Dragino DDS75-NB NB-IoT Distance Detection Sensor

Fa'amatalaga o oloa

Fa'amatalaga

• Uiga masani DC: NB-IoT Spec
• NB-IoT Module: BC660K-GL
• Vaega Lagolago:
  • B1 @H-FDD: 2100MHz
  • B2 @H-FDD: 1900MHz
  • B3 @H-FDD: 1800MHz
  • B4 @H-FDD: 2100MHz
  • B5 @H-FDD: 860MHz
  • B8 @H-FDD: 900MHz
  • B12 @H-FDD: 720MHz
  • B13 @H-FDD: 740MHz
  • B17 @H-FDD: 730MHz
  • B18 @H-FDD: 870MHz
  • B19 @H-FDD: 870MHz
  • B20 @H-FDD: 790MHz
  • B25 @H-FDD: 1900MHz
  • B28 @H-FDD: 750MHz
  • B66 @H-FDD: 2000MHz
  • B70 @H-FDD: 2000MHz
  • B85 @H-FDD: 700MHz
• ma'a: Li/SOCI2 unchargeable battery
  • Malosiaga: 8500mAh
  • Tu'u atu e le tagata lava ia:

Fa'atonuga o le Fa'aaogaina o Mea

Setting up the DDS75-NB NB-IoT Distance Detection Sensor

To set up the sensor, follow these steps:

1. Insert the SIM card (if not built-in).
2. Power on the sensor by pressing the power button.
3. Connect to the desired IoT platform using one of the supported uplink methods (MQTT, MQTTs, UDP, TCP).

Fuaga Mamao
The sensor will detect the distance between the measured object and itself automatically once set up.

Pulea maa
The sensor is powered by an 8500mAh Li-SOCI2 battery designed for long-term use. To maximize battery life:

• Aloese mai le soona sasaina o le maa.
• Totogi atoa le maa a'o le'i fa'aaoga muamua.
• Replace the battery when needed with a compatible battery type.

Faʻalauiloa Firmware
The sensor supports BLE configure and OTA update for easy firmware updates. Follow these steps to update the firmware:

1. Ensure the sensor is connected to a stable network.
2. Initiate the firmware update process through the IoT platform or BLE connection.
3. Monitor the update progress and ensure it completes successfully.

Folasaga

What is DDS75-NB NB-IoT Distance Detection Sensor
The Dragino DDS75-NB is a NB-IoT Distance Detection Sensor for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses ultrasonic sensing technology for distance measurement, and temperature compensation is performed internally to improve the reliability of data. The DDS75-NB can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control,sewer, bottom water level monitoring, etc.

It detects the distance between the measured object and the sensor, and and send IoT platform via NB-IoT network.

• DDS75-NB supports different uplink methods including MQTT, MQTTs, UDP & TCP for different application requirement, and support uplinks to various IoT Servers.
• DDS75-NB supports BLE configure and OTA update which make user easy to use.
• DDS75-NB is powered by 8500mAh Li-SOCI2 battery, it is designed for long-term use up to several years.
• DDS75-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.

Vaega

• NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
• Ultra-maualalo le faaaogaina o le mana
• Su'esu'ega mamao e ala i tekinolosi Ultrasonic
• Va'aiga mea mafolafola 280mm - 7500mm
• Sa'o: ±(1cm+S*0.3%) (S: Mamao)
• Measure Angle: 40°
• Faatele Sampling ma le tasi uplink
• Support Bluetooth v5.1 remote configure and update firmware
• Uplink i lea taimi i lea taimi
• Downlink e sui le configure
• IP66 Suavai Pa
• 8500mAh Battery mo le faʻaaogaina umi
• Nano SIM card slot mo NB-IoT SIM

Fa'amatalaga

Uiga masani DC:

• Sapalai Voltagu: 2.5v ~ 3.6v
• Galulue Vevela: -40 ~ 85°C

NB-IoT Fa'amatalaga:
NB-IoT Module: BC660K-GL

Vaega Lagolago:

