Last modified by Xiaoling on 2025/04/24 15:53
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3 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]
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6 (% style="text-align:center" %)
7 [[image:image-20220617163631-2.jpeg||height="704" width="617"]]
8
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10 **Table of Contents:**
11
12 {{toc/}}
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16 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]
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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 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.
41 )))
42
43 (((
44 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.
45 )))
46
47 (((
48 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.
49 )))
50
51
52 [[image:image-20220617164020-3.png||height="314" width="756"]]
53 )))
54 )))
55
56
57 == ​1.2  Features ==
58
59
60 * LoRaWAN v1.0.3 Class A
61 * max: 2 x monitor temperature channels
62 * Support 3 -wire PT-100
63 * 8500mAh Li-SOCI2 Battery
64 * Firmware upgrade via console
65 * Wall Mountable
66 * Configurable via LoRa or UART
67 * Use pre-load PT100 probe or 3rd PT100 probe
68 * Factory calibration for different resistance range
69 * Support accuracy measure of resistance and upload
70 * Battery Monitoring and upload
71 * Operation Temperature: -40 ~~ 65 ℃
72
73 (% style="display:none" %) ** **
74
75
76 == 1.3 ​ Applications ==
77
78
79 * Logistics and Supply Chain Management
80 * Food management
81 * Cold chains solution
82 * Industrial Monitoring and Control
83
84 == 1.4 Hardware Change log ==
85
86
87 LTC2 v1.0: Release.
88
89
90 == 1.5  Pin Definitions and Switch ==
91
92 === (% title="Click and drag to resize" %)1.5.1  J(%%)umper JP2 ( Power ON) ===
93
94 (% class="wikigeneratedid" id="H200B200B200B200B" %)
95 (% 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" %)​(%%)​
96
97 Put a jumper on JP2 will power on the LTC2.
98
99
100 === 1.5.2  LED ===
101
102
103 The LED will flash in below case.
104
105 (((
106 1.  Send an uplink packet
107
108
109 )))
110
111 === 1.5.3  PT100 Interfaces ===
112
113
114 (((
115 There are two independent channels to connect 2 x PT100 probes.
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117
118 (((
119 Each channel has 3-wire connection for 3-wire PT100 probes.
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121
122
123 === 1.5.4  Reset Button ===
124
125
126 Press this button will reboot the LTC2
127
128
129 == 1.6  Probe Variant ==
130
131
132 LTC2 provide default probe version. See below for the variant:
133
134
135 (% border="1" cellspacing="4" style="width:505px" %)
136 |=(% style="width: 78px;background-color:#4F81BD;color:white" %)(((
137 **Model**
138 )))|=(% style="width: 127px;background-color:#4F81BD;color:white" %)(((
139 **Photo**
140 )))|=(% style="width: 300px;background-color:#4F81BD;color:white" %)(((
141 **Description**
142 )))
143 |(% style="width:78px" %)(((
144 LTC2-SI
145 )))|(% style="width:117px" %)(((
146 (% style="text-align:center" %)
147 [[image:1655458404877-785.png]]
148 )))|(% style="width:314px" %)(((
149 Standard IP68 Probe Version
150
151 * (((
152 LTC2 with 1 x Standard IP68 PT100 probe.
153 )))
154 * (((
155 Installation: Insert
156 )))
157 * (((
158 Cable Length : 2m
159 )))
160 * (((
161 PT100 Class : Class A
162 )))
163 * (((
164 Probe Dimension: 4*30mm
165 )))
166 * (((
167 Measure Range: -50 ~~ 200 °C
168 )))
169 * (((
170 Suitable Environment: General environment
171 )))
172 )))
173 |(% style="width:78px" %)(((
174 LTC2-LT
175 )))|(% style="width:117px" %)(((
176 (% style="text-align:center" %)
177 [[image:image-20220617172838-2.png]]
178 )))|(% style="width:314px" %)(((
179 Low Temperature Version
180
181 * (((
182 LTC2 with 1 x Low Temperature PT100 probe.
183 )))
184 * (((
185 Installation: Insert
186 )))
187 * (((
188 Cable Length : 2m
189 )))
190 * (((
191 PT100 Class : Class A
192 )))
193 * (((
194 Probe Dimension: 4*30mm
195 )))
196 * (((
197 Measure Range: -196 ~~ 150 °C
198 )))
199 * (((
200 Suitable Environment: Low temperature measurement, such as COVID vaccine transport
201 )))
202 )))
203 |(% style="width:78px" %)(((
204 LTC2-FS
205 )))|(% style="width:117px" %)(((
206 (% style="text-align:center" %)
207 [[image:image-20220617172838-3.png]]
208 )))|(% style="width:314px" %)(((
209 Food Safety Version
210
211 * (((
212 LTC2 with 1 x Food Safety PT100 probe.
213 )))
214 * (((
215 Installation: Insert
216 )))
217 * (((
218 Cable Length : 2m
219 )))
220 * (((
221 PT100 Class : Class A
222 )))
223 * (((
224 Probe Dimension: 4*150mm
225 )))
226 * (((
227 Measure Range: -50 ~~ 200 °C
228 )))
229 * (((
230 Suitable Environment: Food temperature measurement
231 )))
232 )))
233 |(% style="width:78px" %)LTC-FSA|(% style="width:117px" %)(((
234 (% style="text-align:center" %)
235 [[image:image-20221222182717-1.jpeg]]
