Version 29.1 by Xiaoling on 2022/06/08 16:51
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1 (% style="text-align:center" %)
2 [[image:1654669760488-506.png||height="510" width="769"]]
3
4
5
6 **Contents:**
7
8 {{toc/}}
9
10
11
12
13
14 = 1. Introduction =
15
16 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
17
18
19 (((
20 The Dragino LWL02 is a (% style="color:#4f81bd" %)**LoRaWAN Water Sensor**(%%). When there is water between the two metal probes, LWL02 indicates a water leak event and uplink to IoT server via LoRaWAN network.
21 )))
22
23 (((
24 LWL02 is powered by (% style="color:#4f81bd" %)**2 x AAA batteries**(%%) and target for long time use, these two batteries can provide about 16,000 ~~ 70,000 uplink packets, which result in 2 ~~ 10 years battery life. After battery running out, user can easily open the enclosure and replace with 2 common AAA batteries.
25 )))
26
27 (((
28 The LWL02 will send periodically data every day as well as for each water leak event. It also (% style="color:#4f81bd" %)**counts the water leak times**(%%) and (% style="color:#4f81bd" %)**calculate last water leak duration**(%%). User can also disable the uplink for each water leak event, instead, device can count each event and uplink periodically.
29 )))
30
31 (((
32 Each LWL02 is (% style="color:#4f81bd" %)**pre-load with a set of unique keys**(%%) for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
33 )))
34
35 [[image:image-20220608143744-1.png]]
36
37
38
39 == 1.2 Features ==
40
41 * LoRaWAN Class A v1.0.3
42 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
43 * SX1262 LoRa Core
44 * Water Leak detect
45 * 2 x AAA LR03 Batteries
46 * AT Commands to change parameters
47 * Uplink on periodically and open/close action
48 * Remote configure parameters via LoRa Downlink
49 * Firmware upgradable via program port
50
51
52
53 == 1.3 Applications ==
54
55 * Smart Buildings & Home Automation
56 * Logistics and Supply Chain Management
57 * Smart Metering
58 * Smart Agriculture
59 * Smart Cities
60 * Smart Factory
61
62
63
64 == 1.4 Dimension ==
65
66 [[image:image-20220608143952-2.png]]
67
68 [[image:1654670405145-346.png]]
69
70
71
72 == 1.5 Firmware Change log ==
73
74 (((
75 LWL02 use the same firmware as LDS01.
76 )))
77
78 (((
79 [[LWL02 Image files – Download link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Firmware/]]
80 )))
81
82
83
84 = 2. Power ON LWL02 =
85
86 When receive the LWL02, please open the enclosure and add 2 x AAA batteries to power it. The [[LED>>||anchor="H4.7LEDs"]] will blink when device is powered.
87
88
89 = 3. How to install LWL02 =
90
91 (((
92 When install the LWL02 on wall. Please install as below so the water leak probe will be soak in water for water detect purpose. The LWL02 main body is not water proof. Please don’t let water go inside the LWL02 main body.
93 )))
94
95 [[image:image-20220608144447-4.png]]
96
97
98
99 = 4. Operation Mode =
100
101 == 4.1 How it works? ==
102
103 (((
104 The LWL02 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and [[power on>>||anchor="H2.PowerONLWL02"]] the LWL02. It will auto join the network via OTAA.
105 )))
106
107 (((
108 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H6.UseATCommand"]] to set the keys in the devices.
109 )))
110
111
112 == 4.2 Example to join LoRaWAN network ==
113
114 Here shows an example for how to join the [[TTN V3 Network>>url:https://eu1.cloud.thethings.network/]]. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here. 
115
116 [[image:1654671007127-335.png]]
117
118
119 (((
120 The LWL02 has water leak detect probe as above. When there is water between these two detect probe, they will be short and generate the water leak event. and send the status to LoRaWAN server. The LWL02 will uplink two type of messages to the server.
