[Arhowk]

Most standard communcation will return a checksum with a data good/data bad signal after transmission (as I said, I haven't used the serial port, but it is the easiest way to ensure data integrity, especially since RS232 is bidirectional)

Also, you should always post code when you have an issue regardless of how trivial or complex your issue is.

There are some options you should try, in order of when you should do them

1. Initialize ALL variables of the serial port, not just baud rate
2. Switch your buffer mode to flush on full than manually flush after every call with step by step debugs and try catch blocks
3. Reflash your roboRIO
4. Find a new arduino
5. Refactor your flushing method to follow what I described earlier by queue threading the flush command