"Yes and I forgot to mention... my serial monitor first shows some random data when the apm is booting, then because after that it the GPS process and then it says ready to fly but my green LED does not glow. "
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agmatthews
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- Melbourne, Victoria
- Australia
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agmatthews's Discussions
Testing a SRF02 Sonar - partial FAIL
Started this discussion. Last reply by Thomas J Coyle III Nov 12, 2011. 1 Reply 0 Likes
An analysis of Sonar calibration issues
Started this discussion. Last reply by Randy Dec 11, 2011. 15 Replies 4 Likes
User Hooks
Started this discussion. Last reply by agmatthews Oct 21, 2011. 5 Replies 2 Likes
agmatthews's Page
Latest Activity
Hindole Dutta commented on agmatthews's blog post Creating an I2C sonar for Arducopter"And this is the eedump data...
http://dl.dropbox.com/u/16314442/eedump.rar"
Hindole Dutta commented on agmatthews's blog post Creating an I2C sonar for Arducopter"Maybe yuo can have a look in my code, I just changed included the libraries of the SRF08 sonar and made some adjustments in the AP_RangeFinder library and my code.
http://dl.dropbox.com/u/16314442/arducopter%20modified.rar
Thanks."
Hindole Dutta commented on agmatthews's blog post Creating an I2C sonar for Arducopter"I just put everything into a #if at the places where the code was checkin conditions and intilizing the values for an analog sensor.. could you be a bit more clear as to what parameters affrct the eeprom storage please... Ya i did define one…"
DeveloperR_Lefebvre commented on agmatthews's blog post Creating an I2C sonar for Arducopter
"Hindole, did you perhaps add any new parameters that get added to the EEPROM storage? If so, that might be your problem. It's very easy to break the storage system, and then it won't boot. Look in the serial monitor after…"
Hindole Dutta commented on agmatthews's blog post Creating an I2C sonar for Arducopter"Hi,
I read your post on interfacing arducopter with a I2C sonar module. I am trying to interface the srf08 sonar sensor with my APM board. I tried modifying the code and so far after debugging it, I don't get any compile…"
Chad P commented on agmatthews's blog post Infrared beacon guidance for the arducopter"Agmathews, any more news on this. I am really interested in it, I think it could mean a huge step for precision landing (landing on charging station), and tracking objects. I was just wondering if you got it worked out or put it on the…"
agmatthews replied to jasonshort's discussion Arducopter 2.1 release"Marco,
You can buy an i2c board for the MS5611 from here http://www.drotek.fr/shop/en/44-ms5611-pressure-barometric-board.html. Then you can write a library to interface the board and integrate it in to the arducopter code.
This is DIY after all"
agmatthews commented on IKE's blog post Telegraph.co.uk mistakes small drone for UFO!"To these guys it clearly is a flying object that they can not identify, in other words an Unidentified Flying Object = UFO.
Would not have taken much too identify it.
Bad lazy journalism"
DeveloperRandy replied to agmatthews's discussion An analysis of Sonar calibration issues
"Andrew,
Thanks again for the great analysis. I've changed the code in trunk to take all this into account and the accuracy seems much better. There's a new parameter called SONAR_TYPE which can be…"
agmatthews replied to jasonshort's discussion Arducopter 2.0.50"Do you have solid red GPS light on the IMU board?
if not then there is a problem between your GPS and the APM/IMU board
see http://code.google.com/p/arducopter/wiki/AC2_LEDs"
agmatthews replied to jasonshort's discussion Arducopter 2.0.50"Have a read of http://www.diydrones.com/forum/topics/user-hooks
It explais the user hooks concept
u4eake's code is a user code that needs you to define a user hook
"
agmatthews commented on Chris Anderson's blog post Unmanned heli lands on a moving trailer"And here it is in miniature - one for the little guys!
"
ModeratorThomas J Coyle III replied to agmatthews's discussion Testing a SRF02 Sonar - partial FAIL
"agmatthews,
Nice experiment and good analysis of the results. I have both of the sensors, but use them in a rover for obstacle avoidance.
Regards,
TCIII"
agmatthews posted a discussionTesting a SRF02 Sonar - partial FAIL
Hello All,After plenty of testing I have concluded that the SRF02 sonar is NOT A VIABLE REPLACEMENT for the Maxbotics MB1200 series of sonars for the downward looking (alt hold) sonar on Arducopters.…See More
I.S. replied to agmatthews's discussion An analysis of Sonar calibration issues"Great piece of info linked, as expected from a serious manufacturer.However, I'm not sure (I don't say I disagree) suggesting the MB1240 (EZ4) over the 1200 (EZ0),
since although the noise immunity is higher its lower sensitivity may avoid…"
Profile Information
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- Melbourne, Australia
Agmatthews's Blog
Fancy LED lighting option for your flying machine
Posted on September 30, 2011 at 5:30pm 4 Comments 4 Likes
Today I spotted this "Digital Addressable RGB LED with PWM waterproof flexi strip" from Adafruit.
Each LED in this strip is individually addressable, meaning you can set the…
Continue Infrared beacon guidance for the arducopter
Posted on September 26, 2011 at 5:00am 28 Comments 8 Likes
Optic flow and the Franken aeroplane doing aerobatics
Posted on September 15, 2011 at 4:51am 1 Comment 5 Likes
Australian scientists have developed a novel autopilot that guides aircraft through complex aerobatic manoeuvres by watching the horizon…
It's not unmanned but it is electric flight!
Posted on September 8, 2011 at 1:45am 4 Comments 3 Likes
On August 12, electrical/aerospace engineer and helicopter pilot Pascal Chretien took to the air in the world's first untethered, fully electric manned helicopter flight in a prototype machine that he designed and built almost entirely by himself within a 12 month development period. In his 2 minute, 10 second test flight, Chretien beat aviation giant Sikorsky…
Attack of the birds
Posted on August 6, 2011 at 1:46am 3 Comments 8 Likes
Comment Wall (2 comments)
- At 4:18pm on February 7, 2010,
Developerjasonshort said… - agmatthews,
I reworked the uBlox code. I found it wasn't as good as I thought when I received it. It had quite a few bugs. Does my latest version fix your overflow issue?
Jason
- At 3:04am on February 8, 2010, agmatthews said…
- Jason,
We've identified two problems that seem to still be in the 2.5 GPS code
1) the value read for 'UBX_payload_length_hi' can be corrupted during a serial transmission. if the value then read is > 40 then the GPS code will write into memory beyond the UBX_buffer[]
2) The code that sets GPS_fix if(UBX_buffer[4] >= 0x03) reads the wrong part of the Ublox data
The U-Blox Protocol Spec says:
Important: To qualify a position as valid the gpsFixOK flag in the UBX-NAV-STATUS message has to be checked. gpsFix=3D/3D in the UBX-NAV-STATUS message does not qualify a fix as valid and within the limits.
To truly test for GPS NAV fix we need to test for something like this:
if((UBX_buffer[4] >= 0x03)&&(UBX_buffer[5]&0x01))
regards
Andrew
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