Version 283.6 by Xiaoling on 2022/07/01 16:13
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
62
63 == ​1.2  Features ==
64
65
66 * LoRaWAN v1.0.3 Class A
67 * max: 2 x monitor temperature channels
68 * Support 3 -wire PT-100
69 * 8500mAh Li-SOCI2 Battery
70 * Firmware upgrade via console
71 * Wall Mountable
72 * Configurable via LoRa or UART
73 * Datalog and retrieve via LoRaWAN
74 * Use pre-load PT100 probe or 3rd PT100 probe
75 * Factory calibration for different resistance range
76 * Support accuracy measure of resistance and upload
77 * Battery Monitoring and upload
78
79 (% style="display:none" %) ** **
80
81
82
83 == 1.3 ​ Applications ==
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 LTC2 v1.0: Release.
95
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)(% 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" %)​(%%)​ ===
101
102 Put a jumper on JP2 will power on the LTC2.
103
104
105 === 1.5.2  LED ===
106
107 The LED will flash in below case.
108
109 1. Send an uplink packet
110
111
112
113 === 1.5.3  PT100 Interfaces ===
114
115 (((
116 There are two independent channels to connect 2 x PT100 probes.
117 )))
118
119 (((
120 Each channel has 3-wire connection for 3-wire PT100 probes.
121 )))
122
123
124 === 1.5.4  Reset Button ===
125
126 Press this button will reboot the LTC2
127
128
129 === 1.6  Probe Variant ===
130
131 LTC2 provide default probe version. See below for the variant:
132
133 (% border="1" cellspacing="10" style="background-color:#f7faff; width:505px" %)
134 |=(% style="width: 78px;" %)**Model**|=(% style="width: 117px;" %)**Photo**|=(% style="width: 314px;" %)**Description**
135 |(% style="width:78px" %)LTC2-SI|(% style="width:117px" %)[[image:1655458404877-785.png]]|(% style="width:314px" %)(((
136 Standard IP68 Probe Version
137
138 * LTC2 with 1 x Standard IP68 PT100 probe.
139 * Installation: Insert
140 * Cable Length : 2m
141 * PT100 Class : Class A
142 * Probe Dimension: 4*30mm
143 * Measure Range: -50 ~~ 200 °C
144 * Suitable Environment: General environment
145 )))
146 |(% style="width:78px" %)LTC2-LT|(% style="width:117px" %)[[image:image-20220617172838-2.png]]|(% style="width:314px" %)(((
147 Low Temperature Version
148
149 * LTC2 with 1 x Low Temperature PT100 probe.
150 * Installation: Insert
151 * Cable Length : 2m
152 * PT100 Class : Class A
153 * Probe Dimension: 4*30mm
154 * Measure Range: -196 ~~ 150 °C
155 * Suitable Environment: Low temperature measurement, such as COVID vaccine transport
156 )))
157 |(% style="width:78px" %)LTC2-FS|(% style="width:117px" %)[[image:image-20220617172838-3.png]]|(% style="width:314px" %)(((
158 Food Safety Version
159
160 * LTC2 with 1 x Food Safety PT100 probe.
161 * Installation: Insert
162 * Cable Length : 2m
163 * PT100 Class : Class A
164 * Probe Dimension: 4*150mm
165 * Measure Range: -50 ~~ 200 °C
166 * Suitable Environment: Food temperature measurement
167 )))
168 |(% style="width:78px" %)LTC2-FT|(% style="width:117px" %)(((
169 (% style="text-align:center" %)
170 [[image:image-20220617172838-4.png]]
171 )))|(% style="width:314px" %)(((
172 Flat Type Version
173
174 * LTC2 with 1 x Flat Type PT100 probe.
175 * Installation: Attached
176 * Cable Length : 2m
177 * PT100 Class : Class A
178 * Probe Dimension: 8*25mm
179 * Measure Range: -50 ~~ 200 °C
180 * Suitable Environment: Attached to the measure point.
181 )))
182 |(% style="width:78px" %)LTC2-HT|(% style="width:117px" %)[[image:image-20220617172838-5.png]]|(% style="width:314px" %)(((
183 High Temperature Version
184
185 * LTC2 with 1 x high temperature PT100 probe.
