I am trying to connect two Xbee S3B units together using transparent mode. The purpose is for purely direct serial comms. When I use them in explorer bases I can communicate using minicom across both units in either direction. Central gateway > pump unit pump unit> central gateway. I have set ATID- same, ATBD-3 both units, ATD6-0 ATD7-0 ATAP-0 if necessary I will post the minicom script I'm using to program them.
However when I take one unit out of the explorer base and put it into my arduino shield, or use a break out board with arduino It will no longer work when transmitting from gateway to pump unit but will work from pump unit to central gateway. I have configured the arduino to spit out the relay state and also a hello world on setup. I am finding this is getting through but any comms from the central gateway is not getting through. What is strange is that the base I have it attached to in the arduino is showing that it is associated. The gateway unit is showing association and that data is getting to it, whn I type the Data in light is coming on but nothing is being received at the other end. This is a little strange as when plugged back into explorer bases with no change to settings they instantly communicate. I'm suspecting a hardware issue, do I need to pull a pin to ground to enable the communications getting through? Is there something obvious that I am missing?