Telemetry over cellular IP

Develop standard, re-usable inexpensive solutions for IP-enabled always-on UAVs over cellular IP networks such as GPRS, 3G, 4G etc.

Primary goal: Telemetry over low cost cellular [achieved in testing]

Secondary goal: Bi-directional GCS/Telemetry over cellular IP [achieved in testing]

Tertiary goal: High speed IP for streaming IP video over cellular 3G/4G

STATUS: Bi-directional telemetry over cellular IP (UDP or TCP) is now working. It has been flown successfully while logging live telemetry to a GCS at home, several miles away [distance is really unlimited]. Currently working on improving code, more testing and broader hardware support.

Members: 463
Latest Activity: 1 hour ago

Current (most common) Telemetry Architecture

Proposed Architecture:

Discussion Forum

Cellular Modem library development

Started by Andreas M. Antonopoulos. Last reply by Miguel Angel Perez Nov 13, 2014. 43 Replies

Using RN-XV wifly module for telemetry (iPhone / Android)

Started by Ryan Rasmussen. Last reply by Tommy Larsen Jan 7, 2013. 37 Replies

Hooking up Drone cell

Started by Jonathan McClanahan. Last reply by Richard Sterling Oct 22, 2014. 17 Replies

Adding GPRS Telemetry to Walkera X350 Pro

Started by Robert Haddad. Last reply by Robert Haddad Oct 4, 2014. 12 Replies

Add AT/Modem commands to Arducopter v2.9.1

Started by Bernt Christian Egeland. Last reply by Veikko Vierola Jul 30, 2013. 10 Replies

Serial to UDP or TCP

Started by Wilhelm Matilainen. Last reply by Bill Bonney Apr 3. 9 Replies

Telemetry over ethernet

Started by Dylan Eave. Last reply by Dylan Eave Jan 5. 9 Replies

Pixhawk+drone cell+4G

Started by Eyeindasky. Last reply by apm makeflyeasy May 13, 2014. 9 Replies

3G Video Stream

Started by Larry Schmidt. Last reply by Euan Ramsay Feb 17. 8 Replies

iComSat v1.1

Started by Jeffrey Nichols. Last reply by Veikko Vierola Oct 15, 2012. 7 Replies

Comment Wall


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Comment by Silvio on April 12, 2015 at 3:18am

UPDATE: I've also managed to connect the GCS with 4G. So I have 4G (Aircraft) to 4G (GCS). I'll post a video shortly on

Comment by Silvio on April 12, 2015 at 3:16am

Hi Nick, thanks and sorry for late answering, I regulary check for new posts on However I don't know about interference, but everything seems ok (and very fast)!

Comment by Nick McCarthy on March 23, 2015 at 8:22am

Silvio: That's a cool project! I have an application where I may be testing your setup soon. Do you know what frequency range the 4G modem is on, and how it affects range of other RF components on-board?

Comment by Silvio on March 23, 2015 at 7:43am

Many thanks Cxgiacomo, I'm sharing a lot of knowledge for free about 4Gmetry (on - it's completely open source. If you have any suggestion or improvement please post on any forum! Thanks again, S.

Comment by cxgiacomo on March 22, 2015 at 9:11am

Thanks Silvio, I have a feeling that 3G/4G telemetry is going to explode in the commercial market in the next 2-3 years... that site is a great place to sell new companies on the potential useage.

Comment by Silvio on March 22, 2015 at 9:01am

I've written a short tutorial for dummies about 4G telemetry ( and related best practices. I hope this can help. Bi-directional telemetry (UDP or TCP) is perfectly working. Your vehicle can now go several miles away [distance is really unlimited].

Comment by michael malarkey on March 5, 2015 at 7:54am

I have been observing here for a while, several posts about the use of "AT+W" to store your current configuration, this command does not effect parameters that may be of use to this forum.  In addition the "AT+CIPSCONT" command will move the current network centric parameters such as the results of a "AT+CIPMUX" command from ram to navram, this can preserve many of the network critical parameters for a complete list, the applicable command reference manual or issuance of "AT+CIPCONT?<cr>" (may be "AT+CIPSCONT=?<cr>" or the ever popular "AT+CIPSCONT <cr>") to query the results.  One anomaly I have noted on a factory fresh SIM900D is that if you use this approach (AT+CIPSCONT) after you set "AT+CSTT" correctly the module connects automatically at start up, but does so incorrectly locking the device off the network, I have not been able to recover from this state, so I intentionally set an incorrect value for "AT+CSTT", utilize "AT+CIPSCONT" and then set "AT+CSTT" manually on each boot up, this minimizes the total number of commands after boot up to 2.  AT+CSTT & AT+CIPSTART.  I would be happy to hear of a resolution, but wanted to pass along an 8 hour lesson along with my new found knowledge of "AT+CIPSCONT"!

Comment by on February 14, 2015 at 11:07am

Hello guys,

Now that I received a HUGE help from someone here from this group, I am able to hook a sim900 to my PC, send AT commands, connect to UDP server, etc...

Next step is to have the sim900 to run those AT commands by itself when starting up.

Is there any tutorial anywhere about how I could insert those commands in the APM startup file ? I am a PHP programmer, but I have never compiled anything, so a list of APM compiling tools would be definitely great !

Thank you 

Comment by on February 3, 2015 at 6:53am

Hey guys,

That is a 2 year old thread now, but still really interesting.

Would any of you know of any "how-to" procedure for dummies or any dummies to make those SIM900 and MP talk to each other please ?

Thank you

Comment by Alex Cormier on November 11, 2014 at 7:38am

Richard, here's how i did it:

On the left, you see the pin layout for the Raspberry Pi. in the middle, a level shifter and on the right, a hand drawn diagram of the APM telemetry pin.

Hope this helps!



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