This app was mentioned in 12 comments, with an average of 1.83 upvotes
There is a app actually let me find it for you.
EDIT:
Thank you for the ⭐! There are many other ways to activate assistant:
With ZenWatch 3 you can assign voice search to one of the buttons using mini app Search button for ZenWatch 3.
OK Google works (if enabled) but it is slightly different from your phone. You will have to wake the watch (by tilting it or touch the screen) before it starts to listen for the wake word. You will also need to be on the watch face. If other (ambient mode) apps are active, voice detection is not activated.
Other ways to access Voice Command:
I will have access to a HW2 in the beginning of August (my brother's) I intend to play a bit with it...
If I do anything it's most likely it will be in a separate app, as Bubble Cloud doesn't need any more button presses other than the remapped main button and the existing options that you can assign to the secondary button (open app drawer, start timer on the ZW3). I promised to make a stand-alone remapping app anyway, so these could also become part of the already existing "Search button for ZenWatch 3".
If I get somewhere I will surely announce it here, like in the beginning of August.
Thank you for your offer, but currently I have all the testers I needed. The app seems to work reliably. If you want to try, please purchase it in the Play Store. It will stay to be the lowest price possible. And if you have any problems I am always available to help.
I made this tiny app: <strong>Search button for ZenWatch 3</strong>
I am looking for early testers. This app is only a proxy which calls the default Voice Search app on your watch.
SETUP (screenshots)
Only useful on Android Wear watches with customizable hardware buttons
NO ZW, NO ZW2 :-(
Cannot be assigned to button on watches with one or no button
PROMO CODES
~~This app will cost the lowest price in each country, but I would like to give it for free to anyone who is willing to try it. Please leave a short comment and I will PM the code to you. Please REPLY to this comment so this description can stay on top.~~ I gave away this batch of promo codes, thank you to all testers.
I already received some feedback, waiting for some more. But the app seems to work reliably. If you want to try, please purchase it in the Play Store. It will stay to be the lowest price possible. And if you have any problems I am always available to help.
CONNECTION TO THE WATCH
A few users found that the watch component of the app did not transfer immediately to the watch. Unfortunately it is outside of my control how quickly Android Wear "discovers" newly installed apps... Here are a few things you can try:
Any feedback is appreciated
Use this app, and tell it to launch one of your random system apps in the list (since those won't launch anything).
Check Search button for ZenWatch 3 Does exactly this
Currently it is the home button. There is no way to remap the HOME button in standard Android either.
In W2.0 it will become the back button. Same problem.
But newer watches such as the ZW3 or the LGU2 come with reprogrammable buttons. I guess this will be the new direction. And you can assign those extra buttons to any action you want.