121 )))
122
123 * (((
124 A keep-alive message which send once per day.
125 )))
126 * (((
127 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
128 )))
129 * (((
130 A periodically update at every 10 minutes when in water leak.
131 )))
132 * (((
133 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
134 )))
135
136 (((
137 The LG308 is already set to connect to [[TTN V3 network >>url:https://eu1.cloud.thethings.network/]]. What we need to now is only configure the TTN V3:
138 )))
139
140 (((
141 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
142 )))
143
144 (((
145 Each LWL02 is shipped with a sticker with unique device EUI:
146 )))
147
148 [[image:1654671040430-368.png]]
149
150
151 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
152
153 **Add APP EUI in the application**
154
155 [[image:1654671794691-956.png]]
156
157
158 [[image:1654671809850-574.png]]
159
160 [[image:1654671820156-640.png]]
161
162
163 [[image:1654671832011-696.png]]
164
165
166 **Add APP KEY and DEV EUI**
167
168
169 (% style="color:blue" %)**Step 2**(%%): **[[Power on>>||anchor="H2.PowerONLWL02"]]** LWL02 and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
170
171 [[image:1654671889112-678.png]]
172
173
174 == 4.3 Uplink Payload ==
175
176
177 Uplink Payload total 9 bytes.
178
179 [[image:image-20220608150921-5.png]]
180
181
182 **Example:**
183
184 [[image:1654672186477-234.png]]
185
186
187 (((
188 Example Payload Decoder in TTN V3: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Payload/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Payload/]]
189 )))
190
191
192 == 4.4 Downlink Payload ==
193
194
195 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
196 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
197 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
198 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
199 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
200 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
201 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
202 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
203 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
204
205 Example Downlink payload setting in TTN V3:
206
207 [[image:1654673412319-976.png]]
208
209
210 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
211
212 If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
213
214
215 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
216
217 If payload = 0x04FF, it will reset the LWL02.
218
219
220 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
221
222 0x05 00: Set uplink to LoRaWAN unconfirmed mode
223
224 0x05 01: Set uplink to LoRaWAN confirmed mode
225
226
227 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
228
229 Example: 0xA601: Clear Counting
230 For LWL02: reset both count number and time.
231
232
233 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
234
235 0xA7 01 : Equal to AT+DISALARM=1
236
237 0xA7 00 : Equal to AT+DISALARM=0
238
239
240 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
241
242 Format: 0xA8 aa bb
243
244 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
245
246 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
247
248 Example: 0x A8 00 02 : Set ADR=0 and DR=1
249
250
251 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
252
253 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
254
255
256 == 4.5 Integrate with Datacake ==
257
258 (((
259 Datacake provides a human friendly interface to show the sensor data, once we have data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
260 )))
261
262
263 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
264
265 (% style="color:blue" %)**Step 2**(%%): To configure the Application to forward data to Datacake you will need to add integration. To add the Datacake integration, perform the following steps:
266
267
268 [[image:1654674520913-519.png]]
269
270
271 [[image:1654674530910-914.png]]
272
273
274 [[image:1654674543078-401.png]]
275
276
277 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
278
279 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
280
281 [[image:1654674556510-911.png]]
282
283
284 == 4.6 Alarm Base on Timeout ==
285
286 (((
287 LWL02 can monitor the timeout for a status change, this feature can be used to monitor some event such as open fridge too long etc.
288 )))
289
290 (((
291 User configure this feature by using:
292 )))
293
294 (((
295
296 )))
297
298 (((
299 (% style="color:blue" %)**AT Command**(%%) to configure:
300 )))
301
302 * (((
303 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
304 )))
305
306 (((
307 status for more than 30 seconds. LWL02 will send an uplink packet, the Alarm bit (the lowest bit of 10^^th^^ byte of payload) on this uplink packet is set to 1.
308 )))
309
310 * (((
311 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
312 )))
313
314 (((
315 (% style="color:blue" %)**Downlink Command**(%%) to configure:
316 )))
317
318 (((
319 **Command: 0xA9 aa bb cc**
320 )))
321
322 (((
323 A9: Command Type Code
324 )))
325
326 (((
327 aa: status to be monitor
328 )))
329
330 (((
331 bb cc: timeout.
