Table of Contents:

• 1. The use of this guideline
• 2. Attach Network
  • 2.1 General Configure to attach network
  • 2.2 Speed Up Network Attach time
• 3. Configure to connect to different servers
  • 3.1 General UDP Connection
    • 3.1.1 Simulate UDP Connection by PC tool
    • 3.1.2 Configure NB-IoT Sensor
      • 3.1.2.1 AT Commands
      • 3.1.2.2 Uplink Example
  • 3.2 General MQTT Connection
  • 3.3 ThingSpeak (via MQTT)
    • 3.3.1 Get MQTT Credentials
    • 3.3.2 Simulate with MQTT.fx
      • 3.3.2.1 Establish MQTT Connection
      • 3.3.2.2 Publish Data to ThingSpeak Channel
    • 3.3.3 Configure NB-IoT Sensor for connection
      • 3.3.3.1 AT Commands:
      • 3.3.3.2 Uplink Examples
      • 3.3.3.3 Map fields to sensor value
  • 3.4 Datacake
    • 3.4.1 Create device
    • 3.4.2 Scan QR code to obtain data
    • 3.4.2 AT command for connecting to DataCake
  • 3.5 Node-Red (via MQTT)
    • 3.5.1 Configure Node-Red
    • 3.5.2 Simulate Connection
    • 3.5.3 Configure NB-IoT Sensors
  • 3.6 ThingsBoard.Cloud (via MQTT)
    • 3.6.1 Configure ThingsBoard
      • 3.6.1.1 Create Device
      • 3.6.1.2 Create Uplink & Downlink Converter
      • 3.6.1.3 MQTT Integration Setup
    • 3.6.2 Simulate with MQTT.fx
    • 3.6.3 Configure NB-IoT Sensor
  • 3.7 Tago.io (via MQTT)
    • 3.7.1 Create device & Get Credentials
    • 3.7.2 Simulate with MQTT.fx
    • 3.7.3 tago data
  • 3.8 TCP Connection

1. The use of this guideline

This configure instruction is for Dragino NB-IoT models with -NB or -NS suffix, for example DDS75-NB. These models use the same NB-IoT Module BC660K-GL and has the same software structure. The have the same configure instruction to different IoT servers. Use can follow the instruction here to see how to configure to connect to those servers.

2. Attach Network

2.1 General Configure to attach network

To attache NB-IoT sensors to NB-IoT Network, You need to:

1. Get a NB-IoT SIM card from Service Provider. (Not the same as the SIM card we use in mobile phone)
2. Insert the SIM card to Sensor
3. Configure APN in the sensor (AT+APN=<APN>)

After doing above, the NB-IoT Sensors should be able to attach to NB-IoT network .

The -NB and -NS models support LTE Cat NB2, with below frequency band: multiple frequency bands of B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B28/B66/B70/B85 . Make sure you use a the NB-IoT SIM card.

2.2 Speed Up Network Attach time

BC660K-GL supports multi bands B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B28/B66/B70/B85.  It will search one by one and try to attach, this will take a lot of time and even cause attach fail. User can lock the band to specify band for its operator to make this faster. 

AT+QBAND?        // Check what is the current used frequency band

AT+QBAND=1,4     // Set to use 1 frequency band. Band4

AT+QBAND=2,8,20   // Set to use 2 frequency bands. Band 8 and Band 20

After connection is successful, user can use AT+QENG=0  to check which band is actually in used.

See bands used for different provider: NB-IoT Deployment , Bands, Operator list

3. Configure to connect to different servers

3.1 General UDP Connection

The NB-IoT Sensor can send packet to server use UDP protocol. 

3.1.1 Simulate UDP Connection by PC tool

We can use PC tool to simulate UDP connection to make sure server works ok. 

3.1.2 Configure NB-IoT Sensor

3.1.2.1 AT Commands

AT Commands:

• AT+PRO=2,0         //  Set to use UDP protocol to uplink ,Payload Type select Hex payload

• AT+SERVADDR=120.24.4.116,5601      //  Set UDP server address and port

• AT+CFM=1          //  If the server does not respond, this command is unnecessary

3.1.2.2 Uplink Example

3.2 General MQTT Connection

The NB-IoT Sensor can send packet to server use MQTT protocol. 

