:image-20220620100853-1.png]]
363
364
365
366 * **Choose the Frequency band for this end node.**
367
368 [[image:image-20220620100853-2.png]]
369
370
371 * **Input APP Key in this page as well. **
372
373 [[image:image-20220620100853-3.png]]
374
375
376 Add payload formatter So TTNv3 knows how to parse the LTC2 upload value.
377
378
379 The payload for TTN can be found at below link:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
380
381
382 [[image:image-20220620100853-4.png]]
383
384
385 === 2.3.2  Step 2: Power on LTC2 ===
386
387
388 LTC2 is power off when ship from factory.
389
390 Put a Jumper on JP2 to power on the device.
391
392
393 [[image:1655691076464-442.png]]
394
395
396
397 (((
398 After power on, LTC2 will auto join to TTN network via the LoRaWAN coverage by DLOS8. After join success, LTC2 will start to update message to IoT server.
399 )))
400
401 (((
402 Below is an example uplink message which shows the LTC2 is sending Join Request to TTNv3.
403 )))
404
405
406 [[image:1655691086647-147.png]]
407
408
409 After join successful, LTC2 will send uplink message with the sensor value.
410
411 [[image:1655691100066-163.png]]
412
413 Above value shows Channel1 detect 25.94 degree. There is no PT100 connected on Channel 2, so it shows -327.67.
414 )))
415
416
417 == 2.4  ​Uplink Payload ==
418
419
420 Below is the uplink payload which shows.
421
422 (% border="1" cellspacing="10" style="background-color:#f2f2f2; width:510px" %)
423 |=(% style="width: 62.5px;background-color:#D9E2F3" %)(((
424 **Size(bytes)**
425 )))|=(% style="width: 62.5px;background-color:#D9E2F3" %)**2**|=(% style="width: 62.5px;background-color:#D9E2F3" %)**1**|=(% style="width: 62.5px;background-color:#D9E2F3" %)2|=(% style="width: 62.5px;background-color:#D9E2F3" %)2|=(% style="width: 62.5px;background-color:#D9E2F3" %)**4**
426 |(% style="width:62.5px" %)**Value**|(((
427 [[BAT>>||anchor="HBAT"]]
428 )))|(((
429 [[Status & EXT>>||anchor="HStatus26EXT"]]
430 )))|(((
431 [[Channel 1 data>>||anchor="HChannel1dataandChannel2data"]]
432 )))|(((
433 [[Channel 2 data>>||anchor="HChannel1dataandChannel2data"]]
434 )))|(((
435 [[Unix TimeStamp>>||anchor="HUnixTimeStamp"]]
436 )))
437
438 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
439
440
441 (((
442 === (% style="color:blue" %)**BAT**(%%) ===
443
444
445 (% class="wikigeneratedid" %)
446 Ex1: 0x0E3C ⇒ 3644 (mV) = 3.644 V
447
448 (% class="wikigeneratedid" %)
449
450 )))
451
452 (((
453 === (% style="color:blue" %)**Status & EXT**(%%) ===
454
455
456 )))
457
458 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
459 |=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)**Bits**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**7**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**[3:0]**
460 |=(% style="width: 96px;" %)Status&Ext|(% style="width:124px" %)Not Defined|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
461
462 * (% style="color:#037691" %)**Poll Message Flag**(%%):  1: This message is a poll message reply, 0: means this is a normal uplink.
463 * (% style="color:#037691" %)**Sync time OK**(%%):  1: Set time ok，0: N/A. After time SYNC request is send, device will set this bit to 0 until got the time stamp from application server.
464 * (% style="color:#037691" %)**Unix Time Request**(%%):  1: Request server downlink Unix time, 0 : N/A. In this mode, LTC2 will set this bit to 1 every 10 day to request a time SYNC. (AT+SYNCMOD to set this)
465 * (% style="color:#037691" %)**EXT**(%%):  The decode method for Channel 1 data and Channel 2 data
466 ** 0b(0001): Upload PT100 temperature, with 2 decimals, range:  **-327.67 ~~ 327.67 ℃**
467 ** 0b(0010): Upload PT100 temperature, with 1 decimals, range: ** -3276.7 ~~ 3276.7 ℃**
468 ** 0b(0011): Upload Resistance instead of Temperature, range:  **-327.67~~ 327.67 ohm**
469
470 (((
471 (% class="wikigeneratedid" %)
472
473
474
475 === (% style="color:blue" %)**Channel1 data and Channel 2 data**(%%) ===
476
477
478 )))
479
480 (((
481 (% class="wikigeneratedid" %)
482 [[image:image-20230427154124-1.png]]
483
484
485 === (% style="color:blue" %)**Unix TimeStamp**(%%) ===
486
487
488 )))
