On Sat, 19 May 2018 09:20:52 +0100, Dave Liquorice wrote:

> On Fri, 18 May 2018 00:13:32 +0000 (UTC), Martin Gregorie wrote:
>
>> FWIW the target device is a Dittel KRT2 airband tranceiver.
>
> Have you checked that it setting the hardware handshake lines correctly?
>
There aren't any: the AXE027 USB-serial adapter uses a three wire
connection terminated by a 3.5mm stereo jackplug. I know that's working
correctly because using it lets a RaspberryPi interact with a PICAXE chip
and I have checked that the connections between the KRT2 and a 3.5mm
socket on my panel are good and connect the appropriate pin on the KTR2
to the expected jack segment.

This is why I asking about the adapter's compatiblity with async i/o
managed by poll().


--
Martin    | martin at
Gregorie  | gregorie dot org

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