• B1 @H-FDD: 2100MHz
• B2 @H-FDD: 1900MHz
• B3 @H-FDD: 1800MHz
• B4 @H-FDD: 2100MHz
• B5 @H-FDD: 860MHz
• B8 @H-FDD: 900MHz
• B12 @H-FDD: 720MHz
• B13 @H-FDD: 740MHz
• B17 @H-FDD: 730MHz
• B18 @H-FDD: 870MHz
• B19 @H-FDD: 870MHz
• B20 @H-FDD: 790MHz
• B25 @H-FDD: 1900MHz
• B28 @H-FDD: 750MHz
• B66 @H-FDD: 2000MHz
• B70 @H-FDD: 2000MHz
• B85 @H-FDD: 700MHz

ma'a:

• Li/SOCI2 ma'a e le mafai ona totogi
• Malosiaga: 8500mAh
• La'u Lafoa'i: <1% / Tausaga @ 25°C
• Max fa'aauau pea: 130mA
• Fa'ateleina le malosi o lo'o iai nei: 2A, 1 sekone

Fa'aaogāga Malosiaga

• TOTO ala: 10uA @ 3.3v
• Malosi'i fa'asalalau le mana: 350mA@3.3v

Tulaga tau le siosiomaga

Aitema	Tau maualalo	masani taua	Tau aupito maualuga	Vaega	Fa'amatalaga
Teuga vevela	-25	25	80	℃
Teuga susu		65%	90%	RH	(1)
O le vevela o galuega	-15	25	60	℃
Susū galue		65%	80%	RH	(1)

Remarks: (1)

• A oʻo i le 0-39 ℃ le vevela o le ambient, o le maualuga o le susu e 90% (e le faʻafefe);
• Pe a oʻo i le 40-50 ℃ le vevela o le ambient, o le maualuga maualuga o le susu o le maualuga lea o le susu i le lalolagi masani i le vevela o loʻo i ai nei (leai se condensation)

Ole fua ole fua Fa'asinomaga mamanu ave

1. O le mea fa'ata'ita'i o se paipa pa'epa'e pa'epa'e faia i le PVC, ma le maualuga o le 100cm ma le lautele o le 7.5cm.
2. O le mea e faʻataʻitaʻiina o se "pusa pepa faʻapipiʻi" e faʻatatau i le ogatotonu o le 0 °, ma le umi * lautele o le 60cm * 50cm.

Talosaga

• Fuaina o le mamao faalava
• Su'ega maualuga o le sua
• Faiga fa'afoega o paka
• Fa'alatalata mea ma su'esu'eina o iai
• Faiga fa'atonutonuina o pusa lapisi atamai
• Fa'alavelave fa'alavelave robot
• Pulea otometi
• Alavai
• Mata'ituina le maualuga o le vai i lalo

Tulaga moe ma faiga galue

Faiga moe loloto: Sensor doesn’t have any NB-IoT activate. This mode is used for storage and shipping to save battery life

Auala galue: In this mode, Sensor will work as NB-IoT Sensor to Join NB-IoT network and send out sensor data to server. Between each sampling/tx/rx i lea taimi ma lea taimi, o le leo o le a i le IDLE mode), i le IDLE mode, sensor e tutusa le mana faʻaaogaina ma le Deep Sleep mode.

Ki & LED

Behavior on ACT	Galuega	Gaioiga
	Send an uplink	If sensor has already attached to NB-IoT network, sensor will send an uplink packet, lanumoana ta'ita'i o le a emo tasi. Meanwhile, BLE module will be active and user can connect via BLE to configure device.
	Mea faigaluega	Green ta'ita'i o le a vave emo 5 taimi, o le a ulufale le masini OTA faiga for 3 seconds. And then start to attach NB-IoT network. Once sensor is active, BLE module will be ac- tive and user can connect via BLE to configure device, no matter if device attach NB-IoT net- work or not.

Deactivate Device

Moli taitaiina will solid on for 5 seconds. Means de- vice is in Deep Sleep Mode.

Fa'aaliga: A fa'atino e le masini se polokalame, e ono le aoga fa'amau. E sili ona oomi fa'amau pe a mae'a le fa'atinoina o le polokalame.

feso'ota'iga BLE
DDS75-NB support BLE remote configure and firmware update.