489
490 Refer to Datalog feature.
491
492 (% style="color:#037691" %)**Example Uplink Payload**:
493
494
495 **Uplink payload example 1:**  0CE9011422EC2D6073E83B
496
497 * Bat voltage:0x0CE9 =3305mV
498 * Ext=0x01
499 * Channel1 temp=0x1422/100=51.54 ℃
500 * Channel2 temp=(0xEC2D-65536)/100=-50.75 ℃
501 * System timestamp=0x6073E83B= 1618208827(UTC)
502
503 If payload is: EC2DH :  (EC2D & 8000 == 1) , temp = (EC2DH - 65536)/100 = -50.75 ℃
504
505 （EC2D & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
506
507
508 **Uplink payload example 2: ** 0CED020203FE056073E697
509
510 * Bat voltage:0x0CED =3309mV
511 * Ext=0x02
512 * Channel1 temp=0x0203/10=515.4 ℃
513 * Channel2 temp=(0xFE05-65536)/10=-507.5 ℃
514 * System timestamp=0x6073E697=1618208407(UTC)
515
516 If payload is: FE05H :  (FE05 & 8000 == 1) , temp = (FE05H - 65536)/100 = 507.5 ℃
517
518 （EC2D & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
519
520
521 **Uplink payload example 3 :**  0CE9032EDE1F406073E967
522
523 * Bat voltage:0x0CE9 =3305mV
524 * Ext=0x03
525 * Channel1 res=0x2EDE/100=119.98 ohm
526 * Channel2 res=0x1F40/100=80.00 ohm
527 * System timestamp=0x6073E967= 1618209127(UTC)
528
529 (% title="Click and drag to resize" %)​​(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)​(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)​(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)​(%%)​
530
531
532 == 2.5  Datalog Feature ==
533
534
535 LTC2 will auto get the time from LoRaWAN server during Join, and each uplink will then include a timestamp. When user want to retrieve sensor value, user can send a poll command from the IoT platform to ask sensor to send value in the required time slot.
536
537
538 === 2.5.1  Unix TimeStamp ===
539
540
541 LTC2 uses Unix TimeStamp format based on
542
543 [[image:1655694312268-590.png]]
544
545
546 Users can get this time from the link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
547
548 Below is the converter example
549
550 [[image:1655694332878-202.png]]
551
552
553 (((
554 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set current time 2021 – Jan ~-~- 29 Friday 03:03:25
555 )))
556
557
558 === 2.5.2  Set Device Time ===
559
560
561 (((
562 (((
563 There are two ways to set the device's time:
564 )))
565 )))
566
567 (((
568 (((
569 (% style="color:#4f81bd" %)**1. Through LoRaWAN MAC Command (Default settings)**
570 )))
571 )))
572
573 (((
574 (((
575 Users need to set SYNCMOD=1 to enable sync time via the MAC command.
576 )))
577 )))
578
579 (((
580 Once LTC2 Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and server will reply with (DeviceTimeAns) to send the current time to LTC2. If LTC2 fails to get the time from server, LTC2 will use the internal time and wait for next time request (AT+SYNCTDC to set time request period, default is 10 days).
581
582
583 )))
584
585 (((
586 (((
587 (% style="color:red" %)**Note**(%%): (% style="color:#4f81bd" %)LoRaWAN Server needs to support LoRaWAN v1.0.3(MAC v1.0.3) (%%)or higher to support this MAC command feature, Chirpstack,TTN v3 and loriot support but TTN 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 v2 if SYNCMOD=1.
588
589
590 )))
591
592 (((
593 (% style="color:#4f81bd" %)**2. Manually Set Time**
594 )))
595
596 (((
597 Users need to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
598 )))
599 )))
600
601
602 === 2.5.3  Poll sensor value ===
603
604
605 Users can poll sensor values based on timestamps. Below is the downlink command.
606
607 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:431px" %)
608 |=(% colspan="4" style="width: 428px;background-color:#D9E2F3;color:#0070C0" %)**Downlink Command to poll Open/Close status (0x31)**
609 |(% style="width:60px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:122px" %)**4bytes**|(% style="width:116px" %)**1byte**
610 |(% style="width:60px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:122px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
611
612 (((
613
614 )))
615
616 (((
617 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.