186 * Installation: Insert
187 * Cable Length : 3m
188 * PT100 Class : Class A
189 * Probe Dimension: 4*30mm
190 * Measure Range: -70 ~~ 550 °C
191
192 Suitable Environment: High Temperature
193 )))
194 |(% style="width:78px" %)LTC2-NA|(% style="width:117px" %)[[image:image-20220617172838-6.png]]|(% style="width:314px" %)(((
195 No Probe version:
196
197 * User can connect to their own PT100 Probe
198 * Grand Hole: M12
199 * Suitable Environment:
200
201 Connect to customized probe
202 )))
203
204
205
206 = 2.  How to use LTC2? =
207
208 == 2.1  Connect to PT100 sensors ==
209
210 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"]](%%).
211
212
213 === 2.2  How it works? ===
214
215 (((
216 (((
217 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**.
218 )))
219
220 (((
221 On each uplink, LTC2 will check its two ADC Interfaces and get the temperature from the sensor and send out to server.
222 )))
223 )))
224
225
226
227 == 2.3  ​Quick guide to connect to LoRaWAN server (OTAA) ==
228
229 (((
230 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.
231
232 (% 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]]
233 )))
234
235 (% 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" %)​(%%)​
236
237 (((
238
239
240 === 2.3.1 Step 1: Create a device in TTN with the OTAA keys from LTC2 ===
241
242
243
244 Below is TTN screen shot:
245
246 * Create Application first.
247 * Manually Add a LoRaWAN End Device device. Choose **OTAA** and **MAC v1.0.3**
248
249 [[image:1655690861020-685.png]]
250
251
252 [[image:1655690877643-259.png]]
253
254
255 Input the OTAA keys for LTC2.
256
257 Each LTC2 is shipped with a sticker with the default device EUI as below:
258
259 (% aria-label="image-20220607170145-1.jpeg image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220607170145-1.jpeg||data-widget="image"]]
260
261
262 * **Input these keys to device portal.**
263
264 [[image:image-20220620100853-1.png]]
265
266
267
268 * **Choose the Frequency band for this end node.**
269
270 [[image:image-20220620100853-2.png]]
271
272
273 * **Input APP Key in this page as well. **
274
275 [[image:image-20220620100853-3.png]]
276
277
278
279 Add payload formatter So TTNv3 knows how to parse the LTC2 upload value.
280
281
282 The payload for TTN can be found at below link:
283
284 [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/LTC2/Decoder/>>https://www.dragino.com/downloads/downloads/LoRa_End_Node/LTC2/Decoder/]]
285
286
287 [[image:image-20220620100853-4.png]]
288
289
290
291
292 === 2.3.2  Step 2: Power on LTC2 ===
293
294
295 LTC2 is power off when ship from factory.
296
297 Put a Jumper on JP2 to power on the device.
298
299
300 [[image:1655691076464-442.png]]
301
302
303
304 (((
305 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.
306 )))
307
308 (((
309 Below is an example uplink message which shows the LTC2 is sending Join Request to TTNv3.
310 )))
311
312
313 [[image:1655691086647-147.png]]
314
315
316 After join successful, LTC2 will send uplink message with the sensor value.
317
318 [[image:1655691100066-163.png]]
319
320 Above value shows Channel1 detect 25.94 degree. There is no PT100 connected on Channel 2, so it shows -327.67.
321
322
323 )))
324
325
326 == 2.4  ​Uplink Payload ==
327
328 (((
329 (((
330 (((
331 Below is the uplink payload which shows
332 )))
333 )))
334 )))
335
336 (((
337
338 )))
339
340 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
341 |=(% style="width: 62.5px;" %)(((
342 **Size (bytes)**
343 )))|=(% style="width: 62.5px;" %)**2**|=**1**|=2|=2|=**4**
344 |(% style="width:62.5px" %)**Value**|(((
345 [[BAT>>||anchor="HBAT"]]
346
347
348 )))|(((
349 [[Status & EXT>>||anchor="HStatus26EXT"]]
350 )))|(((
351 [[Channel 1 data>>||anchor="HChannel1dataandChannel2data"]]
352 )))|(((
353 [[Channel 2 data>>||anchor="HChannel1dataandChannel2data"]]
354 )))|(((
355 [[Unix TimeStamp>>||anchor="HUnixTimeStamp"]]
356 )))
357
358 (% 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"]]
359
360
361 (((
362 === (% style="color:blue" %)**BAT**(%%) ===
363
364 (% class="wikigeneratedid" %)
365 Ex1: 0x0E3C ⇒ 3644 (mV) = 3.644 V
366
367 (% class="wikigeneratedid" %)
368
369 )))
370
371 (((
372 === (% style="color:blue" %)**Status & EXT**(%%) ===
373 )))
374
375 [[image:image-20220620103724-6.png]]
376
377 * (% style="color:#037691" %)**Poll Message Flag**(%%):  1: This message is a poll message reply, 0: means this is a normal uplink.
