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Version 79.9 by Xiaoling on 2023/06/13 14:54
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1 (% style="text-align:center" %)
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 == 1.3 Specification ==
61
62
63 (% style="color:#037691" %)**Common DC Characteristics:**
64
65 * Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~~ 3.6v
66 * Operating Temperature: -40 ~~ 85°C
67
68 (% style="color:#037691" %)**LoRa Spec:**
69
70 * Frequency Range,  Band 1 (HF): 862 ~~ 1020 Mhz
71 * Max +22 dBm constant RF output vs.
72 * RX sensitivity: down to -139 dBm.
73 * Excellent blocking immunity
74
75 (% style="color:#037691" %)**Battery:**
76
77 * Li/SOCI2 un-chargeable battery
78 * Capacity: 8500mAh
79 * Self-Discharge: <1% / Year @ 25°C
80 * Max continuously current: 130mA
81 * Max boost current: 2A, 1 second
82
83 (% style="color:#037691" %)**Power Consumption**
84
85 * Sleep Mode: 5uA @ 3.3v
86 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
87
88 == 1.4 Suitable Container & Liquid ==
89
90
91 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
92 * Container shape is regular, and surface is smooth.
93 * Container Thickness:
94 ** Pure metal material.  2~~8mm, best is 3~~5mm
95 ** Pure non metal material: <10 mm
96 * Pure liquid without irregular deposition.(% style="display:none" %)
97
98 == 1.5 Install DDS20-LB ==
99
100
101 (% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
102
103 DDS20-LB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
104
105 [[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"]]
106
107
108 (((
109 (% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
110 )))
111
112 (((
113 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.
114 )))
115
116 [[image:image-20230613143052-5.png]]
117
118
119 No polish needed if the container is shine metal surface without paint or non-metal container.
120
121 [[image:image-20230613143125-6.png]]
122
123
124 (((
125 (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
126 )))
127
128 (((
129 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.
130 )))
131
132 (((
133 It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-LB won't detect the liquid level.
134 )))
135
136 (((
137 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.
138 )))
139
140
141 (((
142 (% style="color:red" %)**LED Status:**
143 )))
144
145 * (((
146 Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
147 )))
148
149 * (((
150 (% 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.
151 )))
152 * (((
153 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** slowly blinking**(%%): Sensor detects Liquid Level, The installation point is good.
154 )))
155
156 (((
157 LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
158 )))
159
160
161 (((
162 (% style="color:red" %)**Note 2:**
163 )))
164
165 (((
166 (% style="color:red" %)**Ultrasonic coupling paste** (%%) is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.
167 )))
168
169
170 (((
171 (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
172 )))
173
174 (((
175 Prepare Eproxy AB glue.
176 )))
177
178 (((
179 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
180 )))
181
182 (((
183 Reset DDS20-LB and see if the BLUE LED is slowly blinking.
184 )))
185
186 [[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"]]
187
188
189 (((
190 (% style="color:red" %)**Note 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.
191 )))
192
193 (((
194 (% style="color:red" %)**Note 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.
195 )))
196
197
198 == 1.6 Applications ==
199
200
201 * Smart liquid control solution.
202
203 * Smart liquefied gas solution.
204
205
206 == 1.7 Precautions ==
207
208
209 * 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.
210
211 * 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.
212
213 * 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.(% style="display:none" %)
214
215 == 1.8 Sleep mode and working mode ==
216
217
218 (% 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.
219
220 (% 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.
221
222
223 == 1.9 Button & LEDs ==
224
225
226 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
227
228
229 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
230 |=(% 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**
231 |(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
232 If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
233 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
234 )))
235 |(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
236 (% 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.
237 (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
238 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.
239 )))
240 |(% 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.
241
242 == 1.10 BLE connection ==
243
244
245 DDS20-LB support BLE remote configure.
246
247 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:
248
249 * Press button to send an uplink
250 * Press button to active device.
251 * Device Power on or reset.
252
253 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
254
255
256 == 1.11 Pin Definitions ==
257
258 [[image:image-20230523174230-1.png]]
259
260
261 == 1.12 Mechanical ==
262
263
264 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143884058-338.png]]
265
266
267 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143899218-599.png]]
268
269
270 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143909447-639.png]]
271
272
273 (% style="color:blue" %)**Probe Mechanical:**
274
275 [[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"]]
276
277
278 [[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"]]
279
280
281 = 2. Configure DDS20-LB to connect to LoRaWAN network =
282
283 == 2.1 How it works ==
284
285
286 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.
287
288 (% style="display:none" %) (%%)
289
290 == 2.2 ​Quick guide to connect to LoRaWAN server (OTAA) ==
291
292
293 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.
294
295 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.
296
297 [[image:image-20230613140140-4.png||height="453" width="800"]](% style="display:none" %)
298
299
300 (% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DDS20-LB.
