Version 289.6 by Xiaoling on 2023/04/27 15:40
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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"]]
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6 (% style="text-align:center" %)
7 [[image:image-20220617163631-2.jpeg||height="704" width="617"]]
8
9
10 **Table of Contents:**
11
12 {{toc/}}
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14 (% aria-label="macro:toc widget" contenteditable="false" role="region" tabindex="-1" %)
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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"]]
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18
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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 == 1.4 Hardware Change log ==
91
92
93 LTC2 v1.0: Release.
94
95
96 == 1.5  Pin Definitions and Switch ==
97
98 === (% title="Click and drag to resize" %)1.5.1  J(%%)umper JP2 ( Power ON) ===
99
100 (% class="wikigeneratedid" id="H200B200B200B200B" %)
101 (% 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" %)​(%%)​
102
103 Put a jumper on JP2 will power on the LTC2.
104
105
106 === 1.5.2  LED ===
107
108
109 The LED will flash in below case.
110
111 (((
112 1.  Send an uplink packet
113
114
115 )))
116
117 === 1.5.3  PT100 Interfaces ===
118
119
120 (((
121 There are two independent channels to connect 2 x PT100 probes.
122 )))
123
124 (((
125 Each channel has 3-wire connection for 3-wire PT100 probes.
126 )))
127
128
129 === 1.5.4  Reset Button ===
130
131
132 Press this button will reboot the LTC2
133
134
135 === 1.6  Probe Variant ===
136
137
138 LTC2 provide default probe version. See below for the variant:
139
140
141 (% border="1" cellspacing="5" style="background-color:#f7faff; width:505px" %)
142 |=(% style="width: 78px;background-color:#D9E2F3;color:#0070C0" %)(((
143 **Model**
144 )))|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)(((
145 **Photo**
146 )))|=(% style="width: 314px;background-color:#D9E2F3;color:#0070C0" %)(((
147 **Description**
148 )))
149 |(% style="width:78px" %)(((
150 LTC2-SI
151 )))|(% style="width:117px" %)(((
152 [[image:1655458404877-785.png]]
153 )))|(% style="width:314px" %)(((
154 Standard IP68 Probe Version
155
156 * (((
157 LTC2 with 1 x Standard IP68 PT100 probe.
158 )))
159 * (((
160 Installation: Insert
161 )))
162 * (((
163 Cable Length : 2m
164 )))
165 * (((
166 PT100 Class : Class A
167 )))
168 * (((
169 Probe Dimension: 4*30mm
170 )))
171 * (((
172 Measure Range: -50 ~~ 200 °C
173 )))
174 * (((
175 Suitable Environment: General environment
176 )))
177 )))
178 |(% style="width:78px" %)(((
179 LTC2-LT
180 )))|(% style="width:117px" %)(((
181 [[image:image-20220617172838-2.png]]
182 )))|(% style="width:314px" %)(((
183 Low Temperature Version
184
185 * (((
186 LTC2 with 1 x Low Temperature PT100 probe.
187 )))
188 * (((
189 Installation: Insert
190 )))
191 * (((
192 Cable Length : 2m
193 )))
194 * (((
195 PT100 Class : Class A
196 )))
197 * (((
198 Probe Dimension: 4*30mm
199 )))
200 * (((
201 Measure Range: -196 ~~ 150 °C
202 )))
203 * (((
204 Suitable Environment: Low temperature measurement, such as COVID vaccine transport
205 )))
206 )))
207 |(% style="width:78px" %)(((
208 LTC2-FS
209 )))|(% style="width:117px" %)(((
210 [[image:image-20220617172838-3.png]]
211 )))|(% style="width:314px" %)(((
212 Food Safety Version
213
214 * (((
215 LTC2 with 1 x Food Safety PT100 probe.
216 )))
217 * (((
218 Installation: Insert
219 )))
220 * (((
221 Cable Length : 2m
222 )))
223 * (((
224 PT100 Class : Class A
225 )))
226 * (((
227 Probe Dimension: 4*150mm
228 )))
229 * (((
230 Measure Range: -50 ~~ 200 °C
231 )))
232 * (((
233 Suitable Environment: Food temperature measurement
234 )))
235 )))
236 |(% style="width:78px" %)LTC-FSA|(% style="width:117px" %)[[image:image-20221222182717-1.jpeg]]|(% style="width:314px" %)(((