236 )))|(% style="width:314px" %)(((
237 Food Safety Version
238
239 * (((
240 LTC2 with 1 x Food Safety PT100 probe.
241 )))
242 * (((
243 Installation: Insert
244 )))
245 * (((
246 Cable Length : 2m
247 )))
248 * (((
249 PT100 Class : Class A
250 )))
251 * (((
252 Probe Dimension: 4*150mm
253 )))
254 * (((
255 Measure Range: -50 ~~ 200 °C
256 )))
257 * (((
258 Suitable Environment: Food temperature measurement
259 )))
260 )))
261 |(% style="width:78px" %)(((
262 LTC2-FT
263 )))|(% style="width:117px" %)(((
264 (% style="text-align:center" %)
265 [[image:image-20220617172838-4.png]]
266 )))|(% style="width:314px" %)(((
267 Flat Type Version
268
269 * LTC2 with 1 x Flat Type PT100 probe.
270 * Installation: Attached
271 * Cable Length : 2m
272 * PT100 Class : Class A
273 * Probe Dimension: 8*25mm
274 * Measure Range: -50 ~~ 200 °C
275 * Suitable Environment: Attached to the measure point.
276 )))
277 |(% style="width:78px" %)LTC2-HT|(% style="width:117px" %)(((
278 (% style="text-align:center" %)
279 [[image:image-20250212084650-1.png||height="112" width="80"]]
280 )))|(% style="width:314px" %)(((
281 High Temperature Version
282
283 * LTC2 with 1 x high temperature PT100 probe.
284 * Installation: Insert
285 * Cable Length : 3m
286 * PT100 Class : Class A
287 * Probe Dimension: 4*30mm
288 * Measure Range: -70 ~~ 450 °C
289
290 Suitable Environment: High Temperature
291 )))
292 |(% style="width:78px" %)LTC2-NA|(% style="width:117px" %)(((
293 (% style="text-align:center" %)
294 [[image:image-20220617172838-6.png]]
295 )))|(% style="width:314px" %)(((
296 No Probe version:
297
298 * User can connect to their own PT100 Probe
299 * Grand Hole: M12
300 * Suitable Environment:
301
302 Connect to customized probe
303 )))
304
305 = 2.  How to use LTC2? =
306
307 == 2.1  Connect to PT100 sensors ==
308
309
310 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"]](%%).
311
312
313 == 2.2  How it works? ==
314
315
316 (((
317 (((
318 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**.
319 )))
320
321 (((
322 On each uplink, LTC2 will check its two ADC Interfaces and get the temperature from the sensor and send out to server.
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324 )))
325
326
327 == 2.3  ​Quick guide to connect to LoRaWAN server (OTAA) ==
328
329
330 (((
331 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.
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333 (% 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||height="311" width="751"]]
334 )))
335
336 (% 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" %)​(%%)​
337
338 (((
339
340
341 (% class="wikigeneratedid" id="H2.3.1Step1:CreateadeviceinTTNwiththeOTAAkeysfromLTC2" %)
342 (% style="color:blue" %) **Step 1: Create a device in TTN with the OTAA keys from LTC2**
343
344 (% class="wikigeneratedid" %)
345 Each LSN50 is shipped with a sticker with the default device EUI as below:
346
347 [[image:image-20230426083905-2.png||height="230" width="496"]]
348
349
350 You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:
351
352 **Create the application.**
353
354 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/SAC01L_LoRaWAN_Temperature%26Humidity_Sensor_User_Manual/WebHome/image-20250423093843-1.png?width=756&height=264&rev=1.1||alt="image-20250423093843-1.png"]]
355
356 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LTC2-LB--LoRaWAN_Temperature_Transmitter_User_Manual/WebHome/image-20240907111305-2.png?width=1000&height=572&rev=1.1||alt="image-20240907111305-2.png"]]
357
358
359 **Add devices to the created Application.**
360
361 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LTC2-LB--LoRaWAN_Temperature_Transmitter_User_Manual/WebHome/image-20240907111659-3.png?width=977&height=185&rev=1.1||alt="image-20240907111659-3.png"]]
362
363 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LTC2-LB--LoRaWAN_Temperature_Transmitter_User_Manual/WebHome/image-20240907111820-5.png?width=975&height=377&rev=1.1||alt="image-20240907111820-5.png"]]
364
365
366 **Enter end device specifics manually.**
367
368 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LTC2-LB--LoRaWAN_Temperature_Transmitter_User_Manual/WebHome/image-20240907112136-6.png?width=697&height=687&rev=1.1||alt="image-20240907112136-6.png"]]
369
370
371 **Add DevEUI and AppKey.**
372
373 **Customize a platform ID for the device.**
374
375 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LTC2-LB--LoRaWAN_Temperature_Transmitter_User_Manual/WebHome/image-20240907112427-7.png?rev=1.1||alt="image-20240907112427-7.png"]]
