If no communication is received from the remote connection in the specified time, the modem should gracefully attempt to close the connection. Default timeout should be two minutes. Valid range is 10 to The serial interface commands allow for proper matching of serial port speed, character framing, and flow control. This command determines the flow control interface.
The parameters include hardware, software, or no flow control. This command configures the desired Host to Modem interface. This parameter determines the behavior of the ATD command. The command allows for automated PAD initiation. This command controls the ability of the modem to automatically context activate. The PAD feature will not function properly if the configuration is not followed. Once disconnected the modem will return to AT command mode. Proper analysis of terminal device requirements and application timing and control are required to fine-tune the UDP PAD for proper operation.
Some experimentation may be required adjusting command settings to gain the best configuration settings for a particular solution. Each terminal device will have unique requirements and time should be spent in testing various configurations.
Simple and reliable din-rail serial to Ethernet converters, suitable for indoor and outdoor applications. Din Rail Serial to WiFi converters are suitable for remote monitoring environments. Simple and reliable serial to Ethernet Converters are suitable for indoor and outdoor applications. IOT modules can realize the transmission and reception of wireless data between things, link the perception layer and the network layer of the IoT.
IoT gateways can perform protocol conversions to connect networks with different network protocol technologies. USR IOT's industrial serial to Ethernet converters ensure reliable serial-to-Ethernet connectivity when operating in harsh environments. Now if the connection gets broken for other reasons due to power failures, GSM network etc the client needs to be able to connect with the module again.
The module must detect broken connection and must act so the client can reconnect to it again. In order to detect broken connection the module send periodically some dummy data to the client and check if that data was received by the client. If not, the tcp connection must be re-established. Should I close the current TCP connection, and open a new one, meaning listening to port again?
Should I close the current TCP connection and trying to connect to the port and ip of the client as provided from the last valid TCP connection? The point is that the module must be available as soon as possible to answer to client's requests; that it is why I need the TCP connection to be functional as soon as possible. Thank you. I am new in TCP stack so I may have used technical terms with improper meaning. Ideally the clients should be concerned about the connectivity to the server.
Clients come and go. Server should continue to listen on the port. Server shall just determine that the connection is gone and close the socket for that connection alone. No need to try listening again. The listen done in the beginning should still hold good. The server will be least concerned about the client port. It cannot connect to the client.
Rather client should re-connect to server. So have the intelligence built in client to find the broken connections and to re-establish the connection with server.
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