I am working on a project in which a microcontroller needs to transfer data to a computer over a modem and telephone line. I will be using a microcontroller that has a built-in UART (8051 family, AT89S53). I am looking for the easiest way to do this.
I don't know much about serial communications and I don't have a lot of time to learn it. I was hoping it would as easy as connecting a few lines between the microcontroller and the modem. Then just sending modem commands (AT commands) and data over the microcontrollers UART to the modem, and have everything else know what to do.
Does anyone know of a very simple modem IC to do the job? Even using a regular external modem may do the trick. I've seen a few "modem" ICs but they have like 40+ pins. I was hoping for something much simpler. Is there some other easier way to accomplish this? Does anyone know of any good tutorials or other information on interfacing a microcontroller with a modem IC?
Thanks!
Matt
I don't know much about serial communications and I don't have a lot of time to learn it. I was hoping it would as easy as connecting a few lines between the microcontroller and the modem. Then just sending modem commands (AT commands) and data over the microcontrollers UART to the modem, and have everything else know what to do.
Does anyone know of a very simple modem IC to do the job? Even using a regular external modem may do the trick. I've seen a few "modem" ICs but they have like 40+ pins. I was hoping for something much simpler. Is there some other easier way to accomplish this? Does anyone know of any good tutorials or other information on interfacing a microcontroller with a modem IC?
Thanks!
Matt