Integrate with MongoDB

In this article, we will simulate the temperature and humidity data, and publish these data to EMQX Cloud via the MQTT protocol, and then we will use the EMQX Cloud Data Integrations to store the data to MongoDB.

Before you start, you will need to complete the following:

• Deployments have already been created on EMQX Cloud (EMQX Cluster).
• For Professional Plan users: Please complete Peering Connection Creation first, all IPs mentioned below refer to the internal network IP of the resource.(Professional Plan with a NAT gateway can also use public IP to connect to resources)

MongoDB Configuration

1. Install MongoDB

   # EMQX currently supports MongoDB 5.x drivers, not 6.x yet
   docker run --name mongo -d -p 27017:27017 mongo:5.0
   

2. Enter Container

   docker exec -it mongo mongosh emqx
   

3. Insert data into temp_hum collection and view the result.

   db.temp_hum.insert({up_timestamp: 34256, client_id: 1, temp: 20, hum: 33})
   db.temp_hum.find()
   

   

Data Integrations Configuration

Go to Deployment Details and click on Data Integrations on the left menu bar.

1. Create MongoDB Resource

   Click on MongoDB Single Mode under the Data Persistence.

   

   Fill in the information you have just created and click Test. If there is an error, you should check if the database configuration is correct. Then click on New to create MongoDB resource

   

2. Create Rule

   Choose the MongoDB resource under Configured Resources, click on New Rule and enter the following rule to match the SQL statement. In the following rule we read the time up_timestamp when the message is reported, the client ID, the message body (Payload) from the temp_hum/emqx topic and the temperature and humidity from the message body respectively.

   SELECT 
      timestamp div 1000 AS up_timestamp, clientid AS client_id, payload.temp AS temp, payload.hum AS hum
   FROM
      "temp_hum/emqx"
   

   

3. Create Action

   Click on the Next button in the bottom to enter action view. Select the resource created in the first step, select Data Persistence - Data to MongoDB for Action Type and enter the following data to insert into the SQL template.

   

   Click on Confirm to create action.

4. View Resource Detail

   Click on the resource to see the detail.

   

5. Check Rules Monitoring

   Click the monitor icon of rule to see the metrics

   

Test

1. Use MQTT X (opens new window) to simulate publishing temperature and humidity data

   You need to replace broker.emqx.io with the deployment connection address you have created and add the client-side authentication information in the EMQX Dashboard.

2. View stored results

   db.temp_hum.find()