618
619 For example, downlink command[[image:image-20220620111056-7.png]]
620 )))
621
622 (((
623 Is to check 2021/5/16 01:00:00 to 2021/5/16 02:00:00's data
624
625 Uplink Internal =10s，means LTC2 will send one packet every 10s. range 5~~255s.
626 )))
627
628
629 === 2.5.4  Datalog Uplink payload ===
630
631
632 When server senser a datalog polling to LTC2, LTC2 will reply with one or more uplink messages as reply. Each uplink message includes multiply data entries value. Each entry has the same payload format as[[ normal uplink payload>>||anchor="H2.4A0200BUplinkPayload"]].
633
634
635 (% style="color:red" %)**Note:**
636
637 * Poll Message Flag is set to 1.
638 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
639
640 For example, in US915 band, the max payload for different DR is:
641
642 1. **DR0: **max is 11 bytes so one entry of data
643 1. **DR1:** max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
644 1. **DR2:** total payload includes 11 entries of data
645 1. **DR3:** total payload includes 22 entries of data.
646
647 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
648
649
650 **Example:**
651
652 If LTC2 has below data inside Flash:
653
654 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:504.818px" %)
655 |(% style="background-color:#d9e2f3; color:#0070c0; width:88px" %)**Flash Add**|(% style="background-color:#d9e2f3; color:#0070c0; width:151px" %)**Unix Time**|(% style="background-color:#d9e2f3; color:#0070c0; width:38px" %)**Ext**|(% style="background-color:#d9e2f3; color:#0070c0; width:107px" %)**BAT voltage**|(% style="background-color:#d9e2f3; color:#0070c0; width:123px" %)**Value**
656 |(% style="width:88px" %)8021630|(% style="width:151px" %)systime= 2021/5/16 01:17:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %)Temp1=28.89 Temp2=-327.67
657 |(% style="width:88px" %)8021640|(% style="width:151px" %)systime= 2021/5/16 01:37:44|(% style="width:38px" %)1|(% style="width:107px" %)3681|(% style="width:123px" %)Temp1=28.79 Temp2=-327.67
658 |(% style="width:88px" %)8021650|(% style="width:151px" %)systime= 2021/5/16 01:57:44|(% style="width:38px" %)1|(% style="width:107px" %)3681|(% style="width:123px" %)Temp1=28.67 Temp2=-327.67
659 |(% style="width:88px" %)8021660|(% style="width:151px" %)systime= 2021/5/16 02:17:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %)Temp1=28.60 Temp2=-327.67
660 |(% style="width:88px" %)8021670|(% style="width:151px" %)systime= 2021/5/16 02:37:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %)Temp1=28.56 Temp2=-327.67
661 |(% style="width:88px" %)8021680|(% style="width:151px" %)systime= 2021/5/16 02:57:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %)Temp1=28.52 Temp2=-327.67
662 |(% style="width:88px" %)8021690|(% style="width:151px" %)systime= 2021/5/16 03:17:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %)Temp1=28.51 Temp2=-327.67
663 |(% style="width:88px" %)80216A0|(% style="width:151px" %)systime= 2021/5/16 03:37:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %)Temp1=28.50 Temp2=-327.67
664 |(% style="width:88px" %)80216B0|(% style="width:151px" %)systime= 2021/5/16 03:57:44|(% style="width:38px" %)1|(% style="width:107px" %)3684|(% style="width:123px" %) Temp1=28.46 Temp2=-327.67
665
666 If user send below downlink command: **3160A06E9060A098C00A**
667
668 Where : Start time: 60A06E90 = time 21/5/16 01:00:00
669
670 Stop time: 60A098C0 = time 21/5/16 04:00:00
671
672
673 LTC2 will uplink this payload.
674
675
676 [[image:image-20220620111850-8.png]]
677
678
679 (% style="color:red" %)**0E64410B49800160A072B8**(%%)0E61410B3F800160A077680E61410B33800160A07C180E64410B2C800160A080C80E64410B28800160A085780E64410B24800160A08A280E64410B23800160A08ED80E64410B22800160A09388(% style="color:red" %)**0E64410B1E800160A09838**
680
681
682 Where the first 11 bytes is for the first entry:
683
684 (% style="color:red" %)**0E64410B49800160A072B8**
685
686 Bat voltage: 0x0E64 =3684mV
687
688
689 poll message flag & Ext=0x41,means reply data,Ext=1
690
691 Channel1 temp=0x0B49/100=28.89℃
692
693 Channel2 temp=0x8001/100=-327.67℃
694
695 System timestamp=0x60A072B8= 1621127864(UTC)
696
697
698 == 2.6  ​Alarm Mode ==
699
700
701 (((
702 LTC2 can monito the temperature in every CTTEMP time, when the temperature exceed the limit , it will uplink the sensor value immediately.