378 * (% 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.
379 * (% 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)
380 * (% style="color:#037691" %)**EXT**(%%):  The decode method for Channel 1 data and Channel 2 data
381 ** 0b(0001): Upload PT100 temperature, with 2 decimals, range:  **-327.67 ~~ 327.67 ℃**
382 ** 0b(0010): Upload PT100 temperature, with 1 decimals, range: ** -3276.7 ~~ 3276.7 ℃**
383 ** 0b(0011): Upload Resistance instead of Temperature, range:  **-327.67~~ 327.67 ohm**
384
385 (((
386 (% class="wikigeneratedid" %)
387
388
389
390 === (% style="color:blue" %)**Channel1 data and Channel 2 data**(%%) ===
391 )))
392
393 (((
394 (% class="wikigeneratedid" %)
395 [[image:image-20220620103651-5.png]]
396
397
398 === (% style="color:blue" %)**Unix TimeStamp**(%%) ===
399 )))
400
401 Refer to Datalog feature.
402
403 (% style="color:#037691" %)**Example Uplink Payload**:
404
405 **Uplink payload example 1:**  0CE9011422EC2D6073E83B
406
407 * Bat voltage:0x0CE9 =3305mV
408 * Ext=0x01
409 * Channel1 temp=0x1422/100=51.54 ℃
410 * Channel2 temp=(0xEC2D-65536)/100=-50.75 ℃
411 * System timestamp=0x6073E83B= 1618208827(UTC)
412
413
414 **Uplink payload example 2: ** 0CED020203FE056073E697
415
416 * Bat voltage:0x0CED =3309mV
417 * Ext=0x02
418 * Channel1 temp=0x0203/10=515.4 ℃
419 * Channel2 temp=(0xFE05-65536)/10=-507.5 ℃
420 * System timestamp=0x6073E697=1618208407(UTC)
421
422
423 **Uplink payload example 3 :**  0CE9032EDE1F406073E967
424
425 * Bat voltage:0x0CE9 =3305mV
426 * Ext=0x03
427 * Channel1 res=0x2EDE/100=119.98 ohm
428 * Channel2 res=0x1F40/100=80.00 ohm
429 * System timestamp=0x6073E967= 1618209127(UTC)
430
431 (% 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" %)​(%%)​
432
433
434 == 2.5  Datalog Feature ==
435
436 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.
437
438
439 === 2.5.1  Unix TimeStamp ===
440
441
442 LTC2 uses Unix TimeStamp format based on
443
444 [[image:1655694312268-590.png]]
445
446 Users can get this time from the link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
447
448 Below is the converter example
449
450 [[image:1655694332878-202.png]]
451
452
453 (((
454 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set current time 2021 – Jan ~-~- 29 Friday 03:03:25
455 )))
456
457
458 === 2.5.2  Set Device Time ===
459
460 (((
461 (((
462 There are two ways to set the device's time:
463 )))
464 )))
465
466 (((
467 (((
468 (% style="color:#4f81bd" %)**1. Through LoRaWAN MAC Command (Default settings)**
469 )))
470 )))
471
472 (((
473 (((
474 Users need to set SYNCMOD=1 to enable sync time via the MAC command.
475 )))
476 )))
477
478 (((
479 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).
480
481
482 )))
483
484 (((
485 (((
486 (% 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.
487
488
489 )))
490
491 (((
492 (% style="color:#4f81bd" %)**2. Manually Set Time**
493 )))
494
495 (((
496 Users need to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
497 )))
498 )))
499
500
501
502 === 2.5.3  Poll sensor value ===
503
504 Users can poll sensor values based on timestamps. Below is the downlink command.
505
506 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:453.989px" %)
507 |=(% colspan="4" style="width: 451px;" %)**Downlink Command to poll Open/Close status (0x31)**
508 |(% style="width:59px" %)**1byte**|(% style="width:126px" %)**4bytes**|(% style="width:138px" %)**4bytes**|(% style="width:128px" %)**1byte**
509 |(% style="width:59px" %)31|(% style="width:126px" %)Timestamp start|(% style="width:138px" %)Timestamp end|(% style="width:128px" %)Uplink Interval
510
511 (((
512
513 )))
514
515 (((
516 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.
