You can tie the espadrilles in many ways and use the same technique in all of them regardles they are wedges, sandals or flats.
Once you master this technique you can naturally tie them in any other way easily. The trick is to make sure you get the first three steps right.
Here you can see how to tie the traditional espadrille sandal 'Pinxo'.
The espadrille 'Valenciana' is also similar to tie. The V form will depend on your preference. Don't tie the espadrille to tight if you want a prominent V at the front part of the espadrille.