Version 275.4 by Xiaoling on 2022/06/20 15:19
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 (% aria-label="macro:toc widget" contenteditable="false" role="region" tabindex="-1" %)
13 (((
14 (% 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"]]
15 )))
16
17
18
19
20
21
22
23
24
25 = 1.  Introduction =
26
27 == 1.1 ​ What is LTC2 LoRaWAN Temperature Transmitter ==
28
29 (((
30
31
32 (((
33 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.
34
35
36 LTC2 supports (% style="color:#4472c4" %)**Datalog feature**(%%). User can retrieve the sensor value via LoRaWAN downlink command.
37
38
39 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.
40
41
42 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.
43
44
45 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.
46
47
48 [[image:image-20220617164020-3.png||height="450" width="1084"]]
49 )))
50
51
52 )))
53
54
55 == ​1.2  Features ==
56
57
58 * LoRaWAN v1.0.3 Class A
59 * max: 2 x monitor temperature channels
60 * Support 3 -wire PT-100
61 * 8500mAh Li-SOCI2 Battery
62 * Firmware upgrade via console
63 * Wall Mountable
64 * Configurable via LoRa or UART
65 * Datalog and retrieve via LoRaWAN
66 * Use pre-load PT100 probe or 3rd PT100 probe
67 * Factory calibration for different resistance range
68 * Support accuracy measure of resistance and upload
69 * Battery Monitoring and upload
70
71 (% style="display:none" %) ** **
72
73
74
75 == 1.3 ​ Applications ==
76
77 * Logistics and Supply Chain Management
78 * Food management
79 * Cold chains solution
80 * Industrial Monitoring and Control
81
82 == 1.4 Hardware Change log ==
83
84 LTC2 v1.0: Release.
85
86
87 == 1.5  Pin Definitions and Switch ==
88
89 (% 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:1655456444657-750.png]](% title="Click and drag to resize" %)​
90
91 === (% 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" %)​(%%)​ ===
92
93 Put a jumper on JP2 will power on the LTC2.
94
95
96 === 1.5.2  LED ===
97
98 The LED will flash in below case.
99
100 1. Send an uplink packet
101
102 === 1.5.3  PT100 Interfaces ===
103
104 There are two independent channels to connect 2 x PT100 probes.
105
106 Each channel has 3-wire connection for 3-wire PT100 probes.
107
108
109 === 1.5.4  Reset Button ===
110
111 Press this button will reboot the LTC2
112
113
114 === 1.6  Probe Variant ===
115
116 LTC2 provide default probe version. See below for the variant:
117
118 (% style="background-color:#f7faff; width:505px" %)
119 |=(% style="width: 70px;" %)**Model**|=(% style="width: 162px;" %)**Photo**|=(% style="width: 314px;" %)**Description**
120 |(% style="width:70px" %)LTC2-SI|(% style="width:162px" %)[[image:1655458404877-785.png]]|(% style="width:314px" %)(((
121 Standard IP68 Probe Version
122
123 * LTC2 with 1 x Standard IP68 PT100 probe.
124 * Installation: Insert
125 * Cable Length : 2m
126 * PT100 Class : Class A
127 * Probe Dimension: 4*30mm
128 * Measure Range: -50 ~~ 200 °C
129 * Suitable Environment: General environment
130 )))
131 |(% style="width:70px" %)LTC2-LT|(% style="width:162px" %)[[image:image-20220617172838-2.png]]|(% style="width:314px" %)(((
132 Low Temperature Version
133
134 * LTC2 with 1 x Low Temperature PT100 probe.
135 * Installation: Insert
136 * Cable Length : 2m
137 * PT100 Class : Class A
138 * Probe Dimension: 4*30mm
139 * Measure Range: -196 ~~ 150 °C
140 * Suitable Environment: Low temperature measurement, such as COVID vaccine transport
141 )))
142 |(% style="width:70px" %)LTC2-FS|(% style="width:162px" %)[[image:image-20220617172838-3.png]]|(% style="width:314px" %)(((
143 Food Safety Version
144
145 * LTC2 with 1 x Food Safety PT100 probe.
