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Return To Home failure

Hey Guys,

I have just experienced two instances of return to home failure. I am using Map Pilot 2.1.6, Phantom 3 Professional - Firmware 1.9.6. iPad is on 9.3.3.

On both occasions, I am flying multi-battery, saved/off-line missions. on the DJI go app, I have set the low battery warning to trigger at 30%. I am under the assumption that once the low battery warning triggers, the mission will drop an abandonment point and return to home for a battery swap. However during these two flights, the return to home did not trigger and the mission continued (it was still flying along the track ,taking photos). I had to trigger the return to home manually on the screen to send the aircraft back home. 

Is there some setting that I am not aware of or are my assumptions wrong?

Thanks.

Kenneth Chan

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The low battery warning is just a warning and makes the remote beep as a heads up to the pilot. The aircraft knows how much battery it needs to get home and compares that with how far away and how high above the landing point it is and triggers the return to home when it absolutely needs to. It doesn't have anything to do with the battery warning set point.

https://support.dronesmadeeasy.com/hc/en-us/articles/206104736-Flying-Multi-Battery-Missions 

As noted in the link above you can set a timer or push the return to home button at any point.

Zane
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Hi Zane, thanks for the reply.

I was assuming that once the low battery level warning alarm triggers, the aircraft will automatically return to home after a ten second countdown where there has been no input/action from the pilot (as described in the Low Battery RTH section of the DJI manual)

What you have described above and mentioned in the link is labelled as "Battery Power Triggered Return To Home" Is that the same as what DJI calls "Smart RTH"? 

If the answer to the above question is yes and I disable Smart RTH on the DJI Go app, will the Map Pilot App still consider this Battery Power Trigger RTH as one of the conditions to return home?

The reason I ask all these questions is that I find that these Battery Power Trigger and Timer RTH conditions to be insufficient for me (safety margin wise) when there are so many variable conditions - especially head winds.

I would rather have the RTH trigger (preferably automatically) once the battery reaches my preset low level alarm. I believe this will give me more control and a better safety margin. Is this possible to set up automatically? Would I just have to manually press the Home button on the screen / remote control once it starts beeping?

 

Kenneth Chan 0 votes
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The process you are describing is likely how DJI Go works. 

A "Battery Power Triggered Return To Home" means the aircraft has determined that it needs to head home now in order to make it back before running out of power. Smart RTH is probably a feature in DJI Go. Map Pilot operates as described in the article and doesn't likely depend on other settings.

If you want it to operate off your set point we recommend you push the RTH button or the button in the app when you start getting the beep for low battery at your set trigger point.

 

Zane 0 votes
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Hi Zane, Thanks for the clarifications, much appreciated.  

Kenneth Chan 0 votes
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