Wiki source code of DDS20-LB -- LoRaWAN Ultrasonic Liquid Level Sensor User Manual

Version 79.9 by Xiaoling on 2023/06/13 14:54

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26.1	1	(% style="text-align:center" %)
75.2	2	[[image:image-20230613133716-2.png\|\|height="717" width="717"]]
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31.2	11	Table of Contents：
30.1	12
1.1	13	{{toc/}}
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	19
31.1	20	= 1. Introduction =
1.1	21
75.4	22	== 1.1 What is LoRaWAN Ultrasonic liquid level Sensor ==
1.1	23
39.6	24
75.7	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.
1.1	26
75.6	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.
1.1	28
75.5	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.
1.1	30
75.3	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.
62.4	32
75.3	33	DDS20-LB (% style="color:blue" %)supports BLE configure(%%) and (% style="color:blue" %)wireless OTA update(%%) which make user easy to use.
1.1	34
75.3	35	DDS20-LB is powered by (% style="color:blue" %)8500mAh Li-SOCI2 battery(%%), it is designed for long term use up to 5 years.
1.1	36
75.3	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
77.2	39	[[image:image-20230613140115-3.png\|\|height="453" width="800"]]
1.1	40
64.2	41
1.1	42	== 1.2 Features ==
	43
39.6	44
1.1	45	* LoRaWAN 1.0.3 Class A
62.4	46	* Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
1.1	47	* Ultra-low power consumption
77.3	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)
70.5	52	* Cable Length : 25cm
1.1	53	* Support Bluetooth v5.1 and LoRaWAN remote configure
	54	* Support wireless OTA update firmware
70.5	55	* AT Commands to change parameters
1.1	56	* Downlink to change configure
70.5	57	* IP66 Waterproof Enclosure
1.1	58	* 8500mAh Battery for long term use
	59
	60	== 1.3 Specification ==
	61
	62
70.28	63	(% style="color:#037691" %)Common DC Characteristics:
70.6	64
70.28	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
77.4	88	== 1.4 Suitable Container & Liquid ==
70.28	89
70.6	90
77.4	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" %)
70.6	97
77.4	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
79.2	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"]]
77.4	106
	107
70.6	108	(((
77.4	109	(% style="color:blue" %)Step 2(%%): Polish the installation point.
	110	)))
70.6	111
77.4	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	)))
70.6	115
79.2	116	[[image:image-20230613143052-5.png]]
77.4	117
	118
	119	No polish needed if the container is shine metal surface without paint or non-metal container.
	120
79.2	121	[[image:image-20230613143125-6.png]]
77.4	122
	123
	124	(((
	125	(% style="color:blue" %)Step3: (%%)Test the installation point.
70.6	126	)))
	127
77.4	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	)))
1.1	131
77.4	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	)))
62.4	135
77.4	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	)))
70.6	139
	140
77.4	141	(((
	142	(% style="color:red" %)LED Status:
	143	)))
70.6	144
77.4	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
79.4	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"]]
77.4	187
	188
	189	(((
79.9	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.
77.4	191	)))
	192
	193	(((
79.9	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.
77.4	195	)))
	196
	197
70.28	198	== 1.6 Applications ==
70.6	199
	200
77.4	201	* Smart liquid control solution.
70.6	202
77.4	203	* Smart liquefied gas solution.
70.6	204
	205
77.4	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
1.1	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
77.4	223	== 1.9 Button & LEDs ==
1.1	224
	225
6.1	226	[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
1.1	227
	228
14.13	229	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
14.11	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
1.1	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	)))
6.1	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.
1.1	241
77.4	242	== 1.10 BLE connection ==
1.1	243
	244
79.2	245	DDS20-LB support BLE remote configure.
