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Version 79.15 by Xiaoling on 2023/06/13 15:23
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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
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 == 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:red" %)**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** (%%) 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 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.
192 )))
193
194 (((
195 (% 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.
196 )))
197
198
199 == 1.6 Applications ==
200
201
202 * Smart liquid control solution.
203
204 * Smart liquefied gas solution.
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
391 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
392
393 === 2.3.3  Interrupt Pin ===
394
395
396 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.
397
398 **Example:**
399
400 0x00: Normal uplink packet.
401
402 0x01: Interrupt Uplink Packet.
403
404
405 === 2.3.4  DS18B20 Temperature sensor ===
406
407
408 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
409
410 **Example**:
411
412 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
413
414 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
415
416
417 === 2.3.5  Sensor Flag ===
418
419
420 (((
421 0x01: Detect Ultrasonic Sensor
422 )))
423
424 (((
425 0x00: No Ultrasonic Sensor
426 )))
427
428
429 === 2.3.6  Decode payload in The Things Network ===
430
431
432 While using TTN network, you can add the payload format to decode the payload.
433
434 [[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"]]
435
436 The payload decoder function for TTN V3 is here:
437
438 (((
439 DDS20-LB TTN V3 Payload Decoder:  [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
440 )))
441
442
443 == 2.4  Uplink Interval ==
444
445
446 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"]]
447
448
449 == 2.5  ​Show Data in DataCake IoT Server ==
450
451
452 (((
453 [[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:
454 )))
455
456
457 (((
458 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**
459 )))
460
461 (((
462 (% 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:**
463 )))
464
465
466 [[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"]]
467
468
469 [[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"]]
470
471
472 (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
473
474 (% style="color:blue" %)**Step 4**(%%)**: Search the DDS20-LB and add DevEUI.**
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/1654851029373-510.png?rev=1.1||alt="1654851029373-510.png"]]
477
478
479 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
480
481 [[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"]]
482
483
484
485 == 2.6 Datalog Feature ==
486
487
488 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.
489
490
491 === 2.6.1 Ways to get datalog via LoRaWAN ===
492
493
494 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.
495
496 * (((
497 a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
498 )))
499 * (((
500 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.
501 )))
502
503 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
504
505 [[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"]]
506
507
508 === 2.6.2 Unix TimeStamp ===
509
510
511 DDS20-LB uses Unix TimeStamp format based on
512
513 [[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"]]
514
515 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
516
517 Below is the converter example
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-20220523001219-12.png?width=720&height=298&rev=1.1||alt="图片-20220523001219-12.png" height="298" width="720"]]
520
521
522 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
523
524
525 === 2.6.3 Set Device Time ===
526
527
528 User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command.
529
530 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).
531
532 (% 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.**
533
534
535 === 2.6.4 Poll sensor value ===
536
537
538 Users can poll sensor values based on timestamps. Below is the downlink command.
539
540 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
541 |(% colspan="4" style="background-color:#d9e2f3; color:#0070c0; width:423px" %)**Downlink Command to poll Open/Close status (0x31)**
542 |(% style="width:58px" %)**1byte**|(% style="width:127px" %)**4bytes**|(% style="width:124px" %)**4bytes**|(% style="width:114px" %)**1byte**
543 |(% style="width:58px" %)31|(% style="width:127px" %)Timestamp start|(% style="width:124px" %)Timestamp end|(% style="width:114px" %)Uplink Interval
544
545 (((
546 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.
547 )))
548
549 (((
550 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"]]
551 )))
552
553 (((
554 Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
555 )))
556
557 (((
558 Uplink Internal =5s，means DDS20-LB will send one packet every 5s. range 5~~255s.
559 )))
560
561
562 == 2.7 Frequency Plans ==
563
564
565 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.
566
567 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
568
569
570 = 3. Configure DDS20-LB =
571
572 == 3.1 Configure Methods ==
573
574
575 DDS20-LB supports below configure method:
576
577 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
578
579 * 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]].