703
704 Detail commands see:
705
706 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Enable Alarm Mode**>>||anchor="H3.9EnableAlarmmode"]]
707 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Config Alarm Sampling Time**>>||anchor="H3.10Alarmchecktime"]]
708 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Set Alarm Threshold**>>||anchor="H3.11SetAlarmThreshold"]]
709
710
711 )))
712
713
714 = 3.  Configure LTC2 via AT Command or LoRaWAN Downlink =
715
716
717 (((
718 (((
719 Use can configure LTC2 via AT Command or LoRaWAN Downlink.
720 )))
721 )))
722
723 * (((
724 (((
725 AT Command Connection: See [[FAQ>>||anchor="H6.A0FAQ"]].
726 )))
727 )))
728 * (((
729 (((
730 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
731 )))
732 )))
733
734 (((
735 (((
736
737 )))
738
739 (((
740 There are two kinds of commands to configure LTC2, they are:
741 )))
742 )))
743
744 * (((
745 (((
746 (% style="color:#4f81bd" %)** General Commands**.
747 )))
748 )))
749
750 (((
751 (((
752 These commands are to configure:
753 )))
754 )))
755
756 * (((
757 (((
758 General system settings like: uplink interval.
759 )))
760 )))
761 * (((
762 (((
763 LoRaWAN protocol & radio related command.
764 )))
765 )))
766
767 (((
768 (((
769 They are same for all Dragino Device which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
770 )))
771 )))
772
773 (((
774 (((
775
776 )))
777 )))
778
779 * (((
780 (((
781 (% style="color:#4f81bd" %)** Commands special design for LTC2**
782 )))
783 )))
784
785 (((
786 (((
787 These commands only valid for LTC2, as below:(% title="Click and drag to resize" %)​
788 )))
789 )))
790
791 (% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)​
792
793
794 == 3.1  Set Transmit Interval Time ==
795
796
797 Feature: Change LoRaWAN End Node Transmit Interval.
798
799 (% style="color:#037691" %)**AT Command: AT+TDC**
800
801 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:501px" %)
802 |(% style="background-color:#d9e2f3; color:#0070c0; width:155px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:166px" %)**Function**|(% style="background-color:#d9e2f3; color:#0070c0; width:180px" %)**Response**
803 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)(((
804 30000
805 OK
806 the interval is 30000ms = 30s
807 )))
808 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)(((
809 OK
810 Set transmit interval to 60000ms = 60 seconds
811 )))
812
813 (((
814 (% style="color:#037691" %)**Downlink Command: 0x01**
815 )))
816
817 (((
818 (((
819 Format: Command Code (0x01) followed by 3 bytes time value.
820
821 (((
822 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
823 )))
824
825 * Example 1: Downlink Payload: 0100001E  ~/~/  Set Transmit Interval (TDC) = 30 seconds
826 * Example 2: Downlink Payload: 0100003C  ~/~/  Set Transmit Interval (TDC) = 60 seconds
827 )))
828 )))
829
830
831
832 == 3.2  Enable PT100 channels ==
833
834
835 Feature: Enable PT100 channels. Default only Enable Channel 1
836
837 (% style="color:#037691" %)**AT Command: AT+ENPTCHNUM**
838
839 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:494px" %)
840 |=(% style="width: 164px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 254px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 74px;background-color:#D9E2F3;color:#0070C0" %)**Response**
841 |(% style="width:164px" %)AT+ENPTCHNUM=?|(% style="width:254px" %)Get current ENPTCHNUM settings|(% colspan="1" rowspan="3" style="width:74px" %)(((
842 1
843
844 OK
845 )))
846 |(% style="width:164px" %)AT+ ENPTCHNUM =1|(% colspan="1" style="width:254px" %)Enable channel 1
847 |(% style="width:164px" %)AT+ ENPTCHNUM =2|(% colspan="1" style="width:254px" %)Enable channel 1 and 2