BLE e mafai ona faʻaogaina e faʻapipiʻi ai le parakalafa o le masini poʻo le vaʻai i le faʻamafanafanaga mai le masini. BLE o le a na'o le fa'agaoioia i lalo ifo:

• Oomi le faamau e lafo ai se uplink
• Oomi le faamau i le masini gaioi.
• Fa'aola le masini pe toe setiina.

Afai e leai se feso'ota'iga gaioiga ile BLE ile 60 sekone, ole a tapuni e le masini le module BLE e ulufale ai i le tulaga maualalo le mana.

Fa'amatalaga Pin, Suiga & Fa'atonu SIM

Fa'aoso JP2
Malosi i le masini pe a tu'u le osooso.

FA'AVAE FA'AVAE / SW1

1. ISP: fa'aleleia faiga, e leai se fa'ailo o le masini i lenei faiga. ae sauni mo le faʻaleleia o firmware. E le aoga le LED. O le firmware e le mafai.
2. moli: faiga galue, amata galue le masini ma auina atu faamafanafanaga galuega mo nisi debug

Toe Seti ki
Oomi e toe fa'afou le masini.

Fa'atonuga kata SIM
See this link. How to insert SIM Card .

Fa'ainisinia

Fa'ainisinia su'esu'e:

Use DDS75-NB to communicate with IoT Server

Auina atu faʻamatalaga ile IoT server e ala ile NB-IoT network
The DDS75-NB is equipped with a NB-IoT module, the pre-loaded firmware in DDS75-NB will get environment data from sensors and send the value to local NB-IoT network via the NB-IoT module. The NB-IoT network will forward this value to IoT server via the protocol defined by DDS75-NB.

O lo'o fa'aalia i lalo le fausaga o feso'ota'iga:
There are two version: -GE and -1T version of DDS75-NB.

GE Version: This version doesn’t include SIM card or point to any IoT server. User needs to use AT Commands to configure below two steps to set DDS75-NB send data to IoT server.
Install NB-IoT SIM card and configure APN. See instruction of Attach Network .

Set up sensor to point to IoT Server. See instruction of Configure to Connect Different Servers . Below shows result of different server as a glance.

1T Version: This version has 1NCE SIM card pre-installed and configure to send value to ThingsEye. User Just need to select the sensor type in ThingsEyeand Activate DDS75-NB and user will be able to see data in ThingsEye. See here for ThingsEye Config Instruction .

Ituaiga Totogi
To meet different server requirement, DDS75-NB supports different payload type.

E aofia ai:

• Totogi fa'atulagaina lautele JSON. (ituaiga=5)
• HEX fa'atulagaina Totogi. (ituaiga=0)
• Fa'asologa o le ThingSpeak. (ituaiga=1)
• Mea laupapa Fa'atulagaina. (ituaiga=3)

E mafai e le tagata faʻaoga ona faʻamaonia le ituaiga o totogi pe a filifilia le fesoʻotaʻiga protocol. ExampLe:

• AT+PRO=1,0 // Use COAP Connection & hex Payload
• AT+PRO=1,5 // Use COAP Connection & Json Payload
• AT+PRO=2,0 // Fa'aoga UDP Feso'ota'iga & Hex Payload
• AT+PRO=2,5 // Fa'aoga UDP Feso'ota'iga & Json Payload
• AT+PRO=3,0 // Fa'aoga le MQTT Connection & hex Payload
• AT+PRO=3,5 // Fa'aoga le MQTT Connection & Json Payload
• AT+PRO=4,0 // Fa'aoga le TCP Connection & hex Payload
• AT+PRO=4,5 // Fa'aoga le TCP Connection & Json Payload

General Json Format(Type=5)

This is the General Json Format. As below:

{“IMEI”:”863663062798914″,”IMSI”:”460083513507314″,”Model”:”DDS75-NB”,”distance”:1752,”interrupt”:0,”interrupt_level”:0,”battery”:3.29,”signal”:17,”time”:”2024/11/21 08:31:30″,”1″:[2109,”2024/11/21 08:04:46″],”2″:[1015,”2024/11/21 07:49:45″],”3″:[1118,”2024/11/21 07:34:46″],”4″:[0,”2024/11/21 05:26:12″],”5″:[0,”2024/11/21 05:11:12″],”6″:[0,”2024/11/21 04:56:12″],”7″: [0,”2024/11/21 04:41:12″],”8″:[0,”2024/11/21 04:26:12″]}

Fa'aaliga, mai luga ole uta:
Distance , Battery, Signal & time are the value at uplink time.
Json ulufale 1 ~ 8 o le mulimuli 1 ~ 8 sampling data as specify by AT+CLOCKLOG=1,65535,15,8 Command. Each entry includes (from left to right): Temperature,Humidity, Samptaimi umi.

Totogi fa'atulagaina o le HEX(ituaiga=0)

This is the HEX Format. As below: f863663062798914f46008351350731409820ce81101000008d1673ef0a1083d673ee99e03f7673ee619045e673e

Afai matou te faʻaogaina le MQTT client e lesitala i lenei autu MQTT, e mafai ona matou vaʻai i faʻamatalaga nei pe a faʻapipiʻi faʻamatalaga NB sensor.

Device ID(f+IMEI): f863663062798914 = 863663062798914
SIM Card ID(f+IMSI): f460083513507314 = 460083513507314

Fa'aliliuga:
O nei paita e aofia ai masini ma polokalama faakomepiuta.
Higher byte: Specify Sensor Model: 0x09 for DDS75-NB
Lower byte: Specify the software version: 0x82=130, means firmware version 1.3.0

BAT (Fa'amatalaga maa):
Ex1: 0x0D38 = 3384mV

Malosi o faailo:
NB-IoT Network signal Malosi.

Ex1: 0x13 = 19

• 0 -113dBm or less 1 -111dBm
• 2…30 -109dBm… -53dBm
• 31 -51dBm pe sili atu
• 99 Le iloa pe le iloa

Fa'alavelave:
If this packet is generated by interrupt or not.

ExampLe:

• 0x00: pusa uplink masani.
• 0x01: Fa'alavelave le Uplink Packet.

Interrupt_level:
This byte shows whether the interrupt is triggered by a high or low level.

• Ex1: 0x00 Interrupt triggered by falling edge (low level)
• Ex2: 0x01 Interrupt triggered by rising edge (high level)

Mamao:
Maua le mamao. Va'aiga mea mafolafola 280mm - 7500mm.
Mo example, afai o faʻamatalaga e te maua mai le resitala o le 0x0B 0x05, o le mamao i le va o le masini ma le mea fuaina o le.
0B05(H) = 2821 (D) = 2821 mm.
Afai o le tau o le sensor e 0x0000, o lona uiga e le iloa e le masini le masini ultrasonic.

Taimi talafeagaiamp:
Unit Timestamp Example: 6653ddb4(H) = 1716772276(D)
Tuu le tau decimal i totonu o le sootaga lea(https://www.epochconverter.com) ) to get the time.

Meatotogi Totogi (Type=3)
Type3 payload special design for ThingsBoard, it will also configure other default server to ThingsBoard.
{
“topic”: “2276492”,
“totogi”: {
“IMEI”: “863663062798914”,
“Model”: “DDS75-NB”,
“distance”: 347,
“interrupt”: 0,
“interrupt_level”: 0,
“maa”: 3.38,
“signal”: 15,
“1”: [347, “2024/05/27 01:26:21”],
“2”: [250, “2024/05/27 00:57:17”],
“3”: [250, “2024/05/27 00:42:17”],
“4”: [250, “2024/05/27 00:27:17”],
“5”: [250, “2024/05/27 00:12:17”],
“6”: [250, “2024/05/26 23:57:17”],
“7”: [250, “2024/05/26 23:42:17”],
“8”: [250, “2024/05/26 23:27:16”] }
}

ThingSpeak Totogi (Type=1)

This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~3 are:
Distance, Battery & Signal. This payload type only valid for ThingsSpeak Platform.

