I am using a Fio to control a set of relays. The unit uses an XBee (series 1 Pro) in transparent mode to receive commands over serial UART and everything works fine. The XBee is also configured for digital Input/Output Line Passing and the XBee on the Fio "mirrors" on an output pin the input state on a remote XBee and also this works fine.
How can I interrogate from the Fio the state of the output pin (e.g. D0) of the local (receiving) XBee? Is there an AT command that I could send via
Serial.println("ATxx") that would trigger the XBee to send back over UART the status of the pin (high or low)?