848
849 (% style="color:#037691" %)**Downlink Command: 0xA1**
850
851 Total bytes: 2 bytes
852
853 Example:
854
855 * 0xA101: same as AT+ENPTCHNUM =1
856 * 0xA102: same as AT+ENPTCHNUM =2
857
858
859
860 == 3.3  Set External Sensor Mode ==
861
862
863 (((
864 Feature: Change External Sensor Mode.
865 )))
866
867 (((
868 (% style="color:#037691" %)**Downlink Command: AT+EXT**
869 )))
870
871 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:431px" %)
872 |=(% style="width: 158px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 184px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 89px;background-color:#D9E2F3;color:#0070C0" %)**Response**
873 |(% style="width:155px" %)AT+EXT=?|(% style="width:180px" %)Get current EXT settings|(% colspan="1" rowspan="4" style="width:86px" %)(((
874 1
875 OK
876 )))
877 |(% style="width:155px" %)AT+EXT=1|(% colspan="1" style="width:180px" %)Set EXT to 0b(0001)
878 |(% style="width:155px" %)AT+EXT=2|(% colspan="1" style="width:180px" %)Set EXT to 0b(0010)
879 |(% style="width:155px" %)AT+EXT=3|(% colspan="1" style="width:180px" %)Set EXT to 0b(0011)
880
881 (% style="color:#037691" %)**Downlink Command: 0xA2**
882
883 Total bytes: 2 bytes
884
885 Example:
886
887 * 0xA201: same as AT+EXT=1
888
889
890
891 == 3.4 Quit AT Command ==
892
893
894 Feature: Quit AT Command mode, so user need to input password again before use AT Commands.
895
896 (% style="color:#037691" %)**AT Command: AT+DISAT**
897
898 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:446px" %)
899 |=(% style="width: 163px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 193px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 88px;background-color:#D9E2F3;color:#0070C0" %)**Response**
900 |(% style="width:161px" %)AT+DISAT|(% style="width:193px" %)Quit AT Commands mode|(% style="width:87px" %)OK
901
902 (% style="color:#037691" %)**Downlink Command:**
903
904 No downlink command for this feature.
905
906
907 == 3.5 Set system time ==
908
909
910 Feature: Set system time, unix format. [[See here for formmat detail.>>||anchor="H2.5.1A0UnixTimeStamp"]]
911
912 (% style="color:#037691" %)**AT Command:**
913
914 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:506px" %)
915 |=(% style="width: 219px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 287px;background-color:#D9E2F3;color:#0070C0" %)**Function**
916 |(% style="width:218px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
917 OK
918 Set System time to 2021-01-20 00:59:12
919 )))
920
921 (% style="color:#037691" %)**Downlink Command:**
922
923 0x306007806000  ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
924
925
926 == 3.6 Set Time Sync Mode ==
927
928
929 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
930
931 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.
932
933
934 (% style="color:#037691" %)**AT Command:**
935
936 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:473px" %)
937 |=(% style="width: 159px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 314px;background-color:#D9E2F3;color:#0070C0" %)**Function**
938 |(% style="width:157px" %)AT+SYNCMOD=1|(% style="width:313px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
939
940 (% style="color:#037691" %)**Downlink Command:**
941
942 0x28 01  ~/~/ Same As AT+SYNCMOD=1
943
944 0x28 00  ~/~/ Same As AT+SYNCMOD=0
945
946
947 == 3.7 Set Time Sync Interval ==
948
949
950 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
951
952 (% style="color:#037691" %)**AT Command:**
953
954 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:469px" %)
955 |=(% style="width: 163px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 306px;background-color:#D9E2F3;color:#0070C0" %)**Function**
956 |AT+SYNCTDC=0x0A|(% style="width:306px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
957
958 (% style="color:#037691" %)**Downlink Command:**
959
960 0x29 0A  ~/~/ Same as AT+SYNCTDC=0x0A
961
962
963 == 3.8 Retrieve data ==
964
965
966 Feature: Retrieval data for specify time slot.
967
968 (% style="color:#037691" %)**AT Command**(%%)**:**
969
970 No AT Command, only valid for downlink command.
971
972
973 (% style="color:#037691" %)**Downlink Command:**
974
975 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
976
977
978 == 3.9 Enable Alarm mode ==
979
980
981 Feature: Enable Alarm Mode.
982
983 (% style="color:#037691" %)**AT Command: AT_WMOD**
984
985 Total bytes: 2
986
987 Example:
988
989 0xA500: AT+WMOD=0(default)
990
991 0xA501: AT+WMOD=1(alarm mode)
992
993
994 (% style="color:#037691" %)**Downlink Command:**
995
996 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
997
998
999 == 3.10 Alarm check time ==
1000
1001
1002 Feature: The time interval to check sensor value for Alarm.
1003
1004 (% style="color:#037691" %)**AT Command: AT+CITEMP**
1005
1006 Total bytes: 3
1007
1008 Example:
1009
1010 0xA60001: AT+CITEMP=1(default)
1011
1012 Set collection interval in 1min,only in alarm mode
1013
1014
1015 (% style="color:#037691" %)**Downlink Command:**
1016
1017 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
1018
1019
1020 == 3.11 Set Alarm Threshold ==
1021
1022
1023 Feature: Set Alarm Threshold.
1024
1025 (% style="color:#037691" %)**AT Command: AT+ARTEMP**
1026
1027 Total bytes: 9  Unit: ℃
1028
1029 Example:
1030
1031 A7FF380320FF380320
1032
1033 AT+ARTEMP=-200,800,-200,800
1034
1035
1036 A7000A0064000A0065
1037
1038 AT+ARTEMP=10,100,10,101
1039
1040 Channel 1 operating temp:10~~100
1041
1042 Channel 2 operating temp:10~~101
1043
1044
1045 (% style="color:#037691" %)**Downlink Command:**
1046
1047 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
1048
1049
1050 == 3.12 Set Calibrate Value ==
1051
1052
1053 Feature: Set Calibrate value for PT100 cable.  Detail of use of this command please see [[connect to a customized PT100 Probe>>||anchor="H6.2A0HowtoconnectacustomizedPT100cable3F"]].
