Dragino DDS75-NB NB-IoT Distance Detection Sensor

ʻIke Huahana

Nā kikoʻī

• Nā ʻano DC maʻamau: NB-IoT Spec
• NB-IoT Module: BC660K-GL
• Nā pūʻulu kākoʻo:
  • 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
• Batri: Li/SOCI2 unchargeable battery
  • Kaha: 8500mAh
  • Hoʻokuʻu iā ʻoe iho:

Nā ʻōlelo hoʻohana huahana

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).

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

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

• E hōʻalo i ka hoʻouka nui ʻana i ka pākaukau.
• E hoʻopiha piha i ka pila ma mua o ka hoʻohana mua ʻana.
• Replace the battery when needed with a compatible battery type.

Nā Kiʻi hou 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.

Hoʻolauna

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.

Nā hiʻohiʻona

• NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
• Ka hoʻohana ʻana i ka mana ultra-haʻahaʻa
• ʻIke mamao ma ka ʻenehana Ultrasonic
• Ka laulā mea palahalaha 280mm – 7500mm
• Pono: ±(1cm+S*0.3%) (S: Ka lōʻihi)
• Measure Angle: 40°
• E hoonui i ka Sampling a me hoʻokahi uplink
• Support Bluetooth v5.1 remote configure and update firmware
• Uplink i kēlā me kēia manawa
• Downlink e hoʻololi i ka hoʻonohonoho
• IP66 Paʻa wai
• 8500mAh Battery no ka hoʻohana lōʻihi
• Kāleka Nano SIM no ka NB-IoT SIM

Hōʻike

Nā ʻano DC maʻamau:

• Lako Voltage: 2.5v ~ 3.6v
• Ka Mahana Hana: -40 ~ 85°C

NB-IoT Spec:
NB-IoT Module: BC660K-GL

Nā pūʻulu kākoʻo:

• 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

Batri:

• Li/SOCI2 pākaukau hiki ʻole ke kau ʻia
• Kaha: 8500mAh
• Hoʻokuʻu iā ʻoe iho: <1% / Makahiki @ 25°C
• ʻO ka nui o kēia manawa: 130mA
• ʻO ka hoʻonui ʻana i kēia manawa: 2A, 1 kekona

Hoʻohana mana

• Kūlana Kūlana: 10uA @ 3.3v
• ʻO ka mana hoʻoili kiʻekiʻe: 350mA@3.3v

Kūlana kaiapuni

'ikamu	Waiwai liʻiliʻi	Maʻamau waiwai	Ka waiwai nui	Unite	ʻŌlelo
Mahana mālama	-25	25	80	℃
Ka haʻahaʻa waihona		65%	90%	RH	(1)
Hana wela	-15	25	60	℃
ʻO ka haʻahaʻa hana		65%	80%	RH	(1)

Remarks: (1)

• Ke 0-39 ℃ ka mahana o ka ambient, ʻo ka haʻahaʻa kiʻekiʻe he 90% (non-condensing);
• Ke 40-50 ℃ ka mahana ambient, ʻo ka haʻahaʻa kiʻekiʻe ka haʻahaʻa kiʻekiʻe loa i ka honua kūlohelohe i ka mahana o kēia manawa (ʻaʻohe condensation)

Laulā ana kūpono

1. ʻO ka mea i hoʻāʻo ʻia he paipu cylindrical keʻokeʻo i hana ʻia me PVC, me ke kiʻekiʻe o 100cm a me ke anawaena o 7.5cm.
2. ʻO ka mea e hoʻāʻo ʻia he "pahu pahu pahu" kū pololei i ke koʻikoʻi waena o 0 °, a ʻo ka lōʻihi * ākea he 60cm * 50cm.

Nā noi

• Ana ana ka mamao
• Ana pae wai
• Pūnaehana hoʻokele kaʻa
• ʻO kahi kokoke a me ka ʻike ʻana
• Pūnaehana hoʻokele ʻōpala naʻauao
• Ka pale ʻana i nā pale pale robot
• Manaʻo 'akomi
• ʻili wai
• Ka nānā ʻana i ka pae wai o lalo

ʻO ke ʻano moe a me ke ʻano hana

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

Ke ano hana: 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 kēlā me kēia manawa, aia ka ʻike ma ke ʻano IDLE), ma ke ʻano IDLE, ua like ka mana o ka sensor me ke ʻano Hiemoe.

