Replies to This Discussion

DeveloperPermalink Reply by Andreas M. Antonopoulos on May 1, 2012 at 11:36pm

The 3G cellular data shield is compatible with AT-command set and therefore may work with the new experimental Cellular Modem library. The key commands for setting up TCP and UDP are the same. 

 Let me know if you would like to test it for telemetry.

As for video, that will be a follow on goal, but it is too early yet.

Permalink Reply by Devin Johnson-Kinlaw on May 12, 2012 at 7:37pm

DroneCell has arrived in SATX, so I'm ready for testing.

 

Permalink Reply by Veikko Vierola on May 13, 2012 at 1:23am

I'm also ready for testing. Where to get Antonopoulos's latest DroneCell test code.

Permalink Reply by Murray Spoelstra on May 20, 2012 at 1:06pm

Andreas, thanks for the patch I would like to try it out with my Arduino Sim900 GSM shield. Unfortunately I'm a bit new with GIT and was wondering if you could point me to somewhere to find out how to convert your patch to code? Earlier the year I started experimenting with connecting an Arduino UNO with the GSM shield to the APM1 through a I2C connection. The setup was chosen to free the APM1 from delays while communicating with the GSM shield. I assume you connect the GSM shield directly to an APM1 serial port?

Permalink Reply by Anton Horpynich on October 10, 2012 at 1:43am

Andreas, have you tried to read/write many waypoints throught GPRS connection?

I used Siemens TC65 modem for GPRS connection and have good connection at 4800 baud rate slightly decreased some of the data rates in Mission Planner. If I choose higher rate the modem may hang up in several minutes.

But when I try to write or read waypoints using GPRS I usually get an time out error or sometimes other errors. Also reading WP is more faulty than writing. Does anybody faced the same problem?

Permalink Reply by Søren Kuula on November 8, 2012 at 11:43am

Hi, yes reading and writing WPs in Mission Planner seems very very sensitive. I have to try several times over before each time it works, even if the link quality meter thing reads 100%. An XBee link has to be quite good too. The USB cable always works.

Regards

Soren

Permalink Reply by Søren Kuula on October 26, 2012 at 1:34pm

Hi,

It sounds great with a library!

I was also developing one. Maybe you can help me decide whether I should continue that work, if you can tell me:

•  Does you code initialize the modem (SIM900) up to having a connection automatically?

•  Does it end up in a deadlock state ever? Among other cases if:

1. Initializing the modem and then cycling APM power off and back on
2. Initializing the APM and then cycling modem power off and back on
3. Getting out of and back into mobile coverage

• Does it support SMS commands? I thought of some like "SMS me your position", "Goto WP #n", "Come home" etc. in case GPRS but not GSM is lost

To me, the most important is prevention of deadlocks.

Regards

Soren

Permalink Reply by Søren Kuula on November 8, 2012 at 11:52am

Hi all,

I have some code ready for testing.

It works with the SIM900(D) GSM unit (which is on the DroneCell) and currently probably only with that. It does not use transparent mode, but rather implements a state machine that get the modem through all init until UDP "connection".

It makes use of an extra pair of ring buffers, and implements a new interface that FastSerial also implements. That means, in ArduPlane.pde and system.pde, one just has to define an instance of my class using a serial port, and in GCS_MAVLink.pde have channel 1 to use that instance instead of the FastSerial instance. So a sort of stream filter.

Configuration (access point name, host name and port etc.) is currently hardwired but something settable will come later.

I a not sure how to proceed with making this available.. anyway if anyone is interested in testing it, pse contact me.

Regards

Soren

Permalink Reply by Jerry on December 12, 2012 at 12:48pm

I'm interested in testing it! I found your google code page. I tried to use it with ardupilot 2.68, but after a closer look, looks like you are using an earlier version. 

Please PM me. I would love to talk to you more about this.

Permalink Reply by Nicholas Pilkington on May 5, 2013 at 10:15pm

This has been dead for a while. Does anyone know where I can find the latest version of the library. I just got a DroneCell and Arduino Cellular Shield so I'd like to test them with APM 2 for telemetry data. 

Nick

• ‹ Previous
• 1
• 2
• 3
• Next ›
• Page