I am trying to read and display the voltage measured into my laptop. I have already setup everything except one. How do i connect 2 ends of the voltage node to my Xbee which only has one port. I cannot connect the negative end to ground because the positive and negative ends have different voltages offsetting each other. The voltage difference is what i want. I am using XBee Series 2
Thank you all in advance
P.s I am new to XBee, this is my first project.