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- Feb 22, 2019
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I'm sharing my tale of woe in the hopes that someone out there can tell me what I did wrong, or tell me what I could change to do things right. I know I make mistakes or have misunderstandings about how things work, but then I also know our technology and tools are far from perfect. We don't usually like to share our screw ups and misery, but maybe we like reading about other peoples? 
We traveled 3 hours to a remote site to survey 2 areas of city-owned land (forested areas with steep terrain, a few hiking/skiing trails cutting through them.) Our project is looking for a specific invasive vine that has spread widely through that area and ultimately chokes out and kills the trees it climbs. (google Oriental Bittersweet.)
We brought two drones: a mavic 2 pro (using my android phone with the controller) and a phantom 4 pro v2 using an ipad mini with the flight controller. We have 3 batteries for each drone. We are using the drone deploy app for mission planning and flight control.
We flew the first area with the Mavic drone. (using the android version of the drone deploy app.) A few minutes into the first battery, the android app reported it had lost connection with the drone. I've seen this before, but usually it reestablishes right away and everything is ok. Meanwhile, the mavic hand controller (LED display) is happy as can be, reporting distance from launch point, battery %, rotor rpm, live updating, etc.
In this case, the android drone deploy app never got it's connection back, although the drone had it's flight plan and continued flying to the end of the battery just fine. At 18% battery the mavic hadn't decided to come home, so I called it home from the hand controller.
When I switched batteries and was ready to start the 2nd flight and resume the route, the drone deploy app recovered it's connection on it's own, but then I discovered the drone deploy app had no knowledge of any of the portion of the first flight after it lost the connection. So it could only resume the flight at whatever point we were at 5-6 minutes into the first flight. What can you do ... so I said ok, and ended up with the 2nd battery/flight mostly overlapping the area we covered with the first flight.
The app connection was ok throughout the 2nd flight and the mavic returned on it's own at the end of the battery (about 20%). I swapped batteries and kicked off the 3rd and final mavic flight and everything worked fine on the 3rd flight too.
The first area wasn't a complete disaster, but we ended up not being able to cover nearly the amount of ground we were hoping to because of the drone deploy app screw up. Has anyone seen anything like this before? Is there any quick tips or suggestions I could have done to work around the problem and maximize my time, my batteries, and the area I want to cover?
This was just the start of my woes though ...
After finishing with the mavic, we relocated to the second area and unpacked our phantom 4 pro v2 with ipad ground station ... also planning and flying with the drone deploy app. The android and iphone versions of the drone deploy app are similar, but not identical.
Here we launched the first flight normally and everything looked good. Our preplanned route/area came up and we happily sent off the drone to begin at the one end of the area. But midway through the flight, new weirdness which I have never seen set in.
The live video (looking down) was working fine, but all the other aspects of the drone deploy app became super laggy. It would only update the route location, battery %, number of pictures taken every minute or two. When I touched the screen to expand the video (or expand the route map) it would take forever to respond ... even though the live video was happily scrolling along. Even though the app was severely misbehaving, the phantom came back at about 20% battery and landed just fine. I don't think we every got more than 800 or 1000' away from our launch point in this flight and I've never seen anything remotely like this before with our phantom or DD on the ipad.
We swapped batteries, and prepared to resume the mission with our 2nd battery, but now the DD app was severely lagging and taking dozens of seconds to respond to screen taps. We somehow managed to get through the checklist and the launch drone icon turned green. We tapped the launch icon and the DD app switched to the in-flight screen mode, but nothing happened. The phantom just sat there and the props never spun up . The DD seemed to think all was well, like it was expecting the drone to do something now. The app offers a pause and restart button on the screen, but pausing and restarting didn't help.
Over the next 30 minutes we tried everything including power cycling the phantom, power cycling the hand controller, power cycling the ipad, reloading the route. At some point, some combination of our efforts worked, and the phantom spun up, took off and correctly resumed the mission.
However, it was apparent right away the DD ipad app was still severely lagging. The video display still worked great and portions of the flight were directly over head so it wasn't like we had roamed too far away when this was going on. At some point the data from the phantom stopped updating (video still ok) and I remember the ipad saying 64% battery. It never changed from there. Thankfully, when the battery got down to about 20%, the phantom dutifully flew back home and landed just like it was supposed to. The SD card had the right amount of pictures so that part worked ok. At least we got some data.
However, from there things just got worse. We spent the next hour trying to get flight 3 started. We power cycled everything multiple times. The DD app on the ipad was just super unresponsive. We could get through the checklist and click the green launch arrow, and the phantom would never spin up. We iterated on all the combinations of restarting things we could, including remaking a route from scratch that was about the area we hadn't net finished and nothing worked.
We worked on trying to get flight #3 launched for about an hour and finally gave up.
So the tally for the day was ... mavic wasted most of one whole battery reflying most of the area of the previous flight because the DD app somehow lost track of the mavic's progress on flight 1 and never regained it ... even when the mavic was directly overhead. And the phantom wasted a whole battery because we literally could not get it launched with the DD ipad app and the app was severely lagging and misbehaving in ways I've never seen before. Because of this we almost didn't get flight 2 off (and wasted a portion of the 2nd battery just sitting on the ground powered on for 20-30 minutes.)
I'm especially frustrated because I don't understand why these things went wrong or what I can do next time out to fix them. I do know that my android DD app updated since the time I had been out flying previously. I also know that new firmware came in for the phantom 4 since my last time out and I said yes to updating that at home about a week ago. But arghhh! This can't be the state of the art, is it? Am I missing something? Did I make an obvious blunder that everyone else knows about except for me? I want to like DD and I want to like DJI but I was beyond frustrated yesterday and possibly into the territory of saying certain words. Help me out here!
