将套接字响应作为十六进制字节

如何作为缓冲区二进制响应?

sock.on('data', function(data) {
        console.log('DATA ' + sock.remoteAddress + ': ' + data);
        let response = new Buffer("0000", "base64");
        setTimeout(function() {
            sockets.forEach(function(sock, index, array) {
                sock.write(response);
            });
        }, 3000);
    });