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

Version 79.11 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.
79.11	390
79.10	391	* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
67.7	392
70.10	393	=== 2.3.3 Interrupt Pin ===
67.7	394
10.1	395
70.22	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.
1.1	397
70.10	398	Example:
1.1	399
70.10	400	0x00: Normal uplink packet.
1.1	401
70.10	402	0x01: Interrupt Uplink Packet.
1.1	403
	404
70.10	405	=== 2.3.4 DS18B20 Temperature sensor ===
62.5	406
1.1	407
70.10	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.
1.1	409
70.10	410	Example:
1.1	411
70.10	412	If payload is: 0105H: (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
39.5	413
70.10	414	If payload is: FF3FH : (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
1.1	415
	416
79.11	417
	418
70.10	419	=== 2.3.5 Sensor Flag ===
1.1	420
	421
55.1	422	(((
70.10	423	0x01: Detect Ultrasonic Sensor
55.1	424	)))
	425
	426	(((
70.10	427	0x00: No Ultrasonic Sensor
55.1	428	)))
46.1	429
	430
70.10	431	=== 2.3.6 Decode payload in The Things Network ===
1.1	432
55.1	433
70.10	434	While using TTN network, you can add the payload format to decode the payload.
1.1	435
70.10	436	[[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	437
70.10	438	The payload decoder function for TTN V3 is here:
1.1	439
62.5	440	(((
79.6	441	DDS20-LB TTN V3 Payload Decoder: [[ttps:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
62.5	442	)))
1.1	443
	444
70.10	445	== 2.4 Uplink Interval ==
1.1	446
	447
79.6	448	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	449
70.10	450
	451	== 2.5 Show Data in DataCake IoT Server ==
	452
	453
62.5	454	(((
70.10	455	[[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	456	)))
1.1	457
	458
62.5	459	(((
70.10	460	(% style="color:blue" %)Step 1(%%): Be sure that your device is programmed and properly connected to the network at this time.
62.5	461	)))
1.1	462
62.5	463	(((
70.10	464	(% 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	465	)))
14.26	466
55.1	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/1654592790040-760.png?rev=1.1\|\|alt="1654592790040-760.png"]]
1.1	469
	470
70.10	471	[[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	472
	473
70.10	474	(% style="color:blue" %)Step 3(%%): Create an account or log in Datacake.
1.1	475
79.6	476	(% style="color:blue" %)Step 4(%%): Search the DDS20-LB and add DevEUI.
1.1	477
70.10	478	[[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	479
1.1	480
70.10	481	After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.
1.1	482
70.10	483	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20220610165129-11.png?width=1088&height=595&rev=1.1\|\|alt="image-20220610165129-11.png"]]
1.1	484
	485
	486
70.10	487	== 2.6 Datalog Feature ==
1.1	488
	489
79.6	490	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	491
	492
70.10	493	=== 2.6.1 Ways to get datalog via LoRaWAN ===
62.5	494
	495
79.6	496	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	497
	498	* (((
79.6	499	a) DDS20-LB will do an ACK check for data records sending to make sure every data arrive server.
62.5	500	)))
	501	* (((
79.6	502	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	503	)))
	504
	505	Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
	506
	507	[[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"]]
	508
	509
70.10	510	=== 2.6.2 Unix TimeStamp ===
62.5	511
	512
79.6	513	DDS20-LB uses Unix TimeStamp format based on
62.5	514
	515	[[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"]]
	516
	517	User can get this time from link: [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
	518
	519	Below is the converter example
	520
	521	[[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"]]
	522
	523
	524	So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
	525
	526
70.10	527	=== 2.6.3 Set Device Time ===
62.5	528
	529
	530	User need to set (% style="color:blue" %)SYNCMOD=1(%%) to enable sync time via MAC command.
	531
79.6	532	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	533
	534	(% 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.
	535
	536
70.10	537	=== 2.6.4 Poll sensor value ===
62.5	538
	539
	540	Users can poll sensor values based on timestamps. Below is the downlink command.
	541
	542	(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:425.818px" %)
	543	\|(% colspan="4" style="background-color:#d9e2f3; color:#0070c0; width:423px" %)Downlink Command to poll Open/Close status (0x31)
	544	\|(% style="width:58px" %)1byte\|(% style="width:127px" %)4bytes\|(% style="width:124px" %)4bytes\|(% style="width:114px" %)1byte
	545	\|(% style="width:58px" %)31\|(% style="width:127px" %)Timestamp start\|(% style="width:124px" %)Timestamp end\|(% style="width:114px" %)Uplink Interval
	546
	547	(((
	548	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.
	549	)))
	550
	551	(((
64.8	552	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	553	)))
	554
	555	(((
	556	Is to check 2021/11/12 12:00:00 to 2021/11/12 15:00:00's data
	557	)))
	558
	559	(((
79.6	560	Uplink Internal =5s，means DDS20-LB will send one packet every 5s. range 5~~255s.
62.5	561	)))
	562
	563
70.10	564	== 2.7 Frequency Plans ==
1.1	565
	566
79.6	567	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	568
	569	[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]
	570
	571
79.6	572	= 3. Configure DDS20-LB =
1.1	573
16.4	574	== 3.1 Configure Methods ==
1.1	575
	576
79.6	577	DDS20-LB supports below configure method:
1.1	578
	579	* AT Command via Bluetooth Connection (Recommended): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
67.20	580
11.1	581	* 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	582
1.1	583	* LoRaWAN Downlink. Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
	584
	585	== 3.2 General Commands ==
	586
	587
	588	These commands are to configure:
	589
	590	* General system settings like: uplink interval.
67.20	591
1.1	592	* LoRaWAN protocol & radio related command.
	593
	594	They are same for all Dragino Devices which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:
	595
	596	[[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/]]
	597
	598
79.6	599	== 3.3 Commands special design for DDS20-LB ==
1.1	600
	601
79.6	602	These commands only valid for DDS20-LB, as below:
1.1	603
	604
	605	=== 3.3.1 Set Transmit Interval Time ===
	606
	607
62.5	608	(((
1.1	609	Feature: Change LoRaWAN End Node Transmit Interval.
62.5	610	)))
	611
	612	(((
1.1	613	(% style="color:blue" %)AT Command: AT+TDC
62.5	614	)))
1.1	615
14.34	616	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
62.5	617	\|=(% 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	618	\|(% style="width:156px" %)AT+TDC=?\|(% style="width:137px" %)Show current transmit Interval\|(((
	619	30000
	620	OK
	621	the interval is 30000ms = 30s
	622	)))
	623	\|(% style="width:156px" %)AT+TDC=60000\|(% style="width:137px" %)Set Transmit Interval\|(((
	624	OK
	625	Set transmit interval to 60000ms = 60 seconds
	626	)))
	627
62.5	628	(((
1.1	629	(% style="color:blue" %)Downlink Command: 0x01
62.5	630	)))
1.1	631
62.5	632	(((
1.1	633	Format: Command Code (0x01) followed by 3 bytes time value.
62.5	634	)))
1.1	635
62.5	636	(((
1.1	637	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	638	)))
1.1	639
62.5	640	* (((
	641	Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	642	)))
	643	* (((
73.8	644	Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
73.7	645	)))
70.29	646
70.11	647	=== 3.3.2 Set Interrupt Mode ===
62.5	648
	649
43.1	650	Feature, Set Interrupt mode for PA8 of pin.
1.1	651
46.1	652	When AT+INTMOD=0 is set, PA8 is used as a digital input port.
