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Version 79.19 by Xiaoling on 2023/06/13 15:52
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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
62 == 1.3 Specification ==
63
64
65 (% style="color:#037691" %)**Common DC Characteristics:**
66
67 * Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~~ 3.6v
68 * Operating Temperature: -40 ~~ 85°C
69
70 (% style="color:#037691" %)**LoRa Spec:**
71
72 * Frequency Range,  Band 1 (HF): 862 ~~ 1020 Mhz
73 * Max +22 dBm constant RF output vs.
74 * RX sensitivity: down to -139 dBm.
75 * Excellent blocking immunity
76
77 (% style="color:#037691" %)**Battery:**
78
79 * Li/SOCI2 un-chargeable battery
80 * Capacity: 8500mAh
81 * Self-Discharge: <1% / Year @ 25°C
82 * Max continuously current: 130mA
83 * Max boost current: 2A, 1 second
84
85 (% style="color:#037691" %)**Power Consumption**
86
87 * Sleep Mode: 5uA @ 3.3v
88 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
89
90
91
92 == 1.4 Suitable Container & Liquid ==
93
94
95 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
96 * Container shape is regular, and surface is smooth.
97 * Container Thickness:
98 ** Pure metal material.  2~~8mm, best is 3~~5mm
99 ** Pure non metal material: <10 mm
100 * Pure liquid without irregular deposition.
101
102
103
104 (% style="display:none" %)
105
106 == 1.5 Install DDS20-LB ==
107
108
109 (% style="color:blue" %)**Step 1**(%%):  ** Choose the installation point.**
110
111 DDS20-LB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
112
113 [[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"]]
114
115
116 (((
117 (% style="color:blue" %)**Step 2**(%%):  **Polish the installation point.**
118 )))
119
120 (((
121 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.
122 )))
123
124 [[image:image-20230613143052-5.png]]
125
126
127 No polish needed if the container is shine metal surface without paint or non-metal container.
128
129 [[image:image-20230613143125-6.png]]
130
131
132 (((
133 (% style="color:blue" %)**Step3:   **(%%)**Test the installation point.**
134 )))
135
136 (((
137 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.
138 )))
139
140 (((
141 It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-LB won't detect the liquid level.
142 )))
143
144 (((
145 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.
146 )))
147
148
149 (((
150 (% style="color:blue" %)**LED Status:**
151 )))
152
153 * (((
154 **Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
155 )))
156
157 * (((
158 (% 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.
159 )))
160 * (((
161 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** slowly blinking**(%%): Sensor detects Liquid Level, The installation point is good.
162 )))
163
164 (((
165 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
166 )))
167
168
169 (((
170 (% 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.
171 )))
172
173
174 (((
175 (% style="color:blue" %)**Step4:   **(%%)**Install use Epoxy ab glue.**
176 )))
177
178 (((
179 Prepare Eproxy AB glue.
180 )))
181
182 (((
183 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
184 )))
185
186 (((
187 Reset DDS20-LB and see if the BLUE LED is slowly blinking.
188 )))
189
190 [[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"]]
191
192
193 (((
194 (% style="color:red" %)**Note :**
195
196 (% 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.
197 )))
198
199 (((
200 (% 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.
201 )))
202
203
204 == 1.6 Applications ==
205
206
207 * Smart liquid control solution
208
209 * Smart liquefied gas solution
210
211
212
213 == 1.7 Precautions ==
214
215
216 * 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.
217
218 * 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.
219
220 * 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.
221
222
223 (% style="display:none" %)
224
225 == 1.8 Sleep mode and working mode ==
226
227
228 (% 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.
229
230 (% 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.
231
232
233 == 1.9 Button & LEDs ==
234
235
236 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
237
238
239 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
240 |=(% 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**
241 |(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
242 If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
243 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
244 )))
245 |(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
246 (% 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.
247 (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
248 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.
249 )))
250 |(% 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.
251
252
253
254 == 1.10 BLE connection ==
255
256
257 DDS20-LB support BLE remote configure.
258
259 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:
260
261 * Press button to send an uplink
262 * Press button to active device.
263 * Device Power on or reset.
264
265 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
266
267
268 == 1.11 Pin Definitions ==
269
270 [[image:image-20230523174230-1.png]]
271
272
273 == 1.12 Mechanical ==
274
275
276 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143884058-338.png]]
277
278
279 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143899218-599.png]]
280
281
282 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143909447-639.png]]
283
284
285 (% style="color:blue" %)**Probe Mechanical:**
286
287 [[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"]]
288
289
290 [[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"]]
291
292
293 = 2. Configure DDS20-LB to connect to LoRaWAN network =
294
295 == 2.1 How it works ==
296
297
298 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.
299
300 (% style="display:none" %) (%%)
301
302 == 2.2 ​Quick guide to connect to LoRaWAN server (OTAA) ==
303
304
305 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.