301
302 Each DDS20-LB is shipped with a sticker with the default device EUI as below:
303
304 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]]
305
306
307 You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:
308
309
310 (% style="color:blue" %)**Register the device**
311
312 [[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"]]
313
314
315 (% style="color:blue" %)**Add APP EUI and DEV EUI**
316
317 [[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"]]
318
319
320 (% style="color:blue" %)**Add APP EUI in the application**
321
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-20220611161308-5.png?width=742&height=601&rev=1.1||alt="图片-20220611161308-5.png"]]
324
325
326 (% style="color:blue" %)**Add APP KEY**
327
328 [[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"]]
329
330
331 (% style="color:blue" %)**Step 2:**(%%) Activate on DDS20-LB
332
333
334 Press the button for 5 seconds to activate the DDS20-LB.
335
336 (% 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.
337
338 After join success, it will start to upload messages to TTN and you can see the messages in the panel.
339
340
341 == 2.3  ​Uplink Payload ==
342
343
344 (((
345 DDS20-LB will uplink payload via LoRaWAN with below payload format: 
346 )))
347
348 (((
349 Uplink payload includes in total 8 bytes.
350 )))
351
352 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
353 |=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)(((
354 **Size(bytes)**
355 )))|=(% 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**
356 |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
357 [[Distance>>||anchor="H2.3.2A0Distance"]]
358 (unit: mm)
359 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
360 [[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
361 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
362
363 [[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"]]
364
365
366 === 2.3.1  Battery Info ===
367
368
369 Check the battery voltage for DDS20-LB.
370
371 Ex1: 0x0B45 = 2885mV
372
373 Ex2: 0x0B49 = 2889mV
374
375
376 === 2.3.2  Distance ===
377
378
379 (((
380 Get the distance. Flat object range 20mm - 2000mm.
381 )))
382
383 (((
384 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" %)** **
385
386 (% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
387 )))
388
389 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
390 * If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
391
392 === 2.3.3  Interrupt Pin ===
393
394
395 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.
396
397 **Example:**
398
399 0x00: Normal uplink packet.
400
401 0x01: Interrupt Uplink Packet.
402
403
404 === 2.3.4  DS18B20 Temperature sensor ===
405
406
407 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
408
409 **Example**:
410
411 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
412
413 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
414
415
416 === 2.3.5  Sensor Flag ===
417
418
419 (((
420 0x01: Detect Ultrasonic Sensor
421 )))
422
423 (((
424 0x00: No Ultrasonic Sensor
425 )))
426
427
428 === 2.3.6  Decode payload in The Things Network ===
429
430
431 While using TTN network, you can add the payload format to decode the payload.
432
433 [[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"]]
434
435 The payload decoder function for TTN V3 is here:
436
437 (((
438 DDS20-LB TTN V3 Payload Decoder:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
439 )))
440
441
442 == 2.4  Uplink Interval ==
443
444
445 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"]]
446
447
448 == 2.5  ​Show Data in DataCake IoT Server ==
449
450
451 (((
452 [[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:
453 )))
454
455
456 (((
457 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
458 )))
459
460 (((
461 (% 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:**
462 )))
463
464
465 [[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"]]
466
467
468 [[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"]]
469
470
471 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
472
473 (% style="color:blue" %)**Step 4**(%%)**: Search the DDS20-LB and add DevEUI.**
474
475 [[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"]]
476
477
478 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
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/image-20220610165129-11.png?width=1088&height=595&rev=1.1||alt="image-20220610165129-11.png"]]
481
482
483
484 == 2.6 Datalog Feature ==
485
486
487 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.
488
489
490 === 2.6.1 Ways to get datalog via LoRaWAN ===
491
492
493 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.
494
495 * (((
496 a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
497 )))
498 * (((
499 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.
500 )))
501
502 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
503
504 [[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"]]
505
506
507 === 2.6.2 Unix TimeStamp ===
508
509
510 DDS20-LB uses Unix TimeStamp format based on
511
512 [[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"]]
513
514 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
515
516 Below is the converter example
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-20220523001219-12.png?width=720&height=298&rev=1.1||alt="图片-20220523001219-12.png" height="298" width="720"]]
519
520
521 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
522
523
524 === 2.6.3 Set Device Time ===
525
526
527 User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
528
529 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).
530
531 (% 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.**
532
533
534 === 2.6.4 Poll sensor value ===
535
536
537 Users can poll sensor values based on timestamps. Below is the downlink command.
538
539 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
540 |(% colspan="4" style="background-color:#d9e2f3; color:#0070c0; width:423px" %)**Downlink Command to poll Open/Close status (0x31)**
541 |(% style="width:58px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:124px" %)**4bytes**|(% style="width:114px" %)**1byte**
542 |(% style="width:58px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:124px" %)Timestamp end|(% style="width:114px" %)Uplink Interval
543
544 (((
545 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.
