Sends an explicit extended code with data. This command is only useful for specific X10 devices and interfaces. It will do nothing for any other device or interface type.
xtend (text, unit name)
[data integer] 8 bit data value from the X-10 Extended Code Documents
[command integer] 8 bit command from the X-10 Extended Code Documents
xtend "LM14" data 1 command 59