146 * Installation: Insert
147 * Cable Length : 2m
148 * PT100 Class : Class A
149 * Probe Dimension: 4*150mm
150 * Measure Range: -50 ~~ 200 °C
151 * Suitable Environment: Food temperature measurement
152 )))
153 |(% style="width:70px" %)LTC2-FT|(% style="width:162px" %)[[image:image-20220617172838-4.png]]|(% style="width:314px" %)(((
154 Flat Type Version
155
156 * LTC2 with 1 x Flat Type PT100 probe.
157 * Installation: Attached
158 * Cable Length : 2m
159 * PT100 Class : Class A
160 * Probe Dimension: 8*25mm
161 * Measure Range: -50 ~~ 200 °C
162 * Suitable Environment: Attached to the measure point.
163 )))
164 |(% style="width:70px" %)LTC2-HT|(% style="width:162px" %)[[image:image-20220617172838-5.png]]|(% style="width:314px" %)(((
165 High Temperature Version
166
167 * LTC2 with 1 x high temperature PT100 probe.
168 * Installation: Insert
169 * Cable Length : 3m
170 * PT100 Class : Class A
171 * Probe Dimension: 4*30mm
172 * Measure Range: -70 ~~ 550 °C
173
174 Suitable Environment: High Temperature
175 )))
176 |(% style="width:70px" %)LTC2-NA|(% style="width:162px" %)[[image:image-20220617172838-6.png]]|(% style="width:314px" %)(((
177 No Probe version:
178
179 * User can connect to their own PT100 Probe
180 * Grand Hole: M12
181 * Suitable Environment:
182
183 Connect to customized probe
184 )))
185
186 = 2.  How to use LTC2? =
187
188 == 2.1  Connect to PT100 sensors ==
189
190 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" %)^^rd^^ PARTY PT100 probe>>path:#Customized_PT100]](%%).
191
192
193 === 2.2  How it works? ===
194
195 (((
196 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**.
197
198 On each uplink, LTC2 will check its two ADC Interfaces and get the temperature from the sensor and send out to server.
199 )))
200
201
202
203 == 2.3  ​Quick guide to connect to LoRaWAN server (OTAA) ==
204
205 (((
206 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.
207
208 (% 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]]
209 )))
210
211 (% 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" %)​(%%)​
212
213 (((
214
215
216 === 2.3.1 Step 1: Create a device in TTN with the OTAA keys from LTC2 ===
217
218
219
220 Below is TTN screen shot:
221
222 * Create Application first.
223 * Manually Add a LoRaWAN End Device device. Choose **OTAA** and **MAC v1.0.3**
224
225 [[image:1655690861020-685.png]]
226
227
228 [[image:1655690877643-259.png]]
229
230
231 Input the OTAA keys for LTC2.
232
233 Each LTC2 is shipped with a sticker with the default device EUI as below:
234
235 (% aria-label="image-20220607170145-1.jpeg image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220607170145-1.jpeg||data-widget="image"]]
236
237
238 * **Input these keys to device portal.**
239
240 [[image:image-20220620100853-1.png]]
241
242
243
244 * **Choose the Frequency band for this end node.**
245
246 [[image:image-20220620100853-2.png]]
247
248
249 * **Input APP Key in this page as well. **
250
251 [[image:image-20220620100853-3.png]]
252
253
254
255 Add payload formatter So TTNv3 knows how to parse the LTC2 upload value.
256
257
258 The payload for TTN can be found at below link:
259
260 https:~/~/www.dragino.com/downloads/downloads/LoRa_End_Node/LTC2/Decoder/
261
262 [[image:image-20220620100853-4.png]]
263
264
265
266
267 === 2.3.2  Step 2: Power on LTC2 ===
268
269
270 LTC2 is power off when ship from factory.
271
272 Put a Jumper on JP2 to power on the device.
273
274
275 [[image:1655691076464-442.png]]
276
277
278
279 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.
