At this point, sensors can start sending their readings to the Logstash data pipeline that we have created in the previous section. They just need to send data as follows:

curl -XPOST -u sensor_data:sensor_data --header "Content-Type: application/json" "http://localhost:8080/" -d '{"sensor_id":1,"time":1512102540000,"reading":16.24}'

Since we don't have real sensors, we will simulate the data by sending these types of requests. The simulated data and script that sends this data are incorporated in the code at https://github.com/pranav-shukla/learningelasticstack/tree/master/chapter-10/data.

If you are on Linux or macOS, open the terminal and change the directory to your Learning Elasticstack workspace that was checked out from GitHub.