Pihi & LED

Behavior on ACT	Hana	Hana
	Send an uplink	If sensor has already attached to NB-IoT network, sensor will send an uplink packet, alakaʻi uliuli e hoʻomoe hoʻokahi. Meanwhile, BLE module will be active and user can connect via BLE to configure device.
	Mea Hana ʻeleu	Alakaʻi ʻōmaʻomaʻo e hoʻokēʻai i nā manawa 5, e komo ka mea hana ʻAno OTA 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

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

Nānā: Ke hoʻokō nei ka hāmeʻa i kahi papahana, hiki ʻole ke ʻae ʻia nā pihi. ʻOi aku ka maikaʻi e kaomi i nā pihi ma hope o ka hoʻokō ʻana o ka polokalamu.

pili BLE
DDS75-NB support BLE remote configure and firmware update.

Hiki ke hoʻohana ʻia ʻo BLE no ka hoʻonohonoho ʻana i ke ʻano o ka sensor a i ʻole e ʻike i ka hopena console mai ka sensor. E ho'ā wale ana ka BLE ma lalo o ka hihia:

• E kaomi i ke pihi e hoʻouna i kahi uplink
• E kaomi i ke pihi no ka mea hana.
• Hoʻomaka ka mana o ka polokalamu.

Inā ʻaʻohe pili hana ma BLE i 60 kekona, e pani ka mea ʻike i ka module BLE e komo i ke ʻano mana haʻahaʻa.

Wehewehe Pin , Hoʻololi a kuhikuhi SIM

ʻO Jumper JP2
E hoʻohana i ka ʻenehana ke kau ʻia kēia lele.

KE ANO BOOT / SW1

1. ISP: hoʻonui i ke ʻano, ʻaʻohe hōʻailona ma kēia ʻano. akā mākaukau no ka hoʻonui ʻana i ka firmware. ʻAʻole e hana ʻo LED. ʻAʻole holo ka firmware.
2. Flash: ke ʻano hana, hoʻomaka ka hāmeʻa e hana a hoʻouna i ka hoʻopuka console no ka debug hou aku

Pākuʻi Hoʻohou
E kaomi e hoʻomaka hou i ka mea hana.

Kuhikuhi Kāleka SIM
See this link. How to insert SIM Card .

Mekanika

Mechanical Probe:

Use DDS75-NB to communicate with IoT Server

E hoʻouna i ka ʻikepili i ke kikowaena IoT ma o ka pūnaewele NB-IoT
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.

Ma lalo e hōʻike i ke ʻano o ka pūnaewele:
There are two version: -GE and -1T version of DDS75-NB.

Manaʻo GE: 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 .

ʻAno Uku
To meet different server requirement, DDS75-NB supports different payload type.

Aia pū me:

• Uku nui JSON format. (ʻAno=5)
• ʻO ke ʻano HEX Uku Uku. (ʻAno=0)
• Hōʻano ThingSpeak. (ʻAno=1)
• Mea Papa Papa. (ʻAno=3)

Hiki i ka mea hoʻohana ke kuhikuhi i ke ʻano uku uku ke koho i ka protocol pili. Example:

• AT+PRO=1,0 // Use COAP Connection & hex Payload
• AT+PRO=1,5 // Use COAP Connection & Json Payload
• AT+PRO=2,0 // Hoʻohana i ka UDP Connection & hex Payload
• AT+PRO=2,5 // E hoʻohana i ka UDP Connection & Json Payload
• AT+PRO=3,0 // E hoʻohana i ka MQTT Connection & hex Payload
• AT+PRO=3,5 // E hoʻohana i ka MQTT Connection & Json Payload
• AT+PRO=4,0 // E hoʻohana i ka TCP Connection & hex Payload
• AT+PRO=4,5 // E hoʻohana i ka 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″]}

E hoʻomaopopo, mai luna o ka ukana:
Distance , Battery, Signal & time are the value at uplink time.
ʻO Json komo 1 ~ 8 ka hope 1 ~ 8 sampling data as specify by AT+CLOCKLOG=1,65535,15,8 Command. Each entry includes (from left to right): Temperature,Humidity, Sampmanawa lōʻihi.

