T610 interface with PIC16F877

Hello I have been trying to interface PIC16F877 with Sony Ericsson T610 but i cant. For a start up Iam just sending AT to the phone but i dont receive "OK" Iam using the serial data cable for the phone directly connected to the serial of the PIC

Hi Izzal, Please provide the code will be easy to help..

According to Wikipedia and others,the 610 has Bluetooth ,Infrared and USB.
None of which are practical to connect to a PIC16F877.

I have seen no mention of a serial connection able to connect to a PC's serial port.

ExperimenterUK, PC has got all that where as a tiny 8051 has just got a serial port so thats the only available option

Hello Ajay thanks for your reply

I have attached the code

Sorry the code is as follows

#include <16F877.h>
#device *=16 // This allows auto variables over location 0xFF and set
#use delay(clock=4000000)
#fuses XT,NoWDT
#use rs232 (baud = 9600, BITS = 8, parity = N, rcv = PIN_c6, xmit = PIN_c7)
#opt 9
#include "lcd_driver.c"
#include<string.h>
main (){

char str[3], okay[10];
char c[2];
int i;

 lcd_init();  // Initialise the LCD
 lcd_putc('\f');  // clear the screen

  lcd_putc("WELCOME"); // to test for LCD
  delay_ms(2000);
  lcd_putc('\f');

printf("AT");
putc(13);
putc(10);


for (i=0 ; i<4 ; i++)
{   c[i] = getc();
    delay_ms(5);

}


delay_ms(100);

 for(i=0; i < 4 ; i++)
    {
     lcd_putc(c[i]);     // Show what the phone sends on LCD
     delay_ms(100);
    }
}

ExperimenterUK, PC has got all that where as a tiny 8051 has just got a serial port so thats the only available option

Ajay

I meant was that as far as I can see this phone has no serial port meant for AT command
type communication.
It may have a serial link for flashing and special purposes, but that is not clear from what I have seen.

Of course Izzal's method may be fine, but it is worth checking before going further.

Pinouts says it has serial output, and my friends have used that phone in a project. Also people on forum like Abbas has used it too. So probably it has serial output

The Phone has serial output. I have already tested the AT-Commands using PC (Tera Term software) and it works fine. So after that I tried it with PIC16F877 but i could not communicate. I used MAX232 between the phone and PIC communication when it didnt work I used Transistor circuit but both methods failed.

OK I'm convinced

A couple of points to consider, (actually three).
The 610 interface is 3 volts so may need a low voltage MAX232.
The data bits may need to be inverted.
I have seen the baud rate for the 610 given as 9600 and 115200.
An XP "9600" baud modem actually defaults to a com port speed of 115200.