Comment

Comment by Gundeep on July 4, 2012 at 9:33pm

hey Andreas, great work!

I also have a SIM900 Shield and want to try 3G Telemetry with it. I have followed the instructions given here, 

http://diydrones.com/group/telemetry-over-cellular-ip/page/testing-...

but couldn't figure out step 6, where can I find the parameters?

Regards

Developer Comment by Andreas M. Antonopoulos on June 27, 2012 at 9:35pm

@Toby, great to see you are getting good results. Certainly it is easier if you fly a linux-based computer. It would be great if you could write up some documentation and some photos so that others can replicate your effort!

Comment by Toby Mills on June 27, 2012 at 9:14pm

I flew a 7km flight today with 3G telemetry using one of these..

http://www.amplified.com.au/HSUPA_Router_Ethernet.aspx

It plugs straight into the APM and it also supports Dynamic DNS so you can connect to it from the ground without needing to know the IP address of your drone.

It also has two ethernet ports and I have tested a pan tilt zoom ethernet camera over the link and it works fine (it muxes setial and video over the same link).

It has a HSUPA modem which supports 7.2Mbps down and 2Mbps uplink.

Its got an ARM CPU and runs linux, configured via an easy to use web interface.

This is the way to go, no code and not mess.

Developer Comment by Andreas M. Antonopoulos on June 21, 2012 at 12:13pm

New modem library is ready for testing!

See the discussion thread

Comment by Murray Spoelstra on May 31, 2012 at 1:36am

Ellis, your system sounds impressive at only 200g! Do you plan on releasing an open source based systm in July?

An interesting solution to the lack of cellular bandwith is broadband bonding where they combine the signals from a number of cellular modems. Still a bit heavy though at 1.3 lbs.

https://www.mushroomnetworks.com/products.aspx?product_id=1017

Comment by Tommy Larsen on May 30, 2012 at 10:33pm

That thought cossed my mind as well :)

Comment by Geir R on May 30, 2012 at 9:28am

Isn't the 4G coverage over the Atlantic a bit weak? :)

Comment by Ellis Akins on May 29, 2012 at 6:24pm

Turbine

Comment by Cameron on May 29, 2012 at 6:04pm

 Ellis, what is the machine powered by? Trans-Atlantic flight sounds rather industrial. 

Comment by Ellis Akins on May 29, 2012 at 5:39pm

4G modem tests have proved very successful. Exceeded all my expectations with just under 500ms lag.

The problem with Skype, Teamviewer, and com0com (besides the considerable lag), is that the telemetry data and video feed are not synchronized. Teamviewer itself is too laggy to do any more than double-click, let alone view video.

My system consists of a powerful, light, compact onboard computer and 4G modem. The bandwith and latency is more than capable of streaming full HD video and transmitting telemetry both ways.

Currently my system consumes less than 10W total and weighs less than 200g. Together with Cameron Lattz, we have developed a ground control station, along with a 3G/4G communication program that streams HD video from a GoPro and 2-way telemetry over the internet. Also a Digi M10 satellite modem is used for redundant back-up telemetry communication via the onboard computer.

 

The custom programming allows both the APM and the onboard computer to restart each other in case of a freeze, with a redundant multiplexer to control both of those in case they both freeze. The onboard computer is set-up to restart automatically and resume video stream and telemetry communications. There is not much more to do to make this more redundant.

Plans are underway to carry out a trans-Atlantic flight this year. We are waiting on our COA from the FAA.

We plan to release our system and program in late July to the public.

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