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5.6 FTP on Area Monitor
System AMS-8061
5.6.1 Fundamentals
5.6.2 Structure
These commands are used to make settings on the monitoring station so that
the unit can respond with an SMS message containing the corresponding
information or confirmation.
The setting commands are characterized by the presence of the character S in
the string.
As opposed to point-to-point Modem connection, which needs that both
uploader and downloader are connected at the same time, GPRS via FTP
mode works instead on a server way. Indeed, the monitoring station
regularly stores all data on a server while a client application can retrieve
them later on. This means there is no necessity to be on-line at the same
time.
Moreover, more clients can share the same data as all data are stored in a
server and stay there until they are deleted (by a client).
The method used is FTP.
Similarly to MODEM GSM schedule, which dials a remote Modem number
stored in AMS-8061 telephone directory, GPRS establishes a connection
using Provider Name, Username etc. stored in its memory.
Basically, at schedules, the AMS-8061 regularly establishes, via GPRS, a
connection to the server and through FTP:
•
First it loads, if any, all the (new) settings which have been written
by the (client) application.
•
Then it writes all data that have been requested by the application.
•
Finally it erases all previous required settings in order to avoid
reloading them at the next connection. Note that data related to
field measurements are never deleted by the station.
After that the connection is terminated.
Although the AMS-8061 can operate in both modes, MODEM and GPRS, it
cannot do it at the same time. This means that a setting command is used
to configure the AMS-8061 to work either via MODEM way or via GPRS.
All data exchange is done on the directory named as the serial number of
the monitoring station itself. That is in order to avoid having multiple
stations that store on same directory and, at the same time, having a
unique location. Here, an example of directory structure:
FTP_Root
000WE80201
17_08_01_07_09_.D61
000WE80202
\
The User must ensure that the directory is already present on the FTP
root as the AMS-8061 will not create it.
8061.CFG
8061.set
8061FLD.TXT
8061.CFG
8061.set
8061FLD.TXT
20_00_01_07_09_.D61
SMS Messages and Commands
5-25
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