@dblooom Hi. Sorry for resurrecting this topic, but I can't figure it out at all and haven't found any other resources regarding "Netatmo" and M5Stack on the web. I've tried to fix this issue by replacing "json={'grant_type':'password', ...}" with "data={'grant_type':'password', ...}" and also "data=[('grant_type','password'), ... ] and still had lo luck with it.
I have no problem getting a correct response when working with Postman or directly with Python, but I'm not able to figure out what's wrong in UiFlow.
Would you perhaps have time to elaborate on how you have managed to fix it in "python portion" of the UiFlow if you still remember?
Sorry again for the inconvenience.
Best regards.