517
518 For example, downlink command[[image:image-20220620111056-7.png]]
519 )))
520
521 (((
522 Is to check 2021/5/16 01:00:00 to 2021/5/16 02:00:00's data
523
524 Uplink Internal =10s，means LTC2 will send one packet every 10s. range 5~~255s.
525 )))
526
527
528
529 === 2.5.4  Datalog Uplink payload ===
530
531 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"]].
532
533
534 (% style="color:red" %)**Note:**
535
536 * Poll Message Flag is set to 1.
537 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
538
539 For example, in US915 band, the max payload for different DR is:
540
541 1. DR0: max is 11 bytes so one entry of data
542 1. DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
543 1. DR2: total payload includes 11 entries of data
544 1. DR3: total payload includes 22 entries of data.
545
546 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
547
548
549 **Example:**
550
551 If LTC2 has below data inside Flash:
552
553 [[image:image-20220620134635-9.png]]
554
555
556 If user send below downlink command:
557
558 **3160A06E9060A098C00A**
559
560 Where : Start time: 60A06E90 = time 21/5/16 01:00:00
561
562 Stop time: 60A098C0 = time 21/5/16 04:00:00
563
564
565 LTC2 will uplink this payload.
566
567
568 [[image:image-20220620111850-8.png]]
569
570 (% style="color:red" %)**0E64410B49800160A072B8**(%%)0E61410B3F800160A077680E61410B33800160A07C180E64410B2C800160A080C80E64410B28800160A085780E64410B24800160A08A280E64410B23800160A08ED80E64410B22800160A09388(% style="color:red" %)**0E64410B1E800160A09838**
571
572
573 Where the first 11 bytes is for the first entry:
574
575 (% style="color:red" %)**0E64410B49800160A072B8**
576
577 Bat voltage:0x0E64 =3684mV
578
579
580 poll message flag & Ext=0x41,means reply data,Ext=1
581
582 Channel1 temp=0x0B49/100=28.89℃
583
584 Channel2 temp=0x8001/100=-327.67℃
585
586 System timestamp=0x60A072B8= 1621127864(UTC)
587
588
589
590 == 2.6  ​Alarm Mode ==
591
592 (((
593 LTC2 can monito the temperature in every CTTEMP time, when the temperature exceed the limit , it will uplink the sensor value immediately.
594
595 Detail commands see:
596
597 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Enable Alarm Mode**>>||anchor="H3.9EnableAlarmmode"]]
598 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Config Alarm Sampling Time**>>||anchor="H3.10Alarmchecktime"]]
599 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Set Alarm Threshold**>>||anchor="H3.11SetAlarmThreshold"]]
600
601
602 )))
603
604
605 = 3.  Configure LTC2 via AT Command or LoRaWAN Downlink =
606
607 (((
608 (((
609 Use can configure LTC2 via AT Command or LoRaWAN Downlink.
610 )))
611 )))
612
613 * (((
614 (((
615 AT Command Connection: See [[FAQ>>||anchor="H6.A0FAQ"]].
616 )))
617 )))
618 * (((
619 (((
620 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
621 )))
622 )))
623
624 (((
625 (((
626
627 )))
628
629 (((
630 There are two kinds of commands to configure LTC2, they are:
631 )))
632 )))
633
634 * (((
635 (((
636 (% style="color:#4f81bd" %)** General Commands**.
637 )))
638 )))
639
640 (((
641 (((
642 These commands are to configure:
643 )))
644 )))
645
646 * (((
647 (((
648 General system settings like: uplink interval.
649 )))
650 )))
651 * (((
652 (((
653 LoRaWAN protocol & radio related command.
654 )))
655 )))
656
657 (((
658 (((
659 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]]
660 )))
661 )))
662
663 (((
664 (((
665
666 )))
667 )))
668
669 * (((
670 (((
671 (% style="color:#4f81bd" %)** Commands special design for LTC2**
672 )))
673 )))
674
675 (((
676 (((
677 These commands only valid for LTC2, as below:(% title="Click and drag to resize" %)​
678 )))
679 )))
680
681 (% 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" %)​
682
683
684
685 == 3.1  Set Transmit Interval Time ==
686
687 Feature: Change LoRaWAN End Node Transmit Interval.
688
689 (% style="color:#037691" %)**AT Command: AT+TDC**
690
691 (% 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" %)​(%%)​
692
693
694 (((
695 (% style="color:#037691" %)**Downlink Command: 0x01**
696 )))
697
698 (((
699 (((
700 Format: Command Code (0x01) followed by 3 bytes time value.
701
702 (((
703 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
704 )))
705
706 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
707 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
708 )))
709 )))
710
711
712
713 == 3.2  Enable PT100 channels ==
714
715 Feature: Enable PT100 channels. Default only Enable Channel 1
716
717 (% style="color:#037691" %)**AT Command: AT+ENPTCHNUM**
718
719 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:494px" %)
720 |=(% style="width: 165px;" %)**Command Example**|=(% style="width: 254px;" %)**Function**|=(% style="width: 73px;" %)**Response**
721 |(% style="width:165px" %)AT+ENPTCHNUM=?|(% style="width:254px" %)Get current ENPTCHNUM settings|(% style="width:73px" %)(((
722 1
723
724 OK
725 )))
726 |(% style="width:165px" %)AT+ ENPTCHNUM =1|(% colspan="2" style="width:327px" %)Enable channel 1
727 |(% style="width:165px" %)AT+ ENPTCHNUM =2|(% colspan="2" style="width:327px" %)Enable channel 1 and 2
728
729 (% style="color:#037691" %)**Downlink Command: 0xA1**
730
731 Total bytes: 2 bytes
732
733 Example:
734
735 * 0xA101: same as AT+ENPTCHNUM =1
736 * 0xA102: same as AT+ENPTCHNUM =2
737
738
739
740 == 3.3  Set External Sensor Mode ==
741
742 (((
743 Feature: Change External Sensor Mode.
744 )))
745
746 (((
747 (% style="color:#037691" %)**Downlink Command: AT+EXT**
748 )))
749
750 (% 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" %)​(%%)​
751
752 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:428px" %)
753 |=(% style="width: 155px;" %)**Command Example**|=(% style="width: 180px;" %)**Function**|=(% style="width: 90px;" %)**Response**
754 |(% style="width:155px" %)AT+EXT=?|(% style="width:180px" %)Get current EXT settings|(% style="width:90px" %)(((
755 1
756
757 OK
758 )))
759 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" style="width:270px" %)Set EXT to 0b(0001)
760 |(% style="width:155px" %)AT+EXT=2|(% colspan="2" style="width:270px" %)Set EXT to 0b(0010)
761 |(% style="width:155px" %)AT+EXT=3|(% colspan="2" style="width:270px" %)Set EXT to 0b(0011)
762
763 (% style="color:#037691" %)**Downlink Command: 0xA2**
764
765 Total bytes: 2 bytes
766
767 Example:
768
769 * 0xA201: same as AT+EXT=1
770
771
772
773 == 3.4 Quit AT Command ==
774
775 Feature: Quit AT Command mode, so user need to input password again before use AT Commands.
776
777 (% style="color:#037691" %)**AT Command: AT+DISAT**
778
779 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:446px" %)
780 |=(% style="width: 161px;" %)**Command Example**|=(% style="width: 193px;" %)**Function**|=(% style="width: 87px;" %)**Response**
781 |(% style="width:161px" %)AT+DISAT|(% style="width:193px" %)Quit AT Commands mode|(% style="width:87px" %)OK
782
783 (% style="color:#037691" %)**Downlink Command:**
784
785 No downlink command for this feature.
786
787
788
789 == 3.5 Set system time ==
790
791 Feature: Set system time, unix format. [[See here for formmat detail.>>||anchor="H2.5.1A0UnixTimeStamp"]]
792
793 (% style="color:#037691" %)**AT Command:**
794
795 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:506px" %)
796 |=(% style="width: 218px;" %)**Command Example**|=(% style="width: 285px;" %)**Function**
797 |(% style="width:218px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
798 OK
799
800 Set System time to 2021-01-20 00:59:12
801 )))
802
803 (% style="color:#037691" %)**Downlink Command:**
804
805 0x306007806000  ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
806
807
808
809 == 3.6 Set Time Sync Mode ==
810
811 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
812
813
814 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.
