Table of Contents
Advertisement
Chengdu Ebyte Electronic Technology Co.,Ltd.
E90-DTU(433L30E)-V8 User Manual
5.3. Short connection
In client mode, short network connection is supported (this function is disabled by default). TCP short connection is
mainly used to save server resource overhead, and is generally used in multi-point (multi-client)-to-point (server)
scenarios.
The TCP short connection function is applied in the TCP Client mode. After the short connection function is turned
on, it only requests to connect with the server when sending information. The device will automatically disconnect.
When the short link hold time is set to 0, the short link function is turned off. When the setting range is (2-255)
seconds, the short link function is turned on, and the default hold time is 0 seconds (short link is turned off).
5.4. Network disconnection and reconnection
In client mode, after the device is disconnected from the network, it will try to actively connect to the server at the
specified time. If the request times out and the set number of reconnections has not been successfully reconnected,
the device will restart to prevent the device from disconnecting from the network. Unable to restore connection.
Disconnection and reconnection time: The time interval between each attempt of the device to re-establish the
network.
Number of reconnections: The number of times the device tries to re-establish the network, and the cumulative
number of requests reaches the preset value. If the connection is not successful, the device will automatically
restart.
The actual restart time is the network disconnection reconnection period multiplied by the number of reconnections.
It is recommended to use the factory default parameters without special requirements.
5.5. Restart after timeout
Support timeout restart function (default: 300 seconds), this function is mainly used to ensure long-term stable
operation of the device. If data is not sent and received within the set timeout restart time, the device will restart to
avoid the impact of abnormal conditions on communication.
The parameter range of timeout restart time is (60-65535) seconds. If it is set to 0, it means shutdown timeout
restart. The default is 300 seconds.
5.6. Cache cleaning
The device is in the client mode. When the TCP connection is not established, the data received by the serial port
will be placed in the buffer area. The serial port receiving buffer is 1024 bytes, and the data larger than 1024 bytes
will cover the earliest received data. After the network connection is successful, you can Select to clear the serial
port cache or send the cache through the network through configuration.
Enable: The device does not save the data received by the serial port before the connection is established.
Disabled: After the connection is established, the network will receive the serial buffered data.
28
Copyright ©2012–2022,Chengdu Ebyte Electronic Technology Co.,Ltd.
Advertisement
Table of Contents