376
377
378 (% style="color:blue" %) **Step 2: Add decoder.**
379
380 In TTN, user can add a custom payload so it shows friendly reading.
381
382 Click this link to get the decoder: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder/tree/main/>>url:https://github.com/dragino/dragino-end-node-decoder/tree/main/]]
383
384 Below is TTN screen shot:
385
386 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDS25-LBLDS25-LS--LoRaWAN_LiDAR_Distance_Auto-Clean_Sensor_User_Manual/WebHome/image-20241009140556-1.png?width=1184&height=488&rev=1.1||alt="image-20241009140556-1.png" height="488" width="1184"]]
387
388 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDS25-LBLDS25-LS--LoRaWAN_LiDAR_Distance_Auto-Clean_Sensor_User_Manual/WebHome/image-20241009140603-2.png?width=1168&height=562&rev=1.1||alt="image-20241009140603-2.png"]]
389
390
391 (% style="color:blue" %) **Step 3: Power on LTC2**
392
393 LTC2 is power off when ship from factory.
394
395 Put a Jumper on JP2 to power on the device.
396
397
398 [[image:1655691076464-442.png]]
399
400
401 (((
402 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.
403 )))
404
405 (((
406 Below is an example uplink message which shows the LTC2 is sending Join Request to TTNv3.
407 )))
408
409
410 [[image:1655691086647-147.png]]
411
412
413 After join successful, LTC2 will send uplink message with the sensor value.
414
415 [[image:1655691100066-163.png]]
416
417 Above value shows Channel1 detect 25.94 degree. There is no PT100 connected on Channel 2, so it shows -327.67.
418 )))
419
420
421 == 2.4  ​Uplink Payload ==
422
423
424 Below is the uplink payload which shows.
425
426 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:390px" %)
427 |=(% style="width: 70px;background-color:#4F81BD;color:white" %)(((
428 **Size(bytes)**
429 )))|=(% style="width: 40px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)2|=(% style="width: 70px;background-color:#4F81BD;color:white" %)2|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**4**
430 |(% style="width:62.5px" %)Value|(((
431 [[BAT>>||anchor="HBAT"]]
432 )))|(((
433 [[Status & EXT>>||anchor="HStatus26EXT"]]
434 )))|(((
435 [[Channel 1 data>>||anchor="HChannel1dataandChannel2data"]]
436 )))|(((
437 [[Channel 2 data>>||anchor="HChannel1dataandChannel2data"]]
438 )))|(((
439 [[Unix TimeStamp>>||anchor="HUnixTimeStamp"]]
440 )))
441
442 (% 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"]]
443
444
445 (((
446 === (% style="color:blue" %)**BAT**(%%) ===
447
448
449 Ex1: 0x0E3C ⇒ 3644 (mV) = 3.644 V
450
451 (% class="wikigeneratedid" %)
452
453 )))
454
455 (((
456 === (% style="color:blue" %)**Status & EXT**(%%) ===
457 )))
458
459 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
460 |(% style="background-color:#4f81bd; color:white; width:60px" %)**Bits**|(% style="background-color:#4f81bd; color:white; width:90px" %)**7**|(% style="background-color:#4f81bd; color:white; width:100px" %)**6**|(% style="background-color:#4f81bd; color:white; width:90px" %)**5**|(% style="background-color:#4f81bd; color:white; width:100px" %)**4**|(% style="background-color:#4f81bd; color:white; width:60px" %)**[3:0]**
461 |(% style="width:96px" %)Status&Ext|(% style="width:124px" %)Not Defined|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
462
463 * (% style="color:#037691" %)**Poll Message Flag**(%%):  1: This message is a poll message reply, 0: means this is a normal uplink.
464 * (% 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.
465 * (% 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)
466 * (% style="color:#037691" %)**EXT**(%%):  The decode method for Channel 1 data and Channel 2 data
467 ** 0b(0001): Upload PT100 temperature, with 2 decimals, range:  **-327.67 ~~ 327.67 ℃**
468 ** 0b(0010): Upload PT100 temperature, with 1 decimals, range: ** -3276.7 ~~ 3276.7 ℃**
469 ** 0b(0011): Upload Resistance instead of Temperature, range:  **-327.67~~ 327.67 ohm**
470
471 (((
472 (% class="wikigeneratedid" %)
473
474
475
476 === (% style="color:blue" %)**Channel 1 data and Channel 2 data**(%%) ===
477
478 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:515px" %)
479 |(% style="background-color:#4f81bd; color:white; width:150px" %)**Example Payload on channel 1 or channel 2**|(% style="background-color:#4f81bd; color:white; width:130px" %)**Sensor Value when EXT=0b(0001)**|(% style="background-color:#4f81bd; color:white; width:127.5px" %)**Sensor Value when EXT=0b(0010)**|(% style="background-color:#4f81bd; color:white; width:107.5px" %)**Sensor Value when EXT=0b(0011)**
480 |(% style="width:139px" %)0x1422|(% style="width:142px" %)0x1422/100=51.54℃|(% style="width:155px" %)0x1422/100=515.4℃|(% style="width:148px" %)0x1422/100=51.54Ω
481 |(% style="width:139px" %)OXEC2D|(% style="width:142px" %)(0XEC2D-65536)/100=-50.75℃|(% style="width:155px" %)(0XEC2D-65536)/10=-507.5℃|(% style="width:148px" %)0XEC2D/100=604.61Ω
482 )))
483
484 (((
485 (% class="wikigeneratedid" %)
486
487
488 === (% style="color:blue" %)**Unix TimeStamp**(%%) ===
489 )))
