Read & Send SMS from a Mobile using PIC Microcontroller

[aratti]

Chakkarapani, you are not saying much about your hardware. I hope you have used a max3232 to connect the Fbus to the PC otherwise you have burned the Rx line. (Fbus is 3.3 Volts)

http://www.datasheetcatalog.org/data...ts/max3232.pdf

Most of the AT command (not all) works also with Fbus.

Alberto

[abbas.khodaeian]

Hi friends,
I'm in the same way to perform this project with PIC and Nokia 3310.
But i find out the PIC 16F84A only can support the 9600 bps Baudrate and less than it. But the nokia 3310 FBUS, only can support the 115200 bps baudrate.

which PIC micro have this buadrate, that i can connect it to nokia?

we know, to open the bus between the nokia and PIC, we must to send 'U' 128 times. and then the bus is opened to communicate data between them selfs.

any Idea for this? for the same baud rate of nokia 3310 in PIC?

thanks in advanced.

[aratti]

Use a pic 18Fxxxx like 18F2585 for instance, with a 40 Mhz xtal oscillator.

Here the setting for the EUSART @ 115200,n,8,2 (Obtained with Mister E PicMulticalc)

RCSTA = $90   ' Enable serial port & continuous receive
TXSTA = $24   ' Enable transmit, BRGH = 1
SPBRG = 86    ' 115200 Baud @ 40MHz, -0,22%
SPBRGH = 0
BAUDCON.3 = 1 ' Enable 16 bit baudrate generator

Al.

[abbas.khodaeian]

Use a pic 18Fxxxx like 18F2585 for instance, with a 40 Mhz xtal oscillator.

Here the setting for the EUSART @ 115200,n,8,2 (Obtained with Mister E PicMulticalc)

RCSTA = $90   ' Enable serial port & continuous receive
TXSTA = $24   ' Enable transmit, BRGH = 1
SPBRG = 86    ' 115200 Baud @ 40MHz, -0,22%
SPBRGH = 0
BAUDCON.3 = 1 ' Enable 16 bit baudrate generator

Al.

hey dear atari, thanks for ur replay, but i need 115200 baudrate, 8 bit data, no parity and 1 stop bit.

i don't need the high frequency for processing, but i need high baud rate to communicate with the nokia 3310, if i can do this with the PIC16f84A or other 16 series for example 16F877A(40 Pin)

i need to reach this baud rate(115200) to do my project.

i can't use the other PIC, because i need to complete my proj earliyer. and if i use the other pic, i need to learn about them, and i don't have enough time.

Please help, if u can. thanks in advanced.

[abbas.khodaeian]

Excuse me, i have some mistake about spelling your name, i'm so ashamed of this.

[aratti]

abbas.khodaeian, I am sorry but you cannot reach an acceptable boudrate of 115200 with 16F series even with a 20 Mhz oscillator.

If you want to use the 16F84a, then you must change the phone type and use a brand with boudrate @ 9600 (siemens for instance. make sure they work in text mode)

i don't need the high frequency for processing, but i need high baud rate to communicate with the nokia 3310

The high frequency clock and the pic 18F are necessary to reach the high boudrate required by your nokia 3310.

Al.

[mister_e]

mostly right, but no cigar. You can reach a really decent baudrate accuracy, if you pick the right crystal. 11.059MHz, 14.745MHz and other Baudrate Vouched speed (you know those we often forget ) would do the trick with a regular USART (not with built-in bit banging solution.. even though 8 MHZ would probably work fine with DEBUG)

No pain no gain, those crystal speed aren't "standard value", well not listed in PBP supported list, so you'll need to tweak you delay, if your application is timing sensitive.

[sahin5002]

Chakkarapani, you are not saying much about your hardware. I hope you have used a max3232 to connect the Fbus to the PC otherwise you have burned the Rx line. (Fbus is 3.3 Volts)

Alberto

Hi aratti , Can you please give me a schematic for connecting SIM300CZ (www.sim.com) and pic 16F877A. mainly the Tx Rx line