Apologies for the long post, but some progress.

Firstly the problem with the Moonlite movement. I've set up the kit standalone in my 'lab'. Direct USB to Moonlite from MacBook - as before with same messages. Tried from my desktop iMac with same result - to be expected as that is also running Catalina 10.15.2/Kstars 3.3.8, BUT I tried running the indi client on the MacBook and the indi server on a RaspberryPi (Ubuntu 18.04.2) and the Moonlite moves exactly as it should with no errors...
...so the movement issue is for sure not the Moonlite focuser itself, and it does not seem to be indi either. I'm coming to the conclusion that maybe the issue lies with Catalina 10.15.2. The Moonlite is new and I've only used in twice and the first time, about a month ago, it worked OK. The MacBook at that stage would have been on Catalina 10.15.1. This is the only thing that I can think of that has changed. Also since going from 10.15.1 to 10.15.2 my Canon EOS utility for downloading images over USB has stopped working (see this asia.canon/en/support/to-users-of-eos-ut...-for-mac-os-x/notice ). I wonder when/if this gets fixed in MacOS the Moonlite issue will go away??? I'll update when/if this happens.

Secondly, I did notice that the temperature was being displayed as -36C but fortunately the real temperature was about +5C! Now I have the kit in my nice warm room temperature lab set up, I found that the jack plug for the sensor catches slightly on the case on insertion. Now I've given it a solid insertion (!), the display is now reading +23C which is about right. Happy days. Does the temperature operation need to be initialised/calibrated in any way, or should it just work?

Thanks for your assistance.

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