public function sendMessage($str, $waitForReply = 0.1)
    {
        $this->_buffer .= $str;

        if ($this->autoFlush === true) {
            $this->serialflush();
        }

        usleep((int) ($waitForReply * 1000000));
    }
public function sendMessage($str, $waitForReply = 0.1)
    {
        $this->_buffer .= $str;

        if ($this->autoFlush === true) {
            $this->serialflush();
        }

        usleep((int) ($waitForReply * 1000000));
    }
public function sendMessage ( $ str , $ waitForReply = 0.1 ) { $ this -> _buffer .= $ str ; if ( $ this -> autoFlush === true ) { $ this -> serialflush ( ) ; } usleep ( ( int ) ( $ waitForReply * 1000000 ) ) ; }
Sends a string to the device

@param string $str          string to be sent to the device
@param float  $waitForReply time to wait for the reply (in seconds)
Sends a string to the device