I would like to configure Odoo to send follow-up messages via SMS informing customers of overdue payments at pre-determined intervals.

I have Odoo 8 installed and have added the account_followup module to notify customers of payments that are overdue.
I also have the odoosms module successfully installed and working.

What I would like to achieve is to bring these two together so that I can send automated followup messages via SMS.

Any ideas on how to accomplish this?