580
581 * LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
582
583 == 3.2 General Commands ==
584
585
586 These commands are to configure:
587
588 * General system settings like: uplink interval.
589
590 * LoRaWAN protocol & radio related command.
591
592 They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
593
594 [[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/]]
595
596
597 == 3.3 Commands special design for DDS20-LB ==
598
599
600 These commands only valid for DDS20-LB, as below:
601
602
603 === 3.3.1 Set Transmit Interval Time ===
604
605
606 (((
607 Feature: Change LoRaWAN End Node Transmit Interval.
608 )))
609
610 (((
611 (% style="color:blue" %)**AT Command: AT+TDC**
612 )))
613
614 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
615 |=(% 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**
616 |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
617 30000
618 OK
619 the interval is 30000ms = 30s
620 )))
621 |(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((
622 OK
623 Set transmit interval to 60000ms = 60 seconds
624 )))
625
626 (((
627 (% style="color:blue" %)**Downlink Command: 0x01**
628 )))
629
630 (((
631 Format: Command Code (0x01) followed by 3 bytes time value.
632 )))
633
634 (((
635 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
636 )))
637
638 * (((
639 Example 1: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
640 )))
641 * (((
642 Example 2: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds 
643 )))
644
645 === 3.3.2 Set Interrupt Mode ===
646
647
648 Feature, Set Interrupt mode for PA8 of pin.
649
650 When AT+INTMOD=0 is set, PA8 is used as a digital input port.
651
652 (% style="color:blue" %)**AT Command: AT+INTMOD**
653
654 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
655 |=(% 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**
656 |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
657 0
658 OK
659 the mode is 0 =Disable Interrupt
660 )))
661 |(% style="width:154px" %)AT+INTMOD=2|(% style="width:196px" %)(((
662 Set Transmit Interval
663 0. (Disable Interrupt),
664 ~1. (Trigger by rising and falling edge)
665 2. (Trigger by falling edge)
666 3. (Trigger by rising edge)
667 )))|(% style="width:157px" %)OK
668
669 (% style="color:blue" %)**Downlink Command: 0x06**
670
671 Format: Command Code (0x06) followed by 3 bytes.
672
673 This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
674
675 * Example 1: Downlink Payload: 06000000  ~/~/  Turn off interrupt mode
676
677 * Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
678
679 = 4. Battery & Power Consumption =
680
681
682 DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
683
684 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
685
686
687 = 5. OTA Firmware update =
688
689
690 (% class="wikigeneratedid" %)
691 User can change firmware DDS20-LB to:
692
693 * Change Frequency band/ region.
694
695 * Update with new features.
696
697 * Fix bugs.
698
699 Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]**
700
701 Methods to Update Firmware:
702
703 * (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/]]**
704
705 * 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]]**.
706
707
708 = 6. FAQ =
709
710 == 6.1  What is the frequency plan for DDS20-LB? ==
711
712
713 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"]]
714
715
716 == 6.2  Can I use DDS20-LB in condensation environment? ==
717
718
719 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.
720
721
722 = 7.  Trouble Shooting =
723
724 == 7.1  Why I can't join TTN V3 in US915 / AU915 bands? ==
725
726
727 It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
728
729
730 == 7.2  AT Command input doesn't work ==
731
732
733 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.
734
735
736 == 7.3  Why i always see 0x0000 or 0 for the distance value? ==
737
738
739 (((
740 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.
741
742 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.
743 )))
744
745
746 = 8. Order Info =
747
748
749 Part Number: (% style="color:blue" %)**DDS20-LB-XXX**
750
751 (% style="color:red" %)**XXX**(%%): **The default frequency band**
752
753 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
754
755 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
756
757 * (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
758
759 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
760
761 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
762
763 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
764
765 * (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
766
767 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
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 = 10. Support =
787
788
789 * 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.
790
791 * 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]].