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Sms using GSM Modem & PIC16F84A

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Akira Sakura

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gsm modem pic16f84a

Hello to all of you!

I'm doing a project about sms using GSM Modem. but, i got confuse with connection between PIC16F84A and Max232.

can i connect the output from the PIC16F84 at RB7 to Max232 at R1OUT (pin12) only?
bcoz i only want to send the sms from PIC to gsm modem.

please help me...
 

pic16f84a gsm

The PIC16F84A doesn't have a UART, so I assume you are going to bit-bang the data. The R1OUT pin on the MAX232 is the logic-level outout that you'd connect to the uP (you could use just about any pin you want, because as I said that uP has no UART). R1IN is the correspondinig pin that connect to the RS232 side.

If your intent is to send SMS to GSM, you need to connect both transmit & receive data. You'll need to send commands & data to the modem and receive data from it.
 

r1out pin

how do i connect the transmit & receive?
is it from the PIC or to the RS232?

let the output from PIC is at pin 13 (port B7), then i connect it to MAX232 at R1OUT. i hv attach a picture for the connection. is this connection right?

0_1240288634.jpg
 

connect gsm modem pic16f84

Yes, if the MODEM is a DCE device (most likely) - that is if it's intended to plug into a PC.
 
pic16f84 gsm

ok.
thanks...
now i have problem with sms part.
my modem functioning right with AT command in text mode. how do i convert the AT command in assembly?
i'm not good in assembly language nor c language.
can u help guiding me?

how can i assign the port for sms part? i only know how to assign for input&output port. but then, how i assign for baud rate& etc?
 

use pic16f84a to send sms

I'm doing a project about sms using GSM Modem. but, i got confuse with connection between 8051 and Max232.

can i connect the output from the 8051 to Max232 at R1OUT
bcoz i only want to send the sms from 8051 to gsm modem
 
pic16f84a connection

manjappa.. i'm so sorry coz i can't help u. i never use 8051. i only know certain microC...
 

vaishali chaudhari said:
how to test GSM module, can u guide me
Click to expand...
just connect the gsm modem to ur pc. insert the sim card...
use hyper terminal in ur pc...
just go to
start -> all program -> accessories -> communication -> hyper terminal.

set the setting...
 

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