User manual

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3 specify the TTL value of the socket connection to <parameter>. The value can be set from 1 to 255.

default value is 64.

4 specify weather to use ping function to check Internet connectivity:

<parameter> is the period in second of calling ping function after GPRS connected (+IPCONNECT: 1,1)

<action> is to specify the action will be taken if a set of ping action fail :

0: do nothing (default)

1: disconnect GPRS (+IPCONNECT=1,0)

2: reset Maestro

5 specify a set data to be send over the TCP/UDP connection to remote peer when it is just made. This can be used

as a identifier to the remote party.

<conn_str> is data to be sent when connection is just established. Data is entered in hexadecimal format (01 to FF).

Maximum 60 bytes can be set.

Note :

- Before enabling periodic ping action (+IPOPT=4,1,…) be sure to setup Ping parameters properly. See Chapter 6 for

details.

- Periodic ping action is enabled with GPRS disconnection (+IPOPT:4,x,1) then Automatic TCP/UDP connection

should be also enabled, so that those functions will try to re-connect GPRS after disconnection caused by ping fail.

- Period of ping action should be set larger than the maximum time of one set of ping action.