815
816
817 (% style="color:#037691" %)**AT Command:**
818
819 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:473px" %)
820 |=(% style="width: 157px;" %)**Command Example**|=(% style="width: 313px;" %)**Function**
821 |(% style="width:157px" %)AT+SYNCMOD=1|(% style="width:313px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
822
823 (% style="color:#037691" %)**Downlink Command:**
824
825 0x28 01 ~/~/ Same As AT+SYNCMOD=1
826
827 0x28 00 ~/~/ Same As AT+SYNCMOD=0
828
829
830
831 == 3.7 Set Time Sync Interval ==
832
833 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
834
835 (% style="color:#037691" %)**AT Command:**
836
837 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
838 |=**Command Example**|=(% style="width: 306px;" %)**Function**
839 |AT+SYNCTDC=0x0A|(% style="width:306px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
840
841 (% style="color:#037691" %)**Downlink Command:**
842
843 0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
844
845
846
847 == 3.8 Retrieve data ==
848
849 Feature: Retrieval data for specify time slot.
850
851 (% style="color:#037691" %)**AT Command**(%%)**:**
852
853 No AT Command, only valid for downlink command.
854
855
856 (% style="color:#037691" %)**Downlink Command:**
857
858 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
859
860
861
862 == 3.9 Enable Alarm mode ==
863
864 Feature: Enable Alarm Mode.
865
866 (% style="color:#037691" %)**AT Command: AT_WMOD**
867
868 Total bytes: 2
869
870 Example:
871
872 0xA500: AT+WMOD=0(default)
873
874 0xA501: AT+WMOD=1(alarm mode)
875
876
877 (% style="color:#037691" %)**Downlink Command:**
878
879 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
880
881
882
883 == 3.10 Alarm check time ==
884
885 Feature: The time interval to check sensor value for Alarm.
886
887 (% style="color:#037691" %)**AT Command: AT+CITEMP**
888
889 Total bytes: 3
890
891 Example:
892
893 0xA60001: AT+CITEMP=1(default)
894
895 Set collection interval in 1min,only in alarm mode
896
897
898 (% style="color:#037691" %)**Downlink Command:**
899
900 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
901
902
903
904 == 3.11 Set Alarm Threshold ==
905
906 Feature: Set Alarm Threshold.
907
908 (% style="color:#037691" %)**AT Command: AT+ARTEMP**
909
910 Total bytes: 9  Unit: ℃
911
912 Example:
913
914 A7FF380320FF380320
915
916 AT+ARTEMP=-200,800,-200,800
917
918
919 A7000A0064000A0065
920
921 AT+ARTEMP=10,100,10,101
922
923 Channel 1 operating temp:10~~100
924
925 Channel 2 operating temp:10~~101
926
927
928 (% style="color:#037691" %)**Downlink Command:**
929
930 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
931
932
933
934 == 3.12 Set Calibrate Value ==
935
936 Feature: Set Calibrate value for PT100 cable.  Detail of use of this command please see [[connect to a customized PT100 Probe>>||anchor="H6.2A0HowtoconnectacustomizedPT100cable3F"]].
