* Hourly rate of Gas consumption. Use proper unknown state. * Import unknown state constant. * doh * Cleanup device add. * Fix lint. * Add test for derivative calculation. * Remove conflict. * Document and move calculation into update call.
* Hourly rate of Gas consumption. Use proper unknown state. * Import unknown state constant. * doh * Cleanup device add. * Fix lint. * Add test for derivative calculation. * Remove conflict. * Document and move calculation into update call.