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TCP protocol is designed for reliability. It has several states (closed, open, listen). Several packets are sent in both ways in order to change the state. After a connection is established, for every data packet sent in one way, there is an acknowledge packet sent back. This is used to control the reliability of the transmission. If one side does not receive an acknowledge for a packet (packet was lost), it will retransmit it after a time. However, this has its costs, the traffic will be increased with the control data.
On the other side the UDP protocol is designed for speed. There are no connection states, and a packet is sent without expecting any kind of confirmation. The packet may or may not arrive at the destination, and the sender has no way to be aware of this. This is appropriate for data where you can afford some losses (ex. video streaming).
I want to work on GPRS based telemetery system where i can monitior the remote data on internet. From these above posts i have brief overview that how to send data using tcpip stack of gprs module to a specified port. But i dont know how to receive this data on internet using pc. If any one can add this to something then thanks for advance.
For PC side, you have to write an application using socket communications. Fortunately, a lot of languages provide a socket interface to send receive data via TCP /IP. And there are a lot of examples out there that do that.
One more questions. Actually I am intended to work on Automatic Meter Reading System. I know it is off the topic question but can you suggest me the most cost effective communication mode and model for this application.
My idea is to attach GPRS module with each Energy meter to get its reading on server but i have as i dissucsed it .. THis is not going to be costeffctive solution.
Do you have any ideas about this topic too..
GPRS is the thing being used these days. Power Line carriers have been used in the past. GPRS is preferrable since there is no cost of wiring. Yes the module is a little expensive ($30-40 in qty) but the prices are coming down.
Hi
I am having SIM305 modem.I am now working on project based on GPRS. I have to send some data to a server through this modem. I am new in this field. can any one please help me to have a start up?
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