Xbee resetersion


I am using xbee module in a C# app using a serial port. I have a problem when connecting the module. I am forced to use XCTU to reset then after that I can communicate with the module in my application.

I have a XBee Pro S2B
Product Family : XBP24BZ7
Function set : ZigBee Coordinator API
Firmware version : 21A7
Hardware version : 1E4C

Sounds like you are not releasing the COM port or you are not sending full API frames.