How to send SMS through Telephone

Steps involved:

• Program
• CHECK FOR RING SIGNAL
• SENTING SMS
• DISPLAY THE DIALLED NUMBER
• READ FOR DTMF IC
• DISPLAY ROUTINES
• KEYBOARD EDITING
• STORE IT IN EEPROM
• decode phone number
• Keyboard Routines
• INITIALIZE THE LCD 4-BIT MODE
• SOFTWARE VERSION OF THE POWER ON RESET
• SUB WRITES A COMMAND WORD TO THE LCD COMMAND MUST BE PLACED IN R4 BY CALLING PROGRAM
• SUB TO WRITE A DATA WORD TO THE LCD DATA MUST BE PLACED IN R4 BY CALLING PROGRAM
• SUB TAKES THE STRING IMMEDIATELY FOLLOWING THE CALL AND  DISPLAYS ON THE LCD. STRING MUST BE TERMINATED WITH A NULL (0).
• 1 MILLISECOND DELAY ROUTINE
• ROUTINE TO DIAL THE NUMBER
• SENTING THE CHARACTERS
• DIAL THE NUMBER STORED IN A
• RING RECEIVE PROGRAM
• READ FROM EEPROM AND DISPLAY

Circuits:

Download all in a single file here: