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Title

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1		-DDS20-NB_NB-IoT_Ultrasonic_Liquid_Level_Sensor_User_Manual
	1	+DDS20-NB -- NB-IoT Ultrasonic Liquid Level Sensor User Manual

Content

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1	1	(% style="text-align:center" %)
2		-[[image:image-20230819102136-3.png]]
	2	+[[image:image-20230911134259-1.png||height="570" width="570"]]
3	3
4	4
5		-
6	6	**Table of Contents:**
7	7
8	8	{{toc/}}
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14	14
15	15	= 1. Introduction =
16	16
17		-== 1.1 What is S31x-NB NB-IoT Temperature & Humidity Sensor ==
	16	+== 1.1 What is DDS20-NB NB-IoT Ultrasonic liquid level Sensor ==
18	18
19	19
20		-The Dragino S31-NB and S31B-NB are (% style="color:blue" %)**NB-IoT Temperature and Humidity Sensor**(%%) for Internet of Things solution. It is used to measure the surrounding (% style="color:blue" %)**environment temperature and relative air humidity precisely**(%%), and then upload to IoT server via NB-IoT network*.
	19	+The Dragino DDS20-NB is a **NB-IoT Ultrasonic liquid level sensor** for Internet of Things solution. It uses **none-contact method **to measure the **height of liquid** in a container without opening the container, and send IoT platform via NB-IoT network.
21	21
22		-The temperature & humidity sensor used in S31-NB is SHT31, which is fully calibrated, linearized, and temperature compensated digital output from Sensirion, it provides a strong reliability and long-term stability. The SHT31 is fixed in a (% style="color:blue" %)**waterproof anti-condensation casing**(%%) for long term use.
	21	+The DDS20-NB 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.
23	23
24		-S31-NB supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP**(%%) for different application requirement. and Support Uplinks to various IoT Servers.
	23	+DDS20-NB uses **ultrasonic sensing technology** for distance measurement. DDS20-NB is of high accuracy to measure various liquid such as: **toxic substances**, **strong acids**, **strong alkalis** and **various pure liquids** in high-temperature and high-pressure airtight containers.
25	25
26		-S31-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to several years. (Real-world battery life depends on the use environment, update period and uplink method. Please check related Power Analyze report).
	25	+PS-NB-NA supports different uplink methods including **MQTT, MQTTs, UDP & TCP** for different application requirement, and support uplinks to various IoT Servers.
27	27
28		-*make sure you have NB-IoT coverage locally.
	27	+PS-NB-NA **supports BLE configure **and** OTA update** which make user easy to use.
29	29
	29	+PS-NB-NA is powered by **8500mAh Li-SOCI2 battery**, it is designed for long-term use up to severa years.
30	30
31		-[[image:1692411831805-116.png]]
	31	+PS-NB-NA has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
32	32
33	33
	34	+[[image:image-20230911140426-2.png||height="320" width="951"]]
	35	+
	36	+
34	34	== 1.2 ​Features ==
35	35
36	36
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46	46	* 8500mAh Battery for long term use
47	47	* Nano SIM card slot for NB-IoT SIM
48	48
49		-
50	50	== 1.3 Specification ==
51	51
52	52
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106	106	* STOP Mode: 10uA @ 3.3v
107	107	* Max transmit power: 350mA@3.3v
108	108
109		-
110	110	== 1.4 Applications ==
111	111
112	112
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117	117	* Smart Cities
118	118	* Smart Factory
119	119
120		-
121	121	== 1.5 Sleep mode and working mode ==
122	122
123	123
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145	145	)))
146	146	|(% 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.
147	147
148		-
149	149	== 1.7 BLE connection ==
150	150
151	151
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308	308
309	309	* Json entry 1 ~~ 8 are the last 1 ~~ 8 sampling data as specify by (% style="color:#037691" %)**AT+NOUD=8 ** (%%)Command. Each entry includes (from left to right): Temperature, Humidity, Sampling time.
310	310
311		-
312	312	=== 2.2.2 HEX format Payload(Type~=0) ===
313	313
314	314
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441	441
442	442	* If user only want to send only min or max, user can set the alarm to a value that device won’t reach. For example: (% style="color:#037691" %)**AT+SHTEMP=-80,0.**
443	443
444		-
445	445	== 2.6 Trggier an uplink by external interrupt ==
446	446
447	447
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459	459
460	460	* (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
461	461
462		-
463	463	= 3. Configure S31x-NB =
464	464
465	465	== 3.1 Configure Methods ==
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471	471
472	472	* 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]].
473	473
474		-
475	475	== 3.2 AT Commands Set ==
476	476
477	477
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577	577
578	578	* 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]]**.
579	579
580		-
581	581	= 6. FAQ =
582	582
583	583	== 6.1 How can I access t BC660K-GL AT Commands? ==
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621	621
622	622	* Weight / pcs : 180g
623	623
624		-
625	625	= 9. Support =
626	626
627	627

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	1	+XWiki.Xiaoling

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