Can't connect with Pro Plus 2 on Fedora 20

[Jef Driesen]

On 2014-09-30 09:40, John Williams wrote:
> Firstly, thanks for your work on this very useful software!
> 
> But, I've tried using the vtpro and universal clients to connect to my
> Pro Plus 2 on Fedora 20, but get the undesirable response below.
> 
> I've followed the instructions to execute:
> 
> modprobe ftdi_sio vendor=0x0403 product=0xF460
> 
> and also put
> 
> options ftdi_sio vendor=0x0403 product=0xF460
> 
> in /etc/modprobe.d/options
> 
> The device is owned by root, and has group dialout. My non-root user
> (john) belongs to this group.
> 
> Is there anything else I can do to track down the cause of this error?

This looks fine to me. If the /dev/ttyUSB0 device node appears, the 
driver is loaded and working.

> (And yes, my Pro Plus 2 displays "PC" and executes the 120 second
> countdown.)

That looks good to.

> ============================================================
> [john at lounge Downloads]$ ./universal -b vtpro /dev/ttyUSB0
> DATETIME 2014-09-30T07:34:17Z (1412062457)
> VERSION 0.5.0-devel (6845d9b77c81185a50a855c73a9c9f7989ad434c)
> Opening the device (Oceanic Versa Pro, /dev/ttyUSB0).
> ERROR: Failed to receive the answer.
> [in ../../source/src/oceanic_vtpro.c:189 (oceanic_vtpro_init)]
> ../../source/examples/universal.c:681: Error opening device.
> Result: Timeout

I suspect you may have a "Pro Plus 2.1" instead of a "Pro Plus 2". If 
that's correct, then you need to use the newer atom2 backend instead of 
the vtpro backend.

Jef