How to read AIN0-1-2-3 from I2C

[oslucchi]

Hi Natdan/Robert
I'm using PI4J in a university project. It has been great experience so far. Thanks for the hard work you have done

I'm connecting an AD/DA to Raspberry PI based on PCF 8591 (this is the model for your reference http://blog.chrysocome.net/2012/12/i2c-analog-to-digital-converter.html)
I've 4 different moisture sensors i need to get data from. As far as i understand i should be able to connect each of them into the 4 Analog input ports available (AN0-1-2-3).
i was able to read the moisture (1 byte of data) via gpio -x pcf8591:0x48:120 aread 120.
I was only able to read data from sensor connected to pin AN0. Nothing came from sensors connected to pins A1-2-3.
Questions for you are:

• do you have a working example on how to perform the same read via PI4J?
• is there any example or document explaining how i can read data from all other sensors?

Looking forward to your response and again thanks very much for your work!

[oslucchi]

i got the answer :)
the java snippet for those who are interested is:
private I2CBus bus = I2CFactory.getInstance(0x1);
private I2CDevice device = bus.getDevice(0x48);

    try 
    {
        devoce.write((byte) (0x40 | (sensorId & 3)));
        devoce.read();
        buffer = (byte) devoce.read();
        unsignedValue = (short) ((short) 0x00FF & buffer);
    }
    catch (IOException e) 
    {
        logger.error("IOEXception " + e.getMessage() + " reading sensor " + sensorId);
        return false;
    }

the first read is meant to discard the unsignificant response byte

[narendranss]

What is sensorId value in the above snippet of program?