1.1	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
77.4	256	== 1.11 Pin Definitions ==
1.1	257
43.1	258	[[image:image-20230523174230-1.png]]
1.1	259
43.1	260
77.4	261	== 1.12 Mechanical ==
67.4	262
	263
6.1	264	[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143884058-338.png]]
1.1	265
	266
6.1	267	[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143899218-599.png]]
1.1	268
	269
6.1	270	[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143909447-639.png]]
1.1	271
	272
70.20	273	(% style="color:blue" %)Probe Mechanical:
70.10	274
79.2	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"]]
70.10	276
	277
79.2	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
77.5	281	= 2. Configure DDS20-LB to connect to LoRaWAN network =
67.4	282
1.1	283	== 2.1 How it works ==
	284
	285
79.6	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.
1.1	287
64.2	288	(% style="display:none" %) (%%)
1.1	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
62.5	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.
1.1	296
77.2	297	[[image:image-20230613140140-4.png\|\|height="453" width="800"]](% style="display:none" %)
1.1	298
64.2	299
79.6	300	(% style="color:blue" %)Step 1:(%%) Create a device in TTN with the OTAA keys from DDS20-LB.
1.1	301
79.6	302	Each DDS20-LB is shipped with a sticker with the default device EUI as below:
1.1	303
30.1	304	[[image:image-20230426084152-1.png\|\|alt="图片-20230426084152-1.png" height="233" width="502"]]
1.1	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
14.13	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"]]
1.1	313
	314
	315	(% style="color:blue" %)Add APP EUI and DEV EUI
	316
30.1	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"]]
1.1	318
	319
	320	(% style="color:blue" %)Add APP EUI in the application
	321
	322
30.1	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"]]
1.1	324
	325
	326	(% style="color:blue" %)Add APP KEY
	327
30.1	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"]]
1.1	329
	330
79.6	331	(% style="color:blue" %)Step 2:(%%) Activate on DDS20-LB
1.1	332
	333
79.6	334	Press the button for 5 seconds to activate the DDS20-LB.
6.1	335
1.1	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
70.10	341	== 2.3 Uplink Payload ==
1.1	342
	343
62.5	344	(((
79.6	345	DDS20-LB will uplink payload via LoRaWAN with below payload format:
62.5	346	)))
1.1	347
62.5	348	(((
70.21	349	Uplink payload includes in total 8 bytes.
62.5	350	)))
1.1	351
67.7	352	(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
70.10	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"]]
1.1	362
79.9	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"]]
1.1	364
	365
70.10	366	=== 2.3.1 Battery Info ===
1.1	367
	368
79.6	369	Check the battery voltage for DDS20-LB.
1.1	370
70.10	371	Ex1: 0x0B45 = 2885mV
1.1	372
70.10	373	Ex2: 0x0B49 = 2889mV
46.1	374
1.1	375
70.10	376	=== 2.3.2 Distance ===
67.7	377
	378
70.10	379	(((
79.9	380	Get the distance. Flat object range 20mm - 2000mm.
62.5	381	)))
1.1	382
62.5	383	(((
79.9	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" %)
14.22	385
79.9	386	(% style="color:blue" %)0605(H) = 1541 (D) = 1541 mm.
62.5	387	)))
1.1	388
70.10	389	* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
73.5	390	* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
67.7	391
70.10	392	=== 2.3.3 Interrupt Pin ===
67.7	393
10.1	394
70.22	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.
1.1	396
70.10	397	Example:
1.1	398
70.10	399	0x00: Normal uplink packet.
1.1	400
70.10	401	0x01: Interrupt Uplink Packet.
1.1	402
	403
70.10	404	=== 2.3.4 DS18B20 Temperature sensor ===
62.5	405
1.1	406
70.10	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.
1.1	408
70.10	409	Example:
1.1	410
70.10	411	If payload is: 0105H: (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
39.5	412
70.10	413	If payload is: FF3FH : (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
1.1	414
	415
70.10	416	=== 2.3.5 Sensor Flag ===
1.1	417
	418
55.1	419	(((
70.10	420	0x01: Detect Ultrasonic Sensor
55.1	421	)))
	422
	423	(((
70.10	424	0x00: No Ultrasonic Sensor
55.1	425	)))
46.1	426
	427
70.10	428	=== 2.3.6 Decode payload in The Things Network ===
1.1	429
55.1	430
70.10	431	While using TTN network, you can add the payload format to decode the payload.