280
281 Below is an example uplink message which shows the LTC2 is sending Join Request to TTNv3.
282
283
284 [[image:1655691086647-147.png]]
285
286
287 After join successful, LTC2 will send uplink message with the sensor value.
288
289 [[image:1655691100066-163.png]]
290
291 Above value shows Channel1 detect 25.94 degree. There is no PT100 connected on Channel 2, so it shows -327.67.
292
293
294 )))
295
296
297 == 2.4  ​Uplink Payload ==
298
299 (((
300 (((
301 (((
302 Below is the uplink payload which shows
303 )))
304 )))
305 )))
306
307 (((
308
309 )))
310
311 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
312 |=(% style="width: 62.5px;" %)(((
313 **Size (bytes)**
314 )))|=(% style="width: 62.5px;" %)**2**|=**1**|=2|=2|=**4**
315 |(% style="width:62.5px" %)**Value**|(((
316 [[BAT>>||anchor="H2.4.1A0BatteryInfo"]]
317
318
319 )))|(((
320 [[Status & EXT>>||anchor="H"]]
321 )))|(((
322 [[Channel 1 data>>||anchor="H"]]
323 )))|(((
324 [[Channel 2 data>>||anchor="H"]]
325 )))|(((
326 [[Unix TimeStamp>>||anchor="H"]]
327 )))
328
329 (% 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"]]
330
331
332 (((
333 === (% style="color:blue" %)**BAT**(%%) ===
334
335 (% class="wikigeneratedid" %)
336 Ex1: 0x0E3C ⇒ 3644 (mV) = 3.644 V
337
338 (% class="wikigeneratedid" %)
339
340 )))
341
342 (((
343 === (% style="color:blue" %)**Status & EXT**(%%) ===
344 )))
345
346 [[image:image-20220620103724-6.png]]
347
348 * (% style="color:#037691" %)**Poll Message Flag**(%%):  1: This message is a poll message reply, 0: means this is a normal uplink.
349 * (% 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.
350 * (% 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)
351 * (% style="color:#037691" %)**EXT**(%%):  The decode method for Channel 1 data and Channel 2 data
352 ** 0b(0001): Upload PT100 temperature, with 2 decimals, range:  **-327.67 ~~ 327.67 ℃**
353 ** 0b(0010): Upload PT100 temperature, with 1 decimals, range: ** -3276.7 ~~ 3276.7 ℃**
354 ** 0b(0011): Upload Resistance instead of Temperature, range:  **-327.67~~ 327.67 ohm**
355
356 (((
357 (% class="wikigeneratedid" %)
358
359
360
361 === (% style="color:blue" %)**Channel1 data and Channel 2 data**(%%) ===
362 )))
363
364 (((
365 (% class="wikigeneratedid" %)
366 [[image:image-20220620103651-5.png]]
367
368
369 === (% style="color:blue" %)**Unix TimeStamp**(%%) ===
370 )))
371
372 Refer to Datalog feature.
373
374 (% style="color:#037691" %)**Example Uplink Payload**:
375
376 **Uplink payload example 1:**  0CE9011422EC2D6073E83B
377
378 * Bat voltage:0x0CE9 =3305mV
379 * Ext=0x01
380 * Channel1 temp=0x1422/100=51.54 ℃
381 * Channel2 temp=(0xEC2D-65536)/100=-50.75 ℃
382 * System timestamp=0x6073E83B= 1618208827(UTC)
383
384 **Uplink payload example 2: ** 0CED020203FE056073E697
385
386 * Bat voltage:0x0CED =3309mV
387 * Ext=0x02
388 * Channel1 temp=0x0203/10=515.4 ℃
389 * Channel2 temp=(0xFE05-65536)/10=-507.5 ℃
390 * System timestamp=0x6073E697=1618208407(UTC)
391
392 **Uplink payload example 3 :**  0CE9032EDE1F406073E967
393
394 * Bat voltage:0x0CE9 =3305mV
395 * Ext=0x03
396 * Channel1 res=0x2EDE/100=119.98 ohm
397 * Channel2 res=0x1F40/100=80.00 ohm
398 * System timestamp=0x6073E967= 1618209127(UTC)
399
400 (% 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" %)​(%%)​
401
402
403
404 == 2.5  Datalog Feature ==
405
406 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.