237 Food Safety Version
238
239 * (((
240 LTC2 with 1 x Food Safety PT100 probe.
241 )))
242 * (((
243 Installation: Insert
244 )))
245 * (((
246 Cable Length : 2m
247 )))
248 * (((
249 PT100 Class : Class A
250 )))
251 * (((
252 Probe Dimension: 4*150mm
253 )))
254 * (((
255 Measure Range: -50 ~~ 200 °C
256 )))
257 * (((
258 Suitable Environment: Food temperature measurement
259 )))
260 )))
261 |(% style="width:78px" %)(((
262 LTC2-FT
263 )))|(% style="width:117px" %)(((
264 (% style="text-align:center" %)
265 [[image:image-20220617172838-4.png]]
266 )))|(% style="width:314px" %)(((
267 Flat Type Version
268
269 * LTC2 with 1 x Flat Type PT100 probe.
270 * Installation: Attached
271 * Cable Length : 2m
272 * PT100 Class : Class A
273 * Probe Dimension: 8*25mm
274 * Measure Range: -50 ~~ 200 °C
275 * Suitable Environment: Attached to the measure point.
276 )))
277 |(% style="width:78px" %)LTC2-HT|(% style="width:117px" %)[[image:image-20220617172838-5.png]]|(% style="width:314px" %)(((
278 High Temperature Version
279
280 * LTC2 with 1 x high temperature PT100 probe.
281 * Installation: Insert
282 * Cable Length : 3m
283 * PT100 Class : Class A
284 * Probe Dimension: 4*30mm
285 * Measure Range: -70 ~~ 550 °C
286
287 Suitable Environment: High Temperature
288 )))
289 |(% style="width:78px" %)LTC2-NA|(% style="width:117px" %)[[image:image-20220617172838-6.png]]|(% style="width:314px" %)(((
290 No Probe version:
291
292 * User can connect to their own PT100 Probe
293 * Grand Hole: M12
294 * Suitable Environment:
295
296 Connect to customized probe
297 )))
298
299 = 2.  How to use LTC2? =
300
301 == 2.1  Connect to PT100 sensors ==
302
303
304 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"]](%%).
305
306
307 === 2.2  How it works? ===
308
309
310 (((
311 (((
312 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**.
313 )))
314
315 (((
316 On each uplink, LTC2 will check its two ADC Interfaces and get the temperature from the sensor and send out to server.
317 )))
318 )))
319
320
321 == 2.3  ​Quick guide to connect to LoRaWAN server (OTAA) ==
322
323
324 (((
325 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.
326
327 (% 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]]
328 )))
329
330 (% 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" %)​(%%)​
331
332 (((
333
334
335 === 2.3.1 Step 1: Create a device in TTN with the OTAA keys from LTC2 ===
336
337
338
339 Below is TTN screen shot:
340
341 * Create Application first.
342 * Manually Add a LoRaWAN End Device device. Choose **OTAA** and **MAC v1.0.3**
343
344 [[image:1655690861020-685.png]]
345
346
347 [[image:1655690877643-259.png]]
348
349
350 Input the OTAA keys for LTC2.
351
352 Each LTC2 is shipped with a sticker with the default device EUI as below:
353
354 [[image:image-20230426083905-2.png]]
355
356
357 * **Input these keys to device portal.**
358
359 [[image:image-20220620100853-1.png]]
360
361
362
363 * **Choose the Frequency band for this end node.**
364
365 [[image:image-20220620100853-2.png]]
366
367
368 * **Input APP Key in this page as well. **
369
370 [[image:image-20220620100853-3.png]]
371
372
373 Add payload formatter So TTNv3 knows how to parse the LTC2 upload value.
374
375
376 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]]
377
378
379 [[image:image-20220620100853-4.png]]
380
381
382 === 2.3.2  Step 2: Power on LTC2 ===
383
384
385 LTC2 is power off when ship from factory.
386
387 Put a Jumper on JP2 to power on the device.
388
389
390 [[image:1655691076464-442.png]]
391
392
393
394 (((
395 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.
