So I've set up a basic Spring MVC site that is stored / hosted on Raspberry PI. My immediate aim is to send a signal to the Arduino that is connected via USB. Ultimately I'd like to power cycle a device.
I'm not exactly sure on where to go next, I'll have a selection or drop down box or some event on the site, the result of this action will then trigger the Arduino. It's this A -> B I'm having difficulties with. I'm not sure whether I can send a parameter that can be monitored or whether there's another better way. I've hunted around online and found nothing that gives some simple concrete instructions.
If it's possible for the PI / Arduino to monitor a param coming from a page then that would be my ideal solution but, gah, could someone possibly shed some light on this please?
Many thanks in advance.