1.1	432
70.10	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"]]
1.1	434
70.10	435	The payload decoder function for TTN V3 is here:
1.1	436
62.5	437	(((
79.6	438	DDS20-LB TTN V3 Payload Decoder: [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
62.5	439	)))
1.1	440
	441
70.10	442	== 2.4 Uplink Interval ==
1.1	443
	444
79.6	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"]]
1.1	446
70.10	447
	448	== 2.5 Show Data in DataCake IoT Server ==
	449
	450
62.5	451	(((
70.10	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:
62.5	453	)))
1.1	454
	455
62.5	456	(((
70.10	457	(% style="color:blue" %)Step 1(%%): Be sure that your device is programmed and properly connected to the network at this time.
62.5	458	)))
1.1	459
62.5	460	(((
70.10	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:
62.5	462	)))
14.26	463
55.1	464
70.10	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"]]
1.1	466
	467
70.10	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"]]
1.1	469
	470
70.10	471	(% style="color:blue" %)Step 3(%%): Create an account or log in Datacake.
1.1	472
79.6	473	(% style="color:blue" %)Step 4(%%): Search the DDS20-LB and add DevEUI.
1.1	474
70.10	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"]]
62.5	476
1.1	477
70.10	478	After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
1.1	479
70.10	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"]]
1.1	481
	482
	483
70.10	484	== 2.6 Datalog Feature ==
1.1	485
	486
79.6	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.
62.5	488
	489
70.10	490	=== 2.6.1 Ways to get datalog via LoRaWAN ===
62.5	491
	492
79.6	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.
62.5	494
	495	* (((
79.6	496	a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
62.5	497	)))
	498	* (((
79.6	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.
62.5	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
70.10	507	=== 2.6.2 Unix TimeStamp ===
62.5	508
	509
79.6	510	DDS20-LB uses Unix TimeStamp format based on
62.5	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
70.10	524	=== 2.6.3 Set Device Time ===
62.5	525
	526
	527	User need to set (% style="color:blue" %)SYNCMOD=1(%%) to enable sync time via MAC command.
	528
79.6	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).
62.5	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
70.10	534	=== 2.6.4 Poll sensor value ===
62.5	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	(((
64.8	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"]]
62.5	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	(((
79.6	557	Uplink Internal =5s，means DDS20-LB will send one packet every 5s. range 5~~255s.
62.5	558	)))
	559
	560
70.10	561	== 2.7 Frequency Plans ==
1.1	562
	563
79.6	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.
1.1	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
79.6	569	= 3. Configure DDS20-LB =
1.1	570
16.4	571	== 3.1 Configure Methods ==
1.1	572
	573
79.6	574	DDS20-LB supports below configure method:
1.1	575
	576	* AT Command via Bluetooth Connection (Recommended): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
67.20	577
11.1	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]].
67.20	579
1.1	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.
67.20	588
1.1	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
79.6	596	== 3.3 Commands special design for DDS20-LB ==
1.1	597
	598
79.6	599	These commands only valid for DDS20-LB, as below:
1.1	600
	601
	602	=== 3.3.1 Set Transmit Interval Time ===
	603
	604
62.5	605	(((
1.1	606	Feature: Change LoRaWAN End Node Transmit Interval.
62.5	607	)))
	608
	609	(((
1.1	610	(% style="color:blue" %)AT Command: AT+TDC
62.5	611	)))
1.1	612
14.34	613	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
62.5	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
1.1	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
62.5	625	(((
1.1	626	(% style="color:blue" %)Downlink Command: 0x01
62.5	627	)))
1.1	628
62.5	629	(((
1.1	630	Format: Command Code (0x01) followed by 3 bytes time value.