E pei o lalo:
field1=Distance value&field2=Battery value&field3=Signal value

Su'ega Uplink ma Suiga Fa'afou Vaeluaga

By default, Sensor will send uplinks every 2 hours
User can use below commands to change the uplink interval.

AT command: AT+TDC

• Example: AT+TDC=7200 // Set Update Interval to 7200 seconds
• Downlink command: 0x01
• Fa'asologa: Code Code (0x01) sosoo ai ma le 3 bytes.
• Example: 12 hours= 43200 seconds 43200(D)=0xA8C0(H)
• Downlink Payload: 01 00 A8 C0 // AT+TDC=43200, Set Update Interval to 12 hours.

Fa'aaliga: E mafai fo'i e le tagata fa'aoga ona tulei le ki mo le sili atu i le 1 sekone e fa'agaoioi ai se uplink.

Tele-Samplings and One uplink

Fa'aaliga: The AT+NOUD feature is upgraded to Clock Logging, please refer Clock Logging Feature
To save battery life, DDS75-NB will sample distance data every 15 minutes and send one uplink every 2 hours.

So each uplink it will include 8 stored data + 1 real-time data. They are defined by:

• AT+TR=900 // O le iunite o sekone, ma o le faaletonu o le faʻamaumau faʻamaumauga i le 900 sekone (15 minute, e mafai ona seti le laʻititi i le 180 sekone)
• AT + NOUD = 8 // O le masini e tuʻuina atu seti 8 o faʻamaumauga faʻamaumauga e ala i le le mafai. E oʻo atu i le 32 seti o faʻamaumauga faʻamaumauga e mafai ona faʻapipiʻiina.

O le ata o loʻo i lalo o loʻo faʻamatala manino atili ai le va o TR, NOUD, ma TDC:

Trggier se uplink e ala i fafo fa'alavelave
DDS75-NB has an external trigger interrupt function. Users can use the GPIO_EXTI pin to trigger the upload of data packets.

AT poloaiga:

• AT+INTMOD // Seti le faiga fa'alavelave fa'aoso
• AT+INTMOD=0 // Disable Interrupt
• AT+INTMOD=1 // Fa'aoso i luga ma pa'u pito
• AT+INTMOD=2 // Fa'aoso ile pito pa'u
• AT+INTMOD=3 // Fa'aoso e ala i luga

Alaala Mamao

Vaega: Set alarm of LDDS and NMDS.
AT command: AT+LDDSALARM (Range:280mm – 7500mm)

ExampLe: AT+LDDSALARM=500,2000 // Set the alarm threshold
Downlink command: 0X08
Fa'asologa: Code Code (0x08) sosoo ai ma le 4 bytes.
Example: Downlink Payload: 08 01 F4 07 D0 //AT+LDDSALARM=500,2000

Fa'ailoga uati (Talu mai le firmware version v1.2.1)
O nisi taimi pe a matou faʻapipiʻiina le tele o nodes pito i totonu o le fanua. Matou te mananaʻo uma sensors sample data at the same time, and upload these data together for analyze. In such case, we can use clock loging feature.
We can use this command to set the start time of data recording and the time interval to meet the requirements of the specific collection time of data.

AT command: AT+CLOCKLOG=a,b,c,d

• a: 0: Fa'agata le logging uati. 1: Fa'agaoioi le Uati Logging
• e: Fa'ailoa Muamua sampamata lona lua: va'aiga (0 ~ 3599, 65535) // Fa'amatalaga: Afai e seti le parakalafa b i le 65535, o le vaitaimi o le ogalaau e amata pe a uma ona maua e le node le feso'ota'iga ma lafo atu pepa.
• c: Fa'ailoa mai le sampva'ava'a: va'aiga (0 ~ 255 minute)
• o: E fia fa'amauina e tatau ona fa'apipi'i i luga o TDC uma (max 32)

Fa'aaliga: To disable clock recording, set the following parameters: AT+CLOCKLOG=1,65535,0,0

ExampLe: AT +CLOCKLOG=1,0,15,8
Device will log data to memory start from the 0* second (11:00 00″ of first hour and then sampling and log every 15 minutes.Every TDC uplink, the uplink payload will consist: Battery info + last 8 memory record with timestamp + sample i luga ole taimi). Va'ai i lalo mo le example.

I+TULAFONO UTI=1,65535,1,5
A maeʻa ona tuʻuina atu e le node le pepa muamua, e faʻamaumau faʻamaumauga i le mafaufau i vaeluaga o le 1 minute. Mo TDC uplink ta'itasi, o le uta uplink o le a aofia ai: fa'amatalaga maa + fa'amaumauga mulimuli e 5 manatua (totogi + taimiamp).

Fa'aaliga: Users need to synchronize the server time before configuring this command. If the server time is not synchronized before this command is configured, the command takes effect only after the node is reset.

• Downlink command: 0x0A

Fa'asologa: Code Code (0x0A) sosoo ai ma le 5 bytes.

• Example 1: Downlink Payload: 0A01FFFF0F08
  // Set SHT record time: AT+CLOCKLOG=1,65535,15,8
• Example 1: Downlink Payload: 0A0104B00F08
  // Set SHT record time:
  I+TULAFONO UTI=1,1200,15,8

Fa'aaliga: When entering the downlink payload, there must be no Spaces between bytes.

Example Query na fa'asaoina tala fa'asolopito

• AT poloaiga: AT+CDP

O lenei poloaiga e mafai ona faʻaaogaina e suʻe ai le talafaasolopito faʻasaoina, faʻamauina e oʻo atu i le 32 vaega o faʻamaumauga, o vaega taʻitasi o faʻamaumauga faʻasolopito e aofia ai le maualuga ole 100 bytes.

Uplink log fesili

• AT poloaiga: AT+GETLOG

E mafai ona fa'aoga lenei fa'atonuga e su'e ai ogalaau i luga o fa'amaumauga o fa'amaumauga.

Fa'atonuga ole igoa ole igoa ole igoa
This command is used to set up scheduled domain name resolution.

AT poloaiga:

• AT+DNSTIMER=XX // Unit: itula

A maeʻa ona faʻatulagaina lenei faʻatonuga, o le a faʻatinoina faʻatasi le faʻaiʻuga o igoa ole igoa.

Set the QoS level
This command is used to set the QoS level of MQTT.

AT poloaiga:

• AT+MQOS=xx // 0~2

Downlink command: 0x07

• Fa'asologa: Command Code (0x07) followed by 1 byte.
• Ex1: Downlink payload: 0x0700 //AT+MQOS=0
• Ex2: Downlink payload: 0x0701 //AT+MQOS=1

Set CoAP option
This command sets the connection parameters of the COAP.

AT poloaiga:

• AT+URI1 // CoAP option name, CoAP option length, “CoAP option value”
• AT+URI2 // CoAP option name, CoAP option length, “CoAP option value”
• AT+URI3 // CoAP option name, CoAP option length, “CoAP option value”
• AT+URI4 // CoAP option name, CoAP option length, “CoAP option value”

ExampLe:

• AT+URI1=11,38,”i/faaa241f-af4a-b780-4468-c671bb574858″

Set the downlink debugging mode(Since firmware v1.3.0)
Vaega: Set the conversion between the standard version and 1T version downlinks.

AT poloaiga: AT+DOWNTE

Poloaʻi Esoample	Function/Parameters	Response/Explanation
AT+DOWNTE=?	Get current Settings	0,0 (default) OK
AT+DOWNTE=a,b	a: Set the conversion between the downlink of the standard version and 1T version	0: Set the downlink of the standard version. 1: Set the downlink of the 1T version(ThingsEye platform)
	b: Enable/Disable downlink debugging	0: Disable downlink debugging mode. 1: Enable downlink debugging mode, users can see the original downlink reception.

ExampLe:
AT+DOWNTE=0,1 // Set to standard version downlink, and enable downlink debugging.
AT+DOWNTE=1,1 // Set to 1T version downlink, and enable downlink debugging.

