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Version 79.21 by Xiaoling on 2023/06/14 15:33
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2 [[image:image-20230613133716-2.png||height="717" width="717"]]
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11 **Table of Contents：**
12
13 {{toc/}}
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18
19
20 = 1. Introduction =
21
22 == 1.1 What is LoRaWAN Ultrasonic liquid level Sensor ==
23
24
25 The Dragino DDS20-LB is a (% style="color:blue" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:blue" %)**none-contact method **(%%)to measure the (% style="color:blue" %)**height of liquid**(%%) in a container without opening the container, and send the value via LoRaWAN network to IoT Server.
26
27 The DDS20-LB sensor is installed directly below the container to detect the height of the liquid level. User doesn't need to open a hole on the container to be tested. The none-contact measurement makes the measurement safety, easier and possible for some strict situation. 
28
29 DDS20-LB uses (% style="color:blue" %)**ultrasonic sensing technology**(%%) for distance measurement. DDS20-LB is of high accuracy to measure various liquid such as: (% style="color:blue" %)**toxic substances**(%%), (% style="color:blue" %)**strong acids**(%%), (% style="color:blue" %)**strong alkalis**(%%) and (% style="color:blue" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
30
31 The LoRa wireless technology used in DDS20-LB allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
32
33 DDS20-LB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use.
34
35 DDS20-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.
36
37 Each DDS20-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.
38
39 [[image:image-20230613140115-3.png||height="453" width="800"]]
40
41
42 == 1.2 ​Features ==
43
44
45 * LoRaWAN 1.0.3 Class A
46 * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
47 * Ultra-low power consumption
48 * Liquid Level Measurement by Ultrasonic technology
49 * Measure through container, No need to contact Liquid
50 * Valid level range 20mm - 2000mm
51 * Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
52 * Cable Length : 25cm
53 * Support Bluetooth v5.1 and LoRaWAN remote configure
54 * Support wireless OTA update firmware
55 * AT Commands to change parameters
56 * Downlink to change configure
57 * IP66 Waterproof Enclosure
58 * 8500mAh Battery for long term use
59
60
61 == 1.3 Specification ==
62
63
64 (% style="color:#037691" %)**Common DC Characteristics:**
65
66 * Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~~ 3.6v
67 * Operating Temperature: -40 ~~ 85°C
68
69 (% style="color:#037691" %)**LoRa Spec:**
70
71 * Frequency Range,  Band 1 (HF): 862 ~~ 1020 Mhz
72 * Max +22 dBm constant RF output vs.
73 * RX sensitivity: down to -139 dBm.
74 * Excellent blocking immunity
75
76 (% style="color:#037691" %)**Battery:**
77
78 * Li/SOCI2 un-chargeable battery
79 * Capacity: 8500mAh
80 * Self-Discharge: <1% / Year @ 25°C
81 * Max continuously current: 130mA
82 * Max boost current: 2A, 1 second
83
84 (% style="color:#037691" %)**Power Consumption**
85
86 * Sleep Mode: 5uA @ 3.3v
87 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
88
89
90 == 1.4 Suitable Container & Liquid ==
91
92
93 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
94 * Container shape is regular, and surface is smooth.
95 * Container Thickness:
96 ** Pure metal material.  2~~8mm, best is 3~~5mm
97 ** Pure non metal material: <10 mm
98 * Pure liquid without irregular deposition.
99
100
101 (% style="display:none" %)
102
103 == 1.5 Install DDS20-LB ==
104
105
106 (% style="color:blue" %)**Step 1**(%%):  ** Choose the installation point.**
107
108 DDS20-LB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
109
110 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-3.png?rev=1.1||alt="image-20220615091045-3.png"]]
111
112
113 (((
114 (% style="color:blue" %)**Step 2**(%%):  **Polish the installation point.**
115 )))
116
117 (((
118 For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
119 )))
120
121 [[image:image-20230613143052-5.png]]
122
123
124 No polish needed if the container is shine metal surface without paint or non-metal container.
125
126 [[image:image-20230613143125-6.png]]
127
128
129 (((
130 (% style="color:blue" %)**Step3:   **(%%)**Test the installation point.**
131 )))
132
133 (((
134 Power on DDS20-LB, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
135 )))
136
137 (((
138 It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-LB won't detect the liquid level.
139 )))
140
141 (((
142 After paste the DDS20-LB well, power on DDS20-LB. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
143 )))
144
145
146 (((
147 (% style="color:blue" %)**LED Status:**
148 )))
149
150 * (((
151 **Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
152 )))
153
154 * (((
155 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** always ON**(%%): Sensor is power on but doesn't detect liquid. There is problem in installation point.