1054
1055 (% style="color:#037691" %)**AT Command: AT+RCABLE**
1056
1057 Total bytes: 5
1058
1059 Example:
1060
1061 AT+RCABLE=296,300
1062
1063 Channel 1 rcable=0x0128/1000=0.296R
1064
1065 Channel 2 rcable=0x012C/1000=0.300R
1066
1067
1068 (% style="color:#037691" %)**Downlink Command:**
1069
1070 0xA80128012C  ~-~->  Same as AT+RCABLE=296,300
1071
1072
1073 == 3.13 Poll Calibrate Value ==
1074
1075
1076 Feature: Poll Calibrate value. LTC2 will reply with this command send an uplink to server.
1077
1078 (% style="color:#037691" %)**AT Command: No AT Command.**
1079
1080
1081 (% style="color:#037691" %)**Downlink Command:**
1082
1083 Example: A901
1084
1085 End nodes will send racable config to server
1086
1087 Like uplink payload: 010128012C
1088
1089
1090 == 3.14 Print data entries base on page ==
1091
1092
1093 Feature: Print the sector data from start page to stop page (max is 400 pages).
1094
1095 (% style="color:#037691" %)**AT Command: AT+PDTA**
1096
1097 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:520px" %)
1098 |(% style="background-color:#d9e2f3; color:#0070c0; width:157px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:363px" %)**Response**
1099 |(% style="width:156px" %)(((
1100 AT+PDTA=259,260
1101
1102 Print page 259 to 260
1103 )))|(% style="width:362px" %)(((
1104 Stop Tx events when read sensor data
1105
1106 8021600 systime= 2021/5/16 00:17:44 1 3684 Temp1=28.71 Temp2=-327.67
1107
1108 8021610 systime= 2021/5/16 00:37:44 1 3685 Temp1=28.78 Temp2=-327.67
1109
1110 8021620 systime= 2021/5/16 00:57:44 1 3684 Temp1=28.83 Temp2=-327.67
1111
1112 8021630 systime= 2021/5/16 01:17:44 1 3684 Temp1=28.89 Temp2=-327.67
1113
1114 8021640 systime= 2021/5/16 01:37:44 1 3681 Temp1=28.79 Temp2=-327.67
1115
1116 8021650 systime= 2021/5/16 01:57:44 1 3681 Temp1=28.67 Temp2=-327.67
1117
1118 8021660 systime= 2021/5/16 02:17:44 1 3684 Temp1=28.60 Temp2=-327.67
1119
1120 8021670 systime= 2021/5/16 02:37:44 1 3684 Temp1=28.56 Temp2=-327.67
1121
1122 8021680 systime= 2021/5/16 02:57:44 1 3684 Temp1=28.52 Temp2=-327.67
1123
1124 8021690 systime= 2021/5/16 03:17:44 1 3684 Temp1=28.51 Temp2=-327.67
1125
1126 80216A0 systime= 2021/5/16 03:37:44 1 3684 Temp1=28.50 Temp2=-327.67
1127
1128 80216B0 systime= 2021/5/16 03:57:44 1 3684 Temp1=28.46 Temp2=-327.67
1129
1130 80216C0 systime= 2021/5/16 04:17:44 1 3684 Temp1=28.40 Temp2=-327.67
1131
1132 80216D0 systime= 2021/5/16 04:37:44 1 3683 Temp1=28.37 Temp2=-327.67
1133
1134 80216E0 systime= 2021/5/16 04:57:44 1 3684 Temp1=28.36 Temp2=-327.67
1135
1136 80216F0 systime= 2021/5/16 05:17:44 1 3685 Temp1=28.32 Temp2=-327.67
1137
1138 Start Tx events
1139
1140 OK
1141 )))
1142
1143 (% style="color:#037691" %)**Downlink Command:**
1144
1145 No downlink commands for feature
1146
1147
1148 == 3.15 Print last few data entries ==
1149
1150
1151 Feature: Print the last few data entries
1152
1153 (% style="color:#037691" %)**AT Command: AT+PLDTA**
1154
1155 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:434.818px" %)
1156 |(% style="background-color:#d9e2f3; color:#0070c0; width:156px" %)**Command Example**|(% style="background-color:#d9e2f3; color:#0070c0; width:278px" %)**Response**
1157 |(((
1158 AT+PLDTA=5
1159
1160 Print last 5 entries
1161 )))|(% style="width:278px" %)(((
