Campbell CR3000 Micrologger, Operator'S Manual

Page: 435 / 644

Section 8. Operation
435
c) When prompted, set the archive format to “Gzip”.
d) Select OK.
The resultant file names will be of the type “myProgram.cr3.gz” and
“CR3000.Std.25.obj.gz”. Note that the file names end with “.gz”. The ".gz”
extension must be preceded with the original file extension (.cr3, .obj) as shown.
Q: How do I send a compressed file to the CR3000?
A: A Gzip compressed file can be sent to a CR3000 datalogger by clicking the
Send Program command in the datalogger support software
(p. 90).
Compressed
programs can also be sent using HTTP PUT to the CR3000 web server. The
CR3000 will not automatically decompress and use compressed files sent with
File Control, FTP, or a low-level OS download; however, these files can be
manually decompressed by marking as Run Now using File Control,
FileManage(), and HTTP.
Note Compression has little effect on an encrypted program (see
FileEncrypt() in the CRBasic Editor Help), since the encryption process
does not produce a large number of repeatable byte patterns. Gzip has
little effect on files that already employ compression such as JPEG or
MPEG-4.