Re: Likely issue with ch341 kernel-module/driver

From: Ajay Garg
Date: Thu Aug 27 2015 - 04:27:17 EST

Hi John.

On Thu, Aug 27, 2015 at 1:07 PM, Johan Hovold <johan@xxxxxxxxxx> wrote:
> Try to see if you can get the device to work reliably with some other
> driver (vendor driver or other OS) to rule out a broken device.

I tested the serial-usb adapter using a loopback-hardware-tool
(confirmed to be perfect).
Using this, I see what I type, echo it back, and see what I receive.

The putty session-settings are standard one - 9600, 8N-1, no parity.

The byte flow is
putty-on-laptop => usb-interface => serial-interface => loopback =>
serial-interface => usb-interface => putty-on-laptop.

Thereafter, following are the echo-sequences I see ::

a ==> 0
b ==> '
c ==> N

This (I guess) confirms a problem on (at least) the driver-side.

Thanks everyone for the quick replies so far, I am grateful.

Thanks and Regards,
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