Version 35.1 by Xiaoling on 2022/06/25 17:32
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1 (% style="text-align:center" %)
2 [[image:1654669760488-506.png||height="510" width="769"]]
3
4
5
6 **Table of 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 = 2. Power ON LWL02 =
84
85 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.
86
87
88 = 3. How to install LWL02 =
89
90 (((
91 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.
92 )))
93
94 [[image:image-20220608144447-4.png]]
95
96
97
98 = 4. Operation Mode =
99
100 == 4.1 How it works? ==
101
102 (((
103 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.
104 )))
105
106 (((
107 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.
108 )))
109
110
111 == 4.2 Example to join LoRaWAN network ==
112
113 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. 
114
115 [[image:1654671007127-335.png]]
116
117
118 (((
119 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.
120 )))
121
122 * (((
123 A keep-alive message which send once per day.
124 )))
125 * (((
126 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
127 )))
128 * (((
129 A periodically update at every 10 minutes when in water leak.
130 )))
131 * (((
132 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
133 )))
134
135 (((
136
137
138 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:
139 )))
140
141 (((
142 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
143 )))
144
145 (((
146 Each LWL02 is shipped with a sticker with unique device EUI:
147 )))
148
149 [[image:1654671040430-368.png]]
150
151
152 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
153
154 **Add APP EUI in the application**
155
156 [[image:1654671794691-956.png]]
157
158
159 [[image:1654671809850-574.png]]
160
161 [[image:1654671820156-640.png]]
162
163
164 [[image:1654671832011-696.png]]
165
166
167 **Add APP KEY and DEV EUI**
168
169 [[image:1654671889112-678.png]]
170
171
172 (% 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.
173
174
175 [[image:1654681465260-713.png]]
176
177
178
179 == 4.3 Uplink Payload ==
180
181
182 Uplink Payload total 9 bytes.
183
184 [[image:image-20220608150921-5.png]]
185
186
187 **Example:**
188
189 [[image:1654672186477-234.png]]
190
191
192 (((
193 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/]]
194 )))
195
196
197 == 4.4 Downlink Payload ==
198
199
200 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
201 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
202 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
203 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
204 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
205 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
206 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
207 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
208 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
209
210 Example Downlink payload setting in TTN V3:
211
212 [[image:1654673412319-976.png]]
213
214
215 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
216
217 If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
218
219
220 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
221
222 If payload = 0x04FF, it will reset the LWL02.
223
224
225 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
226
227 0x05 00: Set uplink to LoRaWAN unconfirmed mode
228
229 0x05 01: Set uplink to LoRaWAN confirmed mode
230
231
232 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
233
234 Example: 0xA601: Clear Counting
235 For LWL02: reset both count number and time.
236
237
238 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
239
240 0xA7 01 : Equal to AT+DISALARM=1
241
242 0xA7 00 : Equal to AT+DISALARM=0
243
244
245 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
246
247 Format: 0xA8 aa bb
248
249 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
250
251 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
252
253 Example: 0x A8 00 02 : Set ADR=0 and DR=1
254
255
256 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
257
258 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
259
260
261 == 4.5 Integrate with Datacake ==
262
263 (((
264 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:
265 )))
266
267
268 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
269
270 (% 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:
271
272
273 [[image:1654674520913-519.png]]
274
275
276 [[image:1654674530910-914.png]]
277
278
279 [[image:1654674543078-401.png]]
280
281
282 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
283
284 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
285
286 [[image:1654674556510-911.png]]
287
288
289 == 4.6 Alarm Base on Timeout ==
290
291 (((
292 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.
293 )))
294
295 (((
296 User configure this feature by using:
297 )))
298
299 (((
300
301 )))
302
303 (((
304 (% style="color:blue" %)**AT Command**(%%) to configure:
305 )))
306
307 * (((
308 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
309 )))
310
311 (((
312 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.
313 )))
314
315 * (((
316 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
317 )))
318
319 (((
320 (% style="color:blue" %)**Downlink Command**(%%) to configure:
321 )))
322
323 (((
324 **Command: 0xA9 aa bb cc**
325 )))
326
327 (((
328 A9: Command Type Code
329 )))
330
331 (((
332 aa: status to be monitor
333 )))
334
335 (((
336 bb cc: timeout.
337 )))
338
339 (((
340
341 )))
342
343 (((
344 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
345 )))
346
347 (((
348 Or
349 )))
350
351 (((
352 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
353 )))
354
355
356
357 == 4.7 LEDs ==
358
359
360 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
361 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
362 |(% 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(%%)**
363 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
364 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
365 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
366
367
368
369 = 5. Battery & How to replace =
370
371 == 5.1 Battery Type and replace ==
372
373 (((
374 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:
375 )))
376
377 1. (((
378 The LWL02 doesn’t have any screw, use can use nail to open it by the middle.
379 )))
380 1. (((
381 Make sure the direction is correct when install the AAA batteries.
382 )))
383
384 (((
385 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn’t have broken surface.**
386 )))
387
388 (((
389
390 )))
391
392 (((
393 Example of AAA LR03 batter:
394 )))
395
396 [[image:1654675278044-307.png]]
397
398
399 == 5.2 Power Consumption Analyze ==
400
401 (((
402 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:
403 )))
404
405 (((
406 [[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]]
407 )))
408
409
410 = 6. Use AT Command =
411
412 == 6.1 Access AT Command ==
413
414 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
415
416 [[image:image-20220608160336-1.png]]
417
418
419 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
420
421 (% style="background-color:yellow" %)**RX <- -> TX**
422
423 (% style="background-color:yellow" %)**TX <- -> RX**
424
425 (% style="background-color:yellow" %)**GND <- -> GND**
426
427
428 (((
429 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:
430 )))
431
432 (((
433 The AT Access password is (% style="color:red" %)**123456**.
434 )))
435
436 [[image:1654675618022-630.png]]
437
438 (((
439 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
440 )))
441
442 (((
443 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.
444 )))
445
446 (((
447 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/]]
448 )))
449
450
451 = 7. FAQ =
452
453 == 7.1 How to upgrade the image? ==
454
455 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]]
456
457
458 == 7.2 How to change the LoRa Frequency Bands/Region? ==
459
460 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.
461
462
463 == 7.3 Can I disable uplink for each event to save battery life? ==
464
465 Yes, User can use below method to disable this:
466
467 (% style="color:#4f81bd" %)**via AT Command**:
468
469 AT+DISALARM=1,  End node will only send packet in TDC time.
470
471 AT+DISALARM=0,  End node will send packet in TDC time or status change for door sensor. 
472
473
474 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
475
476 0xA701 :  Equal to AT+DISALARM=1
477
478 0xA700 :  Equal to AT+DISALARM=0
479
480
481 = 8. Order Info =
482
483 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
484
485 (% style="color:blue" %)**XXX:**
486
487 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
488 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
489 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
490 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
491 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
492 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
493 * (% style="color:red" %)**US915**(%%): frequency bands  US915
494 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
495 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
496
497
498
499 = 9. Packing Info =
500
501 **Package Includes**:
502
503 * LWL02 x 1
504
505
506
507 = 10. Support =
508
509 * 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.
510 * 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]].
511
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