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[on:]

Hello.I know how to make calls and send SMS using a GSM/GPRS(SIM900) shield for Arduino.But I have a web service at the location http://mydomain.com/rest/receiveSensorData, and I want to send sensor data (or receive) to this URL using a GSM/GPRS shield.How to do this?Code?Ideas?Thanks.

[Reply #1 on:]

I want control a led on/off from my site and read temperature sensor from arduino.I want to make this with SIM900 via gprs.What code i need?AT + HTTPACTION?Http operation with get and post?Thanks.

[Reply #2 on:]

Hello Antkan,

I'm on a similar project. And I've found this example:

http://www.seeedstudio.com/wiki/index.php?title=GPRS_Shield_v0.9b#Resources

I have tested it and it works. I can send data to my server.

However my next step is to keep this connection active and send/receive data at anytime.

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[Reply #3 on:]

Ok.Good example.If i want control a led on/off what code needed?Must read the state of button on site every second?AT + HTTPACTION must be used?

[Reply #4 on:]

It depends of your server.

In my exemple I have hosted a simple TCP server listening on port 9000 so I use:

 mySerial.println("AT+CIPSTART=\"tcp\",\"my-personal-server.com\",\"9000\"");//start up the connection
 
 mySerial.println("AT+CIPSEND");//begin send data to remote server

 mySerial.println("my_DATA_I_want_to_send");

 mySerial.println((char)26);//sending

 mySerial.println("AT+CIPCLOSE");//close the connection

[Reply #5 on:]

Ok.Nice.If you want to receive data?What code neeeded?Thanks.

[Reply #6 on:]

I successfully read data for the first time yesterday :-) !

// into the setup function
mySerial.println("AT+CIPSTART=\"tcp\",\"my-personal-server.com\",\"9000\"");//start up the connection


// into the loop function
c=mySerial.read(); //

serial.println(c);

[Reply #7 on:]

Ok.I find this http://projects.sindrelindstad.com/how-to-led-arduino-php-proc/ .How convert his code for connect arduino with gprs shield?

[Reply #8 on:]

Yes, you can use Processing to interface your project !

Here my first test with websocket: http://lulzepp.tumblr.com/

I control 2 servor with a websocket interface. At the moment I use ethenet connection but my goal is to use GPRS !

[Reply #9 on:]

You should use our library for SIM900 http://code.google.com/p/gsm-shield-arduino/
This library include GPRS functions

[Reply #10 on:]

I am getting an error after the AT+CIPSEND command.

any ideas why?

[Reply #11 on:]

Are you using the last version?