Neje laser cutter not recognized in lightburn
I have just acquired Lightburn (license key) 1.5.02. On the trial version I had no problems of recognise. However, it is impossible to connect my laser cutter to the licensed version. I get the following message: “Failed to open port - already in use?”
I read what I found on the forum and applied:
test my USB port: it is recognized with a USB key but does not recognize the machine.
test my USB cable: it does not present a problem in another configuration.
uninstall lightburn 1.5.02 and reinstall it: still does not recognize the machine.
delete the config, turn off the machine, close lightburn, turn off the PC, restart everything: still no recognition.
delete lightburn and reinstall lightburn with appimage but same problem
the ch340 driver is ok
the material is ok and work in neje application.
note: lightburn keeps in memory a configuration called ttyS0 without it being linked to a machine or a type of config (grbl, etc.) and which cannot be erased.
system: lubuntu 22.04
laser : Neje master 2 max A40640 module
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 007: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 7392:a812 Edimax Technology Co., Ltd Edimax AC600 USB
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
Bus 001 Device 009: ID 1a86:7523 QinHeng Electronics CH340 serial converter
Bus 001 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
if usb key is connected in usb2
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 007: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 7392:a812 Edimax Technology Co., Ltd Edimax AC600 USB
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
Bus 001 Device 010: ID 0781:5581 SanDisk Corp. Ultra
Bus 001 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
yes i verified the usb lightburn connect with the command
ls /dev/ttyUSB*
/dev/ttyUSB0
the ch340 driver is ok.
if I used in lightburn the grbl-lpc or grbl-m3 in device auto i see in lightburn console : “waiting for connection”
and if I connect to neje application to the laser the material is recognized and works correctly.
Neje - specially the latest ones - should be not under M3 or LPC but Top Grlb controller you should do it by hand
But Lightburn must be able to see it correct too
I cant imagine any reason why your lightburn isnt - now that you enabled license your device
I sugest you delete your current profile, and add a grbl profile by hand
Then select the correct port, and connect
Remember that on Linux there are special instructions for giving $USER
the material now engraves in reverse (in x and y) and I ask to return in home on lightburn, it the machine tries to exceed the y and no stop. but if I press the reset button of the machine it returns correctly to the home of the machine and stop; if I test on neje app, return in home well. note : it is not possible to update the neje firmware on ubuntu (or I have not yet found the solution)
