function roll(degree, duration_ms) { board.servoWrite(pwmROLL, degree); sleep.usleep(duration_ms * 1000); }
function yaw(degree, duration_ms) { board.servoWrite(pwmYAW, degree); sleep.usleep(duration_ms * 1000); }
function pitch(degree, duration_ms) { board.servoWrite(pwmPITCH, degree); sleep.usleep(duration_ms * 1000); }