407
408
409 === 2.5.1  Unix TimeStamp ===
410
411
412 LTC2 uses Unix TimeStamp format based on
413
414 [[image:1655694312268-590.png]]
415
416 Users can get this time from the link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
417
418 Below is the converter example
419
420 [[image:1655694332878-202.png]]
421
422 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set current time 2021 – Jan ~-~- 29 Friday 03:03:25
423
424
425 === 2.5.2  Set Device Time ===
426
427 (((
428 (((
429 There are two ways to set the device's time:
430 )))
431 )))
432
433 (((
434 (((
435 (% style="color:#4f81bd" %)**1. Through LoRaWAN MAC Command (Default settings)**
436 )))
437 )))
438
439 (((
440 (((
441 Users need to set SYNCMOD=1 to enable sync time via the MAC command.
442 )))
443 )))
444
445 (((
446 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).
447
448
449 )))
450
451 (((
452 (((
453 (% 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.
454
455
456 )))
457
458 (((
459 (% style="color:#4f81bd" %)**2. Manually Set Time**
460 )))
461
462 (((
463 Users need to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
464 )))
465 )))
466
467
468
469 === 2.5.3  Poll sensor value ===
470
471 Users can poll sensor values based on timestamps. Below is the downlink command.
472
473 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:453.989px" %)
474 |=(% colspan="4" style="width: 451px;" %)**Downlink Command to poll Open/Close status (0x31)**
475 |(% style="width:59px" %)**1byte**|(% style="width:126px" %)**4bytes**|(% style="width:138px" %)**4bytes**|(% style="width:128px" %)**1byte**
476 |(% style="width:59px" %)31|(% style="width:126px" %)Timestamp start|(% style="width:138px" %)Timestamp end|(% style="width:128px" %)Uplink Interval
477
478 (((
479
480 )))
481
482 (((
483 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.
484
485 For example, downlink command[[image:image-20220620111056-7.png]]
486 )))
487
488 (((
489 Is to check 2021/5/16 01:00:00 to 2021/5/16 02:00:00's data
490
491 Uplink Internal =10s，means LTC2 will send one packet every 10s. range 5~~255s.
492 )))
493
494
495
496 === 2.5.4  Datalog Uplink payload ===
497
498 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>>path:#uplink_paylpad]].
499
500
501 **Note:**
502
503 * Poll Message Flag is set to 1.
504 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
505
506 For example, in US915 band, the max payload for different DR is:
507
508 a)      DR0: max is 11 bytes so one entry of data
509
510 b)      DR1: max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
511
512 c)      DR2: total payload includes 11 entries of data
513
514 d)  DR3: total payload includes 22 entries of data.
515
516 If devise doesn’t have any data in the polling time. Device will uplink 11 bytes of 0   
517
518
519 **Example:**
520
521 If LTC2 has below data inside Flash:
522
523 [[image:image-20220620134635-9.png]]
524
525
526 If user send below downlink command:
527
528 **3160A06E9060A098C00A**
529
530 Where : Start time: 60A06E90 = time 21/5/16 01:00:00
531
532 Stop time: 60A098C0 = time 21/5/16 04:00:00
533
534
535 LTC2 will uplink this payload.
536
537
538 [[image:image-20220620111850-8.png]]
539
540 (% style="color:red" %)**0E64410B49800160A072B8**(%%)0E61410B3F800160A077680E61410B33800160A07C180E64410B2C800160A080C80E64410B28800160A085780E64410B24800160A08A280E64410B23800160A08ED80E64410B22800160A09388(% style="color:red" %)**0E64410B1E800160A09838**
541
542
543 Where the first 11 bytes is for the first entry:
544
545 (% style="color:red" %)**0E64410B49800160A072B8**
546
547 Bat voltage:0x0E64 =3684mV
548
549
550 poll message flag & Ext=0x41,means reply data,Ext=1
551
552 Channel1 temp=0x0B49/100=28.89℃
553
554 Channel2 temp=0x8001/100=-327.67℃
555
556 System timestamp=0x60A072B8= 1621127864(UTC)
557
558
559
560 == 2.6  ​Alarm Mode ==
561
562 (((
563 LTC2 can monito the temperature in every CTTEMP time, when the temperature exceed the limit , it will uplink the sensor value immediately.