490
491 Refer to Datalog feature.
492
493 (% style="color:#037691" %)**Example Uplink Payload**:
494
495
496 **Uplink payload example 1:**  0CE9011422EC2D6073E83B
497
498 * Bat voltage:0x0CE9 =3305mV
499 * Ext=0x01
500 * Channel1 temp=0x1422/100=51.54 ℃
501 * Channel2 temp=(0xEC2D-65536)/100=-50.75 ℃
502 * System timestamp=0x6073E83B= 1618208827(UTC)
503
504 If payload is: EC2DH : (EC2D & 8000 == 1), temp = (EC2DH - 65536)/100 = -50.75 ℃
505
506 (EC2D & 8000: Judge whether the highest bit is 1, when the highest bit is 1, it is negative)
507
508
509 **Uplink payload example 2: ** 0CED020203FE056073E697
510
511 * Bat voltage:0x0CED =3309mV
512 * Ext=0x02
513 * Channel1 temp=0x0203/10=515.4 ℃
514 * Channel2 temp=(0xFE05-65536)/10=-507.5 ℃
515 * System timestamp=0x6073E697=1618208407(UTC)
516
517 If payload is: FE05H :  (FE05 & 8000 == 1) , temp = (FE05H - 65536)/100 = 507.5 ℃
518
519 (EC2D & 8000: Judge whether the highest bit is 1, when the highest bit is 1, it is negative)
520
521
522 **Uplink payload example 3 :**  0CE9032EDE1F406073E967
523
524 * Bat voltage:0x0CE9 =3305mV
525 * Ext=0x03
526 * Channel1 res=0x2EDE/100=119.98 ohm
527 * Channel2 res=0x1F40/100=80.00 ohm
528 * System timestamp=0x6073E967= 1618209127(UTC)
529
530 (% 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" %)​(%%)​
531
532
533 == 2.5  ​Alarm Mode ==
534
535
536 (((
537 LTC2 can monito the temperature in every CTTEMP time, when the temperature exceed the limit , it will uplink the sensor value immediately.
538
539 Detail commands see:
540
541 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Enable Alarm Mode**>>||anchor="H3.9EnableAlarmmode"]]
542 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Config Alarm Sampling Time**>>||anchor="H3.10Alarmchecktime"]]
543 * [[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)**Set Alarm Threshold**>>||anchor="H3.11SetAlarmThreshold"]]
544
545
546 )))
547
548
549 = 3.  Configure LTC2 via AT Command or LoRaWAN Downlink =
550
551
552 (((
553 (((
554 Use can configure LTC2 via AT Command or LoRaWAN Downlink.
555 )))
556 )))
557
558 * (((
559 (((
560 AT Command Connection: See [[FAQ>>||anchor="H6.A0FAQ"]].
561 )))
562 )))
563 * (((
564 (((
565 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
566 )))
567 )))
568
569 (((
570 (((
571
572 )))
573
574 (((
575 There are two kinds of commands to configure LTC2, they are:
576 )))
577 )))
578
579 * (((
580 (((
581 (% style="color:#4f81bd" %)** General Commands**.
582 )))
583 )))
584
585 (((
586 (((
587 These commands are to configure:
588 )))
589 )))
590
591 * (((
592 (((
593 General system settings like: uplink interval.
594 )))
595 )))
596 * (((
597 (((
598 LoRaWAN protocol & radio related command.
599 )))
600 )))
601
602 (((
603 (((
604 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]]
605 )))
606 )))
607
608 (((
609 (((
610
611 )))
612 )))
613
614 * (((
615 (((
616 (% style="color:#4f81bd" %)** Commands special design for LTC2**
617 )))
618 )))
619
620 (((
621 (((
622 These commands only valid for LTC2, as below:(% title="Click and drag to resize" %)​
623 )))
624 )))
625
626 (% 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" %)​
627
628
629 == 3.1  Set Transmit Interval Time ==
630
631
632 Feature: Change LoRaWAN End Node Transmit Interval.
633
634 (% style="color:#037691" %)**AT Command: AT+TDC**
635
636 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:501px" %)
637 |(% style="background-color:#4f81bd; color:white; width:155px" %)**Command Example**|(% style="background-color:#4f81bd; color:white; width:166px" %)**Function**|(% style="background-color:#4f81bd; color:white; width:180px" %)**Response**
638 |(% style="width:155px" %)AT+TDC=?|(% style="width:162px" %)Show current transmit Interval|(% style="width:177px" %)(((
639 30000
640 OK
641 the interval is 30000ms = 30s
642 )))
643 |(% style="width:155px" %)AT+TDC=60000|(% style="width:162px" %)Set Transmit Interval|(% style="width:177px" %)(((
644 OK
645 Set transmit interval to 60000ms = 60 seconds
646 )))
647
648 (((
649 (% style="color:#037691" %)**Downlink Command: 0x01**
650 )))
