Pin compatible but …
Well, went to try out the Synapse XBEE replacements (SNAP). Unfortunately I had assumed that I could plug the base node into my PC via the DFRobot XBee USB V2 I had in my drawer. It was the first time I had dusted it off so first sign of a problem was that the driver installation failed with an Error 10 (driver didn’t start). When the USB dongle is connected to the computer, Windoze assigns it a COM port but obviously assigns the wrong drivers. I have posted on the DFRobot user group to see if someone else had solve the problem.
In any event, decided (begrudgingly) to order a Synapse USB dongle board for the base node – just to be on safe side.
The USB dongle is not an XBEE format. The Synapse site says it fits “all” their modules – it should have said “all but the XBEE format” modules. I ended up having to order a RF200PD1 module which is the Synapse propriety format. The RF200PD1 will talk to the RF266Pc1 XBEE foot-print format modules so this isn’t an issue. The confusion on the site on what mates with what is.
Synapse have updated their site to clarify that there is a difference in form factor between the two models so you aren’t misled by the use of “all”.