Hello,
I have an arduino uno and want to control an outlet with a 433 Mhz emettor. Would you have a program to send a signal like : "FE 4A 23 D 8 0 98 F9" ?
Sure - VirtualWire library.
What do you plan to use as a receiver? Your custom 433 receiver with relay?
Or maybe you could look in to RC-Swicth library and use a manufactured receiver to avoid handling the high voltage.