332 )))
333
334 (((
335
336 )))
337
338 (((
339 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
340 )))
341
342 (((
343 Or
344 )))
345
346 (((
347 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
348 )))
349
350
351
352 == 4.7 LEDs ==
353
354
355 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
356 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
357 |(% style="width:184px" %)Power On|(% style="width:275px" %)(% style="color:green" %)**GREEN on 1s, **(% style="color:red" %)**RED on 1s,**(%%)** (% style="color:blue" %)BLUE on 1s(%%)**
358 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
359 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
360 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
361
362 = 5. Battery & How to replace =
363
364 == 5.1 Battery Type and replace ==
365
366 (((
367 LWL02 is equipped with 2 x AAA LR03 batteries. If the batteries running low(see 2.1v in the platform). User can buy generic AAA battery and replace it. Note:
368 )))
369
370 1. (((
371 The LWL02 doesn’t have any screw, use can use nail to open it by the middle.
372 )))
373 1. (((
374 Make sure the direction is correct when install the AAA batteries.
375 )))
376
377 (((
378 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn’t have broken surface.**
379 )))
380
381 (((
382
383 )))
384
385 (((
386 Example of AAA LR03 batter:
387 )))
388
389 [[image:1654675278044-307.png]]
390
391
392 == 5.2 Power Consumption Analyze ==
393
394 (((
395 Dragino battery powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimate battery life:
396 )))
397
398 (((
399 [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf]]
400 )))
401
402
403
404 = 6. Use AT Command =
405
406 == 6.1 Access AT Command ==
407
408 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
409
410 [[image:image-20220608160336-1.png]]
411
412
413 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
414
415 (% style="background-color:yellow" %)**RX <- -> TX**
416
417 (% style="background-color:yellow" %)**TX <- -> RX**
418
419 (% style="background-color:yellow" %)**GND <- -> GND**
420
421
422 (((
423 In PC, User needs to set (% style="color:#037691" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**115200**(%%) to access to access serial console of LWL02. Below is the output for reference:
424 )))
425
426 (((
427 The AT Access password is (% style="color:red" %)**123456**.
428 )))
429
430 [[image:1654675618022-630.png]]
431
432 (((
433 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
434 )))
435
436 (((
437 When entering the first command, the (% style="color:red" %)**RED LED**(%%) will on and user can now input AT Commands. After input all needed AT Commands, please input AT+CLPM=1 to set the device to work in Low Power mode and (% style="color:red" %)**RED LED**(%%) will be off.
438 )))
439
440 (((
441 More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/]]
442 )))
443
444
445
446 = 7. FAQ =
447
448 == 7.1 How to upgrade the image? ==
449
450 User can upgrade the of LWL02 for bug fix, new features, or change working region. The upgrade instruction is here: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
451
452
453 == 7.2 How to change the LoRa Frequency Bands/Region? ==
454
455 If user has for example US915 frequency and want to change it to AS923 frequency. User can follow the introduction for [[how to upgrade image>>||anchor="H7.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
456
457
458 == 7.3 Can I disable uplink for each event to save battery life? ==
459
460 Yes, User can use below method to disable this:
461
462 (% style="color:#4f81bd" %)**via AT Command**:
463
464 AT+DISALARM=1, End node will only send packet in TDC time.
465
466 AT+DISALARM=0, End node will send packet in TDC time or status change for door sensor. 
467
468 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
469
470 0xA701 : Equal to AT+DISALARM=1
471
472 0xA700 : Equal to AT+DISALARM=0
473
474
475 = 8. Order Info =
476
477 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
478
479 (% style="color:blue" %)**XXX:**
480
481 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
482 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
483 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
484 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
485 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
486 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
487 * (% style="color:red" %)**US915**(%%): frequency bands  US915
488 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
489 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
490
491 = 9. Packing Info =
492
493
494 **Package Includes**:
495
496 * LWL02 x 1
497
498 = 10.Support =
499
500 * 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.
501 * 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:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
502
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