You don’t say how big your data “packets” are, but seems like you might need something like the RCM4300 for the larger flash memory. If you DO need the larger memory, you will need to purchase the FAT system from Rabbit if you don’t already have it.
That said, I believe there are a fair number of sample code examples for serial and packet specific schemes in the Samples directory. You also don’t say what your radio requirements are. If short range, Zigbee could work. For longer range, you might need something from Black Box or others. There are both full duplex and simplex solutions, depending upon how much money you have to spend. I have done some radio link applications, but am not at liberty to share the code. In any case, not sure just how much the code would help. You have several different subsystem requirements here. Good luck.