What does LightBurn expect for Grbl TelNet welcome message?

LightBurn Hardware Compatibility
1

Hi LightBurn Team,

We are trying to setup a wireless connection between our laser and LightBurn, using a TelNet server on the laser.

LightBurn is able to connect to the server without issue. When I start the TelNet server, The Laser tab goes from “Disconnected” to “Ready”. However the console is still saying “Waiting for connection…”. On the server side, I keep receiving “G0”.

I know for a wired serial connection the GRBL welcome message “Grbl 1.1h [‘$’ or ‘$HELP’ for help]” or similar takes things out of this state. However this doesn’t seem to work for the TelNet connection.

What message(s) is LightBurn expecting to receive in order to confirm a connection has been established? Is it a series of IAC messages perhaps?

Cheers,
Leo, Roly Automation

2

I can’t help with the details, but maybe check out FluidNC, it offers Telnet communication and works fine with LightBurn (I tested). The source code is Open Source…

3

Turns out “ok\n” does it. “ok” does not which was the first thing I tried. You need the new line character. Two hours well spent lol.

1 Like
4

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.