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James Cohen replied to Ken Biba's discussion 'Truck Adaptation'

v1 of ardupilot is navigation only and should work with an RC car

July 2

James Cohen commented on Gary Mortimer's blog post 'Great UK source for Xbee tracking and Ardupilot.'

Great news for us Brits

June 30

James Cohen replied to James Cohen's discussion 'Binary format for serial output?'

It only sprang to mind when I read a comment somewhere here within the community (I can't find it for love nor money now) that they'd experienced better performance by disabling the serial output. From a quick look at the atmega datasheets I think…

June 11

Chris Anderson replied to James Cohen's discussion 'Binary format for serial output?'

It's not clear to me that you'd get any performance improvement. The serial TX is handled by the hardware (UART) and we're well below the Xbee transmission capacity. It's also just not that much data--approx 1/5h as much as is coming in on the Rx si…

June 11

James Cohen replied to James Cohen's discussion 'Binary format for serial output?'

I do

June 11

Chris Anderson replied to James Cohen's discussion 'Binary format for serial output?'

You mean data telemetry for the groundstation?

June 10

James Cohen added a discussion

Binary format for serial output?

I wondered if it might make sense to support both text (as it does now) and a "raw" TX method for the ArduPilot. With the "raw" mode you could save a few (possibly a lot as a %) bytes per transmission which could mean a faster rate of messages and l…

June 10

James Cohen commented on Thomas J Coyle III's blog post 'UAV support group for North Texas'

"UAV support group" sounds like somewhere that down and out UAVs go to get help ;) On a serious note it's good to see the community spirit.

June 10

James Cohen commented on Blaise Zerega's blog post 'Chris Anderson's DIY Drone at Maker Faire'

Great presentation

June 9

James Cohen replied to Andre Crawford's discussion 'Unmanned Vehicle'

Hi Andre, As far as I understand the Ardupilot v1 code should adapt well to this. James

June 8

Gary Mortimer replied to James Cohen's discussion 'Hacking a cheap bluetooth GPS unit?'

Be nice if you could just plug cameras/gps/something else into an onboard USB hub and go! Big ask.

June 6

James Cohen added a discussion

Hacking a cheap bluetooth GPS unit?

I wondered if anyone had tried hacking a cheap bluetooth GPS receiver? There's no lack of them on eBay and with a bit of tinkering it should be possible to disable the bluetooth portion (in case of 2.4GHz interference) and find some kind of serial b…

June 6

James Cohen commented on Tom's blog post 'Low cost ($60) 2.4 G Computer Transmitter with Dual Receiver antenna question...'

Hi Tom, $60 sounds like a steal, it'd be good to hear how it performs. Antennas work best when their length is matched to the frequency they're working on (transmitters tend to be more sensitive . Doing some quick calculations for 2.4GHz shows tha…

June 6

James Cohen commented on bGatti's blog post 'new altimeter'

Am I right in saying 10hPa is ~200 feet?

June 3

James Cohen commented on Jordi Muñoz's blog post 'Wiring up uBlox! (Only for PRO's)'

Michael - from Sparkfun http://www.sparkfun.com/commerce/product_info.php?products_id=8889

May 28

James Cohen commented on Jordi Muñoz's blog post 'Unofficial ArduPilot 2.2 Release'

Looks great Jordi. I can see the code for reading waypoint data from the EEPROM. Is there any code for writing the waypoint data into the EEPROM?

May 26