Get it directly from Plaato here.
Enable Plaato Airlock in the Brewfather Settings
Copy the Logging URL.
Open the Plaato App
Go to WEBHOOK tab
Paste Logging URL.
Wait up to 30 minutes.
Plaato should then appear in the Device page in Brewfather
Attach the Plaato device to your Batch (fermenting tab)
This works out of the box, just make sure the device name is unique per Plaato and they will all appear in the device list as separate entities. All will use the same webhook url.