Hōʻano HEX Uku Uku(Ke ʻano=0)

This is the HEX Format. As below: f863663062798914f46008351350731409820ce81101000008d1673ef0a1083d673ee99e03f7673ee619045e673e

Inā mākou e hoʻohana i ka mea kūʻai aku MQTT e kau inoa i kēia kumuhana MQTT, hiki iā mākou ke ʻike i ka ʻike aʻe i ka wā e ʻike ai ka NB sensor uplink data.

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

Manaʻo:
Loaʻa i kēia mau bytes ka mana a me ka polokalamu lako polokalamu.
Higher byte: Specify Sensor Model: 0x09 for DDS75-NB
Lower byte: Specify the software version: 0x82=130, means firmware version 1.3.0

BAT (ʻike pākaukau):
Ex1: 0x0D38 = 3384mV

Ka ikaika hōʻailona:
NB-IoT Network hōʻailona ikaika.

Ex1: 0x13 = 19

• 0 -113dBm or less 1 -111dBm
• 2…30 -109dBm… -53dBm
• 31 -51dBm a ʻoi aku paha
• 99 ʻAʻole ʻike ʻia a ʻike ʻole ʻia

Hoʻopau:
If this packet is generated by interrupt or not.

Example:

• 0x00: Puke uplink maʻamau.
• 0x01: Hoʻopau i ka ʻeke Uplink.

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)

Ka mamao:
E kiʻi i ka mamao. Ka laulā mea palahalaha 280mm – 7500mm.
No example, inā he 0x0B 0x05 ka ʻikepili i loaʻa iā ʻoe mai ka papa inoa, ʻo ka mamao ma waena o ka mea ʻike a me ka mea i ana ʻia.
0B05(H) = 2821 (D) = 2821 mm.
Inā he 0x0000 ka waiwai ʻike, ʻo ia hoʻi, ʻaʻole ʻike ʻia ka ʻōnaehana kani ultrasonic.

Manawaamp:
Unit Timestamp Example: 6653ddb4(H) = 1716772276(D)
E kau i ka waiwai decimal i loko o kēia loulou(https://www.epochconverter.com) ) to get the time.

Uku Mea Papa (Kōhua=3)
Type3 payload special design for ThingsBoard, it will also configure other default server to ThingsBoard.
{
“topic”: “2276492”,
“kaumaha”: {
“IMEI”: “863663062798914”,
“Model”: “DDS75-NB”,
“distance”: 347,
“interrupt”: 0,
“interrupt_level”: 0,
"pāʻani": 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”] }
}

Uku Uku ThingSpeak(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 like me lalo:
field1=Distance value&field2=Battery value&field3=Signal value

Hoʻāʻo i ka Uplink a hoʻololi i ka Interval Hoʻohou

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
• Hōʻano: Code Command (0x01) a ukali ʻia e 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.

Nānā: Hiki i ka mea hoʻohana ke kaomi i ke pihi ma mua o 1 kekona e hoʻāla i kahi uplink.

Nunui-Samplings and Hoʻokahi uplink

Hoʻolaha: 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 // He kekona ka ʻāpana, a ʻo ka mea paʻamau ka hoʻopaʻa ʻana i ka ʻikepili i hoʻokahi manawa i kēlā me kēia 900 kekona (15 mau minuke, hiki ke hoʻonohonoho ʻia ka liʻiliʻi i 180 kekona)
• AT+NOUD=8 // Hoʻouka ka hāmeʻa i nā pūʻulu 8 o ka ʻikepili i hoʻopaʻa ʻia ma ka paʻamau. Hiki ke hoʻouka ʻia a hiki i 32 mau pūʻulu ʻikepili.

ʻO ke kiʻikuhi ma lalo nei ka wehewehe ʻana i ka pilina ma waena o TR, NOUD, a me TDC.