564
565 Detail commands see:
566
567 [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Enable Alarm Mode.**>>path:#Enable_Alarm]]
568
569 [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Config Alarm Sampling Time.**>>path:#Alarm_Sampling_Time]]
570
571 [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Set Alarm Threshold**>>path:#Alarm_ThresHold]]
572
573
574 )))
575
576
577 = 3.  Configure LTC2 via AT Command or LoRaWAN Downlink =
578
579 (((
580 (((
581 Use can configure LTC2 via AT Command or LoRaWAN Downlink.
582 )))
583 )))
584
585 * (((
586 (((
587 AT Command Connection: See [[FAQ>>||anchor="H6.A0FAQ"]].
588 )))
589 )))
590 * (((
591 (((
592 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
593 )))
594 )))
595
596 (((
597 (((
598
599 )))
600
601 (((
602 There are two kinds of commands to configure LTC2, they are:
603 )))
604 )))
605
606 * (((
607 (((
608 (% style="color:#4f81bd" %)** General Commands**.
609 )))
610 )))
611
612 (((
613 (((
614 These commands are to configure:
615 )))
616 )))
617
618 * (((
619 (((
620 General system settings like: uplink interval.
621 )))
622 )))
623 * (((
624 (((
625 LoRaWAN protocol & radio related command.
626 )))
627 )))
628
629 (((
630 (((
631 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]]
632 )))
633 )))
634
635 (((
636 (((
637
638 )))
639 )))
640
641 * (((
642 (((
643 (% style="color:#4f81bd" %)** Commands special design for LTC2**
644 )))
645 )))
646
647 (((
648 (((
649 These commands only valid for LTC2, as below:(% title="Click and drag to resize" %)​
650 )))
651 )))
652
653 (% 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" %)​
654
655
656
657 == 3.1  Set Transmit Interval Time ==
658
659 Feature: Change LoRaWAN End Node Transmit Interval.
660
661 (% style="color:#037691" %)**AT Command: AT+TDC**
662
663 (% 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" %)​(%%)​
664
665
666 (((
667 (% style="color:#037691" %)**Downlink Command: 0x01**
668 )))
669
670 (((
671 (((
672 Format: Command Code (0x01) followed by 3 bytes time value.
673
674 (((
675 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
676 )))
677
678 * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
679 * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
680 )))
681 )))
682
683
684
685
686 == 3.2  Enable PT100 channels ==
687
688 Feature: Enable PT100 channels. Default only Enable Channel 1
689
690 (% style="color:#037691" %)**AT Command: AT+ENPTCHNUM**
691
692 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:494px" %)
693 |=(% style="width: 165px;" %)**Command Example**|=(% style="width: 254px;" %)**Function**|=(% style="width: 73px;" %)**Response**
694 |(% style="width:165px" %)AT+ENPTCHNUM=?|(% style="width:254px" %)Get current ENPTCHNUM settings|(% style="width:73px" %)(((
695 1
696
697
698 OK
699 )))
700 |(% style="width:165px" %)AT+ ENPTCHNUM =1|(% colspan="2" style="width:327px" %)Enable channel 1
701 |(% style="width:165px" %)AT+ ENPTCHNUM =2|(% colspan="2" style="width:327px" %)Enable channel 1 and 2
