Keepalive; Timeout Restart; Clear Cache - Ebyte E180-DTU User Manual

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Chengdu Ebyte Electronic Technology Co.,Ltd

3.3.6 KeepAlive

Keep-Alive is a mechanism for detecting dead connections in TCP connections. When users does not send any data,

TCP link will periodically send "Keep-Alive" information to maintain the idle link, avoiding dead connections

consuming unnecessary system resources. This setting is valid under TCP. Users can customize the Keep-Alive switch

and other parameters.

Keepalive parameters:

Time: Start probe message after how many seconds the TCP link has no data message transmitted ;

Intv: Time interval between the previous probe message and the next probe message;

Probes: Maximum number of probe failures. When the number of sniffing failures reaches this number, TCP

connection will be disconnected.

Timeout restart (no data restart) function is mainly used to ensure the long-term stable operation of E180-DTU

(ZG120-ETH). When the network port cannot receive data for a long time or the network has not received data for a long

time, E180-DTU (ZG120- (ETH) will restart after exceeding the set time so as to avoid abnormal conditions affecting

communication. The timeout restart can be set via the web page. The normal working time of this function is set to 60 ~

65535S, and the default value is 3600S. 0 is off,and it returns to the default value when the setting exceeds the range.

When TCP connection is not established, the data received by DTU will be placed in the cache area. E180-DTU

(ZG120-ETH) receiving cache is 2Kbyte. After TCP connection is established, the network cache data can be set to be

cleared according to customer needs.

The device has two cache areas, namely the serial data cache area and the network data cache area. When SOCKET

clear cache function is enabled, only the cache data of the relevant SOCKET link will be cleared and the serial port cache

data will not be cleared.

E180-DTU(ZG120-ETH)User Maunel

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