937
938 (% style="color:#037691" %)**AT Command: AT+RCABLE**
939
940 Total bytes: 5
941
942 Example:
943
944 AT+RCABLE=296,300
945
946 Channel 1 rcable=0x0128/1000=0.296R
947
948 Channel 2 rcable=0x012C/1000=0.300R
949
950
951 (% style="color:#037691" %)**Downlink Command:**
952
953 0xA80128012C  ~-~->  Same as AT+RCABLE=296,300
954
955
956
957 == 3.13 Poll Calibrate Value ==
958
959 Feature: Poll Calibrate value. LTC2 will reply with this command send an uplink to server.
960
961 (% style="color:#037691" %)**AT Command: No AT Command.**
962
963
964 (% style="color:#037691" %)**Downlink Command:**
965
966 Example: A901
967
968 End nodes will send racable config to server
969
970 Like uplink payload: 010128012C
971
972
973
974 == 3.14 Print data entries base on page ==
975
976 Feature: Print the sector data from start page to stop page (max is 400 pages).
977
978 (% style="color:#037691" %)**AT Command: AT+PDTA**
979
980 [[image:image-20220620145822-10.png]]
981
982
983 (% style="color:#037691" %)**Downlink Command:**
984
985 No downlink commands for feature
986
987
988
989 == 3.15 Print last few data entries ==
990
991 Feature: Print the last few data entries
992
993 (% style="color:#037691" %)**AT Command: AT+PLDTA**
994
995 [[image:image-20220620145916-11.png]]
996
997
998 (% style="color:#037691" %)**Downlink Command:**
999
1000 No downlink commands for feature
1001
1002
1003
1004 == 3.16 Clear Flash Record ==
1005
1006 Feature: Clear flash storage for data log feature.
1007
1008 (% style="color:#037691" %)**AT Command: AT+CLRDTA**
1009
1010 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:511px" %)
1011 |=(% style="width: 157px;" %)**Command Example**|=(% style="width: 136px;" %)**Function**|=(% style="width: 213px;" %)**Response**
1012 |(% style="width:157px" %)AT+CLRDTA|(% style="width:136px" %)Clear date record|(% style="width:213px" %)(((
1013 Clear all stored sensor data…
1014
1015 OK
1016 )))
1017
1018 (% style="color:#037691" %)**Downlink Command: 0xA3**
1019
1020 * Example: 0xA301 ~/~/Same as AT+CLRDTA
1021
1022
1023
1024 = 4.  Battery & How to replace =
1025
1026 == 4.1  Battery Type ==
1027
1028 (((
1029 LTC2 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.
1030 )))
1031
1032 (((
1033 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1034 )))
1035
1036 (% aria-label="1654593587246-335.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654593587246-335.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; left:0px; top:-15px" 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:url(~"http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png~") rgba(220, 220, 220, 0.5); left:0px; top:-15px" tabindex="-1" %)​(%%)​
1037
1038
1039 Minimum Working Voltage for the LTC2:
1040
1041 LTC2:  3.0v ~~ 3.6v
1042
1043
1044
1045 == 4.2  Replace Battery ==
1046
1047 (((
1048
1049
1050 (((
1051 Any battery with 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
1052 )))
1053 )))
1054
1055 (((
1056 (((
1057 And make sure the positive and negative pins match.
1058 )))
1059 )))
1060
1061
1062
1063 == 4.3  Power Consumption Analyze ==
1064
1065 (((
1066 Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
1067 )))
1068
1069 (((
1070 Instruction to use as below:
1071 )))
1072
1073
1074 **Step 1 :**  Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
1075
1076 [[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
1077
1078
1079 **Step 2 :**  Open it and choose
1080
1081 * Product Model
1082 * Uplink Interval
1083 * Working Mode
1084
1085 And the Life expectation in difference case will be shown on the right.
1086
1087 (% aria-label="1654593605679-189.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654593605679-189.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"]][[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; left:0px; top:-15px" 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:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png) rgba(220, 220, 220, 0.5); left:0px; top:-15px" 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; left:0px; top:-15px" 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:url(~"http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png~") rgba(220, 220, 220, 0.5); left:0px; top:-15px" tabindex="-1" %)​(%%)​
1088
1089
1090
1091 = 5.  Firmware Change Log and Upload Firmware(% style="display:none" %) (%%) =
1092
1093 (((
1094 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:
1095 )))
1096
1097 (((
1098
1099 )))
1100
1101 (((
1102 **Connection:**
1103 )))
1104
1105 * (((
1106 (% style="background-color:yellow" %)**ST-LINK v2 GND  <~-~->  LTC2 GND**
1107 )))
1108 * (((
1109 (% style="background-color:yellow" %)**ST-LINK v2 RESET  <~-~->  LTC2 NRST**
1110 )))
1111 * (((
1112 (% style="background-color:yellow" %)**ST-LINK v2 SWCLK  <~-~->  LTC2 SWCLK**
1113 )))
1114 * (((
1115 (% style="background-color:yellow" %)**ST-LINK v2 SWDIO  <~-~->  LTC2 SWDIO**
1116 )))
1117 * (((
1118 (% style="background-color:yellow" %)**LTC2 power must be on.  **
1119 )))
1120
1121 (((
1122
1123
1124 **Firmware Location and Change Log:**
1125 )))
1126
1127 (((
1128 [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LTC2/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LTC2/Firmware/]]
1129 )))
1130
1131
1132
1133 = 6.  FAQ =
1134
1135 == 6.1  How to use AT Command to configure LTC2 ==
1136
1137 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.
