Sure. If you want to send information to a plugin, you can do it through the HTTP interface. The mechanism is exactly the same as, say, setting the on-off state of an appliance. See here.
If you want to send custom data, you will need a custom device D_foo.xml, with a custom service S_foo.xml, and custom code in I_foo.xml to act on the incoming data.
Hi Futzle, nice to read you.
Thank you for your link.
After reading that, I remember a virtual device state. So I use it and it works perfectly. I’ve just to code my perl script to use http post to vera.