306
307 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.
308
309 [[image:image-20230613140140-4.png||height="453" width="800"]](% style="display:none" %)
310
311
312 (% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DDS20-LB.
313
314 Each DDS20-LB is shipped with a sticker with the default device EUI as below:
315
316 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
317
318
319 You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:
320
321
322 (% style="color:blue" %)**Register the device**
323
324 [[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"]]
325
326
327 (% style="color:blue" %)**Add APP EUI and DEV EUI**
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-20220611161308-4.png?width=753&height=551&rev=1.1||alt="图片-20220611161308-4.png"]]
330
331
332 (% style="color:blue" %)**Add APP EUI in the application**
333
334
335 [[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"]]
336
337
338 (% style="color:blue" %)**Add APP KEY**
339
340 [[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"]]
341
342
343 (% style="color:blue" %)**Step 2:**(%%) Activate on DDS20-LB
344
345
346 Press the button for 5 seconds to activate the DDS20-LB.
347
348 (% 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.
349
350 After join success, it will start to upload messages to TTN and you can see the messages in the panel.
351
352
353 == 2.3  ​Uplink Payload ==
354
355
356 (((
357 DDS20-LB will uplink payload via LoRaWAN with below payload format: 
358 )))
359
360 (((
361 Uplink payload includes in total 8 bytes.
362 )))
363
364 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
365 |=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)(((
366 **Size(bytes)**
367 )))|=(% 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**
368 |(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
369 [[Distance>>||anchor="H2.3.2A0Distance"]]
370 (unit: mm)
371 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
372 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
373 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
374
375 [[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"]]
376
377
378 === 2.3.1  Battery Info ===
379
380
381 Check the battery voltage for DDS20-LB.
382
383 Ex1: 0x0B45 = 2885mV
384
385 Ex2: 0x0B49 = 2889mV
386
387
388 === 2.3.2  Distance ===
389
390
391 (((
392 Get the distance. Flat object range 20mm - 2000mm.
393 )))
394
395 (((
396 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" %)** **
397
398 (% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
399 )))
400
401 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
402
403 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
404
405
406
407 === 2.3.3  Interrupt Pin ===
408
409
410 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.
411
412 **Example:**
413
414 0x00: Normal uplink packet.
415
416 0x01: Interrupt Uplink Packet.
417
418
419 === 2.3.4  DS18B20 Temperature sensor ===
420
421
422 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
423
424 **Example**:
425
426 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
427
428 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
429
430
431 === 2.3.5  Sensor Flag ===
432
433
434 (((
435 0x01: Detect Ultrasonic Sensor
436 )))
437
438 (((
439 0x00: No Ultrasonic Sensor
440 )))
441
442
443 === 2.3.6  Decode payload in The Things Network ===
444
445
446 While using TTN network, you can add the payload format to decode the payload.
447
448 [[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"]]
449
450 The payload decoder function for TTN V3 is here:
451
452 (((
453 DDS20-LB TTN V3 Payload Decoder:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
454 )))
455
456
457 == 2.4  Uplink Interval ==
458
459
460 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"]]
461
462
463 == 2.5  ​Show Data in DataCake IoT Server ==
464
465
466 (((
467 [[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:
468 )))
469
470
471 (((
472 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
473 )))
474
475 (((
476 (% 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:**
477 )))
478
479
480 [[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"]]
481
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/1654592800389-571.png?rev=1.1||alt="1654592800389-571.png"]]
484
485
486 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
487
488 (% style="color:blue" %)**Step 4**(%%)**: Search the DDS20-LB and add DevEUI.**
489
490 [[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"]]
491
492
493 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
494
495 [[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"]]
496
497
498 == 2.6 Datalog Feature ==
499
500
501 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.
502
503
504 === 2.6.1 Ways to get datalog via LoRaWAN ===
505
506
507 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.
508
509 * (((
510 a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
511 )))
512 * (((
513 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.
514 )))
515
516 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
517
518 [[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"]]
519
520
521 === 2.6.2 Unix TimeStamp ===
522
523
524 DDS20-LB uses Unix TimeStamp format based on
525
526 [[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"]]
527
528 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
529
530 Below is the converter example
531
532 [[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"]]
533
534
535 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
536
537
538 === 2.6.3 Set Device Time ===
539
540
541 User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
542
543 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).
544
545 (% 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.**
546
547
548 === 2.6.4 Poll sensor value ===
549
550
551 Users can poll sensor values based on timestamps. Below is the downlink command.
552
553 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
554 |(% colspan="4" style="background-color:#d9e2f3; color:#0070c0; width:423px" %)**Downlink Command to poll Open/Close status (0x31)**
555 |(% style="width:58px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:124px" %)**4bytes**|(% style="width:114px" %)**1byte**
556 |(% style="width:58px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:124px" %)Timestamp end|(% style="width:114px" %)Uplink Interval
557
558 (((
559 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.