651
652 (((
653 (((
654 Format: Command Code (0x01) followed by 3 bytes time value.
655
656 (((
657 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
658 )))
659
660 * Example 1: Downlink Payload: 0100001E  ~/~/  Set Transmit Interval (TDC) = 30 seconds
661 * Example 2: Downlink Payload: 0100003C  ~/~/  Set Transmit Interval (TDC) = 60 seconds
662 )))
663 )))
664
665
666
667 == 3.2  Enable PT100 channels ==
668
669
670 Feature: Enable PT100 channels. Default only Enable Channel 1
671
672 (% style="color:#037691" %)**AT Command: AT+ENPTCHNUM**
673
674 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:494px" %)
675 |=(% style="width: 164px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 254px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 76px;background-color:#4F81BD;color:white" %)**Response**
676 |(% style="width:164px" %)AT+ENPTCHNUM=?|(% style="width:254px" %)Get current ENPTCHNUM settings|(% colspan="1" rowspan="3" style="width:74px" %)(((
677 1
678
679 OK
680 )))
681 |(% style="width:164px" %)AT+ ENPTCHNUM =1|(% colspan="1" style="width:254px" %)Enable channel 1
682 |(% style="width:164px" %)AT+ ENPTCHNUM =2|(% colspan="1" style="width:254px" %)Enable channel 1 and 2
683
684 (% style="color:#037691" %)**Downlink Command: 0xA1**
685
686 Total bytes: 2 bytes
687
688 Example:
689
690 * 0xA101: same as AT+ENPTCHNUM =1
691 * 0xA102: same as AT+ENPTCHNUM =2
692
693 == 3.3  Set External Sensor Mode ==
694
695
696 (((
697 Feature: Change External Sensor Mode.
698 )))
699
700 (((
701 (% style="color:#037691" %)**Downlink Command: AT+EXT**
702 )))
703
704 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:431px" %)
705 |=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 184px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 89px;background-color:#4F81BD;color:white" %)**Response**
706 |(% style="width:155px" %)AT+EXT=?|(% style="width:180px" %)Get current EXT settings|(% colspan="1" rowspan="4" style="width:86px" %)(((
707 1
708 OK
709 )))
710 |(% style="width:155px" %)AT+EXT=1|(% colspan="1" style="width:180px" %)Set EXT to 0b(0001)
711 |(% style="width:155px" %)AT+EXT=2|(% colspan="1" style="width:180px" %)Set EXT to 0b(0010)
712 |(% style="width:155px" %)AT+EXT=3|(% colspan="1" style="width:180px" %)Set EXT to 0b(0011)
713
714 (% style="color:#037691" %)**Downlink Command: 0xA2**
715
716 Total bytes: 2 bytes
717
718 Example:
719
720 * 0xA201: same as AT+EXT=1
721
722 == 3.4 Quit AT Command ==
723
724
725 Feature: Quit AT Command mode, so user need to input password again before use AT Commands.
726
727 (% style="color:#037691" %)**AT Command: AT+DISAT**
728
729 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:446px" %)
730 |=(% style="width: 163px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 195px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 88px;background-color:#4F81BD;color:white" %)**Response**
731 |(% style="width:161px" %)AT+DISAT|(% style="width:193px" %)Quit AT Commands mode|(% style="width:87px" %)OK
732
733 (% style="color:#037691" %)**Downlink Command:**
734
735 No downlink command for this feature.
736
737
738 == 3.5 Set system time ==
739
740
741 Feature: Set system time, unix format. [[See here for formmat detail.>>||anchor="H2.5.1A0UnixTimeStamp"]]
742
743 (% style="color:#037691" %)**AT Command:**
744
745 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:506px" %)
746 |=(% style="width: 219px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 287px;background-color:#4F81BD;color:white" %)**Function**
747 |(% style="width:218px" %)AT+TIMESTAMP=1611104352|(% style="width:285px" %)(((
748 OK
749 Set System time to 2021-01-20 00:59:12
750 )))
751
752 (% style="color:#037691" %)**Downlink Command:**
753
754 0x306007806000  ~/~/ Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
755
756
757 == 3.6 Set Time Sync Mode ==
758
759
760 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
761
762 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.
763
764
765 (% style="color:#037691" %)**AT Command:**
766
767 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:473px" %)
768 |=(% style="width: 159px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 314px;background-color:#4F81BD;color:white" %)**Function**
769 |(% style="width:157px" %)AT+SYNCMOD=1|(% style="width:313px" %)Enable Sync system time via LoRaWAN MAC Command (DeviceTimeReq)
770
771 (% style="color:#037691" %)**Downlink Command:**
772
773 0x28 01  ~/~/ Same As AT+SYNCMOD=1
774
775 0x28 00  ~/~/ Same As AT+SYNCMOD=0
776
777
778 == 3.7 Set Time Sync Interval ==
779
780
781 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
782
783 (% style="color:#037691" %)**AT Command:**
784
785 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:469px" %)
786 |=(% style="width: 163px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 306px;background-color:#4F81BD;color:white" %)**Function**
787 |AT+SYNCTDC=0x0A|(% style="width:306px" %)Set SYNCTDC to 10 (0x0A), so the sync time is 10 days.
