Update sonoff.py

[AviPaperno]

Fixed error with get_devices()

It returned Error 400

[VDigitall]

I checked a few minutes ago and version in master branch works for me, this pr is redundant.

[muhannad17]

Actually I had the same problem as (Snusmumrick), I managed to get it fixed by adding GET Parameters to the (api/user/device) Request ( find attached code ).

And the commit is necessary for the app to get the devices list. Maybe the api response is country dependant !

sonoff.txt

[ndg63276]

In my testing I found that, when getting the list of devices, by sending params to /api/user/device:

• If you send a 'version' parameter, you get sent back a dict, and your devices are in r.json()['devices']
• If you don't send a 'version' parameter, you just get the list of devices as r.json()

So be careful and consistent.

This PR is pretty ugly though, URL parameters should be sent using the params keyword in requests.get(), not just appending to the URL.