yes. you need sudo level to access the gpio with those externals and will crash if you don't start pd as sudo.What do you mean with external crash? do you refer the wiringPi externals?El 06/07/2015, a las 8:52 p.m., Jaime E Oliver <jaime.oliver2@gmail.com> escribió:the externals will crash pd if it isn't opened with sudo.J