Go to Point of Sale > Configuration > Payment Methods
Create new Payment Method
Choose Journal with type Bank
Choose Integration with type Terminal
Select Comgate CloudPOS
Fill the fields:
Comgate Merchant
Comgate Secret
Press Check Terminal Status button
You can find the credentials in your Comgate account. Go to Integration > Your Shop > Terminals. Then you can copy the Merchant and Secret values to Odoo.
Important: Under Action icon setup the enabled IP ranges.
Terminal mode
To use the module, you need to ask Comgate to set the terminal mode to "CloudPOS". Otherwise, the module will not work.