396 )))
397
398 (((
399 Below is an example uplink message which shows the LTC2 is sending Join Request to TTNv3.
400 )))
401
402
403 [[image:1655691086647-147.png]]
404
405
406 After join successful, LTC2 will send uplink message with the sensor value.
407
408 [[image:1655691100066-163.png]]
409
410 Above value shows Channel1 detect 25.94 degree. There is no PT100 connected on Channel 2, so it shows -327.67.
411 )))
412
413
414 == 2.4  ​Uplink Payload ==
415
416
417 Below is the uplink payload which shows
418
419
420 (% border="1" cellspacing="10" style="background-color:#f2f2f2; width:510px" %)
421 |=(% style="width: 62.5px;background-color:#D9E2F3" %)(((
422 **Size(bytes)**
423 )))|=(% 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**
424 |(% style="width:62.5px" %)**Value**|(((
425 [[BAT>>||anchor="HBAT"]]
426 )))|(((
427 [[Status & EXT>>||anchor="HStatus26EXT"]]
428 )))|(((
429 [[Channel 1 data>>||anchor="HChannel1dataandChannel2data"]]
430 )))|(((
431 [[Channel 2 data>>||anchor="HChannel1dataandChannel2data"]]
432 )))|(((
433 [[Unix TimeStamp>>||anchor="HUnixTimeStamp"]]
434 )))
435
436 (% 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"]]
437
438
439 (((
440 === (% style="color:blue" %)**BAT**(%%) ===
441
442
443 (% class="wikigeneratedid" %)
444 Ex1: 0x0E3C ⇒ 3644 (mV) = 3.644 V
445
446 (% class="wikigeneratedid" %)
447
448 )))
449
450 (((
451 === (% style="color:blue" %)**Status & EXT**(%%) ===
452
453
454 )))
455
456 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
457 |=(% 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]**
458 |=(% 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)
459
460
461 * (% style="color:#037691" %)**Poll Message Flag**(%%):  1: This message is a poll message reply, 0: means this is a normal uplink.
462 * (% 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.
463 * (% 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)
464 * (% style="color:#037691" %)**EXT**(%%):  The decode method for Channel 1 data and Channel 2 data
465 ** 0b(0001): Upload PT100 temperature, with 2 decimals, range:  **-327.67 ~~ 327.67 ℃**
466 ** 0b(0010): Upload PT100 temperature, with 1 decimals, range: ** -3276.7 ~~ 3276.7 ℃**
467 ** 0b(0011): Upload Resistance instead of Temperature, range:  **-327.67~~ 327.67 ohm**
468
469 (((
470 (% class="wikigeneratedid" %)
471
472
473
474 === (% style="color:blue" %)**Channel1 data and Channel 2 data**(%%) ===
475
476
477 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
478 |(% style="background-color:#d9e2f3; color:#0070c0; width:130px" %)(((
479 **Example Payload on channel or channel 2**
480 )))|(% style="background-color:#d9e2f3; color:#0070c0; width:130px" %)(((
481 **Sensor Value when EXT=0b(0001)**
482 )))|(% style="background-color:#d9e2f3; color:#0070c0; width:130px" %)(((
483 **Sensor Value when EXT=0b(0010)**
484 )))|(% style="background-color:#d9e2f3; color:#0070c0; width:130px" %)**Sensor Value when EXT=0b(0011)**
485 |(% style="width:312px" %)0x1422|(% style="width:258px" %)0x1422/100=51.54℃|(% style="width:263px" %)0x1422/100=515.4℃|(% style="width:259px" %)0x1422/100=51.54Ω
486 |(% style="width:312px" %)0xEC2D|(% style="width:258px" %)(0xEC2D-65536)/100=-50.75℃|(% style="width:263px" %)(0xEC2D-65536)/10=-507.5℃|(% style="width:259px" %)0xEC2D/100=604.61Ω
487 )))
488
489 (((
490 (% class="wikigeneratedid" %)
491 [[image:image-20220620103651-5.png]]
492
493
494 === (% style="color:blue" %)**Unix TimeStamp**(%%) ===
495
496
497 )))
498
499 Refer to Datalog feature.
500
501 (% style="color:#037691" %)**Example Uplink Payload**:
502
503
504 **Uplink payload example 1:**  0CE9011422EC2D6073E83B
505
506 * Bat voltage:0x0CE9 =3305mV
507 * Ext=0x01
508 * Channel1 temp=0x1422/100=51.54 ℃
509 * Channel2 temp=(0xEC2D-65536)/100=-50.75 ℃
510 * System timestamp=0x6073E83B= 1618208827(UTC)
511
512 If payload is: EC2DH :  (EC2D & 8000 == 1) , temp = (EC2DH - 65536)/100 = -50.75 ℃
513
514 （EC2D & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
515
516
517 **Uplink payload example 2: ** 0CED020203FE056073E697
518
519 * Bat voltage:0x0CED =3309mV
520 * Ext=0x02
521 * Channel1 temp=0x0203/10=515.4 ℃
522 * Channel2 temp=(0xFE05-65536)/10=-507.5 ℃
523 * System timestamp=0x6073E697=1618208407(UTC)
524
525 If payload is: FE05H :  (FE05 & 8000 == 1) , temp = (FE05H - 65536)/100 = 507.5 ℃
526
527 （EC2D & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
528
529
530 **Uplink payload example 3 :**  0CE9032EDE1F406073E967
531
532 * Bat voltage:0x0CE9 =3305mV
533 * Ext=0x03
534 * Channel1 res=0x2EDE/100=119.98 ohm
535 * Channel2 res=0x1F40/100=80.00 ohm
536 * System timestamp=0x6073E967= 1618209127(UTC)
537
538 (% 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" %)​(%%)​
539
540
541 == 2.5  Datalog Feature ==
542
543
544 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.