156 )))
157 * (((
158 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** slowly blinking**(%%): Sensor detects Liquid Level, The installation point is good.
159 )))
160
161 (((
162 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
163 )))
164
165
166 (((
167 (% style="color:red" %)**Note :**(%%)** (% style="color:blue" %)Ultrasonic coupling paste(%%)**(% style="color:blue" %) (%%) is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.
168 )))
169
170
171 (((
172 (% style="color:blue" %)**Step4:   **(%%)**Install use Epoxy ab glue.**
173 )))
174
175 (((
176 Prepare Eproxy AB glue.
177 )))
178
179 (((
180 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
181 )))
182
183 (((
184 Reset DDS20-LB and see if the BLUE LED is slowly blinking.
185 )))
186
187 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-8.png?width=341&height=203&rev=1.1||alt="image-20220615091045-8.png"]] [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-9.png?width=284&height=200&rev=1.1||alt="image-20220615091045-9.png"]]
188
189
190 (((
191 (% style="color:red" %)**Note :**
192
193 (% style="color:red" %)**1:**(%%)** (% style="color:blue" %)Eproxy AB glue(%%)** needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
194 )))
195
196 (((
197 (% style="color:red" %)**2:**(%%)** (% style="color:blue" %)Eproxy AB glue(%%)** is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.
198 )))
199
200
201 == 1.6 Applications ==
202
203
204 * Smart liquid control solution
205
206 * Smart liquefied gas solution
207
208
209 == 1.7 Precautions ==
210
211
212 * At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
213
214 * For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
215
216 * When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
217
218 (% style="display:none" %)
219
220 == 1.8 Sleep mode and working mode ==
221
222
223 (% style="color:blue" %)**Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.
224
225 (% style="color:blue" %)**Working Mode:** (%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.
226
227
228 == 1.9 Button & LEDs ==
229
230
231 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
232
233
234 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
235 |=(% style="width: 167px;background-color:#D9E2F3;color:#0070C0" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 225px;background-color:#D9E2F3;color:#0070C0" %)**Action**
236 |(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
237 If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
238 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
239 )))
240 |(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
241 (% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:#037691" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network.
242 (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
243 Once sensor is active, BLE module will be active and user can connect via BLE to configure device, no matter if device join or not join LoRaWAN network.
244 )))
245 |(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode.
246
247
248 == 1.10 BLE connection ==
249
250
251 DDS20-LB support BLE remote configure.
252
253 BLE can be used to configure the parameter of sensor or see the console output from sensor. BLE will be only activate on below case:
254
255 * Press button to send an uplink
256 * Press button to active device.
257 * Device Power on or reset.
258
259 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
260
261
262 == 1.11 Pin Definitions ==
263
264 [[image:image-20230523174230-1.png]]
265
266
267 == 1.12 Mechanical ==
268
269
270 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143884058-338.png]]
271
272
273 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143899218-599.png]]
274
275
276 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143909447-639.png]]
277
278
279 (% style="color:blue" %)**Probe Mechanical:**
280
281 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615090910-1.png?rev=1.1||alt="image-20220615090910-1.png"]]
282
283
284 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615090910-2.png?rev=1.1||alt="image-20220615090910-2.png"]]
285
286
287 = 2. Configure DDS20-LB to connect to LoRaWAN network =
288
289 == 2.1 How it works ==
290
291
292 The DDS20-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and press the button to activate the DDS20-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.
293
294 (% style="display:none" %) (%%)
295
296 == 2.2 ​Quick guide to connect to LoRaWAN server (OTAA) ==
297
298
299 Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LPS8v2>>url:https://www.dragino.com/products/lora-lorawan-gateway/item/228-lps8v2.html]] as a LoRaWAN gateway in this example.
300
301 The LPS8v2 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.
302
303 [[image:image-20230613140140-4.png||height="453" width="800"]](% style="display:none" %)
304
305
306 (% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DDS20-LB.