62.5	631	)))
1.1	632
62.5	633	(((
1.1	634	If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
62.5	635	)))
1.1	636
62.5	637	* (((
	638	Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	639	)))
	640	* (((
73.8	641	Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
73.7	642	)))
70.29	643
70.11	644	=== 3.3.2 Set Interrupt Mode ===
62.5	645
	646
43.1	647	Feature, Set Interrupt mode for PA8 of pin.
1.1	648
46.1	649	When AT+INTMOD=0 is set, PA8 is used as a digital input port.
	650
1.1	651	(% style="color:blue" %)AT Command: AT+INTMOD
	652
14.34	653	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
62.5	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
1.1	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
62.6	675
1.1	676	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
	677
16.4	678	= 4. Battery & Power Consumption =
14.45	679
1.1	680
79.6	681	DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
1.1	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
16.4	686	= 5. OTA Firmware update =
1.1	687
	688
13.1	689	(% class="wikigeneratedid" %)
79.6	690	User can change firmware DDS20-LB to:
1.1	691
13.1	692	* Change Frequency band/ region.
62.7	693
13.1	694	* Update with new features.
62.7	695
13.1	696	* Fix bugs.
1.1	697
79.6	698	Firmware and changelog can be downloaded from : [[Firmware download link>>url:https://www.dropbox.com/sh/ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]
1.1	699
31.1	700	Methods to Update Firmware:
1.1	701
70.18	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/]]
62.7	703
70.18	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]].
1.1	705
31.1	706	= 6. FAQ =
1.1	707
79.7	708	== 6.1 What is the frequency plan for DDS20-LB? ==
1.1	709
62.7	710
79.7	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"]]
62.7	712
1.1	713
79.7	714	== 6.2 Can I use DDS20-LB in condensation environment? ==
1.1	715
	716
79.7	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.
70.14	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
79.7	734	== 7.3 Why i always see 0x0000 or 0 for the distance value? ==
70.14	735
	736
79.7	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.
70.14	739
79.7	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	)))
70.14	742
	743
	744	= 8. Order Info =
	745
	746
79.7	747	Part Number: (% style="color:blue" %)DDS20-LB-XXX
70.14	748
70.12	749	(% style="color:red" %)XXX(%%): The default frequency band
1.1	750
38.1	751	* (% style="color:red" %)AS923(%%): LoRaWAN AS923 band
1.1	752
38.1	753	* (% style="color:red" %)AU915(%%): LoRaWAN AU915 band
1.1	754
38.1	755	* (% style="color:red" %)EU433(%%): LoRaWAN EU433 band
1.1	756
38.1	757	* (% style="color:red" %)EU868(%%): LoRaWAN EU868 band
1.1	758
38.1	759	* (% style="color:red" %)KR920(%%): LoRaWAN KR920 band
1.1	760
38.1	761	* (% style="color:red" %)US915(%%): LoRaWAN US915 band
1.1	762
38.1	763	* (% style="color:red" %)IN865(%%): LoRaWAN IN865 band
1.1	764
38.1	765	* (% style="color:red" %)CN470(%%): LoRaWAN CN470 band
1.1	766
79.8	767
	768
70.14	769	= 9. Packing Info =
67.11	770
	771
39.1	772	(% style="color:#037691" %)Package Includes:
1.1	773
79.7	774	* DDS20-LB LoRaWAN Ultrasonic Liquid Level Sensor x 1
1.1	775
39.1	776	(% style="color:#037691" %)Dimension and weight:
1.1	777
31.1	778	* Device Size: cm
1.1	779
31.1	780	* Device Weight: g
1.1	781
31.1	782	* Package Size / pcs : cm
1.1	783
31.1	784	* Weight / pcs : g
1.1	785
79.7	786
	787
70.14	788	= 10. Support =
	789
	790
31.1	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.
39.6	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]].

Wiki source code of DDS20-LB -- LoRaWAN Ultrasonic Liquid Level Sensor User Manual

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