Downlink Poloaiga:
No downlink commands for feature

Domain name resolution settings(Since firmware v1.3.0)

Vaega: Set dynamic domain name resolution IP.

AT poloaiga: AT+BKDNS

Poloaʻi Esoample	Function/Parameters	Response/Explanation
AT+BKDNS=?	Get current Settings	0,0,NULL (default) OK
AT+BKDNS=a,b,c	a: Enable/Disable dynamic do- main name resolution.	1: Disable dynamic domain name update. The ip address will be saved after the domain name is resolved, if the next domain name resolution fails, the last saved ip address will be used. 2: Enable dynamic domain name update. The ip address will be saved after domain name resolution, if the next domain name resolution fails, the last saved ip address will be used, and the domain name resolution will be up- dated regularly according to the time set by the customer.
	b: Set the time to update the domain name resolution at reg- ular intervals.	Unit: hour
	c: Set the IP address manually.	The format is the same as AT+SERVADDR. If domain name resolution fails, this ip address will be used directly, if domain name resolution succeeds, parameter c will be updated to the successfully resolved IP address.

ExampLe:

• AT+BKDNS=1,0 // Dynamic domain name resolution is disabled.
• AT+BKDNS=2,1 // The dynamic domain name resolution function is enabled and the automatic update time is set to 1 hour.
• AT+BKDNS=2,4,3.69.98.183,1883 // The dynamic domain name resolution function is enabled and the automatic update time is set to 4 hour, and manually set the ip address, if the domain name failed to resolve, it will directly use this ip to communicate.

When the next domain name resolution is successful, it will be updated to the ip address of the successful resolution.

Downlink Poloaiga:
No downlink commands for feature

Configure DDS75-NB

Fa'atonu Metotia
DDS75-NB supports below configure method:

AT Command via Bluetooth Connection (Recommended): BLE Configure Instruction .
AT Command via UART Connection : See UART Connection .

Serial Access Password
After the Bluetooth or UART connection is successful, use the Serial Access Password to enter the AT command window.

The label on the box of the node will print the initial password: AT+PIN=xxxxxx, and directly use the six-digit password to access the AT instruction window.

If you need to change the password, use AT+PWORD=xxxxxx (6 characters), NB nodes only support lowercase letters.

Fa'aaliga: After entering the command, you need to add a line break, and you can also set automatic line breaks in the Bluetooth tool or UART connection tool.

AT Poloaiga Seti

• AT+ ? : Fesoasoani atu
• AT+ : Taufetuli
• AT+ = : Seti le tau
• AT+ =? : Maua le tau

Poloaiga Lautele

• AT: Attention
• AT? : Fesoasoani Puupuu
• ATZ: MCU Reset
• AT+TDC: Application Data Transmission Interval
• AT+CFG: Print all configurations
• AT+CFGMOD: Working mode selection
• AT+DEUI: Get or set the Device ID
• AT+INTMOD: Set the trigger interrupt mode
• AT+5VT: Set extend the time of 5V power
• AT+PRO: Choose agreement
• AT+RXDL: Extend the sending and receiving time
• AT+DNSCFG: Get or Set DNS Server
• AT+GETSENSORVALUE: Toe fa'afo'i le fua fa'atatau o lo'o iai nei
• AT+NOUD: Get or Set the number of data to be uploaded
• AT+CDP: Read or Clear cached data
• AT+SERVADDR: Server Address

MQTT Pulega

• AT+CLIENT: Get or Set MQTT client
• AT+UNAME: Get or Set MQTT Username
• AT+PWD: Get or Set MQTT password
• AT+PUBTOPIC: Get or Set MQTT publish topic
• AT+SUBTOPIC: Get or Set MQTT subscription topic

Fa'amatalaga

• AT+FDR: Factory Data Reset
• AT+PWORD: Serial Access Password
• AT+LDATA: Get the last upload data
• AT+CDP: Read or Clear cached data

Ma'a & Malosi'i

DDS75-NB use ER26500 + SPC1520 battery pack. See link below for detail information about the battery info and how to replace.
Fa'amatalaga maa & Su'esu'ega Fa'aaogāga Malosiaga .

