Comments

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  Rodney Johnson April 14, 2015 at 4:22am

  Richard

  How many flights have you had with the M8N and have you noticed any interference in the GPS logs? With the higher sensitivity there is also a higher interference suppression with the M8N.

  I guess we will have to do some testing, it would be nice to have better RTH and overall positioning on a cloudy/ overcast day.

  If you get some time take a look at your logs and see if there is anything that looks like it will be a problem interference wise. It will be a few weeks before I get my test copter in the air.
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  Richard Kennedy April 14, 2015 at 4:06am

  @ Rodney Johnson

  I went through the same thing and have had great luck with the M8N. There has been a LOT of discussion about this and 3dr says it's not just the sat count but the trajectory information from the gps. Theory is it's far more sensitive [ that's why it see's more sats ] but that also make it prone to picking up interference. However I have one and seem to have no problem and other do as well. But I agree for $50 or so  it's really nice to see 10 sats in 1-2 minute! I've gotten 20 with a hdop of 1.1. Nice!
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  Rodney Johnson April 13, 2015 at 7:53pm

  Ublox Neo-M8N GPS with Compass.

  OK for what its worth, I have been waiting for 3DR to upgrade there GPS to the newer NeoM8N and it never happens. I have found that HOBBY KING has got it covered. I know,,, HOBBY KING right.

  Well I did a little bench testing today and this is what I found out. First off it is FAST,, no more did I power it up and it was giving me satellite information. The old 3DR Ublox 6 can't compare. Also this unit is plug and play and the best part is its only $48.00 USD plus shipping. But if it works its worth it.

  There is a review on this HK webpage at the bottom and also all the info. I plan on doing more testing before installing it on my hex camera ship but from what I have seen and read it will be good to go. I will be replacing all of my old 6's with 8's.,. Sorry 3DR, I know you have been working on the Solo but don't forget the PIXHAWK people.

  https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct...

     

  This is the 3DR ublox 6

   

  this is the HOBBYKING M8N

  
• Chris Holyfield April 9, 2015 at 4:59pm

  New here - question in regards to full autonomy and just overall in regards to CFIT. Responses are greatly appreciated to further my research!

  1.Do these types of drones in general use any type of DTM mapping since I noticed they use GPS? Or what type of mapping system are they using? Do drones react in real-time to avoid collision?

  3.Do modern DIY drones/companies have controlled flight into terrain issues?

  4.What are the biggest issues in regards to drones in regards to full autonomy?

  New here let me know, as I am still trying to understand. lol Any answer to any question is greatly appreciated! Thank you!
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  Artem April 2, 2015 at 6:35pm

  Question about current sensor resolution. I am building a high voltage 120A+ copter and looking for a suitable current sensor. I would like to try one of the hall effect sensors, but its resolution is 19mV per Amp. Is pixhawk sensitive enough for this? 
• Phil Horner April 1, 2015 at 11:57am

  Thanks Jim. Will do and I'll get back to you on the result.
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  Jim Powell April 1, 2015 at 7:44am

  Hi Phil; I just went through what you are witnessing. Here is a couple of places for you to check; In your Parms make sure that THR_MID is greater than 80. somewhere around 450 to 600 is ok you can fine tune later also check to see if THR_MAX Is around 800 or 900 or yo will have the exact problem that I encountered. See if this will help...
• Phil Horner March 31, 2015 at 11:28pm

  Thank you very much for your input. If you think it's safe to do so, I'll fit a fully charged battery tomorrow and try again.
• 100KM

  Hein du Plessis March 31, 2015 at 11:17pm

  Yes you have battery failsafe set at 15v and your battery dropped to 15 which enganged RTL / LAND. During land no throttle inputs are considered, I think. I would disable battery failsafe completely and make sure I watch the battery while flying.
• Phil Horner March 31, 2015 at 10:53pm

  Thank you for that. As I mentioned I throttled back to try and land but the graph shows it didn't happen as it should. So you think that the failsafe took over the throttle just as I lowered the throttle and kept itself flying while it was organising itself for a landing? Did you see anything else on the log to cause concern or do you think I really need to grow a pair (LOL) and fit a fully charged battery and do it again?