In order to wake your phone and unlock the screen you'll need Security Settings or a combination of Security Settings, AutoNotification and AutoInput (for lollipop).
Now you can start a voice screen in your wear device and say something like search [track] <name of the track>, you can say search track, song, playlist, artist or album. It also works in spanish "buscar" canción, lista de reproducción, artista o album.
- Download and import this proyect to tasker.
- If you have Lollipop and your lock screen security is set to slide (or you have a trusted device) go to the proyect you just imported and enable the profile named "AW Spotify Play Lollipop". (This wakes the device, creates a notification and cliks on it, unlocking the device).
- Otherwise enable "AW Spotify Play", this works with any lock screen security. (If you have lock screen security set in lolipop this profile still works but can cause instability).
- If you don't have a lock screen security enable "AW Spotify Play No Keyguard".
You then get a list screen with the search results on your watch, click on the one you want and it will start playing.