Monitoring a file or directory for changes using a watch node

You can monitor files or directories for changes. Whenever a monitored file or directory changes, a message indicating the change is injected into the flow.

  1. Open Node-RED.
  2. Add a watch node from the advanced category to the workspace.
  3. Double-click the watch node to open the Edit watch node dialogue.
  4. In the text box File(s), specify the path to the file or directory you want to monitor (e. g. /home/admin/user).

  5. NOTICE

    notice

    The memory card is accessible at the file path /run/media/mmcblk0p1/.

  6. NOTICE

    notice

    You can monitor multiple files or directories by entering a comma-separated list of file paths.

  7. If you are monitoring a directory and want to monitor all its sub-directories, enable the check box Watch sub-directories recursively.
  8. Click Done to apply your changes.
  9. Add more nodes to the workspace and connect them to a flow with the watch node being the first node.