546 )))
547
548 (((
549 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"]]
550 )))
551
552 (((
553 Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
554 )))
555
556 (((
557 Uplink Internal =5s，means DDS20-LB will send one packet every 5s. range 5~~255s.
558 )))
559
560
561 == 2.7 Frequency Plans ==
562
563
564 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.
565
566 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
567
568
569 = 3. Configure DDS20-LB =
570
571 == 3.1 Configure Methods ==
572
573
574 DDS20-LB supports below configure method:
575
576 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
577
578 * 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]].
579
580 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
581
582 == 3.2 General Commands ==
583
584
585 These commands are to configure:
586
587 * General system settings like: uplink interval.
588
589 * LoRaWAN protocol & radio related command.
590
591 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
592
593 [[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/]]
594
595
596 == 3.3 Commands special design for DDS20-LB ==
597
598
599 These commands only valid for DDS20-LB, as below:
600
601
602 === 3.3.1 Set Transmit Interval Time ===
603
604
605 (((
606 Feature: Change LoRaWAN End Node Transmit Interval.
607 )))
608
609 (((
610 (% style="color:blue" %)**AT Command: AT+TDC**
611 )))
612
613 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
614 |=(% 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**
615 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
616 30000
617 OK
618 the interval is 30000ms = 30s
619 )))
620 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
621 OK
622 Set transmit interval to 60000ms = 60 seconds
623 )))
624
625 (((
626 (% style="color:blue" %)**Downlink Command: 0x01**
627 )))
628
629 (((
630 Format: Command Code (0x01) followed by 3 bytes time value.
631 )))
632
633 (((
634 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
635 )))
636
637 * (((
638 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
639 )))
640 * (((
641 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds 
642 )))
643
644 === 3.3.2 Set Interrupt Mode ===
645
646
647 Feature, Set Interrupt mode for PA8 of pin.
648
649 When AT+INTMOD=0 is set, PA8 is used as a digital input port.
650
651 (% style="color:blue" %)**AT Command: AT+INTMOD**
652
653 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
654 |=(% 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**
655 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
656 0
657 OK
658 the mode is 0 =Disable Interrupt
659 )))
660 |(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)(((
661 Set Transmit Interval
662 0. (Disable Interrupt),
663 ~1. (Trigger by rising and falling edge)
664 2. (Trigger by falling edge)
665 3. (Trigger by rising edge)
666 )))|(% style="width:157px" %)OK
667
668 (% style="color:blue" %)**Downlink Command: 0x06**
669
670 Format: Command Code (0x06) followed by 3 bytes.
671
672 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
673
674 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
675
676 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
677
678 = 4. Battery & Power Consumption =
679
680
681 DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
682
683 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
684
685
686 = 5. OTA Firmware update =
687
688
689 (% class="wikigeneratedid" %)
690 User can change firmware DDS20-LB to:
691
692 * Change Frequency band/ region.
693
694 * Update with new features.
695
696 * Fix bugs.
697
698 Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]**
699
700 Methods to Update Firmware:
701
702 * (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/]]
703
704 * 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]]**.
705
706 = 6. FAQ =
707
708 == 6.1  What is the frequency plan for DDS20-LB? ==
709
710
711 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"]]
712
713
714 == 6.2  Can I use DDS20-LB in condensation environment? ==
715
716
717 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.
718
719
720 = 7.  Trouble Shooting =
721
722 == 7.1  Why I can't join TTN V3 in US915 / AU915 bands? ==
723
724
725 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
726
727
728 == 7.2  AT Command input doesn't work ==
729
730
731 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.
732
733
734 == 7.3  Why i always see 0x0000 or 0 for the distance value? ==
735
736
737 (((
738 LDDS20 has a strict [[**installation requirement**>>||anchor="H1.5A0InstallLDDS20"]]. Please make sure the installation method exactly follows up with the installation requirement. Otherwise, the reading might be always 0x00.
739
740 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.
741 )))
742
743
744 = 8. Order Info =
745
746
747 Part Number: (% style="color:blue" %)**DDS20-LB-XXX**
748
749 (% style="color:red" %)**XXX**(%%): **The default frequency band**
750
751 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
752
753 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
754
755 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
756
757 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
758
759 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
760
761 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
762
763 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
764
765 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
766
767
768
769 = 9. ​Packing Info =
770
771
772 (% style="color:#037691" %)**Package Includes**:
773
774 * DDS20-LB LoRaWAN Ultrasonic Liquid Level Sensor x 1
775
776 (% style="color:#037691" %)**Dimension and weight**:
777
778 * Device Size: cm
779
780 * Device Weight: g
781
782 * Package Size / pcs : cm
783
784 * Weight / pcs : g
785
786
787
788 = 10. Support =
789
790
791 * 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.
792
793 * 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]].