Update README.md

[paalex]

sensor reading already works as well

Description:

Related issue (if applicable): fixes #

Checklist:

• [ ] Code is Python 3.x compatible
• [ ] Travis is passing tests Your PR cannot be merged unless tests pass
• [ ] No PEP Bot Errors or Issues

[krisgesling]

Thanks for the update @paalex! and to Stratus for testing :slightly_smiling_face: