So i´ve just had to went through the post to check how to enable Flexi readings in Metr.
Firstly i connected a charger to awake the Flexi to check if Can readings are there in Metr. Worked like a charme.
Then i enabled Wake on Can via Metr in the Flexi settings, also set Stay Active time to 1 (hour).
Would be nice to have a small tutorial to get that workin in Metr @rpasichnyk with Wake on Can