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millenium7
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Is the FT4232HL serial chipset supported?

Mon Apr 15, 2019 8:38 am

Want to build an out of band serial management solution and so far the RBM33G + This https://www.mwave.com.au/product/starte ... er-ab67056 is the cleanest/simplest solution I can find. I know all the cheap FT232 chipset devices work fine but not sure about that one which is listed as FT4232HL (Strangely enough the 8 port model is FT232 based)

Anyone know if this will work and show up in RouterOS?
 
millenium7
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Re: Is the FT4232HL serial chipset supported?

Fri Aug 16, 2019 6:57 am

Thought i'd post an update to this. The answer is yes its supported (StarTech USB to 4 port RS232 adapter incase link dies) nothing more required other than just plugging it in
Serial sessions can be opened via the 'system serial-terminal port=usb1 channel=' command, channel being 0-3 for ports 1-4 respectively
CTRL+A Q drops out of that session (multiple sessions can be established simultaneously by just opening multiple terminal windows)

However something to note is that it is often VERY slow to open sessions. Pressing enter or CTRL+A does nothing, the terminal window on the hosting mikrotik essentially locks up and can do so for several minutes (and unable to open any other terminal windows). Pretty alarming when you have an outage and your 'backup access' appears to be broken. Just have to leave it for a while
Good news is once the session is open it functions normally so as long as you don't log out of the mikrotik or close the terminal windows you won't have laggy/slow input even when rebooting the other devices

Definitely good as good as a proper dedicated device, but is so much cheaper that its worth it in our case. It is just a worst case backup device that ideally we won't ever have to use anyway
Downside is the host MikroTik can't function as an XMODEM host for sending firmware files etc, but since most (all?) mikrotik's don't support XMODEM to receive firmware either it's not a big deal in our case
 
r00t
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Re: Is the FT4232HL serial chipset supported?

Fri Aug 16, 2019 2:15 pm

For XMODEM and better terminal features, you can use TCP port server (system/ports/remote access).
Then connect with teraterm or any other terminal program you want to use.
Or can even map the port as a virtual COM port on a client PC and using RFC2217 capable client, you can even remotely change baudrate if needed.
Certainly worth trying, maybe the annoying lockup-delay will only happen on server startup and not every time you connect. Must be something specific to FT4232HL..
 
millenium7
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Re: Is the FT4232HL serial chipset supported?

Fri Aug 16, 2019 4:25 pm

Yeah its specific to that chip
The freezing happens every time a channel is opened. And it can also be slow to be recognised and show up under system ports, sometimes up to 10+ minutes
But it does work and is at least $1000 cheaper than a dedicated solution. Good enough for a worst case scenario

Thanks for the tip on remote serial, never used it before. Could come in handy
 
r00t
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Re: Is the FT4232HL serial chipset supported?

Sun Aug 18, 2019 3:26 pm

10 minutes freezes? You must be really patient person to keep using it...
At $160, it's not exactly cheap either. I would just use 4 port USB hub and 4x FT232 based cables that work.

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