Broadcast plugin and sending messages with attachments

When sending a message to a group, it is not possible to send an attachment (audio file). Can it be done. using the Broadcast plugin in principle, and if so, how?

I don’t think that’s supported, and that it would take a considerable rewrite of the plugin to make that work.

What plugin should be used in this case?

None exists that has all functionality that you’re after. The functionality is a mix of that of the Http Upload and Broadcast plugins, but I don’t think you can make them work together like this.

This plugin GitHub - igniterealtime/Openfire-Chat: Chat API (REST) for Openfire is not suitable ?

I tried to combine Http Upload and Broadcast. At least when sending a message to a group from Blabber it works fine.
Thanks a lot!