SeaSmart.Net Adapter Manual Version1.3
26
PACKING MODE
– Controls how data is retrieved using HTTP GET requests. Received data is stored
in a 64 Kbyte FIFO buffer which is read via HTTP GET (GETNMEAData). Three options are available to
determine how data is retrieved
•
Disabled –
All new data since previous GET is retrieved and internal FIFO buffer cleared.
•
Timeout –
Data is retained for defined milliseconds and old data discarded
•
Threshold –
Data is retained based on defined buffer size and old data discarded.
In all cases, if conditions force internal 64 Kbyte buffer exceeded, the oldest data will be discarded.
N
EWEST
D
ATA RETRIEVED BY
HTTP
GET
AND
INTERNAL BUFFER CLEARED
.
L
ATEST
2
SECONDS OF
D
ATA RETRIEVED BY
HTTP
GET.
I
NTERNAL BUFFER NOT CLEARED
.
The
Tunnel Packing
parameters control how data is retrieved using HTTP Get Requests
(GETNMEAData)
•
Packing Mode –
determines if data is packed before transmission in response to a HTTP GET or
if the buffer is cleared after each request.
o
Disabled –
All accumulated data since the last GET is passed on and the internal buffer
cleared. If a GET request is not issued before the internal buffer is filled, data is FIFO and
the oldest data discarded. The Internal FIFO buffer is 64K Bytes. If a GET request is made
before the buffer fills, then all new data since the last request is returned and the buffer
cleared.
o
Timeout –
specifies to use a Timeout or Threshold value to determine how much data to
return in response to a HTTP GET request. Data is returned and the internal buffer is not
cleared until the Timeout or Threshold criteria are met. This is used to allow multiple HTTP
clients to request the same data set.