start RTT server from JLink.exe

balance3164 · May 21, 2025 at 2:17 PM New

How can I start RTT server from JLink.exe,

since I'm connected via working interface
and application is already running with "go".

But I don't see the system tray icon and status page won't load http://localhost:19080/rtt.htm

I'm trying to do a monitoring script that connects to existing product, want to avoid any chance of overwrite from IDE.

SEGGER - Simon · May 30, 2025 at 3:45 PM New

Hello,

We are not aware of such an issue. The status page should be available at the start of the J-Link Commander.
To help us investigate, could you please provide a J-Link log file from the failing scenario?
Instructions on how to enable logging can be found here:
https://wiki.segger.com/J-Link_DLL#Enable_J-Link_Log_File

Best regards,
Simon

balance3164 · June 2, 2025 at 5:20 PM New

Hello,

After reboot it worked, I have the web interface, is there a way to start session/emulate pressing this button from jlink cli?

SEGGER - Simon · June 4, 2025 at 12:10 PM New

Hello,

Are you referring to the J-Link Commander with JLink CLI?

If so, there isn’t a direct way to emulate the button.
However, you can use the command-line option -RTTTelnetPort to forward all RTT data to a specified port via Telnet. See https://kb.segger.com/RTT#TELNET_channel_of_J-Link_software.
Once set up, you can view the data in any terminal application. You should also be able to view the same output in a web interface if it is configured to listen on the same port.

Please let me know if this works for you or if you need further assistance.

Best regards,
Simon

start RTT server from JLink.exe

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