Below are the commands.

AT Commands:

• AT+PRO=3,0      //  Set to use MQTT protocol to uplink, Payload Type select Hex payload.

• AT+SERVADDR=120.24.4.116,1883        //  Set MQTT server address and port

• AT+CLIENT=CLIENT                                 //  Set up the CLIENT of MQTT

• AT+UNAME=UNAME                              //  Set the username of MQTT

• AT+PWD=PWD                                        //  Set the password of MQTT

• AT+PUBTOPIC=NSE01_PUB                    //  Set the sending topic of MQTT

• AT+SUBTOPIC=NSE01_SUB                    //  Set the subscription topic of MQTT

Notice: MQTT protocol has a much higher power consumption compare with UDP/CoAP protocol. Please check the power analyze document and adjust the uplink  period to a suitable interval.

3.3 ThingSpeak (via MQTT)

3.3.1 Get MQTT Credentials

ThingSpeak connection uses MQTT Connection. So we need to get MQTT Credentials first. You need to point MQTT Devices to ThingSpeak Channel as well. 

3.3.2 Simulate with MQTT.fx

3.3.2.1 Establish MQTT Connection

After we got MQTT Credentials, we can first simulate with PC tool MQTT.fx tool to see if the Credentials and settings are fine. 

• Broker Address: mqtt3.thingspeak.com

• Broker Port: 1883

• Client ID: <Your ThingSpeak MQTT ClientID>

• User Name: <Your ThingSpeak MQTT User Name>

• Password: <Your ThingSpeak MQTT Password>

3.3.2.2 Publish Data to ThingSpeak Channel

In MQTT.fx, we can publish below info:

• Topic: channels/YOUR_CHANNEL_ID/publish

• Payload: field1=63&field2=67&status=MQTTPUBLISH 

Where 63 and 67 are the value to be published to field1 & field2. 

Result: 

3.3.3 Configure NB-IoT Sensor for connection

3.3.3.1 AT Commands:

In the NB-IoT, we can run below commands so to publish the channels like MQTT.fx

• AT+PRO=3,1     // Set to use ThingSpeak Server and Related Payload

• AT+CLIENT=<Your ThingSpeak MQTT ClientID>

• AT+UNAME=<Your ThingSpeak MQTT User Name>

• AT+PWD=<Your ThingSpeak MQTT Password>

• AT+PUBTOPIC=<YOUR_CHANNEL_ID>

• AT+SUBTOPIC=<YOUR_CHANNEL_ID>

3.3.3.2 Uplink Examples

For SE01-NB

For DDS20-NB

For DDS45-NB

For DDS75-NB

For NMDS120-NB

For SPH01-NB

For NLM01-NB

For NMDS200-NB

For CPN01-NB

For DS03A-NB

For SN50V3-NB

3.3.3.3 Map fields to sensor value

When NB-IoT sensor upload to ThingSpeak. The payload already specify which fileds related to which sensor value. Use need to create fileds in Channels Settings. with name so to see the value correctly. 

Below is the NB-IoT Product Table show the mapping. 

3.4 Datacake

Dragino NB-IoT sensors has its template in Datacake Platform. There are two version for NB Sensor,

As example for S31B-NB. there are two versions: S31B-NB-1D and S31B-NB-GE.

• S31B-NB-1D: This version have pre-configure DataCake connection. User just need to Power on this device, it will auto connect send data to DataCake Server.

• S31B-NB-GE: This verson doesn't have pre-configure Datacake connection. User need to enter the AT Commands to connect to Datacake. See below for instruction. 

3.4.1 Create device

Add Device in DataCake.

Choose the correct model from template.

Fill Device ID. The device ID needs to be filled in with IMEI, and a prefix of 'f' needs to be added.

3.4.2 Scan QR code to obtain data

Users can use their phones or computers to scan QR codes to obtain device data information.

3.4.2 AT command for connecting to DataCake

AT+PRO=2,0

AT+SERVADDR=67.207.76.90,4445

3.5 Node-Red (via MQTT)

3.5.1 Configure Node-Red

Take S31-NB UDP protocol as an example.

Dragino provides input flow examples for the sensors.

User can download the required JSON file through Dragino Node-RED input flow template.

