Re: [Hamlib-developer] Question...rigctl timed out on receive, cannot see data from 746PRO

[Brian M. <bd...@fe...>]

On Thu, 6 Apr 2023 17:34:08 -0400
jeff millar <wa...@gm...> wrote:

> Some progress on connecting CI-V USB dongle to IC-746Pro remote port
> 
>    - Tested FTDI CI-V adapter with another radio, IC-9700, same
> problem,
>       - unable to receive responses from radio
>       - oscope show response from radio
>       - So the problem is the USB converter or Linux
>    - Tested with real FTDI, real Prolific 2303 and fake Prolific 2302
> Ci-V converters, none work
>    - Test with QinHeng CH341, success!
>       - initially failed to create ttyUSB0
>       - Internet search said remove braille device package "brltty",
> due to udev rule issue
>       - Now creates ttyUSB0
>       - Works well with both 746PRO and IC-9700
> 
> All these USB to CI-V serial adapters were purchased from Amazon and
> had various Chinese company names.  I looked back through order
> history and can't figure out which of the three ordered is the CH341.
> 
> Any other ideas about why this should be so fragile?

A lot of it is down to clones of the originals, the manufacturers
modified the 'real' devices to try and make them incompatible with the
older drivers and force the fakes out of the market. It led to much
confusion and headache. I don't know how much of that got into other
OSs but it certainly caused trouble for Windows users.

brltty is also a pain, it's hanging around in systems where it will
never be used presumably to make it easier for those that needed
braille displays/keyboards.

Glad you found a fix.

-- 

Brian  G8SEZ