That looks very complicated compared to what it needed to be. Can't find the link now, but there was a guy on hackaday or somesuch who connected the vibration alert to his car to start/unlock (don't remember which) it. So, get an old, cheap phone, take out vibration motor, connect to blender on/off toggle, then simply ring the phone and the blender starts. Its free too, because the call never has to go through.

Of course, doing it by sms the way this guy did means you can send it more complex commands.