788
789 (% style="color:#037691" %)**Downlink Command:**
790
791 0x29 0A  ~/~/ Same as AT+SYNCTDC=0x0A
792
793
794 == 3.8 Retrieve data ==
795
796
797 Feature: Retrieval data for specify time slot.
798
799 (% style="color:#037691" %)**AT Command**(%%)**:**
800
801 No AT Command, only valid for downlink command.
802
803
804 (% style="color:#037691" %)**Downlink Command:**
805
806 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
807
808
809 == 3.9 Enable Alarm mode ==
810
811
812 Feature: Enable Alarm Mode.
813
814 (% style="color:#037691" %)**AT Command: AT_WMOD**
815
816 Total bytes: 2
817
818 Example:
819
820 0xA500: AT+WMOD=0(default)
821
822 0xA501: AT+WMOD=1(alarm mode)
823
824
825 (% style="color:#037691" %)**Downlink Command:**
826
827 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
828
829
830 == 3.10 Alarm check time ==
831
832
833 Feature: The time interval to check sensor value for Alarm.
834
835 (% style="color:#037691" %)**AT Command: AT+CITEMP**
836
837 Total bytes: 3
838
839 Example:
840
841 0xA60001: AT+CITEMP=1(default)
842
843 Set collection interval in 1min,only in alarm mode
844
845
846 (% style="color:#037691" %)**Downlink Command:**
847
848 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
849
850
851 == 3.11 Set Alarm Threshold ==
852
853
854 Feature: Set Alarm Threshold.
855
856 (% style="color:#037691" %)**AT Command: AT+ARTEMP**
857
858 Total bytes: 9  Unit: ℃
859
860 Example:
861
862 A7FF380320FF380320
863
864 AT+ARTEMP=-200,800,-200,800
865
866
867 A7000A0064000A0065
868
869 AT+ARTEMP=10,100,10,101
870
871 Channel 1 operating temp:10~~100
872
873 Channel 2 operating temp:10~~101
874
875
876 (% style="color:#037691" %)**Downlink Command:**
877
878 [[See Poll Sensor Value>>||anchor="H2.5.3A0Pollsensorvalue"]].
879
880
881 == 3.12 Set Calibrate Value ==
882
883
884 Feature: Set Calibrate value for PT100 cable.  Detail of use of this command please see [[connect to a customized PT100 Probe>>||anchor="H6.2A0HowtoconnectacustomizedPT100cable3F"]].
885
886 (% style="color:#037691" %)**AT Command: AT+RCABLE**
887
888 Total bytes: 5
889
890 Example:
891
892 AT+RCABLE=296,300
893
894 Channel 1 rcable=0x0128/1000=0.296R
895
896 Channel 2 rcable=0x012C/1000=0.300R
897
898
899 (% style="color:#037691" %)**Downlink Command:**
900
901 0xA80128012C  ~-~->  Same as AT+RCABLE=296,300
902
903
904 == 3.13 Poll Calibrate Value ==
905
906
907 Feature: Poll Calibrate value. LTC2 will reply with this command send an uplink to server.
908
909 (% style="color:#037691" %)**AT Command: No AT Command.**
910
911
912 (% style="color:#037691" %)**Downlink Command:**
913
914 Example: A901
915
916 End nodes will send racable config to server
917
918 Like uplink payload: 010128012C
919
920
921 == 3.14 Print data entries base on page ==
922
923
924 Feature: Print the sector data from start page to stop page (max is 400 pages).
925
926 (% style="color:#037691" %)**AT Command: AT+PDTA**
927
928 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
929 |(% style="background-color:#4f81bd; color:white; width:157px" %)**Command Example**|(% style="background-color:#4f81bd; color:white; width:353px" %)**Response**
930 |(% style="width:156px" %)(((
931
932
933 AT+PDTA=259,260
934
935 Print page 259 to 260
936
937
938 )))|(% style="width:362px" %)(((
939 Stop Tx events when read sensor data
940
941 8021600 systime= 2021/5/16 00:17:44 1 3684 Temp1=28.71 Temp2=-327.67
942
943 8021610 systime= 2021/5/16 00:37:44 1 3685 Temp1=28.78 Temp2=-327.67
944
945 8021620 systime= 2021/5/16 00:57:44 1 3684 Temp1=28.83 Temp2=-327.67
946
947 8021630 systime= 2021/5/16 01:17:44 1 3684 Temp1=28.89 Temp2=-327.67
948
949 8021640 systime= 2021/5/16 01:37:44 1 3681 Temp1=28.79 Temp2=-327.67
950
951 8021650 systime= 2021/5/16 01:57:44 1 3681 Temp1=28.67 Temp2=-327.67
952
953 8021660 systime= 2021/5/16 02:17:44 1 3684 Temp1=28.60 Temp2=-327.67
954
955 8021670 systime= 2021/5/16 02:37:44 1 3684 Temp1=28.56 Temp2=-327.67
956
957 8021680 systime= 2021/5/16 02:57:44 1 3684 Temp1=28.52 Temp2=-327.67
958
959 8021690 systime= 2021/5/16 03:17:44 1 3684 Temp1=28.51 Temp2=-327.67
960
961 80216A0 systime= 2021/5/16 03:37:44 1 3684 Temp1=28.50 Temp2=-327.67
962
