ADC0 with xbee pro S1 + LM35 + Arduino

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Good day all,

I have been trying to get correct values from the LM35 sensor that to be sent to arduino, but I think my configuration and wiring for the xbee somehow NOT right. I am not quite sure if I had to use Vref pin or NOT. Please help me. I read the datasheet many time and I do not know how to get (MSB and LSB) according to video I watched on youtube. (