Suspend the user application program, waiting for data.
This particular WAIT statement waits for port 0 bit 3 to go to 1, indicating that there is data in the receive buffer. Specifying other bits as well terminates the wait, for example, on key input or when the specified timeout interval has elapsed.
open "COM1:115200" as #1 wait 0,&h08
open "COM1:115200" as #1 wait 0,&h09
open "COM1:115200" as #1 timea = 30 ' set timeout interval to 3 seconds wait 0,&h19