963 80216B0 systime= 2021/5/16 03:57:44 1 3684 Temp1=28.46 Temp2=-327.67
964
965 80216C0 systime= 2021/5/16 04:17:44 1 3684 Temp1=28.40 Temp2=-327.67
966
967 80216D0 systime= 2021/5/16 04:37:44 1 3683 Temp1=28.37 Temp2=-327.67
968
969 80216E0 systime= 2021/5/16 04:57:44 1 3684 Temp1=28.36 Temp2=-327.67
970
971 80216F0 systime= 2021/5/16 05:17:44 1 3685 Temp1=28.32 Temp2=-327.67
972
973 Start Tx events
974
975 OK
976 )))
977
978 (% style="color:#037691" %)**Downlink Command:**
979
980 No downlink commands for feature
981
982
983 == 3.15 Print last few data entries ==
984
985
986 Feature: Print the last few data entries
987
988 (% style="color:#037691" %)**AT Command: AT+PLDTA**
989
990 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
991 |(% style="background-color:#4f81bd; color:white; width:156px" %)**Command Example**|(% style="background-color:#4f81bd; color:white; width:354px" %)**Response**
992 |(((
993 AT+PLDTA=5
994
995 Print last 5 entries
996 )))|(% style="width:278px" %)(((
997 Stop Tx events when read sensor data
998
999 1 systime= 2021/5/17 03:12:37 1 3681 Temp1=26.01 Temp2=-327.67
1000
1001 2 systime= 2021/5/17 03:17:37 1 3682 Temp1=26.02 Temp2=-327.67
1002
1003 3 systime= 2021/5/17 03:22:37 1 3687 Temp1=25.94 Temp2=-327.67
1004
1005 4 systime= 2021/5/17 03:27:37 1 3684 Temp1=25.95 Temp2=-327.67
1006
1007 5 systime= 2021/5/17 03:32:37 1 3684 Temp1=26.20 Temp2=-327.67
1008
1009 Start Tx events
1010
1011 OK
1012 )))
1013
1014 (% style="color:#037691" %)**Downlink Command:**
1015
1016 No downlink commands for feature
1017
1018
1019 == 3.16 Clear Flash Record ==
1020
1021
1022 Feature: Clear flash storage for data log feature.
1023
1024 (% style="color:#037691" %)**AT Command: AT+CLRDTA**
1025
1026 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1027 |=(% style="width: 157px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 137px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 216px;background-color:#4F81BD;color:white" %)**Response**
1028 |(% style="width:157px" %)AT+CLRDTA|(% style="width:136px" %)Clear date record|(% style="width:213px" %)(((
1029 Clear all stored sensor data…
1030 OK
1031 )))
1032
1033 (% style="color:#037691" %)**Downlink Command: 0xA3**
1034
1035 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1036
1037 = 4.  Battery & Power Consumption =
1038
1039
1040 LTC2 uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
1041
1042 [[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
1043
1044
1045 = 5.  Firmware Change Log and Upload Firmware =
1046
1047
1048 (((
1049 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:
1050 )))
1051
1052 (((
1053
1054 )))
1055
1056 (((
1057 **Connection:**
1058 )))
1059
1060 * (((
1061 (% style="background-color:yellow" %)**ST-LINK v2 GND  <~-~->  LTC2 GND**
1062 )))
1063 * (((
1064 (% style="background-color:yellow" %)**ST-LINK v2 RESET  <~-~->  LTC2 NRST**
1065 )))
1066 * (((
1067 (% style="background-color:yellow" %)**ST-LINK v2 SWCLK  <~-~->  LTC2 SWCLK**
1068 )))
1069 * (((
1070 (% style="background-color:yellow" %)**ST-LINK v2 SWDIO  <~-~->  LTC2 SWDIO**
1071 )))
1072 * (((
1073 (% style="background-color:yellow" %)**LTC2 power must be on.  **
1074 )))
1075
1076 (((
1077
1078
1079 **Firmware Location and Change Log:  **[[https:~~/~~/www.dropbox.com/sh/8ghh32xavvsr98l/AADg-NbTnq80Re4Bcj7uekJFa?dl=0>>https://www.dropbox.com/sh/8ghh32xavvsr98l/AADg-NbTnq80Re4Bcj7uekJFa?dl=0]]
1080
1081 **Firmware Upgrade Method:**[[https:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H4.2.FirmwareupgradeusingSTM32Cubeprogramer>>https://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H4.2.FirmwareupgradeusingSTM32Cubeprogramer||style="background-color: rgb(255, 255, 255);"]]
1082 )))
1083
1084 = 6.  FAQ =
1085
1086 == 6.1  How to use AT Command to configure LTC2 ==
1087
1088
1089 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.
1090
1091
1092 **Connection:**
1093
1094 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->  LTC2 GND**
1095
1096 * (% style="background-color:yellow" %)**USB to TTL RXD  <~-~->  LTC2 TXD**
1097
1098 * (% style="background-color:yellow" %)**USB to TTL TXD  <~-~->  LTC2 RXD**
1099
1100 (((
1101 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.
