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Michael Zietlow commented on John Gantner's blog post 'Google Earth Live FPV & Cellular Telemetry'
The concept sounds great. I have many recorded UAV flights that I would love to see from google earths perspective as though I was flying again. To do it real time via cellular uplink would be even better.
Sep 15, 2009
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John Gantner commented on Maik's blog post 'Using the G1 as GPS provider & telemetry for logging or transmitting to ground station'
Good luck with your project. Phones can certainly handle it, but the problem lies with the providers - many block anything other than HTTP (especially WAP APNs). I'm uncertain whether this limitation exists on the "Internet" APNs that…
Jul 9, 2009
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John Gantner commented on Maik's blog post 'Using the G1 as GPS provider & telemetry for logging or transmitting to ground station'
I'll be watching your efforts intently - I am very interested in hooking stock cellphones up to MCU boards. I use bluetooth to connect between the phone and the board, then GPRS to connect to the remote server. One obstacle I ran into was that…
Jul 8, 2009
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Ground Station UI Designs

I've been occupying my time by writing some ground station software. I felt there was a need for a cross-platform solution, as not everyone can run the Labview GCS. I liked this but I decided to DIY it as a learning exercise. Like that program I am also integrating with Google Earth. The Java Swing compact design Some C GTK widgetsQuestions:I am developing this for personal use, but would anyone else…See More
Discussion posted by John Gantner Jul 2, 2009
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John Gantner commented on John Gantner's blog post 'Bluetooth + GPRS Cellular Telemetry, Part II'
I wish. I bought a c168i off ebay but I found it didn't support AT command GPRS data over serial, and SMS is too expensive, too small, and too slow. In any case, I wanted to develop a relatively phone-agnostic solution so this was the only way.…
Jun 23, 2009
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Chris Anderson commented on John Gantner's blog post 'Bluetooth + GPRS Cellular Telemetry, Part II'
Any chance of a hard-wired serial link from the autopilot the cellphone? One generally tries to avoid adding more RF sources than necessary onboard.
Jun 23, 2009
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John Gantner commented on John Gantner's blog post 'Bluetooth + GPRS Cellular Telemetry, Part II'
The cellular link will eventually be able to issue commands but for now it is just telemetry. I'd appreciate suggestions on a command set for the base station. See my previous blog post for more details on the Google Earth live FPV simulator I…
Jun 23, 2009
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Chris Anderson commented on John Gantner's blog post 'Bluetooth + GPRS Cellular Telemetry, Part II'
What kind of UAV applications can you envision for this?
Jun 23, 2009
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Bluetooth + GPRS Cellular Telemetry, Part II

The emulator running some demo data, and showing the result.The Bluetooth/GPRS application I've been working on is now functional enough that it might be of use to someone. Feedback and suggestions are appreciated. Currently, the application has been left as a dumb bent pipe, so the mcu has complete control over the data stream (though it must conform to the var1=xxx&var2=yyy......\n format for parsing to work, see code and documentation).…See More
Blog post by John Gantner Jun 23, 2009
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Google Earth Live FPV & Cellular Telemetry

This post is about a live (simulated) FPV system using Google Earth, relaying data over a cellular GPRS/3G network. A while ago I saw a commercial OSD setup that used Google Earth to simulate an FPV display. Needless to say, I was immediately smitten. However, video TX gear is expensive and a hassle, so Google Earth here serves as a simulated FPV. Hopefully this will eventually mature into a Google Earth HUD (like the Flight Sim easter egg already in it, but real-life!)…See More
Blog post by John Gantner Jun 11, 2009
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John Gantner replied to Bill's discussion 'Anyone want to combine forces in San Diego?'
I think they use a separate channel for the prop pitch. They call it "4D Flying" - it combines helicopter-like hovering and fixed-wing speed. The videos are pretty unreal - they can fly an inverted vertical climb! Take that, hummingbirds.…
Jun 9, 2009
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John Gantner replied to Bill's discussion 'Anyone want to combine forces in San Diego?'
I'm not an aerospace engineer, but didn't the SR-71 intakes increase compression because they reflected the supersonic shockwave? I used to use a consumer GPS handheld on some of my projects and the user manual said if either of the two…
Jun 9, 2009
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John Gantner replied to Bill's discussion 'Anyone want to combine forces in San Diego?'
Good point on HELIOS - I didn't know it went so high (but of course, $$$). I remember that one disintegrating in midair too though... It's true that there is less air resistance up there, but there is also less thrust available for the…
Jun 8, 2009
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John Gantner replied to Bill's discussion 'Anyone want to combine forces in San Diego?'
Sounds like a neat project, though I think your goals may be set a tad high unless your budget has 7 digits. I'd love to collaborate on UAV stuff, I'm in the general area. I'm just starting with UAVs but I have robotics experience. I…
Jun 7, 2009
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Bluetooth and 2.4GHz RC Systems

Does anyone know if Bluetooth would interfere with the standard Spektrum-type 2.4GHz systems? I'm writing a JSR-82 app for telemetry transmission, since no phones with GPRS have serial ports anymore. I am worried about interference, however. If necessary, how could I shield the RX or phone without affecting range?
Discussion posted by John Gantner Jun 4, 2009
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New OEM Cellular modules on Ebay - $10! (#170335219418)

I'm a lurker but thought I'd share what I found today - hopefully it helps some people build better UAV's. I'm using cellular data too, but I am going the SSoftware2Mobile route. You can probably tell I kinda want to buy them anyways...Someone on Ebay is selling 10 new Nokia GSM modules - the kind you can get direct AT and GPRS access to easily. For $10 each buy-it-now! Obviously they don't know what they have since it seems the store normally sells household items. They're 850/1900 which I…See More
Discussion posted by John Gantner May 30, 2009

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John Gantner

Bluetooth + GPRS Cellular Telemetry, Part II

Posted on June 22, 2009 at 7:14pm 4 Comments

The emulator running some demo data, and showing the result.

The Bluetooth/GPRS application I've been working on is now functional enough that it might be of use to someone. Feedback and suggestions are appreciated. Currently, the application has been left as a dumb bent pipe, so the mcu has complete control over the data stream (though it must conform to the var1=xxx&var2=yyy......\n format for parsing to work, see code and… Continue
John Gantner

Google Earth Live FPV & Cellular Telemetry

Posted on June 10, 2009 at 11:20pm 1 Comment

This post is about a live (simulated) FPV system using Google Earth, relaying data over a cellular GPRS/3G network. A while ago I saw a commercial OSD setup that used Google Earth to simulate an FPV display. Needless to say, I was immediately smitten. However, video TX gear is expensive and a hassle, so Google Earth here serves as a simulated FPV. Hopefully this will eventually mature into a Google Earth HUD (like the Flight Sim easter egg already in it, but real-life!)… Continue

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