Scenario description

For the edge broker that has collected data, it is necessary to report the collected data to the cloud. This article explains how to upload the edge business data to the remote MQTT Broker.

Upload to Baidu IoT Core

I. Prerequisites

• A network edge node that can get the device data (This demo uses the demo node of Modbus temperature and humidity sensor in the application case as the test node.)
• Baidu IoT Core account

II. Overall Process

The message flow of the edge side and IoT Core is shown in the figure below. Configure the message flow from broker topic to iotcore topic in this demo.

III. IoT Core Configuration

1. Create the IoT Core instance.

2. Add the template.

Select the instance, and add the template.

Edit the template and add the MQTT broker topic.

{deviceName} is the variable, which indicates that it shall be replaced with the device name when the corresponding device is connected. If the device name is device1 when you create the device, the device can subscribe to or release the $iot/device1/user/test topic according to the configuration.

3. Add the device.

Add the device with the name device1. Select the key authentication, and select the default template configured at just.

4. Connect, receive and send a message through MQTT.

Refer to Baidu AI Cloud Documentations to get the MQTT connection information and generate the user name and password.

Example of device connection information

IoTCoreId: agwrbcp
DeviceKey: device1
DeviceSecret: wgXHpQsNBnAPQSwx

agwrbcp.iot.gz.baidubce.com     #Broker connection address
thingidp@agwrbcp|device1|0|MD5     #Account name
facd01cc28f85cf3d223b2529f479a38     #password

IV. Edge Side Configuration

The data circulation rules are configured in the baetyl-rule module.

1. Create rule-conf configuration item

Configuration item code

`
clients:
  - name: iotcore
    kind: mqtt
    address: 'tcp://agwrbcp.iot.gz.baidubce.com:1883'
    username: thingidp@agwrbcp|device1|0|MD5
    password: facd01cc28f85cf3d223b2529f479a38
  - name: broker      #broker service name
    kind: mqtt
    address: 'tcp://broker:1883'
rules:
  - name: rule1
    source:
      client: broker
      topic: test
      qos: 1
    target:
      client: iotcore
      topic: $iot/device1/user/test
      qos: 1

`

2. Create the container service, and add the configuration item.

• Service name:baetyl-rule
• Image address: baetyltech/rule:v2.0.0
• Container directory: /etc/baetyl/

V. Testing

Subscribe to the IoT Core topic in the MQTT Box. You can receive the message from the temperature and humidity sensors.