E hoʻokaʻawale i kahi uplink me ka hoʻopau waho
DDS75-NB has an external trigger interrupt function. Users can use the GPIO_EXTI pin to trigger the upload of data packets.

kauoha AT:

• AT+INTMOD // E hoʻonohonoho i ke ʻano hoʻonā hoʻāla
• AT+INTMOD=0 // Disable Interrupt
• AT+INTMOD=1 // Hoʻomaka ma ka piʻi ʻana a me ka hāʻule ʻana
• AT+INTMOD=2 // Hoʻomaka ma ka hāʻule ʻana
• AT+INTMOD=3 // Hoʻomaka ma ka piʻi ʻana

Alarm mamao

Hiʻona: 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
Hōʻano: Code Command (0x08) a ukali ʻia e 4 bytes.
Example: Downlink Payload: 08 01 F4 07 D0 //AT+LDDSALARM=500,2000

Hoʻopaʻa ʻana i ka uaki (Mai ka mana o ka firmware v1.2.1)
I kekahi manawa ke kau nei mākou i nā nodes hope he nui i ke kahua. Makemake mākou i nā mea ʻike āpau 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: Hoʻopau i ka hoʻopaʻa ʻana i ka uaki. 1: E ho'ā i ka hoʻopaʻa inoa ʻana
• b: E wehewehe mua sampHoʻomaka ka lua: ka laulā (0 ~ 3599, 65535) // Nānā: Inā hoʻonohonoho ʻia ka ʻāpana b i 65535, hoʻomaka ka manawa log ma hope o ke komo ʻana o ka node i ka pūnaewele a hoʻouna i nā ʻeke.
• c: E wehewehe i ka sampka wā lōʻihi: ka laulā (0 ~ 255 mau minuke)
• d: ʻEhia mau helu e pono ke kau ʻia ma luna o kēlā me kēia TDC (max 32)

Nānā: 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 + nā s hou loaample i ka manawa uplink). E nānā ma lalo no ka example.

AT+KAUKA=1,65535,1,5
Ma hope o ka hoʻouna ʻana o ka node i ka ʻeke mua, hoʻopaʻa ʻia ka ʻikepili i ka hoʻomanaʻo ma nā manawa o 1 mau minuke. No kēlā me kēia uplink TDC, e komo pū ka ukana uplink: ʻike pākaukau + nā moʻolelo hoʻomanaʻo 5 hope loa (payload + timestamp).

Nānā: 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

Hōʻano: Code Command (0x0A) a ukali ʻia e 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:
  AT+KAUKA=1,1200,15,8

Nānā: When entering the downlink payload, there must be no Spaces between bytes.

Example Query i mālama i nā moʻolelo mōʻaukala

• kauoha AT: AT+CDP

Hiki ke hoʻohana ʻia kēia kauoha e ʻimi i ka mōʻaukala i mālama ʻia, e hoʻopaʻa ana i nā pūʻulu ʻikepili he 32, ʻo kēlā me kēia hui o ka ʻikepili mōʻaukala ka nui o 100 bytes.

Ka ninau log uplink

• kauoha AT: AT+GETLOG

Hiki ke hoʻohana ʻia kēia kauoha no ka nīnau ʻana i nā log upstream o nā ʻeke ʻikepili.

Hoʻoholo ʻia ka inoa puni honua
This command is used to set up scheduled domain name resolution.

kauoha AT:

• AT+DNSTIMER=XX // Unit: hola

Ma hope o ka hoʻonohonoho ʻana i kēia kauoha, e hana mau ʻia ka hoʻonā inoa inoa.

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

kauoha AT:

• AT+MQOS=xx // 0~2

Downlink command: 0x07

• ʻAno: 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.

kauoha AT:

• 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)
Hiʻona: Set the conversion between the standard version and 1T version downlinks.

kauoha AT: AT+DOWNTE

Kauoha Example	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.

Kauoha i lalo:
No downlink commands for feature

Domain name resolution settings(Since firmware v1.3.0)

Hiʻona: Set dynamic domain name resolution IP.

kauoha AT: AT+BKDNS

Kauoha Example	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.

Kauoha i lalo:
No downlink commands for feature

Configure DDS75-NB

Hoʻonohonoho i nā ʻano hana
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.

Nānā: 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.