Thanks!
Curt.

We traveled 3 hours to a remote site to survey 2 areas of city-owned land (forested areas with steep terrain, a few hiking/skiing trails cutting through them.) Our project is looking for a specific invasive vine that has spread widely through that area and ultimately chokes out and kills the trees it climbs. (google Oriental Bittersweet.)
We brought two drones: a mavic 2 pro (using my android phone with the controller) and a phantom 4 pro v2 using an ipad mini with the flight controller. We have 3 batteries for each drone. We are using the drone deploy app for mission planning and flight control.
We flew the first area with the Mavic drone. (using the android version of the drone deploy app.) A few minutes into the first battery, the android app reported it had lost connection with the drone. I've seen this before, but usually it reestablishes right away and everything is ok. Meanwhile, the mavic hand controller (LED display) is happy as can be, reporting distance from launch point, battery %, rotor rpm, live updating, etc.
In this case, the android drone deploy app never got it's connection back, although the drone had it's flight plan and continued flying to the end of the battery just fine. At 18% battery the mavic hadn't decided to come home, so I called it home from the hand controller.
When I switched batteries and was ready to start the 2nd flight and resume the route, the drone deploy app recovered it's connection on it's own, but then I discovered the drone deploy app had no knowledge of any of the portion of the first flight after it lost the connection. So it could only resume the flight at whatever point we were at 5-6 minutes into the first flight. What can you do ... so I said ok, and ended up with the 2nd battery/flight mostly overlapping the area we covered with the first flight.
The app connection was ok throughout the 2nd flight and the mavic returned on it's own at the end of the battery (about 20%). I swapped batteries and kicked off the 3rd and final mavic flight and everything worked fine on the 3rd flight too.
The first area wasn't a complete disaster, but we ended up not being able to cover nearly the amount of ground we were hoping to because of the drone deploy app screw up. Has anyone seen anything like this before? Is there any quick tips or suggestions I could have done to work around the problem and maximize my time, my batteries, and the area I want to cover?
This was just the start of my woes though ...
After finishing with the mavic, we relocated to the second area and unpacked our phantom 4 pro v2 with ipad ground station ... also planning and flying with the drone deploy app. The android and iphone versions of the drone deploy app are similar, but not identical.
Here we launched the first flight normally and everything looked good. Our preplanned route/area came up and we happily sent off the drone to begin at the one end of the area. But midway through the flight, new weirdness which I have never seen set in.
The live video (looking down) was working fine, but all the other aspects of the drone deploy app became super laggy. It would only update the route location, battery %, number of pictures taken every minute or two. When I touched the screen to expand the video (or expand the route map) it would take forever to respond ... even though the live video was happily scrolling along. Even though the app was severely misbehaving, the phantom came back at about 20% battery and landed just fine. I don't think we every got more than 800 or 1000' away from our launch point in this flight and I've never seen anything remotely like this before with our phantom or DD on the ipad.
We swapped batteries, and prepared to resume the mission with our 2nd battery, but now the DD app was severely lagging and taking dozens of seconds to respond to screen taps. We somehow managed to get through the checklist and the launch drone icon turned green. We tapped the launch icon and the DD app switched to the in-flight screen mode, but nothing happened. The phantom just sat there and the props never spun up . The DD seemed to think all was well, like it was expecting the drone to do something now. The app offers a pause and restart button on the screen, but pausing and restarting didn't help.
Over the next 30 minutes we tried everything including power cycling the phantom, power cycling the hand controller, power cycling the ipad, reloading the route. At some point, some combination of our efforts worked, and the phantom spun up, took off and correctly resumed the mission.
However, it was apparent right away the DD ipad app was still severely lagging. The video display still worked great and portions of the flight were directly over head so it wasn't like we had roamed too far away when this was going on. At some point the data from the phantom stopped updating (video still ok) and I remember the ipad saying 64% battery. It never changed from there. Thankfully, when the battery got down to about 20%, the phantom dutifully flew back home and landed just like it was supposed to. The SD card had the right amount of pictures so that part worked ok. At least we got some data.
However, from there things just got worse. We spent the next hour trying to get flight 3 started. We power cycled everything multiple times. The DD app on the ipad was just super unresponsive. We could get through the checklist and click the green launch arrow, and the phantom would never spin up. We iterated on all the combinations of restarting things we could, including remaking a route from scratch that was about the area we hadn't net finished and nothing worked.
We worked on trying to get flight #3 launched for about an hour and finally gave up.
So the tally for the day was ... mavic wasted most of one whole battery reflying most of the area of the previous flight because the DD app somehow lost track of the mavic's progress on flight 1 and never regained it ... even when the mavic was directly overhead. And the phantom wasted a whole battery because we literally could not get it launched with the DD ipad app and the app was severely lagging and misbehaving in ways I've never seen before. Because of this we almost didn't get flight 2 off (and wasted a portion of the 2nd battery just sitting on the ground powered on for 20-30 minutes.)
I'm especially frustrated because I don't understand why these things went wrong or what I can do next time out to fix them. I do know that my android DD app updated since the time I had been out flying previously. I also know that new firmware came in for the phantom 4 since my last time out and I said yes to updating that at home about a week ago. But arghhh! This can't be the state of the art, is it? Am I missing something? Did I make an obvious blunder that everyone else knows about except for me? I want to like DD and I want to like DJI but I was beyond frustrated yesterday and possibly into the territory of saying certain words. Help me out here!
Thanks!
Curt.