702
703 (% style="color:#037691" %)**Downlink Command: 0xA1**
704
705 Total bytes: 2 bytes
706
707 Example:
708
709 * 0xA101: same as AT+ENPTCHNUM =1
710 * 0xA102: same as AT+ENPTCHNUM =2
711
712
713 == 3.3  Set External Sensor Mode ==
714
715 (((
716 Feature: Change External Sensor Mode.
717 )))
718
719 (((
720 (% style="color:#037691" %)**Downlink Command: AT+EXT**
721 )))
722
723 (% 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" %)​(%%)​
724
725 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:428px" %)
726 |(% style="width:155px" %)**Command Example**|(% style="width:180px" %)**Function**|(% style="width:90px" %)**Response**
727 |(% style="width:155px" %)AT+EXT=?|(% style="width:180px" %)Get current EXT settings|(% style="width:90px" %)(((
728 1
729
730
731 OK
732 )))
733 |(% style="width:155px" %)AT+EXT=1|(% colspan="2" style="width:270px" %)Set EXT to 0b(0001)
734 |(% style="width:155px" %)AT+EXT=2|(% colspan="2" style="width:270px" %)Set EXT to 0b(0010)
735 |(% style="width:155px" %)AT+EXT=3|(% colspan="2" style="width:270px" %)Set EXT to 0b(0011)
736
737 (% style="color:#037691" %)**Downlink Command: 0xA2**
738
739 Total bytes: 2 bytes
740
741 Example:
742
743 * 0xA201: same as AT+EXT=1
744
745
746 == 3.4 Quit AT Command ==
747
748 Feature: Quit AT Command mode, so user need to input password again before use AT Commands.
749
750 (% style="color:#037691" %)**AT Command: AT+DISAT**
751
752 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:446px" %)
753 |=(% style="width: 161px;" %)**Command Example**|=(% style="width: 193px;" %)**Function**|=(% style="width: 87px;" %)**Response**
754 |(% style="width:161px" %)AT+DISAT|(% style="width:193px" %)Quit AT Commands mode|(% style="width:87px" %)OK
755
756 (% style="color:#037691" %)**Downlink Command:**
757
758 No downlink command for this feature.
759
760
761
762 == 3.5 Set system time ==
763
764 Feature: Set system time, unix format. [[See here for formmat detail.>>path:#TimeStamp]]
765
766 (% style="color:#037691" %)**AT Command:**
767
768 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:506px" %)
769 |=(% style="width: 218px;" %)**Command Example**|=(% style="width: 285px;" %)**Function**
770 |(% style="width:218px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
771 OK
772
773 Set System time to 2021-01-20 00:59:12
774 )))
775
776 (% style="color:#037691" %)**Downlink Command:**
777
778 0x306007806000  ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
779
780
781
782 == 3.6 Set Time Sync Mode ==
783
784 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
785
786
787 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.
788
789
790 (% style="color:#037691" %)**AT Command:**
791
792 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:473px" %)
793 |=(% style="width: 157px;" %)**Command Example**|=(% style="width: 313px;" %)**Function**
794 |(% style="width:157px" %)AT+SYNCMOD=1|(% style="width:313px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
795
796 (% style="color:#037691" %)**Downlink Command:**
797
798 0x28 01 ~/~/ Same As AT+SYNCMOD=1
799
800 0x28 00 ~/~/ Same As AT+SYNCMOD=0
801
802
803
804 == 3.7 Set Time Sync Interval ==
805
806 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
807
808 (% style="color:#037691" %)**AT Command:**
809
810 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:469px" %)
811 |=**Command Example**|=(% style="width: 306px;" %)**Function**
812 |AT+SYNCTDC=0x0A|(% style="width:306px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
813
814 (% style="color:#037691" %)**Downlink Command:**
815
816 0x29 0A ~/~/ Same as AT+SYNCTDC=0x0A
817
818
819
820 == 3.8 Retrieve data ==
821
822 Feature: Retrieval data for specify time slot.
823
824 (% style="color:#037691" %)**AT Command**(%%)**:**
825
826 No AT Command, only valid for downlink command.
827
828
829 (% style="color:#037691" %)**Downlink Command:**
830
831 [[See Poll Sensor Value>>path:#Poll_Sensor]].
832
833
834
835 == 3.9 Enable Alarm mode ==
836
837 Feature: Enable Alarm Mode.
838
839 (% style="color:#037691" %)**AT Command: AT_WMOD**
840
841 Total bytes: 2
842
843 Example:
844
845 0xA500: AT+WMOD=0(default)
846
847 0xA501: AT+WMOD=1(alarm mode)
848
849
850 (% style="color:#037691" %)**Downlink Command:**
851
852 [[See Poll Sensor Value>>path:#Poll_Sensor]].
