GPRS with 8051

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caniget

Joined: 29 Dec 2007
Posts: 4

25 Jun 2009 6:58 mcs51 gprs

Hi friends,
I am in the urge to interface a GPRS Modem with 8051 Micro controller. I am having lot of doubts regarding this. Any one can please help me....
My doubts are
1) whether i can interface GPRS Modem with 8051 Controllers?
2) How to assign IP address to GPRS Modem and 8051?
any one can briefly explain about the Basic things about the GPRS and 8051 Interfacing.

hanif

Joined: 14 Feb 2007
Posts: 66
Helped: 5
Location: Pakistan

25 Jun 2009 8:51 power up interface for sim340e

Hi,

try this site, it contains schematic , source code , gsm/gprs at commands but for PIC.

http://www.olimex.com/dev/pic-gsm.html

regards

GSM Man

Joined: 15 Apr 2009
Posts: 354
Helped: 46
Location: New Jersey, USA

25 Jun 2009 11:59 8051 gprs

You can defineately interface a GSM MODEM to a uP - 8051, AVR , pIC, etc. It only requieres a uP with a serial interface. You don't need much processing power to do simple GPRS communications.

The IP address is assigned by netowrk when you connect to it.

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choto

Joined: 08 Jun 2009
Posts: 5

02 Jul 2009 5:54 8051 gprs schematic

hi

can anybody help me in interfcaing uP's serial port with sim340E. I have connected RXD,TXD nad GND signals to uP and powered up using power key but VDD_EXt doesnot give any output signal (it should be 2.93V) and no response for AT commands. Is anyother signal required for proper functionality?

GSM Man

Joined: 15 Apr 2009
Posts: 354
Helped: 46
Location: New Jersey, USA

02 Jul 2009 12:42 8051 gprs ip

If the "EXT_VDD" pin is not going high you are probably not holding the "PWR_KEY" pin low long enough. YOu should hold this pin low for at least 1-1/2 seconds.

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