Hi, I could really use some help on this. I can send one hex number (41) with the code below. But I dont know how to send a string ec 0x41, 0x42, 0x42, 0x41, 0x41, 0x42, 0x41, 0x42. Any help would be much appresiated ;Include the Serial UDF #include 'CommMG.au3' ;Internal for the Serial UDF Global $sportSetError = '' ;COM Vars ;_CommSetPort($iPort, ByRef $sErr, $iBaud = 9600, $iBits = 8, $iPar = 0, $iStop = 1, $iFlow = 0, $RTSMode = 0, $DTRMode = 0) Global $CMPort = 3 ; Port Global $