853
854
855
856 == 3.10 Alarm check time ==
857
858 Feature: The time interval to check sensor value for Alarm.
859
860 (% style="color:#037691" %)**AT Command: AT+CITEMP**
861
862 Total bytes: 3
863
864 Example:
865
866 0xA60001: AT+CITEMP=1(default)
867
868 Set collection interval in 1min,only in alarm mode
869
870
871 (% style="color:#037691" %)**Downlink Command:**
872
873 [[See Poll Sensor Value>>path:#Poll_Sensor]].
874
875
876
877 == 3.11 Set Alarm Threshold ==
878
879 Feature: Set Alarm Threshold.
880
881 (% style="color:#037691" %)**AT Command: AT+ARTEMP**
882
883 Total bytes: 9  Unit: ℃
884
885 Example:
886
887 A7FF380320FF380320
888
889 AT+ARTEMP=-200,800,-200,800
890
891
892 A7000A0064000A0065
893
894 AT+ARTEMP=10,100,10,101
895
896 Channel 1 operating temp:10~~100
897
898 Channel 2 operating temp:10~~101
899
900
901 (% style="color:#037691" %)**Downlink Command:**
902
903 [[See Poll Sensor Value>>path:#Poll_Sensor]].
904
905
906
907 == 3.12 Set Calibrate Value ==
908
909 Feature: Set Calibrate value for PT100 cable.  Detail of use of this command please see [[connect to a customized PT100 Probe>>path:#Customized_PT100]].
910
911 (% style="color:#037691" %)**AT Command: AT+RCABLE**
912
913 Total bytes: 5
914
915 Example:
916
917 AT+RCABLE=296,300
918
919 Channel 1 rcable=0x0128/1000=0.296R
920
921 Channel 2 rcable=0x012C/1000=0.300R
922
923
924 (% style="color:#037691" %)**Downlink Command:**
925
926 0xA80128012C  ~-~->  Same as AT+RCABLE=296,300
927
928
929
930 == 3.13 Poll Calibrate Value ==
931
932 Feature: Poll Calibrate value. LTC2 will reply with this command send an uplink to server.
933
934 (% style="color:#037691" %)**AT Command: No AT Command.**
935
936
937 (% style="color:#037691" %)**Downlink Command:**
938
939 Example: A901
940
941 End nodes will send racable config to server
942
943 Like uplink payload: 010128012C
944
945
946
947 == 3.14 Print data entries base on page ==
948
949 Feature: Print the sector data from start page to stop page (max is 400 pages).
950
951 (% style="color:#037691" %)**AT Command: AT+PDTA**
952
953 [[image:image-20220620145822-10.png]]
954
955
956 (% style="color:#037691" %)**Downlink Command:**
957
958 No downlink commands for feature
959
960
961
962 == 3.15 Print last few data entries ==
963
964 Feature: Print the last few data entries
965
966 (% style="color:#037691" %)**AT Command: AT+PLDTA**
967
968 [[image:image-20220620145916-11.png]]
969
970
971 (% style="color:#037691" %)**Downlink Command:**
972
973 No downlink commands for feature
974
975
976
977 == 3.16 Clear Flash Record ==
978
979 Feature: Clear flash storage for data log feature.
980
981 (% style="color:#037691" %)**AT Command: AT+CLRDTA**
982
983 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:511px" %)
984 |=(% style="width: 157px;" %)**Command Example**|=(% style="width: 136px;" %)**Function**|=(% style="width: 213px;" %)**Response**
985 |(% style="width:157px" %)AT+CLRDTA|(% style="width:136px" %)Clear date record|(% style="width:213px" %)(((
986 Clear all stored sensor data…
987
988 OK
989 )))
990
991 (% style="color:#037691" %)**Downlink Command: 0xA3**
992
993 * Example: 0xA301 ~/~/Same as AT+CLRDTA
994
995
996
997
998 = 4.  Battery & How to replace =
999
1000 == 4.1  Battery Type ==
1001
1002 (((
1003 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.
1004 )))
1005
1006 (((
1007 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1008 )))
1009
1010 (% 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" %)​(%%)​
1011
1012
1013 Minimum Working Voltage for the LTC2:
1014
1015 LTC2:  3.0v ~~ 3.6v
1016
1017
1018
1019 == 4.2  Replace Battery ==
1020
1021 (((
1022
1023
1024 Any battery with 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
1025 )))
1026
1027 (((
1028 And make sure the positive and negative pins match.
1029 )))
1030
1031
1032
1033 == 4.3  Power Consumption Analyze ==
1034
1035 (((
1036 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.
