hey~ I am sorry that I made a mistake, I had try 9600 ,38400 and 115200, all works fine~
it 's strange that It does work fine at 57600, I think it’s maybe RFBee use the Atmega168 internal crystal, which is unstable. 
hey~ I am sorry that I made a mistake, I had try 9600 ,38400 and 115200, all works fine~
it 's strange that It does work fine at 57600, I think it’s maybe RFBee use the Atmega168 internal crystal, which is unstable.