A Little help in getting started

farhanm · Joined: 22 Oct 2006 Posts: 1

hi,
I have been searching around on this forum and found it really interesting. Though i found some hep on how to go about my project , I would really appreciate if u guys could porbably guide be in the right direction.

What i need/plan to do

First Part

Data= information from a sensor, and is not more than 2kb

Data comes in and is supplied to PIC18F452 through serial port

PIC18452 then supplies this data to a GSM modem connected to it through another Serial port.

GSM Modem (Enfora SA-GL 1812) connects to the internet using GPRS and uploads the data to a web server (FTP).

This proceedure has to be follwoed every 15 secs.

Second Part: (heres where i am a bit puzzled)

some other Data from central webserver has to be sent back to the PIC18f452 so that it can manipulate it.

My analysis

I have worked with PIC18F452 and done little projects on it, but do not have any experience of serial communication. I have read about alot of stuff here and currently working on my skills on communicating with PIC18F452 and GSM modem thourgh serial.

Here are a few queries that i have.

Q1. Can we use the GPRS to upload the data as i have expalined above? if so help regarding this will be greatly appreciated.

Q2. what will be the best way to recieve the data back from the central server.

Hoping for a quick reply.

Guest · Posted: Tue Jun 19, 2007 10:33 am

arunb · Joined: 08 Sep 2003 Posts: 492 Location: India

Hi,

You need to interface to a LAN network for this, you could use the ENC28J60 for this purpose, but you would also need a TCP/IP stack to send and receive ethernet packets, and also for supporting protocls such as FTP, UDP TCP etc.

Fortunately microchip has a free to download TCP/IP stack, apart from this you would need to make the hardware, for more help you could see Microchip's Discussion forum on ethernet

thanks
arunb