Bridge is just another way of sending a vPin command… so as far as the device is concerned, it just gets the data from the server… no idea if via App, Bridge or API.
As with most any other widget, the only true feedback is by sending a follow up message back. Usually to the App, or with notification, but in the case of Bridge, being from a different project, you need another Bridge pointing back to the ‘sender’.
Read this topic for more…