On 16/11/2019 10:34, Tony van der Hoff wrote:
> Hi,
> I'm using a headless pi1B to control some relays. One of these is
> connected to GPIO14 (Pin 8). I'm finding that it jitterss rapidly on
> boot, then settles down. I suspect that this behaviour is caused by its
> secondary UART function, which I don't use. Is there any way to suppress it?
>

Well, I've figured it out for myself. For anyone finding this from a
search engibe, it is due to a serial console coming up on boot. To disable:

sudo raspi-config -> Interfacing Options -> Serial -> No login Shell ->
No enable serial hardware

--- SoupGate-Win32 v1.05