Comm port missing, Arduino mega + ramps 1.4

[jesus zalba]

Hi, I’m using a mac and an arduino mega with ramps 1.4.
When I try to connect the computer I can´t select any port, the ‘list’ is empty, and I can see a warning in the console:
“…
020-12-03 20:37:11 starting GUI…
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.jogamp.common.os.NativeLibrary$3 (file:/Users/jesuszalba/Desktop/Makelangelo/Makelangelo/Makelangelo-7.23.0-with-dependencies.jar) to method java.lang.ClassLoader.findLibrary(java.lang.String)
WARNING: Please consider reporting this to the maintainers of com.jogamp.common.os.NativeLibrary$3
WARNING: Use –illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
…
”
Do you know what ca I do?

[Dan]

Does this help? I just added a section for linux/osx
https://mcr.dozuki.com/Guide/How+to+update+Makelangelo+firmware/4#s356

[jesus zalba]

I don’t know if this is important, but with other app. I haves detected this:
Removed : wchusbserial410
———————
———————
Added : wchusbserial410
———————
———————
Removed : wchusbserial410
———————
———————
Added : wchusbserial410
———————
———————
Removed : wchusbserial410
———————
———————
Added : wchusbserial410

I thing there is an issue and the port is restarting

• This reply was modified 3 years, 11 months ago by jesus zalba.

[jesus zalba]

Hi, I know what is the problem but I don’t know how can I solve.
I tried to connect with ‘universal gcode sender’ and it had the same problem but if you write the name of the port in the selection list it is able to connect with the arduino.
The problem is in the communications library, it does not recognize all port names.
So I think you can solve the issue if you put a text area where we can write the port name.

The real problem, I think, is the serial chip in some arduino boards. If the serial port is named like the standard there is not problems.

Thanks a lot.

[jesus zalba]

sorry but it doesn’t work.
The name of this port is:
/dev/cu.wchusbserial410

and I can see this

ls -l /dev/cu.wchusbserial410
crw-rw-rw- 1 root wheel 17, 9 4 dic 16:46 /dev/cu.wchusbserial410

and with the terminal in arduino soft works fine:

HELLO WORLD! I AM ZARPLOTTER #0
Firmware v10
Built Dec 4 2020 16:45:21
== http://www.marginallyclever.com/ ==
As well as the following G-codes (http://en.wikipedia.org/wiki/G-code):
G00,G01,G02,G03,G04,G28,G90,G91,G92,M18,M100,M101,M114
Has LCD

[Dan]

Well then I’m not certain why it’s not working. In the past it’s always your user or your java does not have permission to access the serial port. The question now is how do we debug this?

what model mac? what os version?

[jesus zalba]

I have read this is a problem with the jssc library and the chinese arduino boards. With a different usb serial adaptar (ch340).
I have tried with an arduino original and it works.
The Arduino ide detects both because, i thing, it use a different versión of the jssc.jar (jsscarduino.jar???)

https://stackoverflow.com/questions/18261996/java-simple-serial-connector-jssc-no-ports-detected/18321865

[Author]

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