To integrate with Opencart platform, you need to download the integration package by going to Settings-->Integration section. Click the Opencart icon and then click the "Download package in point 1" button.
Log in to the Admin Panel.
Then from the side menu choose "Extensions > Installer".
Upload previously downloaded package
Go to Extensions and form selector choose "Modules"
Find edrone Module and click install
After installation, click on edit. Enter the App_id and App_secrect that you find in point 3 of the instructions in the platform and click "Save"
Now go to Design -> Layouts
Find "Home" and click edit on the icon
In the "Content Top" section add a new row
Choose "edrone Module"
Click Save in the top right corner
Repeat steps 9 to 11 for checkout, category, and product layouts