Connecting CR1000 Datalogger to Remote PC Wirelessly

Take a look in the next picture:

Let me make some questions:

1) How far is PC from CR1000?

2) Where are you? It is important to know where are you in order to offer you a better solution due to GSM modems in America do not work in Europe, just a sample.

3) Do you need in-time data? I mean, constantly know what is going on wit your measurements, or Do you need something like ones a day data analysis?

More info we have more precise can be our answer.

Thanks for reply.

1.My PC may be any where may be in different city, as i want data through internet.

2. Presently in India. I will use GPRS modem which can work anywhere, i think so using SIM

3. The datalogger CR1000 can be programmed for taking data to any frequency. I have a software which collect data from CR1000. Just need to connect it through internet through GPRS modem

1. Do you want data through internet or through GSM/GPRS?

2. I have a point here that depend on answers to question 1 and question 3.

3. When I asked about real-time information/data I mean: GSM/GPRS call cost$$$$. To get real-time information/data means to make a call every... let say 3 seconds. 20 per minute. I do not know the mobile GSM connection cost in India but here will be something like 4 USD per 20 connections. Anyway, I think you already planned that before than I say it.

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Let me show you what else I will do in your case

at first u need to design the requirements....

there are many gprs modules are available in the market ranges from inr 1000. for starting the communication through gprs, u need to find out a gsm service provider to access the gprs through gsm

huawei provides the cheepedt GSM module which can be communicated to PIC using the serial communication port(USART)

you need a TCP/IP stack in your micro, or use a GPRS modem with TCP/IP embedded (like Telit).

You can also use CSD to establish a point to point connection like a standar modem. The connection cost is for time instead of traffic.

http://www.alibaba.com/showroom/modem-csd.html

http://en.wikipedia.org/wiki/Circuit_Switched_Data

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I did similar thing, but I used GSM/GPRS modems (not phones, no big diference) with TCP/IP stack in it and you need SIM cards with fixed IP addresses.

After that you can configure server-client mode of operation of those two modems via GPRS. Everything that came in into one modem (serial data) gets out in another one and vice versa.

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hmmm maybe not so clear, let me see what i can do:

* You need to get a GSM modem with built in TCP/IP stack. If you will use anything else, it will be to much to deal with.
2. Modem starts. You set the GPRS and you get an IP address form the network.
3. You send by SMS the IP address to the other phone, and connect to the GPRS.
4. The other phone connects to you via GPRS and you get his IP address. Now both system can talk to each other.
5. If you don't get connected, then the other phone or you re-send the IP address.

**If you don't have SIM with fixed IP, you can do everything if you have some sort of inteligence (mcu, PLC or so...).

After power on, mcu or other equipment can ask modem which IP he have, and after that mcu can send SMS to mobile phone (which is always same) on other side (with IP information).

After second side gets IP of first side, its program this IP as target one, and everything is like you have fixed IP (but you need to do a lot of programing).

***Or use a CDS in case of:

1. The Problem is sim card with fixed IP address.
2. Not all GSM operators support Fixed IP address.

3. The mobile operator don't support a fixed IP address.

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I do not know what else I can do for you!!

God bless you!!

Thanks a lot.

I want to use same method which you adopted i.e. will use GSM/GPRS modem ( having SIM with static IP address).

On the receiver end may i use PC having my software which can collect data from my data logger through internet. Do i need another modem at receiving end.

I will first try to get SIM with fixed IP address. I will also be looking for other option as told

Regards