545
546
547 === 2.5.1  Unix TimeStamp ===
548
549
550 LTC2 uses Unix TimeStamp format based on
551
552 [[image:1655694312268-590.png]]
553
554
555 Users can get this time from the link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
556
557 Below is the converter example
558
559 [[image:1655694332878-202.png]]
560
561
562 (((
563 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set current time 2021 – Jan ~-~- 29 Friday 03:03:25
564 )))
565
566
567 === 2.5.2  Set Device Time ===
568
569
570 (((
571 (((
572 There are two ways to set the device's time:
573 )))
574 )))
575
576 (((
577 (((
578 (% style="color:#4f81bd" %)**1. Through LoRaWAN MAC Command (Default settings)**
579 )))
580 )))
581
582 (((
583 (((
584 Users need to set SYNCMOD=1 to enable sync time via the MAC command.
585 )))
586 )))
587
588 (((
589 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).
590
591
592 )))
593
594 (((
595 (((
596 (% 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.
597
598
599 )))
600
601 (((
602 (% style="color:#4f81bd" %)**2. Manually Set Time**
603 )))
604
605 (((
606 Users need to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
607 )))
608 )))
609
610
611 === 2.5.3  Poll sensor value ===
612
613
614 Users can poll sensor values based on timestamps. Below is the downlink command.
615
616 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:431px" %)
617 |=(% colspan="4" style="width: 428px;" %)**Downlink Command to poll Open/Close status (0x31)**
618 |(% style="width:60px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:122px" %)**4bytes**|(% style="width:116px" %)**1byte**
619 |(% style="width:60px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:122px" %)Timestamp end|(% style="width:116px" %)Uplink Interval
620
621 (((
622
623 )))
624
625 (((
626 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.
627
628 For example, downlink command[[image:image-20220620111056-7.png]]
629 )))
630
631 (((
632 Is to check 2021/5/16 01:00:00 to 2021/5/16 02:00:00's data
633
634 Uplink Internal =10s，means LTC2 will send one packet every 10s. range 5~~255s.
635 )))
636
637
638 === 2.5.4  Datalog Uplink payload ===
639
640
641 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"]].
642
643
644 (% style="color:red" %)**Note:**
645
646 * Poll Message Flag is set to 1.
647 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
648
649 For example, in US915 band, the max payload for different DR is:
650
651 1. **DR0: **max is 11 bytes so one entry of data
652 1. **DR1:** max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
653 1. **DR2:** total payload includes 11 entries of data
654 1. **DR3:** total payload includes 22 entries of data.
655
656 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
657
658
659 **Example:**
660
661 If LTC2 has below data inside Flash:
662
663 [[image:image-20220620134635-9.png]]
664
665
666 If user send below downlink command:
667
668 **3160A06E9060A098C00A**
669
670 Where : Start time: 60A06E90 = time 21/5/16 01:00:00
671
672 Stop time: 60A098C0 = time 21/5/16 04:00:00
673
674
675 LTC2 will uplink this payload.
676
677
678 [[image:image-20220620111850-8.png]]
679
680
681 (% style="color:red" %)**0E64410B49800160A072B8**(%%)0E61410B3F800160A077680E61410B33800160A07C180E64410B2C800160A080C80E64410B28800160A085780E64410B24800160A08A280E64410B23800160A08ED80E64410B22800160A09388(% style="color:red" %)**0E64410B1E800160A09838**
682
683
684 Where the first 11 bytes is for the first entry:
685
686 (% style="color:red" %)**0E64410B49800160A072B8**
687
688 Bat voltage:0x0E64 =3684mV
689
690
691 poll message flag & Ext=0x41,means reply data,Ext=1
692
693 Channel1 temp=0x0B49/100=28.89℃
694
695 Channel2 temp=0x8001/100=-327.67℃
696
697 System timestamp=0x60A072B8= 1621127864(UTC)
698
699
700 == 2.6  ​Alarm Mode ==
701
702
703 (((
704 LTC2 can monito the temperature in every CTTEMP time, when the temperature exceed the limit , it will uplink the sensor value immediately.
