Discussions

switch to AUTO mode after arming

Posted by Ming Fan on July 9, 2016 at 2:46pm

Hi,

run into a problem: unable to switch to AUTO mode after arming the motors.

for example, first set to "Stabilize", then arm the motors, now UNABLE to switch to auto mode.

Am I doing something wrong? am I missing anything?   ( mine is apm3.3, have tried using mission planner, mavproxy, rc transmitter )

thanks in advance,

ming

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Replies

  • Craig July 9, 2016 at 10:45pm

    Glad you have it sorted. My next suggestion was to check the connections but you got it fixed so all is good and I'm glad it was an easy fix! :)

  • Ming Fan July 9, 2016 at 10:37pm

    Problem has been resolved.

    stab&althold gps lock, auto,loiter,rtl no lock, this led me think I might need to look at the connection between them.

    So I looked carefully through the cable connections between pixhawk and 3dr gps, and noticed there are two of them ( two connections) were loosened, ( one was pretty bad ),  so I replaced it with a new cable. now it is working. after I arm it, I can switch to auto or loiter or rtl mode now. before I could not.

    Thanks for reminding me the GPS portion ( 6 sats and <2.5 hdop ) which led me to look at the GPS. I was clueless.

    In deed, it was GPS caused my issue.

    Craig, thanks again for your help.

  • Ming Fan July 9, 2016 at 8:50pm

    I noticed one problem:

    only stabilize and althold modes have gps lock ( green light )

    once I switch mode, immediately "gps not lock" blue light starts blinking.

    read through:

    https://3dr.com/support/articles/210083423/advanced_failsafe_config...

    loiter, auto, rtl require gps lock.

    I am scratching my head not knowing why .... Shed some light please...

    thank you,

  • Craig July 9, 2016 at 5:58pm

    log files would help [not tlogs but the .bin on the hardware]

  • Ming Fan July 9, 2016 at 5:57pm

    yeah, I just re-tested and double checked sats and hdop which are 6 and 1.25

    I was looking at "Gps HOP" under "Quick" from mission planner, as long as in my back yard, it is < 1.62.

    define a plan, write wps. set to stabilize, arm,

    then just can't change to AUTO mode.  ( auto mode can't arm the motors, of course )

    So what am I missing still?

    thanks,

  • Ming Fan July 9, 2016 at 4:30pm

    Thanks for letting me know "6 sats" and "hdop<2.5", I didn't know these, and I will look into them.

    I am using mission planner 1.3.38, so I was doing:

    1. define a plan

    2. write WPs ( upload the plan )

    3. set mode to stabilize

    4. arm the motors

    5.switch to auto mode --- this step stops me. I tried it from mission planner, mavproxy ... just nothing happens. MP didn't show any error mesg.

    But I'll look into sats and hdop.

    thanks for your help.

  • Craig July 9, 2016 at 3:58pm

    are you waiting until your GPS shows at least 6 sats and a hdop of less than 2.5?

    Also are you connecting to the ground station [mission planner] as it will tell you why normally.

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