<?php //$DXPcmd = array(0x55,0x82,0x10,0x31,0x00,0x51,0x96); $DXPcmd = array(0x55,0x82,0x10,0x31,0x00,0x51); $DXPcmd = "558210310051"; $SUM=0; for ($i=0; $i < strlen($DXPcmd)-1; $i+=2){ $SUM += hexdec($DXPcmd[$i].$DXPcmd[$i+1]); } $NOTSUM = ~$SUM; echo dechex($NOTSUM); $CHKSUM = bin2hex(dec2bin($NOTSUM) & dec2bin(3)); echo dechex($CHKSUM); ?>
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