307
308 Each DDS20-LB is shipped with a sticker with the default device EUI as below:
309
310 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
311
312
313 You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:
314
315
316 (% style="color:blue" %)**Register the device**
317
318 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/1654935135620-998.png?rev=1.1||alt="1654935135620-998.png"]]
319
320
321 (% style="color:blue" %)**Add APP EUI and DEV EUI**
322
323 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-4.png?width=753&height=551&rev=1.1||alt="图片-20220611161308-4.png"]]
324
325
326 (% style="color:blue" %)**Add APP EUI in the application**
327
328
329 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-5.png?width=742&height=601&rev=1.1||alt="图片-20220611161308-5.png"]]
330
331
332 (% style="color:blue" %)**Add APP KEY**
333
334 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-6.png?width=744&height=485&rev=1.1||alt="图片-20220611161308-6.png"]]
335
336
337 (% style="color:blue" %)**Step 2:**(%%) Activate on DDS20-LB
338
339
340 Press the button for 5 seconds to activate the DDS20-LB.
341
342 (% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:blue" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network. (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
343
344 After join success, it will start to upload messages to TTN and you can see the messages in the panel.
345
346
347 == 2.3  ​Uplink Payload ==
348
349
350 (((
351 DDS20-LB will uplink payload via LoRaWAN with below payload format: 
352 )))
353
354 (((
355 Uplink payload includes in total 8 bytes.
356 )))
357
358 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
359 |=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)(((
360 **Size(bytes)**
361 )))|=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="background-color:#D9E2F3;color:#0070C0" %)1|=(% style="background-color:#D9E2F3;color:#0070C0" %)2|=(% style="background-color:#D9E2F3;color:#0070C0" %)**1**
362 |(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
363 [[Distance>>||anchor="H2.3.2A0Distance"]]
364 (unit: mm)
365 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
366 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
367 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
368
369 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/1654850511545-399.png?rev=1.1||alt="1654850511545-399.png"]]
370
371
372 === 2.3.1  Battery Info ===
373
374
375 Check the battery voltage for DDS20-LB.
376
377 Ex1: 0x0B45 = 2885mV
378
379 Ex2: 0x0B49 = 2889mV
380
381
382 === 2.3.2  Distance ===
383
384
385 (((
386 Get the distance. Flat object range 20mm - 2000mm.
387 )))
388
389 (((
390 For example, if the data you get from the register is **0x06 0x05**, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** **
391
392 (% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
393 )))
394
395 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
396
397 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
398
399
400 === 2.3.3  Interrupt Pin ===
401
402
403 This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3.2SetInterruptMode"]] for the hardware and software set up.
404
405 **Example:**
406
407 0x00: Normal uplink packet.
408
409 0x01: Interrupt Uplink Packet.
410
411
412 === 2.3.4  DS18B20 Temperature sensor ===
413
414
415 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
416
417 **Example**:
418
419 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
420
421 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
422
423
424 === 2.3.5  Sensor Flag ===
425
426
427 (((
428 0x01: Detect Ultrasonic Sensor
429 )))
430
431 (((
432 0x00: No Ultrasonic Sensor
433 )))
434
435
436 === 2.3.6  Decode payload in The Things Network ===
437
438
439 While using TTN network, you can add the payload format to decode the payload.
440
441 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654850829385-439.png?rev=1.1||alt="1654850829385-439.png"]]
442
443 The payload decoder function for TTN V3 is here:
444
445 (((
446 DDS20-LB TTN V3 Payload Decoder:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
447 )))
448
449
450 == 2.4  Uplink Interval ==
451
452
453 The DDS20-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>||anchor="H3.3.1SetTransmitIntervalTime"]]
454
455
456 == 2.5  ​Show Data in DataCake IoT Server ==
457
458
459 (((
460 [[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, once we have data in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps:
461 )))
462
463
464 (((
465 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
466 )))
467
468 (((
469 (% 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:**
470 )))
471
472
473 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654592790040-760.png?rev=1.1||alt="1654592790040-760.png"]]
474
475
476 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654592800389-571.png?rev=1.1||alt="1654592800389-571.png"]]
477
478
479 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
480
481 (% style="color:blue" %)**Step 4**(%%)**: Search the DDS20-LB and add DevEUI.**
482
483 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654851029373-510.png?rev=1.1||alt="1654851029373-510.png"]]
484
485
486 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
487
488 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20220610165129-11.png?width=1088&height=595&rev=1.1||alt="image-20220610165129-11.png"]]
489
490
491 == 2.6 Datalog Feature ==
492
493
494 Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, DDS20-LB will store the reading for future retrieving purposes.
