Re: Configuration of the RGA200 communication baud rate

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Hi Feng,

I just tried to set the serial port of /dev/ttyUSB0 on my Linux system to 28800 with the stty command.  It did not work, consistent with what you observed.

 ChatGPT says that Moxa terminal servers do support non-standard baud rates.  I tested a Moxa NPort terminal server.  Although it does not support 28,800 as a preset choice in the menu, it does support "Other".  I selected "Other" and entered 28800, and it accepted it.  So this may be a solution for you.

Mark

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of LONG FENG via Tech-talk <tech-talk at aps.anl.gov>
Sent: Sunday, January 11, 2026 11:29 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Configuration of the RGA200 communication baud rate

 

Hi all,

We encountered an issue while configuring the communication baud rate for the RGA200. As you know, the RGA uses a baud rate of 28,800, but EPICS does not seem to allow setting this baud rate. As a result, it reports the following error:  

drvAsynSerialPortConfigure ("RGA200", "/dev/ttyUSB0")
asynSetOption("RGA200", 0, "baud", "28800")
setOption failed Unsupported data rate (28800 baud)

How should this issue be resolved?

Feng