[RESOLVED] Onion Omega is not detected on Mac OS X
Just to complement the post with useful information, with proper functional USB cable the output of System Device Manager:
The cable is a regular USB-mini cable that came with my Amazon Kindle. The issue was not related with the USB ports of my computer.
I had this same issue. I found that a mac or pc could detect the onion but the virtual port would not appear when i used a USB cable less than 12" in length.
I found that a mac or pc could detect the onion but the virtual port would not appear when i used a USB cable less than 12" in length.
When i was reading this I had to smile. Anyway I changed mine with a longer one and now it works out of the box also with my Host OS. Strange that the same cable worked with the Virtualbox-guest OS!!
Is there someone who has a technical explanation of this phenomenon?
Hmm haven't had any issues using short cables before, but I do have a theory as to why some small cables don't work:
USB data lines need to be twisted pairs that are impedance matched, I think 90 ohms. (This is especially important when routing USB data line traces on a PCB).
I'm guessing the short cables might have a slightly different impedance than the recommended 90 ohms and that this affects the communication between the USB-to-Serial chip on the Dock and the USB controller.
@Lazar-Demin thx for your answer.
The first article shows the problematic of charging a battery with power loss because of wrong diameter of the cable who transmits the power.
The second article mentions beside power loss, side effects of missing isolation.
Shorter cable are better when they have the right diameter and isolation (inside). Mine (charging cable from my new galaxy tablet) works fine now but makes noise in the speakers. Apparently captures the WIFI signal and transmits it to the USB Bus.
@administrators, might be a good idea to do some tests in the Lab with a maximum of extensions connected. But especially when you start to sell the battery extensions, that they transmit enough energy to load them correct. Probably add one to the online shop could avoid a lot a headache for you :-)
I proposed on Github to add in the get-started tutorial:
ls /dev/tty.*to see if the USB-to-Serial device can be detected. If the driver is successfully installed, you should
*be able to see a device with a name similar to
*If you can't see the device, a old or to long USB cable could be the problem to. If you use a deskdop computer, use a USB connection on the back (on mainboard) or just try a other/newer cable.
Same I proposed for Linux.
Rudi van Drunen
My issue is as follows: got the same problem using the (new) power dock I found in my mail today. Using this dock, I cannot get the tty to show on my mac. Using the same cable, same mac, same software (driver) it works with the mini dock I have here. So I recon my power dock is (partly) faulty. How do I go about here ?
The Power Dock does not have a USB-to-Serial chip so the Omega cannot be detected as a tty. You will have to access the Omega via SSH.
We're going to be putting up a wiki article on using the Power Dock in the next few days.
Also, please read and follow the posting guidelines, your post should be a brand new topic. This way it makes it easier for the team to promptly respond to questions.
Seems like I just had a similar issue - short cable did not work, longer cable did.
My suspicion is that my shorter cable (pulled from my box of cell phone cables) might just have the power wires hooked up and not have all the wires connected.
I am also having trouble connecting to my bricked Omega using serial. I bought a CP2012 breakout, tried using a long USB cable, etc. When I run "screen /dev/tty.SLAB_USBtoUART 115200" I get the same quick 2 error messages about Resources and PTY. I tried running "lsof" and "kill" the process, can't seem to connect. Any ideas? I am using the Power Dock, with the GND connected and the Rx-to-Tx, Tx-to-Rx from the 2102. I am completely stuck, any help would be greatly appreciated.