Lantronix Hub manual Serial Data, Configuring an Autostart Character for MSS-VIA and MSS4

MSS User Guide 4: Configuration

Autostart can also be triggered by a specific input character. There is no default Autostart character; you will have to configure one. For example, when using Modem Emulation Mode you may want to use A so that Autostart will happen as soon as an AT modem command is entered. Keep in mind that when you configure an Autostart character, you can no longer use <CR> to get to the Local> prompt.

Figure 4-36: Configuring an Autostart Character for MSS-VIA and MSS4

Local>> CHANGE PORT 1 AUTOSTART CHARACTER "A"

Figure 4-37: Configuring an Autostart Character for MSS100

Local>> CHANGE AUTOSTART CHARACTER "A"

Serial Data

Once a connection has been started, several different triggers can be used to transmit all accumulated serial data to the host. These options are controlled with the Change Port Datasend command. The datasend process used by the MSS balances network traffic with latency concerns.

One kind of trigger can be set by specifying a “timeout” condition of either the time since the last character was received (with the Timeout Idle parameter) or the time since the current character burst was started (with the Timeout Frame parameter). For example, to trigger data transmission 150 milliseconds after the current character burst began, enter the following command:

Figure 4-38: Transmitting Serial Data with Trigger Delay for MSS-VIA and MSS4

Local>> CHANGE PORT 1 DATASEND TIMEOUT FRAME 150

Figure 4-39: Transmitting Serial Data with Trigger Delay for MSS100

Local>> CHANGE DATASEND TIMEOUT FRAME 150

The examples in Figure 4-38 and Figure 4-39 can be visualized as: x x x xxx xx (data) x x xx xxxxxxxx xx xxxx xx xxxx

-------------------------------------------------------
150 milliseconds	transmit packet

Another option is to set a one- or two-character trigger that will cause the MSS to transmit the data. You can also specify whether the trigger characters will be sent to the host as part of the serial data or whether they should be discarded (the default). For example, the following commands will cause the accumulated serial data to transmit as soon as the “Z” character is detected in the data stream and to send the matched character (“Z”) to the host as part of that data.

Figure 4-40: Transmitting Serial Data with a Character Trigger for MSS-VIA and MSS4

Local>> CHANGE PORT 1 DATASEND CHARACTER Z

Local>> CHANGE PORT 1 DATASEND SAVE 1

Figure 4-41: Transmitting Serial Data with a Character Trigger for MSS100

Local>> CHANGE DATASEND CHARACTER Z

Local>> CHANGE DATASEND SAVE 1

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