I have Built a very simple panic button system and would like to know how I can build a circuit to add an SMS communicator onto it. I have considered purchasing a premade unit but all my web searches return results of Bulk SMS equipment and not a unit that I can pre program a message into and it will send it to one or a few separate cell phones.
A circuit diagram or a link to a circuit diagram or supplier would be greatly appreciated.
A circuit diagram or a link to a circuit diagram or supplier would be greatly appreciated.
