when i transmit a string through serial from a gui i created It keeps sending repeatedly. How to make it to send only once?

I made a gui in matlab where it takes an input string and transmits through usb serial communication to another usb serial port. But when i send i am able to see that the string keeps on getting transmitted until i end the connection. how to solve this problem?

Answer 1

[Paramesh]

Use conditions.like if and else ,if condition is true,output will be sent otherwise not send