Being in Australasia I would also like to get this going (and have tried your above links in the past also) although I really have no idea what I am doing. Blundering my way through the basics with home assistant let alone stuff like this. Thought I would point out this link though… you may know how to work this one better than me.
Sorry I know it’s 2 years after your post but even if you’re not interested still others like me may still be trying to work it out and find this. Or maybe you even got it going and can help us out?