I have an XBee Series 2 and I was trying to detect an input from a signal which was 12v, so I used a voltage divider with R1=220k and R2=24k, I checked the output voltage with multipmeter and it was 1.2v, which is what XBee S2 input pin is meant to get, however the XBee was not able to detect that input, could you please tell me why was it? could it be because the output current (Io) from the voltage divider was so low that it couldn't detect it? if so what register values should I use.
Also my second question is what if I want to power XBee from the output of that voltage divider, what register values should I used if I am to power it from the same voltage divider?
Basically I want to use XBee (S2) to get power from a Texecom Premier 24 alarm system, and also want it to read the status of the output pins (digi output) and send signals to a remote server wirelessly, but since XBee data input pins cannot read 12v signal which is why I had to use a voltage divider but still it was not been able to detect the signal, which is why I'm thinking may be the register values I used were not the correct ones for this setup.
I'll really appreciate if someone could help me with this, as I seem to be getting no where on my own because of having very limited knowledge of electronics