495
496
497 === 2.6.1 Ways to get datalog via LoRaWAN ===
498
499
500 Set PNACKMD=1, DDS20-LB will wait for ACK for every uplink, when there is no LoRaWAN network,DDS20-LB will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
501
502 * (((
503 a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
504 )))
505 * (((
506 b) DDS20-LB will send data in **CONFIRMED Mode** when PNACKMD=1, but DDS20-LB won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if DDS20-LB gets a ACK, DDS20-LB will consider there is a network connection and resend all NONE-ACK messages.
507 )))
508
509 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
510
511 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220703111700-2.png?width=1119&height=381&rev=1.1||alt="图片-20220703111700-2.png" height="381" width="1119"]]
512
513
514 === 2.6.2 Unix TimeStamp ===
515
516
517 DDS20-LB uses Unix TimeStamp format based on
518
519 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220523001219-11.png?width=627&height=97&rev=1.1||alt="图片-20220523001219-11.png" height="97" width="627"]]
520
521 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
522
523 Below is the converter example
524
525 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220523001219-12.png?width=720&height=298&rev=1.1||alt="图片-20220523001219-12.png" height="298" width="720"]]
526
527
528 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
529
530
531 === 2.6.3 Set Device Time ===
532
533
534 User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
535
536 Once DDS20-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DDS20-LB. If DDS20-LB fails to get the time from the server, DDS20-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
537
538 (% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 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 V3 v2 if SYNCMOD=1.**
539
540
541 === 2.6.4 Poll sensor value ===
542
543
544 Users can poll sensor values based on timestamps. Below is the downlink command.
545
546 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
547 |(% colspan="4" style="background-color:#d9e2f3; color:#0070c0; width:423px" %)**Downlink Command to poll Open/Close status (0x31)**
548 |(% style="width:58px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:124px" %)**4bytes**|(% style="width:114px" %)**1byte**
549 |(% style="width:58px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:124px" %)Timestamp end|(% style="width:114px" %)Uplink Interval
550
551 (((
552 Timestamp start and Timestamp end-use Unix TimeStamp format as mentioned above. Devices will reply with all data logs during this period, using the uplink interval.
553 )))
554
555 (((
556 For example, downlink command [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/CPL01%20LoRaWAN%20Outdoor%20PulseContact%20%20Sensor%20Manual/WebHome/image-20220518162852-1.png?rev=1.1||alt="image-20220518162852-1.png"]]
557 )))
558
559 (((
560 Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
561 )))
562
563 (((
564 Uplink Internal =5s，means DDS20-LB will send one packet every 5s. range 5~~255s.
565 )))
566
567
568 == 2.7 Frequency Plans ==
569
570
571 The DDS20-LB uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.
572
573 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
574
575
576 = 3. Configure DDS20-LB =
577
578 == 3.1 Configure Methods ==
579
580
581 DDS20-LB supports below configure method:
582
583 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
584
585 * AT Command via UART Connection : See [[UART Connection>>http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]].
586
587 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
588
589
590 == 3.2 General Commands ==
591
592
593 These commands are to configure:
594
595 * General system settings like: uplink interval.
596
597 * LoRaWAN protocol & radio related command.