1138
1139
1140 **Connection:**
1141
1142 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->  LTC2 GND**
1143 * (% style="background-color:yellow" %)**USB to TTL RXD  <~-~->  LTC2 TXD**
1144 * (% style="background-color:yellow" %)**USB to TTL TXD  <~-~->  LTC2 RXD**
1145
1146 (((
1147 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.
1148 )))
1149
1150 (((
1151
1152 )))
1153
1154 (((
1155 Input password and ATZ to activate LTC2,As shown below:
1156 )))
1157
1158 [[image:image-20220620151601-13.png||height="454" width="1204"]]
1159
1160
1161
1162 == 6.2  How to connect a customized PT100 cable? ==
1163
1164 (((
1165 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. 
1166 )))
1167
1168 (((
1169
1170 )))
1171
1172 (((
1173 (% 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.
1174 )))
1175
1176 [[image:image-20220620152115-14.jpeg||height="548" width="763"]]
1177
1178 We know that the Multimeter has a shortcut resistance 0.002 ohm.
1179
1180
1181 (% style="color:blue" %)**Step 2**(%%): Measure the resistance between the two shorted wires of PT100 Probe.
1182
1183 [[image:image-20220620152115-15.jpeg||height="791" width="704"]]
1184
1185 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) .
1186
1187
1188 (% style="color:blue" %)**Step 3**(%%): Run Calibrate Command.
1189
1190 Run this command to both channels to use 0.296R calibrate resistance.
1191
1192 **AT+RCABLE=296,0**   ~-~->  Calibrate Channel 1 with 0.296R
1193
1194
1195 Or use LoRaWAN downlink command (0xA8 Code) to set:
1196
1197 0xA801280000
1198
1199
1200 User can use 0xA9 downlink command to poll the current calibration value.
1201
1202
1203 (% style="color:blue" %)**Step 4**(%%)**: **Connect the PT100 to LTC2
1204
1205 [[image:image-20220620152115-16.png]]
1206
1207 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.
1208
1209
1210 == 6.3  What is the frequency range of LTC2 LoRa part? ==
1211
1212 Different LTC2 version supports different frequency range, below is the table for the working frequency and recommend bands for each model:
1213
1214 [[image:image-20220620151440-12.png]]
1215
1216
1217
1218 == 6.4  How to change the LoRa Frequency Bands/Region ==
1219
1220 You can follow the instructions for [[how to upgrade image>>||anchor="H5.A0FirmwareChangeLogandUploadFirmware"]].
1221 When downloading the images, choose the required image file for download. ​
1222
1223
1224 = 7.  Trouble Shooting =
1225
1226 == 7.1  AT Command input doesn't work ==
1227
1228 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.
1229
1230
1231 = 8.  Order Info =
1232
1233 Part Number **:** (% style="color:blue" %)**LTC2-XX-YYY**
1234
1235 (% style="color:#0000ff" %)**XX**(%%)**: **Probe Version
1236
1237 * (% style="color:red" %)**SI**(%%):  Standard IP68 probe x 1
1238 * (% style="color:red" %)**LT**(%%):  Low Temperature probe x 1
1239 * (% style="color:red" %)**HT**(%%): High Temperature probe x 1
1240 * (% style="color:red" %)**FS**(%%):  Food Safety probe x 1
1241 * (% style="color:red" %)**FT**(%%):  Flat Type probe x 1
1242 * (% style="color:red" %)**NA**(%%): No probe
1243
1244 (% style="color:#0000ff" %)**YYY**(%%)**: **The default frequency band
1245
1246 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1247 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1248 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1249 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1250 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1251 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1252 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1253 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1254
1255
1256
1257 = 9. ​ Packing Info =
1258
1259
1260 **Package Includes**:
1261
1262 * LTC2 LoRaWAN Temperature Transmitter x 1
1263
1264 **Dimension and weight**:
1265
1266 * Device Size: cm
1267 * Device Weight: g
1268 * Package Size / pcs : cm
1269 * Weight / pcs : g
1270
1271
1272
1273 = 10.  ​Support =
1274
1275 * 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.
1276 * 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]].

Applications

Navigation

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