1162 Stop Tx events when read sensor data
1163
1164 1 systime= 2021/5/17 03:12:37 1 3681 Temp1=26.01 Temp2=-327.67
1165
1166 2 systime= 2021/5/17 03:17:37 1 3682 Temp1=26.02 Temp2=-327.67
1167
1168 3 systime= 2021/5/17 03:22:37 1 3687 Temp1=25.94 Temp2=-327.67
1169
1170 4 systime= 2021/5/17 03:27:37 1 3684 Temp1=25.95 Temp2=-327.67
1171
1172 5 systime= 2021/5/17 03:32:37 1 3684 Temp1=26.20 Temp2=-327.67
1173
1174 Start Tx events
1175
1176 OK
1177 )))
1178
1179 (% style="color:#037691" %)**Downlink Command:**
1180
1181 No downlink commands for feature
1182
1183
1184 == 3.16 Clear Flash Record ==
1185
1186
1187 Feature: Clear flash storage for data log feature.
1188
1189 (% style="color:#037691" %)**AT Command: AT+CLRDTA**
1190
1191 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:511px" %)
1192 |=(% style="width: 157px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 136px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 213px;background-color:#D9E2F3;color:#0070C0" %)**Response**
1193 |(% style="width:157px" %)AT+CLRDTA|(% style="width:136px" %)Clear date record|(% style="width:213px" %)(((
1194 Clear all stored sensor data…
1195 OK
1196 )))
1197
1198 (% style="color:#037691" %)**Downlink Command: 0xA3**
1199
1200 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1201
1202
1203
1204 = 4.  Battery & Power Consumption =
1205
1206
1207 LTC2 uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
1208
1209 [[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
1210
1211
1212 = 5.  Firmware Change Log and Upload Firmware =
1213
1214 = (% style="display:none" %) (%%) =
1215
1216 (((
1217 User can use ST-Link v2 to upgrade firmware into LTC2 for bug fix or new features. The hardware connection for upgrade firmware is as below:
1218 )))
1219
1220 (((
1221
1222 )))
1223
1224 (((
1225 **Connection:**
1226 )))
1227
1228 * (((
1229 (% style="background-color:yellow" %)**ST-LINK v2 GND  <~-~->  LTC2 GND**
1230 )))
1231 * (((
1232 (% style="background-color:yellow" %)**ST-LINK v2 RESET  <~-~->  LTC2 NRST**
1233 )))
1234 * (((
1235 (% style="background-color:yellow" %)**ST-LINK v2 SWCLK  <~-~->  LTC2 SWCLK**
1236 )))
1237 * (((
1238 (% style="background-color:yellow" %)**ST-LINK v2 SWDIO  <~-~->  LTC2 SWDIO**
1239 )))
1240 * (((
1241 (% style="background-color:yellow" %)**LTC2 power must be on.  **
1242 )))
1243
1244 (((
1245
1246
1247 **Firmware Location and Change Log:  **[[https:~~/~~/www.dropbox.com/sh/8ghh32xavvsr98l/AADg-NbTnq80Re4Bcj7uekJFa?dl=0>>https://www.dropbox.com/sh/8ghh32xavvsr98l/AADg-NbTnq80Re4Bcj7uekJFa?dl=0]]
1248
1249
1250 )))
1251
1252 = 6.  FAQ =
1253
1254 == 6.1  How to use AT Command to configure LTC2 ==
1255
1256
1257 LTC2 supports AT Command set. User can use a USB to TTL adapter plus the Program Cable to connect to LTC2 for using AT command, as below.
1258
1259
1260 **Connection:**
1261
1262 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->  LTC2 GND**
1263
1264 * (% style="background-color:yellow" %)**USB to TTL RXD  <~-~->  LTC2 TXD**
1265
1266 * (% style="background-color:yellow" %)**USB to TTL TXD  <~-~->  LTC2 RXD**
1267
1268 (((
1269 In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url: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 LTC2. 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.
