How can I make GPS control my lawn mower

You are storing a list of your coordinates in global variable LatLon
To send several coordinates convert the list into a table in csv format using the list to csv table block and sent that
Don't forget to remove the items from the list you already sent...

Learn to work with lists and how to debug your blocks

Use the companion app and Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools

Taifun


Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.