Yeah, I think your entity_id is wrong for your configuration. I.E. spelling error on the sensor entity_id. Because there’s no way you should be getting null as a response from my template.
for shits and giggles uncomment this line and look in the chrome logs (F12):
I don´t undestand, nothing is displayed. I have modified the first part because in “config UI” I don’t know where to put the code “lovelace_gen”. Just tell me this:
Yeah, sorry. I can’t help with the UI editor. I’d need to see the full yaml code and an actual error associated with it. The rex box is not displaying and error. It’s displaying the code.
@petro
I’m just wondering…
Do your graphs show on the first time a tab is displayed?
I’m finding that they don’t until I go back to that tab a second time.
It seems to be repeatable. Pressing F5 makes the graph line disappear but going to a different tab and back again makes them reappear.
I just wondered if it was something you’d ever come across?