560 )))
561
562 (((
563 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"]]
564 )))
565
566 (((
567 Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
568 )))
569
570 (((
571 Uplink Internal =5s，means DDS20-LB will send one packet every 5s. range 5~~255s.
572 )))
573
574
575 == 2.7 Frequency Plans ==
576
577
578 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.
579
580 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
581
582
583 = 3. Configure DDS20-LB =
584
585 == 3.1 Configure Methods ==
586
587
588 DDS20-LB supports below configure method:
589
590 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
591
592 * 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]].
593
594 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
595
596
597
598 == 3.2 General Commands ==
599
600
601 These commands are to configure:
602
603 * General system settings like: uplink interval.
604
605 * LoRaWAN protocol & radio related command.
606
607 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
608
609 [[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/]]
610
611
612 == 3.3 Commands special design for DDS20-LB ==
613
614
615 These commands only valid for DDS20-LB, as below:
616
617
618 === 3.3.1 Set Transmit Interval Time ===
619
620
621 (((
622 Feature: Change LoRaWAN End Node Transmit Interval.
623 )))
624
625 (((
626 (% style="color:blue" %)**AT Command: AT+TDC**
627 )))
628
629 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
630 |=(% 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**
631 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
632 30000
633 OK
634 the interval is 30000ms = 30s
635 )))
636 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
637 OK
638 Set transmit interval to 60000ms = 60 seconds
639 )))
640
641 (((
642 (% style="color:blue" %)**Downlink Command: 0x01**
643 )))
644
645 (((
646 Format: Command Code (0x01) followed by 3 bytes time value.
647 )))
648
649 (((
650 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
651 )))
652
653 * (((
654 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
655 )))
656 * (((
657 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds 
658
659
660
661 )))
662
663 === 3.3.2 Set Interrupt Mode ===
664
665
666 Feature, Set Interrupt mode for PA8 of pin.
667
668 When AT+INTMOD=0 is set, PA8 is used as a digital input port.
669
670 (% style="color:blue" %)**AT Command: AT+INTMOD**
671
672 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
673 |=(% 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**
674 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
675 0
676 OK
677 the mode is 0 =Disable Interrupt
678 )))
679 |(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)(((
680 Set Transmit Interval
681 0. (Disable Interrupt),
682 ~1. (Trigger by rising and falling edge)
683 2. (Trigger by falling edge)
684 3. (Trigger by rising edge)
685 )))|(% style="width:157px" %)OK
686
687 (% style="color:blue" %)**Downlink Command: 0x06**
688
689 Format: Command Code (0x06) followed by 3 bytes.
690
691 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
692
693 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
694
695 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
696
697
698
699 = 4. Battery & Power Consumption =
700
701
702 DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
703
704 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
705
706
707 = 5. OTA Firmware update =
708
709
710 (% class="wikigeneratedid" %)
711 User can change firmware DDS20-LB to:
712
713 * Change Frequency band/ region.
714
715 * Update with new features.
716
717 * Fix bugs.
718
719 Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]**
720
721 Methods to Update Firmware:
722
723 * (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/]]**
724
725 * 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]]**.
726
727
728
729 = 6. FAQ =
730
731 == 6.1  What is the frequency plan for DDS20-LB? ==
732
733
734 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"]]
735
736
737 == 6.2  Can I use DDS20-LB in condensation environment? ==
738
739
740 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.
741
742
743 = 7.  Trouble Shooting =
744
745 == 7.1  Why I can't join TTN V3 in US915 / AU915 bands? ==
746
747
748 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
749
750
751 == 7.2  AT Command input doesn't work ==
752
753
754 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.
755
756
757 == 7.3  Why i always see 0x0000 or 0 for the distance value? ==
758
759
760 (((
761 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.
762
763 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.
764 )))
765
766
767 = 8. Order Info =
768
769
770 Part Number: (% style="color:blue" %)**DDS20-LB-XXX**
771
772 (% style="color:red" %)**XXX**(%%): **The default frequency band**
773
774 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
775
776 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
777
778 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
779
780 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
781
782 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
783
784 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
785
786 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
787
788 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
789
790
791
792 = 9. ​Packing Info =
793
794
795 (% style="color:#037691" %)**Package Includes**:
796
797 * DDS20-LB LoRaWAN Ultrasonic Liquid Level Sensor x 1
798
799 (% style="color:#037691" %)**Dimension and weight**:
800
801 * Device Size: cm
802
803 * Device Weight: g
804
805 * Package Size / pcs : cm
806
807 * Weight / pcs : g
808
809
810
811 = 10. Support =
812
813
814 * 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.
815
816 * 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]].