I am attempting to read the QRG of my ICOM7610 by means of a simple PHP program by having connect the RIG to the USB port. I am using OSX. Different logging system I am using on such an host are working well. When I attempt to send the string \xFE\xFE\x98\xE0\x03\xFD nothing coming back. Here the very trivial program of example <?php $fp=fopen("/dev/cu.SLAB_USBtoUART4","wb+"); if($fp==null){echo "nooo\n"; exit(0);} fwrite($fp,"\xFE\xFE\x98\xE0\x03\xFD",6); $line=fread($fp,6); for($i=0;$i<5;$i++){ echo dechex(ord($line[$i])); echo " "; } echo "\n"; ?> Any help? 73 de IK4LZH John