First things first, make sure you've got a Trello account all set up and ready to go. You'll need the right permissions to create API keys and tokens too.

1. Head over to the Trello Developer API Key page.
2. Copy the API key you see on the page.
3. Click the link to generate a token.
4. Grant the necessary permissions and copy the token that pops up.

1. Log in to your Adalo account.
2. Hit "Create New App".
3. Pick your app type and click "Create".

1. Open up your shiny new app.
2. Go to the "Database" section.
3. Under Collections, click "Add Collection" and choose "External Collection".
4. Enter the Trello API URL, like https://api.trello.com/1/boards/{boardId}/cards (swap {boardId} with your actual Trello board ID).
5. Add query parameters for your API key and token, like:

• key=[YOUR_TRELLO_API_KEY]
• token=[YOUR_TRELLO_API_TOKEN]

1. Click "Add Property" to map Trello data to Adalo.
2. Add properties to match Trello card details (e.g., name, desc, due).
3. Test the GET request to make sure the data is coming through correctly.

1. Add components to your Adalo app to show Trello data (e.g., lists, cards).
2. Bind the data from your external collection to these components.
3. Customize as needed to fit the design and functionality you want.

1. For Create, Update, and Delete operations, set up the respective actions in Adalo:

• Create: Set up a POST request to the right Trello API endpoint.
• Update: Use a PUT request.
• Delete: Set up a DELETE request.

1. Map each action's properties to the expected fields in Trello.

1. Publish your Adalo app to test it in a live environment.
2. Play around with your app to make sure data flows correctly between Adalo and Trello.
3. Fix any issues based on API responses and Adalo log outputs.