How can i send multiple data to one serial port ?

[Mucahit]

Hi all,

I have a project and I want to light two LEDs in this project at the same time. It crashes when I send data to the serial port like this :

serial.write("first led high");
serial.write("second led high");

When I put a delay between two lines of code, my problem is solved but I think this is not correct because this is asynchronous communication.

serial.write("first led high");
delay(5); //milliseconds
serial.write("second led high");

What I want is that the serial port sends another data immediately after sending one data. How can I do that ? I aim to find something like :

serial.write("first led high");
while(serial.busy==true); // wait until the first one goes and send the second one
serial.write("second led high");

[Christian Ehrlicher]

It's a problem of your receiver. Serial communication is a stream so the receiver has to find out where one command ends and the next one starts. So fix your receiver.

[Mucahit]

Thank you, i will check the receiver.