sir my project is to automatically send an sms through gsm modem to the doctors mobile using a microcontroller whenever the threshold limits of blood pressure,temperature,heart beat etc are crossed so please suggest which microcntroller to be used and the mobile to be used and the necessary circiut with source code
Hi,
Microcotroller: You can use any microcontroller to do your work. e.g. 8051 family, AVR, PIC etc.
Circuit: Do you know the serial interfacing ckt? MAX232, DB9 connector etc. use that one & connect your modem to UART of microcontroller.
Source code: Serial communication source code depends on which microcontroller you are using. For GSM modem use the AT command guide so that you can send SMS. "">www.coster.info/.../gsm822w.pdf" this is wavecom modem guide.
we are using 89s52 microcontroller and rs232 communication .we want the name of the modem and also mobile name to which the message to be sent we want circuit for this....plz help me out
"we want the name of the modem and also mobile name"
Why to you want mobile name? for demo take your cell & Use your mobile number to send message.
Do following Connections:
P3.0 (RXD)connect this pin to pin no 9 of MAX232 IC P3.1 (TXD)connect this pin to pin no 10 of MAX232 IC
pin no 8 of MAX232 IC to pin no 2 of DB9 connector pin no 7 of MAX232 IC to pin no 3 of DB9 coneector
is db9 connector present in gsm modem????
the link which u gave is not working.......
Yes.
ok sir i understood db9 connector but should we insert any capacitors or necessary elements between microcontroller 89S52 and rs232 pls provide me the circuit related to this and the link which u sent is not working.can u suggest other link if any.
Ok fine.
Then put "AT commands guide" in google search you will get manual from there.
I don't have circuit diagram. For MAX232 you will have to connect some capacitors. Details given in the datasheet.
Other than that you don't need any capacitor or any other element.
SIR CAN U GIVE UR EMAIL ID?????
why?
IF I HAVE ANY DOUBTS I CAN BE IN CONTACT WITH U
AGAIN ONE DOUBT SIR CAN U PLS GIVE THE ORDER OF THESE ELEMENTS.IS IT MICROCONTROLLER TO RS232 TO GSM MODEM
This is public forum. I can't give. make one email id, give me. I will contact you on that. Ok
"connect your modem to UART of microcontroller"
HOW CAN WE CONNECT MODEM TO UART of microcontroller will there be any connections between modem and uart of mc,i mean do gsm modem have any port
Microcontroller -> Max232 -> GSM modem