Hmm eureka, it's 02 53 = 0x53 Or 02 25 = 0x25... Where could that 02 be from? Cheers! -- View this message in context: http://gambas.8142.n7.nabble.com/Serial-I-O-with-byte-data-tp58933p58986.html Sent from the gambas-user mailing list archive at Nabble.com.