1037 )))
1038
1039 (((
1040 Instruction to use as below:
1041 )))
1042
1043
1044 **Step 1 :**  Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
1045
1046 [[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/]]
1047
1048
1049 **Step 2 :**  Open it and choose
1050
1051 * Product Model
1052 * Uplink Interval
1053 * Working Mode
1054
1055 And the Life expectation in difference case will be shown on the right.
1056
1057 (% 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" %)​(%%)​
1058
1059
1060
1061 = 5.  Firmware Change Log and Upload Firmware =
1062
1063
1064 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:
1065
1066
1067 **Connection:**
1068
1069 * (% style="background-color:yellow" %)**ST-LINK v2 GND  <~-~->  LTC2 GND**
1070 * (% style="background-color:yellow" %)**ST-LINK v2 RESET  <~-~->  LTC2 NRST**
1071 * (% style="background-color:yellow" %)**ST-LINK v2 SWCLK  <~-~->  LTC2 SWCLK**
1072 * (% style="background-color:yellow" %)**ST-LINK v2 SWDIO  <~-~->  LTC2 SWDIO**
1073 * (% style="background-color:yellow" %)**LTC2 power must be on.  **
1074
1075
1076 **Firmware Location and Change Log:**
1077
1078 [[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/]]
1079
1080
1081
1082 = 6.  FAQ =
1083
1084 == 6.1  How to use AT Command to configure LTC2 ==
1085
1086 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.
1087
1088
1089 **Connection:**
1090
1091 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->  LTC2 GND**
1092 * (% style="background-color:yellow" %)**USB to TTL RXD  <~-~->  LTC2 TXD**
1093 * (% style="background-color:yellow" %)**USB to TTL TXD  <~-~->  LTC2 RXD**
1094
1095 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
1096 (% 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:
1097 (% 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.
1098
1099
1100 Input password and ATZ to activate LTC2,As shown below:
1101
1102
1103 [[image:image-20220620151601-13.png]]
1104
1105
1106
1107
1108 == 6.2 ==
1109
1110
1111
1112
1113
1114
1115 == 6.3  What is the frequency range of LTC2 LoRa part? ==
1116
1117 Different LTC2 version supports different frequency range, below is the table for the working frequency and recommend bands for each model:
1118
1119 [[image:image-20220620151440-12.png]]
1120
1121
1122
1123 == 6.4  How to change the LoRa Frequency Bands/Region ==
1124
1125 You can follow the instructions for [[how to upgrade image>>||anchor="H2.9A0200BFirmwareChangeLog"]].
1126 When downloading the images, choose the required image file for download. ​
1127
1128
1129
1130 = 7.  Trouble Shooting =
1131
1132 == 7.1  AT Command input doesn't work ==
1133
1134 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.
1135
1136 (((
1137
1138 )))
1139
1140
1141 = 8.  Order Info =
1142
1143 == 8.1  Main Device LDDS04 ==
1144
1145 Part Number **:** (% style="color:blue" %)**LDDS04-XX**
1146
1147
1148 (% style="color:blue" %)**XX**(%%)**: **The default frequency band
1149
1150 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1151 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1152 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1153 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1154 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1155 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1156 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1157 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1158
1159 == 8.2  Probe Model ==
1160
1161 Detail See [[Probe Option>>path:#Probe_Option]] Section
1162
1163 * A01A-15
1164 * A02-15
1165 * A13-15
1166 * A16-15
1167
1168 = 9. ​ Packing Info =
1169
1170
1171 **Package Includes**:
1172
1173 * LDDS04 LoRaWAN 4-Channels Distance Sensor x 1
1174
1175 **Dimension and weight**:
1176
1177 * Device Size: cm
1178 * Device Weight: g
1179 * Package Size / pcs : cm
1180 * Weight / pcs : g
1181
1182 = 10.  ​Support =
1183
1184 * 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.
1185 * 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