Cinterion
®
ENS22-E AT Command Set
7.8 AT^SISR
ENS22-E_ATC_V01.000
19/02/11
Page 112 of 189
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Indicates end of data. Data transfer has been finished (all data have been read)
and the service can be closed with
0
Indicates that no further data is available at the moment.
>0
Number of available data bytes. The range is determined by
:
If
was greater than 0, then
may be
less or equal to the value requested with
If
equals 0 (peek operator) the value indicated by
may be greater than 1358.
Indicates whether or not data is available for reading with
.
1
Meaning of value "1" for all services exceptTransparent UDP service:
Data is available and can be read by sending the
command. The
URC appears when less data was confirmed (in
requested (with
) during the last "Read Data" operation
and new data is available.
Meaning of value "1" for Transparent UDP service:
If the Transparent UDP service is in AT command mode the "
: x, 1" URC
notifies the client that the server has sent new data. In this case the client shall
enter the
command to go to transparent access mode and read the
data.
2
End of data. Data transfer has completed (all data read). The service can be
closed with
Optional third parameter of the
write command response displayed only if the Socket service uses the
UDP protocol.
The reception of each datagram must be completed before the next datagram can be received. This may be a
problem if the buffer of the host application is limited and not designed to handle the maximum packet size of
1358 bytes. To compensate this, the host is advised to request, via
, an amount less or
equal its maxmimum buffer capacity and wait for the resulting
write command response with param-
. The benefit of this approach is that the host may properly receive all parts
of a UDP datagram, as after each received data part the number of remaining bytes is synchronized, until read-
ing the datagram is finished.
If the currently read datagram is smaller than the number of bytes requested by the host the
parameter is omitted.
.
0
Indicates that all bytes of the current UDP datagram are read.
(max. data size)-1...1
Indicates that the currently read UDP datagram is not yet complete. The dis-
played value is the remaining number of bytes.
is unequal 0 until reading all parts of the cur-
rent datagram is finished.
Service specific parameter of the
write command response. If the Socket service is configured as UDP
endpoint this parameter shows the IP address and the UDP port of the remote host that has sent the current
UDP data. See example in Section
.
<cnfReadLength>
(num)
<urcCauseId>
(num)
<remainUdpPacketLength>
(num)
<Udp_RemClient>
(str)