Read sensors work, but motors control don't.

[Dtanguy]

Hi, i a trying to control a roomba create 2 through serial port, the connexion and reading sensors work, but motors control don't.

var robot = require("create-oi");
 
robot.init({ serialport: "/dev/ttyUSB0", version: 2 });

robot.on('ready', function() {
        console.log('Ready');
	this.rotate(100); // This don't
});
 
robot.on('bump', function(bumpEvent) {
    console.log(bumpEvent); // This work
});

Any clue how to make it move ?