1102 )))
1103
1104
1105 (((
1106 Input password and ATZ to activate LTC2,As shown below:
1107 )))
1108
1109 [[image:image-20220620151601-13.png||height="393" width="1042"]]
1110
1111
1112 == 6.2  How to connect a customized PT100 cable? ==
1113
1114
1115 (((
1116 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. 
1117 )))
1118
1119
1120 (((
1121 (% 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.
1122 )))
1123
1124 [[image:image-20220620152115-14.jpeg||height="548" width="763"]]
1125
1126 We know that the Multimeter has a shortcut resistance 0.002 ohm.
1127
1128
1129 (% style="color:blue" %)**Step 2**(%%): Measure the resistance between the two shorted wires of PT100 Probe.
1130
1131
1132 [[image:image-20220620152115-15.jpeg||height="791" width="704"]]
1133
1134 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) .
1135
1136
1137 (% style="color:blue" %)**Step 3**(%%): Run Calibrate Command.
1138
1139 Run this command to both channels to use 0.296R calibrate resistance.
1140
1141 (% style="color:red" %)**AT+RCABLE=296,0** (%%) ~-~->  Calibrate Channel 1 with 0.296R
1142
1143
1144 Or use LoRaWAN downlink command (0xA8 Code) to set: 0xA801280000
1145
1146 User can use 0xA9 downlink command to poll the current calibration value.
1147
1148
1149 (% style="color:blue" %)**Step 4**(%%)**: **Connect the PT100 to LTC2
1150
1151 [[image:image-20220620152115-16.png]]
1152
1153
1154 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.
1155
1156
1157 == 6.3  What is the frequency range of LTC2 LoRa part? ==
1158
1159
1160 Different LTC2 version supports different frequency range, below is the table for the working frequency and recommend bands for each model:
1161
1162 [[image:image-20230427172553-5.jpeg||height="146" width="639"]]
1163
1164
1165 == 6.4  How to change the LoRa Frequency Bands/Region ==
1166
1167
1168 You can follow the instructions for [[how to upgrade image>>||anchor="H5.A0FirmwareChangeLogandUploadFirmware"]].
1169 When downloading the images, choose the required image file for download. ​
1170
1171 (% style="display:none" %) (%%)
1172
1173
1174 == 6.5 How can I read sensor data without LoRaWAN? For Calibration Purpose ==
1175
1176 Some clients need to calibrate the sensor value in calibration Lab. In such case, Reading the data without LoRaWAN network is more convenient. To achieve this, use can use a USB-TTL Adapter  to connect the LTC2 Motherboard's UART pins while still have the probe connected. See below.
1177
1178 [[image:image-20240417153156-3.jpeg||height="636" width="930"]]
1179
1180
1181 After there is UART Connection, reset the node.
1182
1183 Example output:
1184
1185 [[image:image-20240312141207-3.png||height="527" width="930"]]
1186
1187
1188 == 6.6 LTC2 supported with 3-wire PT100 ==
1189
1190 The LTC2 uses the bridge method to measure temperature and supports the use of 3-wire PT100.
1191
1192 The difference between the wiring mode of three-wire PT100 and four-wire PT100 and the difference in the detection principle：
1193
1194 * Three wire PT100 adopts bridge method to measure data, and the relationship between the output temperature value and the output value of analog quantity.
1195 * The four-wire PT100 has no bridge, is sent by constant current source, voltmeter measurement, and finally gives the measured resistance value.
1196
1197 [[image:image-20240417145507-1.jpeg||height="234" width="522"]]
1198
1199 [[image:image-20240417145520-2.jpeg||height="182" width="523"]]
1200
1201
1202 **Note:** **2-wire PT100, current loop and voltage measurement loop combined in one, poor accuracy, not discussed.**
1203
1204
1205
1206 = 7.  Trouble Shooting =
1207
1208 == 7.1  AT Command input doesn't work ==
1209
1210
1211 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.
1212
1213
1214 = 8.  Order Info =
1215
1216
1217 Part Number **:** (% style="color:blue" %)**LTC2-XXX-YYY**
1218
1219 (% style="color:#0000ff" %)**XXX**(%%)**: **Probe Version
1220
1221 * (% style="color:red" %)**SI**(%%):  Standard IP68 probe x 1
1222 * (% style="color:red" %)**LT**(%%):  Low Temperature probe x 1
1223 * (% style="color:red" %)**HT**(%%): High Temperature probe x 1
1224 * (% style="color:red" %)**FSA**(%%):  Food Safety probe x 1
1225 * (% style="color:red" %)**FT**(%%):  Flat Type probe x 1
1226 * (% style="color:red" %)**NA**(%%): No probe
1227
1228 (% style="color:#0000ff" %)**YYY**(%%)**: **The default frequency band
1229
1230 * (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1231 * (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1232 * (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1233 * (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1234 * (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1235 * (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1236 * (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1237 * (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1238
1239 = 9. ​ Packing Info =
1240
1241
1242 **Package Includes**:
1243
1244 * LTC2 LoRaWAN Temperature Transmitter x 1
1245
1246 **Dimension and weight**:
1247
1248 * Device Size: cm
1249 * Device Weight: g
1250 * Package Size / pcs : cm
1251 * Weight / pcs : g
1252
1253 = 10.  ​Support =
1254
1255
1256 * 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.
1257 * 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]].
1258
1259

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