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8.2.3.9. Transmission timeout
Function
- Defines waiting time (in seconds) for confirmation of reception
of sent data frame.
Data type
- number
Range
- 0....655 [s]
Default value
- 12 [s]
Comments
- This value in connection with declared Number of GPRS
transmission retries defines max. time of one data packet
transmission, described by formula:
MaxT
= (
number
of
GPRS transmission retries
+1)*transmission
Timeout
For default values: MaxT = (3 + 1) * 12 = 48s. Please notice
that calculated value does not define the time of delivery but
the time to elapse before the module considers that
transmission to appointed IP address is not possible (the data
will be lost due to unavailability of recipient) and moves to
sending next data frame awaiting transmission.
8.2.3.10. Idle time
Function
- Defines the interval (in seconds) for sending data frame (ping)
controlling the ability to communicate with the network in case
of transmission inactivity
Data type
- number
Range
- 0....86400 [s] (24h)
Default value
- 240 [s]
Comments
- in case of inactivity longer than the value defined in this
parameter the module sends a control frame in order to check
whether transmission is still possible. During network check,
control data frame is sent to module's own IP address,
respecting timeout and number of retries parameters. The
length of the frame is 45B+length of the module's name. The
frame is sent to module's own IP address or to the address
defined in parameter GPRS testing IP address, if different than
0.0.0.0. In „Proxy” mode, the frame is sent to Proxy server IP
address.
No reply to sent frame after exercising defined timeout and
number of retries is considered as transmission failure and sets
triggering input FS1_gprs 0--> 1, that can be used for Rules
processing (SMS sending). As a consequence, after elapsing of
time defined in Wait time after disconnection, the module
performs RESET and commences GSM/GPRS login sequence.
Reduction of this parameter increases the frequency of testing
GPRS network state. This shortens possible disruptions of
control due to network failures but increases "unproductive"
data transmission.
8.2.3.11. GPRS testing IP address
Function
- sets IP address where data frames testing GPRS network state
are sent.
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