Hoʻonohonoho ʻia nā kauoha AT

• AT+ ? : Kōkua ma
• AT+ : Holo
• AT+ = : E hoonoho i ka waiwai
• AT+ =? : Loaʻa ka waiwai

Kauoha Nui

• AT: Attention
• AT? : Kōkua pōkole
• 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: Hoʻihoʻi i ke ana ʻike i kēia manawa
• AT+NOUD: Get or Set the number of data to be uploaded
• AT+CDP: Read or Clear cached data
• AT+SERVADDR: Server Address

Hooponopono MQTT

• 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

ʻIkepili

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

Hoʻohana ʻana i ka pākaukau a me ka mana

DDS75-NB use ER26500 + SPC1520 battery pack. See link below for detail information about the battery info and how to replace.
ʻIkepili Bateri a me ka hoʻohana ʻana i ka mana.

Hoʻohou paʻa

User can change device firmware to:

• Hoʻohou me nā hiʻohiʻona hou.
• Hoʻopau i nā pōpoki.

Firmware and changelog can be downloaded from : Firmware download link

Nā ala e hōʻano hou i ka firmware:

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

Hoʻopiʻi pilikia

No ke aha e hōʻike ai ka heluhelu ʻana i ka sensor 0 a i ʻole "No sensor"

1. Kokoke loa ka mea ana i ka mea ike, akā ma ka makapo o ka mea ike.
2. Hoʻokuʻu ʻia ka uwea sensor
3. ʻAʻole hoʻohana i ka decoder kūpono

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. Ma hope o ke komo ʻana i ke ʻano debug, e hoʻouna ʻo ia i 20 mau ʻikepili i ka manawa, a hiki iā ʻoe ke hoʻouna i kāna uplink iā mākou no ka nānā ʻana.

E ʻoi aku ka lōʻihi o kāna uku mua ma mua o nā ʻikepili ʻē aʻe. ʻOiai ke hoʻopaʻa ʻia nei, hiki ke ʻike ʻia he ʻikepili ʻokoʻa.
E ʻoluʻolu e hoʻouna i ka ʻikepili iā mākou no ka nānā.

ʻIke ʻIke

Part Number: DDS75-NB-XX

XX:

• GE: Manaʻo maʻamau (E wehe i ke kāleka SIM)
• 1T: with 1NCE * 10 years 500MB SIM card and Pre-configure to ThingsEye server

ʻIkepili Hoʻopili

Aia pū kekahi pūʻolo:

• DDS75-NB NB-IoT Distance Detection sensor x 1
• Antenna kūwaho x 1
• Ana a me ke kaumaha:
• Nui o ka mea hana: 13.0 x 5 x 4.5 knm
• Kaumaha o ka mea hana: 150g
• Package Size / pcs: 14.0 x 8x 5 cm
• Weight / pcs: 180g

Kākoʻo

• Hāʻawi ʻia ke kākoʻo i ka Pōʻakahi a i ka Pōʻalima, mai 09:00 a i 18:00 GMT+8. Ma muli o nā ʻāpana manawa like ʻole ʻaʻole hiki iā mākou ke hāʻawi i ke kākoʻo ola. Eia naʻe, e pane koke ʻia kāu mau nīnau ma ka papa kuhikuhi i haʻi ʻia ma mua.
• E hāʻawi i ka ʻike e like me ka hiki e pili ana i kāu nīnau (nā huahana huahana, wehewehe pololei i kou pilikia a me nā ʻanuʻu e hana hou ai a pēlā aku) a hoʻouna i kahi leka i Kākoʻo@dragino.cc .

FAQ

ʻEhia ka lōʻihi o ka pau ʻana o ka pākaukau ma kahi hoʻopiha piha?

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.

Pehea e hiki ai iaʻu ke komo i nā kauoha BC660K-GL AT?

Hiki i ka mea hoʻohana ke komo pololei iā BC660K-GL a hoʻouna i nā kauoha AT. E nana BC660K-GL AT Command set

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.

Palapala / Punawai

Dragino DDS75-NB NB-IoT Distance Detection Sensor [pdf] Palapala Hoʻohana DDS75-NB NB-IoT Distance Detection Sensor, DDS75-NB, NB-IoT Distance Detection Sensor, Distance Detection Sensor, Detection Sensor

Nā kuhikuhi

• Palapala Hoʻohana