705
706 Detail commands see:
707
708 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Enable Alarm Mode**>>||anchor="H3.9EnableAlarmmode"]]
709 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Config Alarm Sampling Time**>>||anchor="H3.10Alarmchecktime"]]
710 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Set Alarm Threshold**>>||anchor="H3.11SetAlarmThreshold"]]
711
712
713 )))
714
715
716 = 3.  Configure LTC2 via AT Command or LoRaWAN Downlink =
717
718
719 (((
720 (((
721 Use can configure LTC2 via AT Command or LoRaWAN Downlink.
722 )))
723 )))
724
725 * (((
726 (((
727 AT Command Connection: See [[FAQ>>||anchor="H6.A0FAQ"]].
728 )))
729 )))
730 * (((
731 (((
732 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
733 )))
734 )))
735
736 (((
737 (((
738
739 )))
740
741 (((
742 There are two kinds of commands to configure LTC2, they are:
743 )))
744 )))
745
746 * (((
747 (((
748 (% style="color:#4f81bd" %)** General Commands**.
749 )))
750 )))
751
752 (((
753 (((
754 These commands are to configure:
755 )))
756 )))
757
758 * (((
759 (((
760 General system settings like: uplink interval.
761 )))
762 )))
763 * (((
764 (((
765 LoRaWAN protocol & radio related command.
766 )))
767 )))
768
769 (((
770 (((
771 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]]
772 )))
773 )))
774
775 (((
776 (((
777
778 )))
779 )))
780
781 * (((
782 (((
783 (% style="color:#4f81bd" %)** Commands special design for LTC2**
784 )))
785 )))
786
787 (((
788 (((
789 These commands only valid for LTC2, as below:(% title="Click and drag to resize" %)​
790 )))
791 )))
792
793 (% 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" %)​
794
795
796 == 3.1  Set Transmit Interval Time ==
797
798
799 Feature: Change LoRaWAN End Node Transmit Interval.
800
801 (% style="color:#037691" %)**AT Command: AT+TDC**
802
803 (% aria-label="image-20220610173409-7.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220610173409-7.png||data-widget="image"]](% 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"]](% 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" %)​(%%)​
804
805
806 (((
807 (% style="color:#037691" %)**Downlink Command: 0x01**
808 )))
809
810 (((
811 (((
812 Format: Command Code (0x01) followed by 3 bytes time value.
813
814 (((
815 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
816 )))
817
818 * Example 1: Downlink Payload: 0100001E  ~/~/  Set Transmit Interval (TDC) = 30 seconds
819 * Example 2: Downlink Payload: 0100003C  ~/~/  Set Transmit Interval (TDC) = 60 seconds
820 )))
821 )))
822
823
824
825 == 3.2  Enable PT100 channels ==
826
827
828 Feature: Enable PT100 channels. Default only Enable Channel 1
829
830 (% style="color:#037691" %)**AT Command: AT+ENPTCHNUM**
831
832 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:494px" %)
833 |=(% style="width: 164px;" %)**Command Example**|=(% style="width: 254px;" %)**Function**|=(% style="width: 74px;" %)**Response**
834 |(% style="width:164px" %)AT+ENPTCHNUM=?|(% style="width:254px" %)Get current ENPTCHNUM settings|(% colspan="1" rowspan="3" style="width:74px" %)(((
835 1
836
837 OK
838 )))
839 |(% style="width:164px" %)AT+ ENPTCHNUM =1|(% colspan="1" style="width:254px" %)Enable channel 1
840 |(% style="width:164px" %)AT+ ENPTCHNUM =2|(% colspan="1" style="width:254px" %)Enable channel 1 and 2
