A question I thought Google would solve easily but I find no answers. Maybe because it is not doable?
I need to control a relay (lights on/off). I need people passing by being able to do this. People that cannot be expected to install apps to do this. I need to keep it simple.
I did it with WiFi and a captive portal and it works ok. I was thinking there might be a even simpler way to do it but don't know if it is doable. Knowledge/links would help..
My thinking: The default way of controling relays thru bluetooth is thru installing an app on the phone. I need to control it without App to keep it simple. With headsets it seems possible? I just pair headsets and can control volume, read batterylevels etc (Or is volume settings actually not sent to the headset?...?)
I was thinking I could control the relay thru 'volumesettings' etc...?
Hope I am sufficiently clear..