Re: SMS thru 5110 using a PIC

[Phil Seakins]

At 07:11 AM 09/05/02, you wrote:
>hi
>
>i am working on a project wherein i have to interface a micocontroller with
>a Nokia 5110, using the COM2 port of the RS-232 interface,  such that the
>microcontroller is capable of sending and receiving SMS messages. I wish to
>use the FBUS protocol, but i am not clear about its interpretation. Can
>someone please help me regarding this?

Interfacing to a Nokia 5110 is hugely problematic.  The protocol is complex 
and only partially documented.  By comparison, the Ericsson T10 (for 
example) with its simple "AT" protocol is so much easier and cheaper and 
only needs 9600 baud.  The serial baud rate on the Nokia is 115,200 which 
means the i/face HAS to be interrupt driven on a microcontroller.