How to continous send data

Hello,

I'm using the echo application as a starting point (lwip standalone - raw api), and I want it to send data continous, after a specific command from the client is received. However, the application should still be able to receive other commands from the client, while it is sending data.

My application works well with sending some data every time the client send a command, but I can't work out something to send the data continous.

Thanks for help