1270 )))
1271
1272
1273 (((
1274 Input password and ATZ to activate LTC2,As shown below:
1275 )))
1276
1277 [[image:image-20220620151601-13.png||height="454" width="1204"]]
1278
1279
1280 == 6.2  How to connect a customized PT100 cable? ==
1281
1282
1283 (((
1284 The LTC2 has two channels means it can connect 2 x PT100 cables. Besides use the PT100 cables provided by Dragino, User can connect their PT100 probes. When connect to a user PT100 probe, we recommend that user do a calibration to eliminate the effect from the cables so to get the best accuracy. Below is the step for calibrate on a (% style="color:blue" %)**three wire PT100** (%%)probes. There is no step for 2 wire probe calibration at the moment. 
1285 )))
1286
1287
1288 (((
1289 (% style="color:blue" %)**Step 1**(%%)**: **You need a multimeter can measure the accuracy of 0.001 ohm. We use Agilent 34401A digit multimeter. And will do test to make sure the multimeter accuracy before the measurement. Check the shortcut resistance of the multimeter.
1290 )))
1291
1292 [[image:image-20220620152115-14.jpeg||height="548" width="763"]]
1293
1294 We know that the Multimeter has a shortcut resistance 0.002 ohm.
1295
1296
1297 (% style="color:blue" %)**Step 2**(%%): Measure the resistance between the two shorted wires of PT100 Probe.
1298
1299
1300 [[image:image-20220620152115-15.jpeg||height="791" width="704"]]
1301
1302 As example, in this step, we check the shorted wire (both red) with 0.594 ohm, So we know that each wire of PT100 has (0.594-0.002)/2=0.296R (Where 0.002 is the value we got from step 1) .
1303
1304
1305 (% style="color:blue" %)**Step 3**(%%): Run Calibrate Command.
1306
1307 Run this command to both channels to use 0.296R calibrate resistance.
1308
1309 (% style="color:red" %)**AT+RCABLE=296,0** (%%) ~-~->  Calibrate Channel 1 with 0.296R
1310
1311
1312 Or use LoRaWAN downlink command (0xA8 Code) to set: 0xA801280000
1313
1314 User can use 0xA9 downlink command to poll the current calibration value.
1315
1316
1317 (% style="color:blue" %)**Step 4**(%%)**: **Connect the PT100 to LTC2
1318
1319 [[image:image-20220620152115-16.png]]
1320
1321
1322 For a 3 wire PT100, there are two wire are shortcut, for example, as per above photo Channel 1, there are two red wire , which are shortcut in PT100, connect them as the photo. The 3^^rd^^ wire (white wire ) connect to the left pin of Channel -1.
1323
1324
1325 == 6.3  What is the frequency range of LTC2 LoRa part? ==
1326
1327
1328 Different LTC2 version supports different frequency range, below is the table for the working frequency and recommend bands for each model:
1329
1330 [[image:image-20230427172553-5.jpeg]]
1331
1332
1333
1334 == 6.4  How to change the LoRa Frequency Bands/Region ==
1335
1336
1337 You can follow the instructions for [[how to upgrade image>>||anchor="H5.A0FirmwareChangeLogandUploadFirmware"]].
1338 When downloading the images, choose the required image file for download. ​
1339
1340
1341 = 7.  Trouble Shooting =
1342
1343 == 7.1  AT Command input doesn't work ==
1344
1345
1346 In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1347
1348
1349 = 8.  Order Info =
1350
1351
1352 Part Number **:** (% style="color:blue" %)**LTC2-XXX-YYY**
1353
1354 (% style="color:#0000ff" %)**XXX**(%%)**: **Probe Version
1355
1356 * (% style="color:red" %)**SI**(%%):  Standard IP68 probe x 1
1357 * (% style="color:red" %)**LT**(%%):  Low Temperature probe x 1
1358 * (% style="color:red" %)**HT**(%%): High Temperature probe x 1
1359 * (% style="color:red" %)**FSA**(%%):  Food Safety probe x 1
1360 * (% style="color:red" %)**FT**(%%):  Flat Type probe x 1
1361 * (% style="color:red" %)**NA**(%%): No probe
1362
1363 (% style="color:#0000ff" %)**YYY**(%%)**: **The default frequency band
1364
1365 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1366 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1367 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1368 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1369 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1370 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1371 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1372 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1373
1374
1375
1376 = 9. ​ Packing Info =
1377
1378
1379 **Package Includes**:
1380
1381 * LTC2 LoRaWAN Temperature Transmitter x 1
1382
1383 **Dimension and weight**:
1384
1385 * Device Size: cm
1386 * Device Weight: g
1387 * Package Size / pcs : cm
1388 * Weight / pcs : g
1389
1390
1391
1392 = 10.  ​Support =
1393
1394
1395 * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1396 * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].
1397
1398

Applications

Navigation

Copyright ©2010-2022 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0