Fa'afouga firmware

User can change device firmware to:

• Fa'afou i foliga fou.
• Fa'asa'o fa'aletonu.

Firmware and changelog can be downloaded from : Firmware download link

Metotia e fa'afou ai Firmware:

• (Recommended way) OTA firmware update via BLE: Instruction .
• Update through UART TTL interface: Instruction .

Fa'alavelave Fa'alavelave

Aisea e fa'aalia ai le 0 po'o le "Leai se masini"

1. O le mea e fua ai e latalata tele i le masini, ae i le itu tauaso o le masini.
2. Ua motusia uaea sensor
3. Le fa'aogaina le decoder sa'o

Abnormal readings The gap between multiple readings is too large or the gap between the readings and the actual value is too large.

1. Please check if there is something on the probe affecting its measurement (condensed water, volatile oil, etc.)
2. Does it change with temperature, temperature will affect its measurement
3. If abnormal data occurs, you can turn on DEBUG mode, Please use downlink or AT COMMAN to enter DEBUG mode.downlink command: F1 01, AT command: AT+DDEBUG=1
4. A maeʻa ona ulufale i le debug mode, o le a tuʻuina atu 20 fasi faʻamaumauga i le taimi, ma e mafai ona e auina mai lona uplink ia i matou mo le auiliiliga

O lona uta muamua o le a umi atu nai lo isi faʻamatalaga. E ui lava o loʻo faʻavasegaina, e mafai ona iloa o faʻamatalaga e le masani ai.
Fa'amolemole lafo mai fa'amatalaga ia matou mo siaki.

Faʻamatalaga oka

Part Number: DDS75-NB-XX

XX:

• GE: Fa'amatalaga lautele ( Va'ai le kata SIM)
• 1T: with 1NCE * 10 years 500MB SIM card and Pre-configure to ThingsEye server

Fa'amatalaga afifi

afifi e aofia ai:

• DDS75-NB NB-IoT Distance Detection sensor x 1
• Velo mai fafo x 1
• Fua ma le mamafa:
• Tele o Meafaigaluega: 13.0 x 5 x 4.5 cm
• Mamafa Meafaitino: 150g
• Package Size / pcs: 14.0 x 8x 5 cm
• Weight / pcs: 180g

Lagolago

• E maua le lagolago i le Aso Gafua i le Aso Faraile, mai le 09:00 i le 18:00 GMT+8. Ona o sone taimi eseese e le mafai ona matou ofoina atu le lagolago tuusao. Ae ui i lea, o au fesili o le a taliina i se taimi vave e mafai ai i le faasologa na taʻua muamua.
• Tuuina atu le tele o faʻamatalaga e mafai ai e uiga i lau suʻesuʻega (faʻataʻitaʻiga oloa, faʻamatala saʻo lou faʻafitauli ma laasaga e toe fai ai ma isi) ma lafo se meli i Lagolago@dragino.cc .

FAQ

O le a le umi e tumau ai le maa pe a uma le tau?

The 8500mAh Li-SOCI2 battery can last several years on a full charge under normal usage conditions.

Can I change the default IoT server connection settings?

Yes, you can configure the IoT server connection settings to connect to a different server if needed. Refer to the user manual for detailed instructions on changing server settings.

E mafai faapefea ona ou maua t BC660K-GL AT Poloaiga?

E mafai e le tagata fa'aoga ona fa'aoga sa'o i le BC660K-GL ma lafo AT Poloaiga. Va'ai BC660K-GL AT Poloaiga seti

Can I use DDS75-NB in condensation environment?

DDS75-NB is not suitable to be used in condensation environment. Condensation on the DDS75-NB probe will affect the reading and always got 0.

How to configure the certificate?

User can can refer to this description to configure the certificate.

Pepa / Punaoa

Dragino DDS75-NB NB-IoT Distance Detection Sensor [pdf] Tusi Taiala DDS75-NB NB-IoT Distance Detection Sensor, DDS75-NB, NB-IoT Distance Detection Sensor, Distance Detection Sensor, Detection Sensor

Fa'asinomaga

• Tusi Taiala