598
599 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
600
601 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
602
603
604 == 3.3 Commands special design for DDS20-LB ==
605
606
607 These commands only valid for DDS20-LB, as below:
608
609
610 === 3.3.1 Set Transmit Interval Time ===
611
612
613 (((
614 Feature: Change LoRaWAN End Node Transmit Interval.
615 )))
616
617 (((
618 (% style="color:blue" %)**AT Command: AT+TDC**
619 )))
620
621 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
622 |=(% style="width: 156px;background-color:#D9E2F3; color:#0070c0" %)**Command Example**|=(% style="width: 137px;background-color:#D9E2F3; color:#0070c0" %)**Function**|=(% style="background-color:#D9E2F3; color:#0070c0" %)**Response**
623 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
624 30000
625 OK
626 the interval is 30000ms = 30s
627 )))
628 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
629 OK
630 Set transmit interval to 60000ms = 60 seconds
631 )))
632
633 (((
634 (% style="color:blue" %)**Downlink Command: 0x01**
635 )))
636
637 (((
638 Format: Command Code (0x01) followed by 3 bytes time value.
639 )))
640
641 (((
642 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
643 )))
644
645 * (((
646 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
647 )))
648 * (((
649 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds 
650
651
652
653 )))
654
655 === 3.3.2 Set Interrupt Mode ===
656
657
658 Feature, Set Interrupt mode for PA8 of pin.
659
660 When AT+INTMOD=0 is set, PA8 is used as a digital input port.
661
662 (% style="color:blue" %)**AT Command: AT+INTMOD**
663
664 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
665 |=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 197px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 158px;background-color:#D9E2F3;color:#0070C0" %)**Response**
666 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
667 0
668 OK
669 the mode is 0 =Disable Interrupt
670 )))
671 |(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)(((
672 Set Transmit Interval
673 0. (Disable Interrupt),
674 ~1. (Trigger by rising and falling edge)
675 2. (Trigger by falling edge)
676 3. (Trigger by rising edge)
677 )))|(% style="width:157px" %)OK
678
679 (% style="color:blue" %)**Downlink Command: 0x06**
680
681 Format: Command Code (0x06) followed by 3 bytes.
682
683 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
684
685 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
686
687 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
688
689
690 = 4. Battery & Power Consumption =
691
692
693 DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
694
695 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
696
697
698 = 5. OTA Firmware update =
699
700
701 (% class="wikigeneratedid" %)
702 User can change firmware DDS20-LB to:
703
704 * Change Frequency band/ region.
705
706 * Update with new features.
707
708 * Fix bugs.
709
710 Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]**
711
712 Methods to Update Firmware:
713
714 * (Recommanded way) OTA firmware update via wireless:  **[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]**
715
716 * Update through UART TTL interface: **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**.
717
718
719 = 6. FAQ =
720
721 == 6.1  What is the frequency plan for DDS20-LB? ==
722
723
724 DDS20-LB use the same frequency as other Dragino products. User can see the detail from this link:  [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]
725
726
727 == 6.2  Can I use DDS20-LB in condensation environment? ==
728
729
730 DDS20-LB is not suitable to be used in condensation environment. Condensation on the DDS20-LB probe will affect the reading and always got 0.
731
732
733 = 7.  Trouble Shooting =
734
735 == 7.1  Why I can't join TTN V3 in US915 / AU915 bands? ==
736
737
738 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
739
740
741 == 7.2  AT Command input doesn't work ==
742
743
744 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:blue" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:blue" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
745
746
747 == 7.3  Why i always see 0x0000 or 0 for the distance value? ==
748
749
750 (((
751 LDDS20 has a strict [[**installation requirement**>>||anchor="H1.5A0InstallDDS20-LB"]]. Please make sure the installation method exactly follows up with the installation requirement. Otherwise, the reading might be always 0x00.
752
753 If you have followed the instruction requirement exactly but still see the 0x00 reading issue, please. please double-check the decoder, you can check the raw payload to verify.
754 )))
755
756
757 = 8. Order Info =
758
759
760 Part Number: (% style="color:blue" %)**DDS20-LB-XXX**
761
762 (% style="color:red" %)**XXX**(%%): **The default frequency band**
763
764 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
765
766 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
767
768 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
769
770 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
771
772 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
773
774 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
775
776 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
777
778 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
779
780
781 = 9. ​Packing Info =
782
783
784 (% style="color:#037691" %)**Package Includes**:
785
786 * DDS20-LB LoRaWAN Ultrasonic Liquid Level Sensor x 1
787
788 (% style="color:#037691" %)**Dimension and weight**:
789
790 * Device Size: cm
791
792 * Device Weight: g
793
794 * Package Size / pcs : cm
795
796 * Weight / pcs : g
797
798
799 = 10. Support =
800
801
802 * 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.
803
804 * 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.cc>>mailto:Support@dragino.cc]].