	653
1.1	654	(% style="color:blue" %)AT Command: AT+INTMOD
	655
14.34	656	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
62.5	657	\|=(% 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	658	\|(% style="width:154px" %)AT+INTMOD=?\|(% style="width:196px" %)Show current interrupt mode\|(% style="width:157px" %)(((
	659	0
	660	OK
	661	the mode is 0 =Disable Interrupt
	662	)))
	663	\|(% style="width:154px" %)AT+INTMOD=2\|(% style="width:196px" %)(((
	664	Set Transmit Interval
	665	0. (Disable Interrupt),
	666	~1. (Trigger by rising and falling edge)
	667	2. (Trigger by falling edge)
	668	3. (Trigger by rising edge)
	669	)))\|(% style="width:157px" %)OK
	670
	671	(% style="color:blue" %)Downlink Command: 0x06
	672
	673	Format: Command Code (0x06) followed by 3 bytes.
	674
	675	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
	676
	677	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
62.6	678
1.1	679	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
	680
16.4	681	= 4. Battery & Power Consumption =
14.45	682
1.1	683
79.6	684	DDS20-LB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
1.1	685
	686	[[Battery Info & Power Consumption Analyze>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
	687
	688
16.4	689	= 5. OTA Firmware update =
1.1	690
	691
13.1	692	(% class="wikigeneratedid" %)
79.6	693	User can change firmware DDS20-LB to:
1.1	694
13.1	695	* Change Frequency band/ region.
62.7	696
13.1	697	* Update with new features.
62.7	698
13.1	699	* Fix bugs.
1.1	700
79.6	701	Firmware and changelog can be downloaded from : [[Firmware download link>>url:https://www.dropbox.com/sh/ph4uyz0rchflrnw/AADr1f_5Sg30804NItpfOQbla?dl=0]]
1.1	702
31.1	703	Methods to Update Firmware:
1.1	704
70.18	705	* (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	706
70.18	707	* 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	708
31.1	709	= 6. FAQ =
1.1	710
79.7	711	== 6.1 What is the frequency plan for DDS20-LB? ==
1.1	712
62.7	713
79.7	714	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	715
1.1	716
79.7	717	== 6.2 Can I use DDS20-LB in condensation environment? ==
1.1	718
	719
79.7	720	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	721
	722
	723	= 7. Trouble Shooting =
	724
	725	== 7.1 Why I can't join TTN V3 in US915 / AU915 bands? ==
	726
	727
	728	It is due to channel mapping. Please see below link: [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome\|\|anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
	729
	730
	731	== 7.2 AT Command input doesn't work ==
	732
	733
	734	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.
	735
	736
79.7	737	== 7.3 Why i always see 0x0000 or 0 for the distance value? ==
70.14	738
	739
79.7	740	(((
	741	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	742
79.7	743	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.
	744	)))
70.14	745
	746
	747	= 8. Order Info =
	748
	749
79.7	750	Part Number: (% style="color:blue" %)DDS20-LB-XXX
70.14	751
70.12	752	(% style="color:red" %)XXX(%%): The default frequency band
1.1	753
38.1	754	* (% style="color:red" %)AS923(%%): LoRaWAN AS923 band
1.1	755
38.1	756	* (% style="color:red" %)AU915(%%): LoRaWAN AU915 band
1.1	757
38.1	758	* (% style="color:red" %)EU433(%%): LoRaWAN EU433 band
1.1	759
38.1	760	* (% style="color:red" %)EU868(%%): LoRaWAN EU868 band
1.1	761
38.1	762	* (% style="color:red" %)KR920(%%): LoRaWAN KR920 band
1.1	763
38.1	764	* (% style="color:red" %)US915(%%): LoRaWAN US915 band
1.1	765
38.1	766	* (% style="color:red" %)IN865(%%): LoRaWAN IN865 band
1.1	767
38.1	768	* (% style="color:red" %)CN470(%%): LoRaWAN CN470 band
1.1	769
79.8	770
	771
70.14	772	= 9. Packing Info =
67.11	773
	774
39.1	775	(% style="color:#037691" %)Package Includes:
1.1	776
79.7	777	* DDS20-LB LoRaWAN Ultrasonic Liquid Level Sensor x 1
1.1	778
39.1	779	(% style="color:#037691" %)Dimension and weight:
1.1	780
31.1	781	* Device Size: cm
1.1	782
31.1	783	* Device Weight: g
1.1	784
31.1	785	* Package Size / pcs : cm
1.1	786
31.1	787	* Weight / pcs : g
1.1	788
79.7	789
	790
70.14	791	= 10. Support =
	792
	793
31.1	794	* 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	795
	796	* 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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