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Comment by MrLudvig on February 9, 2013 at 11:12am

Hi

Im manually run these AT commands:

AT+CGATT?   //attached to GPRS ?
AT+IPR=57600
AT+IFC=2,2   //"it's better to use hardware flow control"
AT+CIPMODE=1  //Enable transparent mode
AT+CSTT="internet.public"  //set APN
AT+CIICR   //open GPRS
AT+CIFSR      // Get local IP address
AT+CIPSERVER=1,1234//Start the TCP server, listening port:1234

 

Be sure your APN is correct. i had to use internet.public for my purpose.

I also get external IP from my cell vendor wich meens im not behind any firewall  :)

After i write all AT commands i swop the TX RX connections from my computer to the APM2.5 UART0 ( See pic bellow in Red section)

I then start my MP and choose TCP. 

 

My GCS is my computer with regular broadband internet and Mission Planner.

 

Im trying to write the Adrucopter software for auto startup and hopefully im able to set the parameters( IP, Serial, Port) from my Mission Planner without changing my code.

 

Im using :

APM 2.5 with orginal 2.9.1 software.

SIM900

Mission Planner

 

Ludvig

 

 

Comment by Veikko Vierola on February 9, 2013 at 10:36am

What kind of commands and parameters did you use to get the tcp working and what kind of internet connection do you have in your groun control station side?

Comment by MrLudvig on February 9, 2013 at 6:05am

Hi

Finally i got this working with TCP protocoll. ;) ;)

The latency is under 500ms, ;) im impressed how great this work.

I will try UDP later and compare the transfer speed.

My next step will be to implement the AT commands into the Arducopter 2.9.1 software for auto configuration of sim900 modul.

Any suggestions for how and where to put the code?

Ludvig

Comment by MrLudvig on February 5, 2013 at 12:20am

Hi Gents..

Im newbie in this section so please be gentle to me...  ;)

Have been testing the SIM900 for a while with AT commands on Adruino Mega board and works perfect.

So i decided to test this SIM900 on my Arducopter.

I have an APM 2,5 and SIM 900. I have connected SIM900 TX RX to the UART0 pins. (see picture RED )

 

I downloaded andreas-apm2-wip code and installed to the board.

 

From this point i need some help. ;)

Can someone please clearify some questions for me.

- The andreas-apm2-wip code is based on 2.6 version. If i want to use latest software e.g 2,9 , how to accomplish that?

- If i want to use home internet and not USB dongle GSM for my mission planner, how to set up the mission planner? I can only set COM port and speed???

- I cant find any place in the code to change the MDM parameters.? where?

MDM_IP1 192.000000  - First byte of IP address
MDM_IP2 168.000000 - Second byte of IP address
MDM_IP3 0.000000
MDM_IP4 161.000000 - Fourth byte...

 

Thx in advice.

 

Ludvig

 

Comment by ockhams barber on February 4, 2013 at 10:56pm

Hi Toby,

Yes I agree support has gone to the dogs since they moved it off-shore. Ah well that's modern business. %$##@#E it.

Comment by Toby Mills on February 4, 2013 at 12:37pm

Sounds like TPG will be no good for you then. I bet they do have a public APN, just a case of finding someone who can give you the info.

Comment by ockhams barber on February 3, 2013 at 9:37pm

Hi Toby,

No the apn is simply TPG and according to the company that is the only apn they have.

Comment by Harrison Cassidy on February 3, 2013 at 10:53am

Definitely Rick,

The product I linked hasn't been out for very long from what I have heard and also documentation is scarce (as to be expected). 

Hopefully soon we might have some kind of easy, open-source solution. Perhaps an add-on for AP 3?

Comment by Rick Eis on February 3, 2013 at 10:50am

Harrison,

Well, the various rules and laws I think are a topic for another thread.

I just would like to see a step by step plan on doing something that someone did that was a success. Then others like myself can start experimenting. :)

Right now I don't even know what can be done realistically or how to do it, much less what rule or law I'm breaking .... make sense?   

Rick

Comment by Harrison Cassidy on February 3, 2013 at 10:39am

Yeah, thats what I am thinking Rick.

The only problem with this is that it is all well and good having the ability to fly from anywhere in the world while you plane is anywhere else but because of restrictions on UAV flight and how far away you can go from the operator then you cant take advantage of this.

I know the UK UAV rules are that you cant fly out of LOS without a 'sense-and-avoid' system which there really isn't a good system for that yet that is cheap!

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