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Posts posted by Spitfire76

  1. 5 hours ago, erfan said:

    I need to fly at lower as possible ...?

    It is but I would not rely on the barometer that's in the flight controller. You need a more accurate range finder at low altitudes.


    I've used an ultrasonic one as it was the most economical 


    but if I were to add one these days I would try out one of these


    I'm currently building a fixed wing drone and a rangefinder is essential for antonymous landing so will likely use one of those although they are that cheap.

    • Like 1

  2. On 5/12/2019 at 12:37 PM, Spitfire76 said:

    It looks like the FENCE_RADIUS parameter range is 30 to 10000m so I suspect you will get an error if you try to set it lower

    I tried this on the ArduCopter SITL and although it does warn you that the value is out of range it does give you the option to continue and change it. So yes you can set it to 2 m but again the GPS is not so accurate so having such a low radius may cause problems.

  3. 25 minutes ago, erfan said:

    do you know what happns if I set the fence_Radius to 2 meters althought the min is 30 meters?

    It looks like the FENCE_RADIUS parameter range is 30 to 10000m so I suspect you will get an error if you try to set it lower. Typically the GPS is only accurate within a few meters, same with the altitude unless you are using a lidar range finder instead of the onboard barometer. I believe that GPS RTK is more accurate (down to a few cm) but I have no experience with its as it out of my budget.

  4. 52 minutes ago, erfan said:

    but I don’t know how did it happned when I changed from loiter to stabilize my copter flew higher than my expectation , I don’t know what did possibly go wrong ?!

    The throttle should be around 50% to hover when in stabilize mode. There is a "dead zone" in loiter mode which I believe is between 40 - 60 % throttle in which the drone will maintain altitude. Moving the throttle outside this range will increase or decrease the altitude. If you haven't moved the throttle back to the hover position of around 50% then when you change from loiter to stabilize it will use that new throttle setting and suddenly increase or decrease in altitude.

  5. 17 hours ago, seabirdman said:

    Here is a link to a pretty small packaged thermal camera that ought to be able to go into lots of smaller drones:  

    The range of that camera looks pretty small, I think its more suitable for short distance thermal measurements than longer distances that would be needed for use on a drone.  The thermal cameras used on drones seem to be in the several thousand dollar price range. A couple of camera companies that I've been following for potential use on my DIY drones are




  6. 18 hours ago, erfan said:

    I flow with my copter and got the log file , it was neither a bad fly nor a good one .below is the log analysis which I got from mission planer:

    What flight modes did you test ?. Was this the maiden flight ?. I typically test stabilize mode first as this only uses the gyro and accelerometer. If that works ok I switch to loiter which tests the GPS and compass. I also might test alt hold mode as this uses the barometer to maintain altitude. Finally if those work I'll test RTL. Its really important that some of the sensors are thoroughly calibrated before flying. Did it fly better in siome modes than others ?.


    18 hours ago, erfan said:

    Test: Compass = WARN - WARN: Large compass offset params (X:-310.85, Y:-47.46, Z:-105.86)

    Make sure that the only compass that is being used is the external one in the GPS. Also make sure that it is properly calibrated.. 

  7. 9 hours ago, shibu said:

    I am planning to make a drone for aerial photography. I am facing difficulties deciding cameras and gimbals for the drone. i have no idea as to how a gimbal can be connected wirelessly. Please help me. 

    UAV camera gimbals usually have some sort of interface for controlling pitch and pan via the same radio that is used for controlling the UAV. For example the camera gimbal that I used on mine awhile ago was the Tarot T4-3D which has both PWM and S.BUS interfaces and so connects to the same receiver that is used to interface to the flight controller. I just assigned a couple of slider controls on my transmitter to control pitch and pan. If I was planning to build a more professional UAV then I would consider Gremsy . Also in some high end UAVs you might want to have a 2 operator configuration, one flying the UAV and one operating the gimbal and camera in which case you would install 2 receivers. 

  8. Thanks @Chase Flynn | UAV Coach for the information on flying in and around Sacramento as I live not too far from Sacramento and Folsom. These days I mainly fly at our local AMA club which is similar to the one in Davis that you had on your list of 5. One thing to point out when flying at an AMA site is you need to be both a member of the club and also the AMA


    Clubs usually have a guest policy but you still need to be an AMA member and permission to fly at their field.

    Our city of Roseville allows flying in designated areas of some of its parks but does require the purchase of an annual permit and of course park rules as well as FAA rules must be followed.


    I haven't flown in Folsom state park but understand that it is allowed. The main reason is its $12 each time you enter the park although of course annual passes are available.

  9. 6 hours ago, erfan said:

    the problem was I was doing it indoor , And EKF was showing red, When I went outdoor EKF became white and the problem was solved!!!!!!

