Shelly1

UserGuide: https://shelly.cloud/wp-content/uploads/2018/10/Shelly1_User_Guide_EN_v5.pdf

Shelly1 uses the following topics:

• shellies/shelly1-<deviceid>/relay/0 to report status: on or off
• shellies/shelly1-<deviceid>/relay/0/command accepts on and off and applies accordingly

Additionally, SW pin state is reported on shellies/shelly1-<deviceid>/input/0.