reading i2c sensors

[adrianardu]

Hi,
I need some help. I want to read sensor values from a I2C sensor.
I think I need the sysex commands. I tried this:

arduino.pinMode(3, firmata.PIN_MODE_I2C);
arduino.pinMode(2, firmata.PIN_MODE_I2C);
console.log("I2C activated");
arduino.sysex('I2C_CONFIG');
arduino.sysex('I2C_REQUEST, [0x58, 'I2C_READ'], function(x){
arduino.on('sysex', function(e){
console.log("Data: ", e.command);
console.log("data : " + JSON.stringify(e.data));
});

It is not working and I have no idea how to realise the reading.
Thanks