    Interesting I would have though that until the EKF shows white it would not have allowed you to arm i.e part of the pre-flight checks. Sometimes the GPS  can't get a fix from a sufficient number of satellites when indoors but that should also have also stopped you from arming unless you have the arming checks disabled. 


    Maybe EKF is not part of those checks. I'll have to look into that further. Anyway glad that its working now.

    • Like 1

  10. 4 hours ago, erfan said:

    Yes I do not put the throttle in in Minimum but at middle or above even!

    With the throttle above minimum is it still automatically disarming or does it stay armed ?

    4 hours ago, erfan said:

    I also disabled the bitmask but still the Problem is there. 

    After changing the LOG_BITMASK to 0 did you save the parameters and reboot the flight controller by removing and reconnecting the battery ?

  11. 5 hours ago, erfan said:

    I did Motor Compass calibration on the Mission planer for my hexcopter.

    it Shows a high amount of  interfernce which is too high .
    does anyone know how to decrease this much interference ? 

    Are you using the internal compass of the HKPilot32 or an external one located in a GPS?. As the compass is susceptible  to electrically interference Its better to use an external compass mounted well away from the power distribution and motors. Usually the compass/GPS combo is mounted on a stand. You can disable the internal compass in MP and just calibrate the external

  12. 4 hours ago, jacquelin said:

    Good evening,

    I’m Anne-Line from Partage dans le monde french NGO.
    Our medical team is in Kathmandu, and the drone operator we hired has just let us down. We need a drone operator in two days to film our medical mission. Would you have contacts to provide us?
    Many thanks

    I really don't know much about this company except what they post on their website but they do have a location in Napal.


    They are associated with 


  13. 1 hour ago, erfan said:

    and on the screen after a frew seconds Shows land and disarmed my copter. 

    One thing to be aware of is that if you arm but leave the throttle at zero for 15 seconds Arducopter will automatically disarm.

    1 hour ago, erfan said:

    BUT When armed the first two modes and mode 5 are changing on the hub but also at the same time for some seconds one error appearing on the hub indicating flight mode changed failed.
    and I am no longer able to go to 3 and 4 and 6 flight modes

    To me it still sounds like the Telemetry connection is having issues when armed. One thing to try is to go to RC Calibration and check to see if the PWM values are changing when you toggle the flight mode switch/s. Compare them when disarmed and armed. You could also try disabling logging again by setting parameter LOG_BITMASK to 0.

  14. 4 hours ago, erfan said:

    Do I Need to Change anything in  the full Parameter list  for my hexcopter ?

    Had you changed any parameters with the previous version ?. Normally when upgrading to a later version the parameters are preserved but its always good to make sure. Each time I change a parameter from the default I make a note of it and also will save the list to a file with mission planner. Were you able to bench test the issue that you had with flight modes ? As you may know when bench testing you should remove the props.

  15. 3 hours ago, erfan said:

    No Idea what is that....

    From what I understand that's related to a recent service note for the CubePilot flight controller hardware (it was called Pixhawk2.1 but they changed the name to CubePilot). As the CubePilot has redundant sensors there was an issue when a sensor fails and provides incorrect data. Apparently instead of switching to a good sensor it was switching to a bad sensor with obvious consequences. Since this can happen on cubes purchased this year I don't believe you will have the same issue with your controller. At least install it to perform a bench test to see if you original problem of flight modes is still there or not.

  16. @erfan you should be able to simply install the firmware using this procedure.


    In summary go to "Initial Setup" in MP and select firmware, this will display a bunch of icons representing the type of craft and underneath the latest stable version. Connect the PC running MP to the flight controller using the USB but do not select "connect" in the upper right corner. Simply click on the appropriate icon and MP will detect the flight controller hardware and install the appropriate firmware. Now this maybe the issue since this is not a true Pixhawk but the HKPilot32 and I am not sure what board type is that is sending back to the MP. Anyway try this procedure and let me know if you get any errors. Also note that if you are asked to "upload Chibios" say yes as this is now the operating system that Ardupilot is using instead of Nuttx.  

  17. 21 minutes ago, erfan said:

    1) yes on the left top Corner . Mission planer 1.3.66

    ok, but on the same line after the Mission Planner version it should also display the version of software running on the flight controller although in order for MP to obtain that information you have to connect it to the flight controller either via the USB or radio link. 

    "Mission Planner build 7054.36589 Arducopter 3.6.8"

    28 minutes ago, erfan said:

    3 ) i attached the photo of mine (HKPilot32) hardware version is pix 4 version 2 hexa

    It seems that this hardware is based on the Pixhawk. Are you running the firmware that was pre-installed on this hardware or did you use Mission Planner to install the firmware ?