841
842 (% style="color:#037691" %)**Downlink Command: 0xA1**
843
844 Total bytes: 2 bytes
845
846 Example:
847
848 * 0xA101: same as AT+ENPTCHNUM =1
849 * 0xA102: same as AT+ENPTCHNUM =2
850
851 == 3.3  Set External Sensor Mode ==
852
853
854 (((
855 Feature: Change External Sensor Mode.
856 )))
857
858 (((
859 (% style="color:#037691" %)**Downlink Command: AT+EXT**
860 )))
861
862 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:431px" %)
863 |=(% style="width: 155px;" %)**Command Example**|=(% style="width: 180px;" %)**Function**|=(% style="width: 86px;" %)**Response**
864 |(% style="width:155px" %)AT+EXT=?|(% style="width:180px" %)Get current EXT settings|(% colspan="1" rowspan="4" style="width:86px" %)(((
865 1
866
867 OK
868 )))
869 |(% style="width:155px" %)AT+EXT=1|(% colspan="1" style="width:180px" %)Set EXT to 0b(0001)
870 |(% style="width:155px" %)AT+EXT=2|(% colspan="1" style="width:180px" %)Set EXT to 0b(0010)
871 |(% style="width:155px" %)AT+EXT=3|(% colspan="1" style="width:180px" %)Set EXT to 0b(0011)
872
873 (% style="color:#037691" %)**Downlink Command: 0xA2**
874
875 Total bytes: 2 bytes
876
877 Example:
878
879 * 0xA201: same as AT+EXT=1
880
881 == 3.4 Quit AT Command ==
882
883
884 Feature: Quit AT Command mode, so user need to input password again before use AT Commands.
885
886 (% style="color:#037691" %)**AT Command: AT+DISAT**
887
888 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:446px" %)
889 |=(% style="width: 161px;" %)**Command Example**|=(% style="width: 193px;" %)**Function**|=(% style="width: 87px;" %)**Response**
890 |(% style="width:161px" %)AT+DISAT|(% style="width:193px" %)Quit AT Commands mode|(% style="width:87px" %)OK
891
892 (% style="color:#037691" %)**Downlink Command:**
893
894 No downlink command for this feature.
895
896
897 == 3.5 Set system time ==
898
899
900 Feature: Set system time, unix format. [[See here for formmat detail.>>||anchor="H2.5.1A0UnixTimeStamp"]]
901
902 (% style="color:#037691" %)**AT Command:**
903
904 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:506px" %)
905 |=(% style="width: 218px;" %)**Command Example**|=(% style="width: 285px;" %)**Function**
906 |(% style="width:218px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
907 OK
908
909 Set System time to 2021-01-20 00:59:12
910 )))
911
912 (% style="color:#037691" %)**Downlink Command:**
913
914 0x306007806000  ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
915
916
917 == 3.6 Set Time Sync Mode ==
918
919
920 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
921
922 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.
923
924
925 (% style="color:#037691" %)**AT Command:**
926
927 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:473px" %)
928 |=(% style="width: 157px;" %)**Command Example**|=(% style="width: 313px;" %)**Function**
929 |(% style="width:157px" %)AT+SYNCMOD=1|(% style="width:313px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
930
931 (% style="color:#037691" %)**Downlink Command:**
932
933 0x28 01  ~/~/ Same As AT+SYNCMOD=1
934
935 0x28 00  ~/~/ Same As AT+SYNCMOD=0
936
937
938 == 3.7 Set Time Sync Interval ==
939
940
941 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
942
943 (% style="color:#037691" %)**AT Command:**
944
945 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:469px" %)
946 |=**Command Example**|=(% style="width: 306px;" %)**Function**
947 |AT+SYNCTDC=0x0A|(% style="width:306px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
948
949 (% style="color:#037691" %)**Downlink Command:**
950
951 0x29 0A  ~/~/ Same as AT+SYNCTDC=0x0A
952
953
954 == 3.8 Retrieve data ==
955
956
957 Feature: Retrieval data for specify time slot.
958
959 (% style="color:#037691" %)**AT Command**(%%)**:**
960
961 No AT Command, only valid for downlink command.
962
963
964 (% style="color:#037691" %)**Downlink Command:**
965
966 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
967
968
969 == 3.9 Enable Alarm mode ==
970
971
972 Feature: Enable Alarm Mode.
973
974 (% style="color:#037691" %)**AT Command: AT_WMOD**
975
976 Total bytes: 2
977
978 Example:
979
980 0xA500: AT+WMOD=0(default)
981
982 0xA501: AT+WMOD=1(alarm mode)
983
984
985 (% style="color:#037691" %)**Downlink Command:**
986
987 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
988
989
990 == 3.10 Alarm check time ==
991
992
993 Feature: The time interval to check sensor value for Alarm.
994
995 (% style="color:#037691" %)**AT Command: AT+CITEMP**
996
997 Total bytes: 3
998
999 Example:
1000
1001 0xA60001: AT+CITEMP=1(default)
