Hi Rob
No...I was primarily directing my
comments to Rick Hatton....sorry for any confusion.
BTW, the FT991a is very easy to
interface to, requiring only a usb cable.? So, while you can
create a viable interface using GPIO pins, there's no need for
anything else with a Raspberry Pi and the FT991a.? Irregardless of
interface choice, however, ferrite cores and good grounding
methods are really good ideas.? I've seen the problem Rick is
having with the rig hanging in transmit due to rf getting into the
usb cable and causing problems. Not saying that this is what's
causing his issue, but it's a possibility.
73
Keith/KI5US
On 7/20/21 4:19 PM, Rob Giuliano via
groups.io wrote:
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Keith,
Are you asking me?
Or are you just replting to
the wrong part of the thread?
I have never had an issue
with PTT being stuck when using USB to TTL serial
converters.
I have used the DTech FTDI
with the 6-pin header connector, several brands of the cheap
CP2102 boards, and most recently tried one of the USB to
UART/SPI/I2C boards (CH341A).? The board you choose must
have "at least" the RTS/CTS pins.?
I typcially make sure they
have all the serial interface pins so I have "lots of
options".
On my Linux machines (Pi I
use GPIO) I typically use /dev/ttyUSB# -RTS? where
# is the USB device number.
Most often I use a udev
rule to rename the device to make life easier.
On Tuesday, July 20, 2021, 3:31:20 PM EDT, Keith
<geek4096@...> wrote:
Hmmm...what
HAMLIB version are you using?
Also,
are you using feritte cores on your USB cables, rig
properly grounded, etc?? If not, the RF from the rig
can produce unpredictable operation.?
K
On
7/20/21 3:22 PM, Rick Hatton wrote:
On Tue, Jul 20, 2021 at 08:07 AM, Rob Giuliano
wrote:
Keith provided the specific line
for the radio and how it should be configured
for the virtual ports.
.
I was working off physical serial
port devices that I have used for PTT.?
I have used different USB to serial
TTL devices for PTT using FTDI or other chips.
?
I would go with Keith's advice!
PTT
/dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_00C98A2F-if01-port0
does not key the radio.
PTT
/dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_00C98A2F-if01-port0
RTS keys, but does not unkey the radio.
Keith/KI5US