To send a message a 'Hello World' from your device to the network, you can use the commands below.
Open a local socket (sock ID is returned)
Now you can send your message
(11 is referring to the amount of bytes and the strange string stands for 'Hello World' in hex.)
You have to execute the last command twice. The first message will be considered as a registration message, so the it will not be forwarded to the GUI.
After sending this message twice you should be able to retrieve the message in the project page of your starterkit. You can copy the paylode and decode it (back) to ASCII at https://www.rapidtables.com/convert/number/hex-to-ascii.html.