The send-function is used to send updates to the controller, in your case the physical-button-switch-change. Doing the send, does not control anything on the node itself.

I figured it out: there is a bug in UI7 where when I press the start button for inclusion mode it never stops and the manual stop button doesn't do anything. It took a lot of luup restarts at the right moment to get it to work. I don't know if this is a bug but I tried this on 2 Veras and it did the same so it's not just for me I think....

@hek That did it! I included the library with the Arduino IDE and it put it on the top. Didn't know that, thanks!

@nicomedia I stumbled on this doing a google search. Just wondering if you are still trying to get your Sonoff's working with your Vera controller? If so, I have written a blog post on the subject. It uses a different firmware called ESP Easy and an HTTP Switch plugin on the Vera rather than MySensors. but it works rather well for me. Here is the link to the blog post: https://dan.bemowski.info/2017/07/04/using-a-sonoff-with-espeasy-and-vera/ I use this in conjunction with some MySensors wall switches that I built. https://dan.bemowski.info/2017/06/11/my-start-into-open-source-hardware/