Download sample JSON file link: https://www.dropbox.com/sh/mduw85jcuwsua22/AAAvwPhg9z6dLjJhmZjqBf_ma?dl=0

We can directly import the template.

The templates for S31-NB and NB95S31B are the same.

Please select the NB95S31B template.

Successfully imported template.

Users can set UDP port.

3.5.2 Simulate Connection

We have completed the configuration of UDP. We can try sending packets to node red.

3.5.3 Configure NB-IoT Sensors

• AT+PRO=3,0 or 3,5     // hex format or json format
• AT+SUBTOPIC=<device name>or User Defined 
• AT+PUBTOPIC=<device name>or User Defined
• AT+CLIENT=<device name> or User Defined
• AT+UNAME=<device name> or User Defined
• AT+PWD=“Your device token”

3.6 ThingsBoard.Cloud (via MQTT)

3.6.1 Configure ThingsBoard

3.6.1.1 Create Device

Create a New Device in ThingsBoard. Record Device Name which is used for MQTT connection.

3.6.1.2 Create Uplink & Downlink Converter

Uplink Converter

The purpose of the decoder function is to parse the incoming data and metadata to a format that ThingsBoard can consume. deviceName and deviceType are required, while attributes and telemetry are optional. Attributes and telemetry are flat key-value objects. Nested objects are not supported.

To create an uplink converter go to the Integrations center -> Data converters page and click “plus” button. Name it “MQTT Uplink Converter” and select type "Uplink". Use debug mode for now.

Downlink Converter

The Downlink converter transforming outgoing RPC message and then the Integration sends it to external MQTT broke

Note: Our device payload is already human readable data. Therefore, users do not need to write decoders. Simply create by default.

3.6.1.3 MQTT Integration Setup

Go to the Integrations center -> Integrations page and click “plus” icon to add a new integration. Name it “MQTT Integration”, select type MQTT;

• The next steps is to add the recently created uplink and downlink converters;

Add a topic filter:

tb/mqtt-integration-tutorial/sensors//temperature --> Temperature  固定的? 对的。

You can also select an MQTT QoS level. We use MQTT QoS level 0 (At most once) by default;

3.6.2 Simulate with MQTT.fx

3.6.3 Configure NB-IoT Sensor

AT Commands

• AT+PRO=3,3    // Use MQTT to connect to ThingsBoard. Payload Type set to 3.

• AT+SUBTOPIC=<device name> 

• AT+PUBTOPIC=<device name>

• AT+CLIENT=<device name> or User Defined

• AT+UNAME=<device name> or User Defined

• AT+PWD=<device name> or User Defined

Test Uplink by click the button for 1 second

3.7 Tago.io (via MQTT)

3.7.1 Create device & Get Credentials

We use MQTT Connection to send data to Tago.io. We need to Create Device and Get MQTT Credentials first. 

Go to the Device section and create a device. Then, go to the section tokens and copy your device-token.

The device needs to enable the TLS mode and set the AT+TLSMOD=1,0 command.

On the Connection Profile window, set the following information:

• Profile Name: “Any name”

• Broker Address: mqtt.tago.io

• Broker Port: 8883

• Client ID: “Any value”

On the section User credentials, set the following information:

• User Name: “Any value”       // Tago validates your user by the token only

• Password: “Your device token”

• PUBTOPIC: “Any value”

• SUBTOPIC: “Any value”

AT command:

• AT+PRO=3,0 or 3,5     // hex format or json format

• AT+SUBTOPIC=<device name>or User Defined 

• AT+PUBTOPIC=<device name>or User Defined

• AT+CLIENT=<device name> or User Defined

• AT+UNAME=<device name> or User Defined

• AT+PWD=“Your device token”

3.7.2 Simulate with MQTT.fx

Users can run the AT+PRO=3,5 command, and the payload will be converted to JSON format.

3.7.3 tago data

3.8 TCP Connection

AT command:

• AT+PRO=4,0     // Set to use TCP protocol to uplink(HEX format)

• AT+PRO=4,1     // Set to use TCP protocol to uplink(JSON format)

• AT+SERVADDR=120.24.4.116,5600    // to set TCP server address and port

Sensor Console Output when Uplink:

See result in TCP Server: