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I'm trying serial writing and reading from osx usb port. I can send and receive data but I discovered that when I change the open for writing to reading it needs 5 seconds to close the port.

sample:

open driver thePort for write --open driver thePort to send data
// send data to usb
close driver thePort --close the port

(needs about 5 seconds)

open driver thePort for read ---open driver thePort to receive data
// receive data
close driver thePort

Between closing the driver port and opening for receive data needs about 5 seconds.

Could somebody tell me if this delay is "normal"


Thanks to everybody.

I just found the solution. Instead use of:

open driver thePort for write and

and:

open driver thePort for send

You can use:

open driver thePort for update

This let you to send and receive data without closing the driver.

Hi itzalak2,

welcome to the forum!

For your info: I just deleted the double posting.
Please only one posting for one question, thanks!


Best

Klaus

What does "thePort" refer to?

My computer has more than one USB port, so how do I know through which port to pump the data?