1002
1003 Set collection interval in 1min,only in alarm mode
1004
1005
1006 (% style="color:#037691" %)**Downlink Command:**
1007
1008 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
1009
1010
1011 == 3.11 Set Alarm Threshold ==
1012
1013
1014 Feature: Set Alarm Threshold.
1015
1016 (% style="color:#037691" %)**AT Command: AT+ARTEMP**
1017
1018 Total bytes: 9  Unit: ℃
1019
1020 Example:
1021
1022 A7FF380320FF380320
1023
1024 AT+ARTEMP=-200,800,-200,800
1025
1026
1027 A7000A0064000A0065
1028
1029 AT+ARTEMP=10,100,10,101
1030
1031 Channel 1 operating temp:10~~100
1032
1033 Channel 2 operating temp:10~~101
1034
1035
1036 (% style="color:#037691" %)**Downlink Command:**
1037
1038 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
1039
1040
1041 == 3.12 Set Calibrate Value ==
1042
1043
1044 Feature: Set Calibrate value for PT100 cable.  Detail of use of this command please see [[connect to a customized PT100 Probe>>||anchor="H6.2A0HowtoconnectacustomizedPT100cable3F"]].
1045
1046 (% style="color:#037691" %)**AT Command: AT+RCABLE**
1047
1048 Total bytes: 5
1049
1050 Example:
1051
1052 AT+RCABLE=296,300
1053
1054 Channel 1 rcable=0x0128/1000=0.296R
1055
1056 Channel 2 rcable=0x012C/1000=0.300R
1057
1058
1059 (% style="color:#037691" %)**Downlink Command:**
1060
1061 0xA80128012C  ~-~->  Same as AT+RCABLE=296,300
1062
1063
1064 == 3.13 Poll Calibrate Value ==
1065
1066
1067 Feature: Poll Calibrate value. LTC2 will reply with this command send an uplink to server.
1068
1069 (% style="color:#037691" %)**AT Command: No AT Command.**
1070
1071
1072 (% style="color:#037691" %)**Downlink Command:**
1073
1074 Example: A901
1075
1076 End nodes will send racable config to server
1077
1078 Like uplink payload: 010128012C
1079
1080
1081 == 3.14 Print data entries base on page ==
1082
1083
1084 Feature: Print the sector data from start page to stop page (max is 400 pages).
1085
1086 (% style="color:#037691" %)**AT Command: AT+PDTA**
1087
1088 [[image:image-20220620145822-10.png]]
1089
1090
1091 (% style="color:#037691" %)**Downlink Command:**
1092
1093 No downlink commands for feature
1094
1095
1096 == 3.15 Print last few data entries ==
1097
1098
1099 Feature: Print the last few data entries
1100
1101 (% style="color:#037691" %)**AT Command: AT+PLDTA**
1102
1103 [[image:image-20220620145916-11.png]]
1104
1105
1106 (% style="color:#037691" %)**Downlink Command:**
1107
1108 No downlink commands for feature
1109
1110
1111 == 3.16 Clear Flash Record ==
1112
1113
1114 Feature: Clear flash storage for data log feature.
1115
1116 (% style="color:#037691" %)**AT Command: AT+CLRDTA**
1117
1118 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:511px" %)
1119 |=(% style="width: 157px;" %)**Command Example**|=(% style="width: 136px;" %)**Function**|=(% style="width: 213px;" %)**Response**
1120 |(% style="width:157px" %)AT+CLRDTA|(% style="width:136px" %)Clear date record|(% style="width:213px" %)(((
1121 Clear all stored sensor data…
1122
1123 OK
1124 )))
1125
1126 (% style="color:#037691" %)**Downlink Command: 0xA3**
1127
1128 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1129
1130 = 4.  Battery & Power Consumption =
1131
1132
1133 LTC2 uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
1134
1135 [[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
1136
1137
1138 = 5.  Firmware Change Log and Upload Firmware =
1139
1140 = (% style="display:none" %) (%%) =
1141
1142 (((
1143 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:
1144 )))
1145
1146 (((
1147
1148 )))
1149
1150 (((
1151 **Connection:**
1152 )))
1153
1154 * (((
1155 (% style="background-color:yellow" %)**ST-LINK v2 GND  <~-~->  LTC2 GND**
1156 )))
1157 * (((
1158 (% style="background-color:yellow" %)**ST-LINK v2 RESET  <~-~->  LTC2 NRST**
1159 )))
1160 * (((
1161 (% style="background-color:yellow" %)**ST-LINK v2 SWCLK  <~-~->  LTC2 SWCLK**
1162 )))
1163 * (((
1164 (% style="background-color:yellow" %)**ST-LINK v2 SWDIO  <~-~->  LTC2 SWDIO**
1165 )))
1166 * (((
1167 (% style="background-color:yellow" %)**LTC2 power must be on.  **
1168 )))
1169
1170 (((
1171
1172
1173 **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]]
1174
1175
1176 )))
1177
1178 = 6.  FAQ =
1179
1180 == 6.1  How to use AT Command to configure LTC2 ==
1181
1182
1183 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.
