Emoncms online/hosted button

Hi All

I'm currently using the online hosted Emoncms.

What i'm hoping to achieve is to use the button widget on a dashboard to change the value of a feed from say 0 to 1 when it's pressed and depressed (red/green).

I'm then hoping to be able to read the feed value via a HTTP request such as GET /feed/value.json?&id=XXXX. This will allow me to rudimentary control a device from the web by regularly polling the feed from my device.

I can read the value of a feed via a HTTP request but I cannot figure out the button widget and have searched.

Is this possible with the button widget or is it simply not for this and if so could this be a feature request?

Thanks