Yes it is what I am using too (I tried whatever was proposed in domoticz).
Note that I did this
sudo stty -F /dev/ttyAMA0 9600
which probably did something on this AMA0 but I don't know what.

I followed the steps here: https://www.domoticz.com/forum/viewtopic.php?f=28&t=15795&p=117355#p117527 ...

Thank you for your answer.

I tried the rick but it didn't do any good to my problem. Still messages like


2017-11-28 15:07:36.854 Error, contrlr, ERROR: Dropping command, expected response not received after 1 attempt(s)
2017-11-28 15:07:36.854 Always,
2017-11-28 15:07:36.855 Always, Dumping ...

Sorry I followed very carefully all this very good post but it still does not work for me.
I actually did rpi-update. Which firmware are you using I could try to downgrade?

Thank you.

I am using Pi3 with Linux raspberrypi and a RaZberry PI GPIO Daughter Card
Linux: 4.9.65-v7+ #1056 SMP Fri Nov ...