1184
1185
1186 **Connection:**
1187
1188 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->  LTC2 GND**
1189 * (% style="background-color:yellow" %)**USB to TTL RXD  <~-~->  LTC2 TXD**
1190 * (% style="background-color:yellow" %)**USB to TTL TXD  <~-~->  LTC2 RXD**
1191
1192 (((
1193 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.
1194 )))
1195
1196 (((
1197
1198 )))
1199
1200 (((
1201 Input password and ATZ to activate LTC2,As shown below:
1202 )))
1203
1204 [[image:image-20220620151601-13.png||height="454" width="1204"]]
1205
1206
1207 == 6.2  How to connect a customized PT100 cable? ==
1208
1209
1210 (((
1211 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. 
1212 )))
1213
1214 (((
1215
1216 )))
1217
1218 (((
1219 (% 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.
1220 )))
1221
1222 [[image:image-20220620152115-14.jpeg||height="548" width="763"]]
1223
1224 We know that the Multimeter has a shortcut resistance 0.002 ohm.
1225
1226
1227 (% style="color:blue" %)**Step 2**(%%): Measure the resistance between the two shorted wires of PT100 Probe.
1228
1229
1230 [[image:image-20220620152115-15.jpeg||height="791" width="704"]]
1231
1232 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) .
1233
1234
1235 (% style="color:blue" %)**Step 3**(%%): Run Calibrate Command.
1236
1237 Run this command to both channels to use 0.296R calibrate resistance.
1238
1239 (% style="color:red" %)**AT+RCABLE=296,0** (%%) ~-~->  Calibrate Channel 1 with 0.296R
1240
1241
1242 Or use LoRaWAN downlink command (0xA8 Code) to set:
1243
1244 0xA801280000
1245
1246
1247 User can use 0xA9 downlink command to poll the current calibration value.
1248
1249
1250 (% style="color:blue" %)**Step 4**(%%)**: **Connect the PT100 to LTC2
1251
1252 [[image:image-20220620152115-16.png]]
1253
1254
1255 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.
1256
1257
1258 == 6.3  What is the frequency range of LTC2 LoRa part? ==
1259
1260
1261 Different LTC2 version supports different frequency range, below is the table for the working frequency and recommend bands for each model:
1262
1263 [[image:image-20220620151440-12.png]]
1264
1265
1266 == 6.4  How to change the LoRa Frequency Bands/Region ==
1267
1268
1269 You can follow the instructions for [[how to upgrade image>>||anchor="H5.A0FirmwareChangeLogandUploadFirmware"]].
1270 When downloading the images, choose the required image file for download. ​
1271
1272
1273 = 7.  Trouble Shooting =
1274
1275 == 7.1  AT Command input doesn't work ==
1276
1277
1278 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.
1279
1280
1281 = 8.  Order Info =
1282
1283
1284 Part Number **:** (% style="color:blue" %)**LTC2-XXX-YYY**
1285
1286 (% style="color:#0000ff" %)**XXX**(%%)**: **Probe Version
1287
1288 * (% style="color:red" %)**SI**(%%):  Standard IP68 probe x 1
1289 * (% style="color:red" %)**LT**(%%):  Low Temperature probe x 1
1290 * (% style="color:red" %)**HT**(%%): High Temperature probe x 1
1291 * (% style="color:red" %)**FSA**(%%):  Food Safety probe x 1
1292 * (% style="color:red" %)**FT**(%%):  Flat Type probe x 1
1293 * (% style="color:red" %)**NA**(%%): No probe
1294
1295 (% style="color:#0000ff" %)**YYY**(%%)**: **The default frequency band
1296
1297 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1298 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1299 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1300 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1301 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1302 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1303 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1304 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1305
1306 = 9. ​ Packing Info =
1307
1308
1309 **Package Includes**:
1310
1311 * LTC2 LoRaWAN Temperature Transmitter x 1
1312
1313 **Dimension and weight**:
1314
1315 * Device Size: cm
1316 * Device Weight: g
1317 * Package Size / pcs : cm
1318 * Weight / pcs : g
1319
1320 = 10.  ​Support =
1321
1322
1323 * 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.
1324 * 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]].
1325
1326

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