I’m using DietPi (http://fuzon.co.uk/phpbb/viewtopic.php?f=8&t=6) for my Raspberry.
Pimatic works great so far on this reduced distribution.
DietPi uses Ramlog for the logfiles (all logs go to RAM), so it would be great to set the log file path of “pimatic-daemon.log” in the configuration (config.json).