Let me complete the example given for the node when you use V_IR_SEND.
In order to send IR codes you need to transform the
code in an unsigned long:
char ircode[11] = {0}; // in case your code takes the form of 0xE0E0FF0F
...
if (message.type == V_IR_SEND) {
String hexstring = message.getString();
hexstring.toCharArray(ircode, sizeof(ircode));
...
// get the code as an unsigned long
unsigned long code = strtoul(ircode, NULL, 0);
// with IRLib send the code to TV
sendSAMSUNG(code);
...
Very simple, ** but is hard to find an example**!