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  • 08:58
    DJI-Jerry commented #680
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  • Nov 26 01:49
    dji-dev commented #677
Leman FENG
@flm8620
Does anyone noticed the thread-safety problem in C++ example of Onboard-SDK? dji-sdk/Onboard-SDK#67
Justin Tuchek
@justintuchek
Hi - I am new to gitter, would somebody who has access/privilege be able to make an room for Mobile-SDK?
Rohit Sant
@rohitsantdji
@/all OSDK Devs: Time to vote! What would you rather have: (1) Continued support for low-power, low-cost embedded systems (STM32) or (2) OS-only SDK (Linux, ROS) that allows us to unify the SDK, add better support for thread safety, logging, cleaner architecture and fundamentally more capabilities (thanks to additional native libraries)?
Rohit Sant
@rohitsantdji

Also, check out OSDK 3.1.9, released last week. Adds a powerful new module - precision trajectory mission planning (uses advanced trajectory planning and control algorithms to execute geolocated trajectories). The precision trajectory feature has a slick interface for planning trajectories in the form of a SketchUp plugin that allows you to plan and visualize trajectories, and also observe the drone execute them in simulation. You can also import geo-located scenery to get a sense of the real execution of the trajectory. You can specify time intervals for pictures along the trajectory, and video can be captured as well.

Another thing we have added is the ability to record, in real time, Velodyne Puck LiDAR data into the popular LAS file format, standardized by the ASPRS and heavily used in the GIS, geo-informatics and surveying industries.

This release, as usual, comes with numerous additions and improvements to the core OSDK libraries - CMake support, Vagrant-based VMs for quick prototyping, threaded callbacks and camera/gimbal snippets in the Linux sample (as well as interfaces for all our new features) are just some of the additions to the SDK. Give it a spin! :smiley:

Justin Tuchek
@justintuchek
2!
geetesh
@geetesh
2 :D
Andre Nguyen
@andre-nguyen
2
I didn't even know people bothered with (1)
Alexandre Borowczyk
@AlexandreBorowczyk
definitively # 2
chukcha2
@chukcha2
2
3.1.9 looks like a big step in the right direction in terms of code organization/documentation. thank you.
Andre Nguyen
@andre-nguyen
We did this with the onboard-sdk ;)
Rohit Sant
@rohitsantdji
That looks great! :thumbsup:
Shengwei Ren
@XiaoR
hi guys, do anyone here know how to verify if the blocking api call timeout or return ACK succfully?
in my program, even if the blocking api call is timeout, i get the ack == 0 which also means it succeeds
Rohit Sant
@rohitsantdji
@XiaoR answered in your post on the DJI forum
Allan Matthew
@almatthew
Has anyone run into this error? ERROR validateSerialDevice,line 118: Failed to read from serial device. The Onboard SDK is not communicating with your drone.
I'm running an Ubuntu 16.04 image in a VM with an FTDI USB->serial converter that talks to an M100 UART
A couple others have the same problem: http://forum.dev.dji.com/thread-32834-1-1.html
I was previously able to communicate with the M100 using the Onboard-SDK demo applications, but I'm no longer ever able to communicate
I did a bit of digging and it appears that the serial read() is returning 0 bytes in LinuxSetup.cpp, which triggers that error. I know that I'm getting data over the serial line though, as I can connect minicom to the port and see data streaming in
Rohit Sant
@rohitsantdji

@allanm84 A USB->Serial converter will report that it is connected even if the UART end is left open. To avoid false positives, we have an additional check (validateSerialDevice) that looks at the broadcast data on the line. If it does not receive any data on the line it will return this error. In our tests, this check has proven to be quite robust.

A few questions: (a) What VM are you using? (b) Can you post a minicom log? I assume minicom is running on the same VM, is that right? (c) What baud rate are you trying comms at?

Rohit Sant
@rohitsantdji
@/all PSA: if you are having the std::runtime_error after cloning the 3.1.9.1 hotfix release and are using an M100, please revert to the 3.1.9 release. There is no functional difference between the 3.1.9 and the 3.1.9.1 releases for the M100 and for A3 units running FW 1.3.0.0 or below. We will fix the runtime error in an upcoming release. Apologies!
Rohit Sant
@rohitsantdji
UPDATE: The error has been fixed temporarily, so you can simply pull from gitHub to make it go away.
Allan Matthew
@almatthew
@rohitsantdji Thank you that fixed it!
YAM
@WindyYam
The dji phantom 4 pro is now available, does the old sdk appliable for this ? or should i wait for the new release?
Rohit Sant
@rohitsantdji

Great, that's good to know @allanm84.

@YamZYang Sorry, the P4 Pro does not support the Onboard SDK. If you are looking for Mobile SDK support, a future release of the iOS and Android SDKs will add support for the P4 Pro.

Allan Matthew
@almatthew
Is the only way to determine if the drone is armed trying to arm it and waiting for the ack? Or is the armed state somewhere in the broadcast data?
Allan Matthew
@almatthew
Is that also true of the flight mode (p/a/f)?
Aman Singh
@taurean1192
I am facing issues of target dependency not found in cmake for Onboard SDK Linux v3.2
anybody found a solution to these?
newtoniant
@newtoniant
What IDE are people using for the onboard SDK and STM32? The DJI docs say to use Keil uVision, however the SDK and example code compiles to way over the 32K free limit, and I've had difficulty compiling it with Atollic IDE. Suggestions?
Justin Huntington
@Corusco
I'm working on activating a recently purchased A3 FC to be used with the OSDK with ROS. I've been able to get past the SDK version bug by modifying the versionA3_32 const in DJI_Version.h, but now seem to be stymied by not being able to activate without some sort of connection to DJI GO to rectify the New device error. Using Lightbridge was not among our RC options. I also have the A3 connected to DJI Assistant 2 running on Mac. I had seen some thread about it being possible using Assistant running on a PC. Is this true? Are there any other ways to activate without a Lightbridge?
Javier Gutierrez
@comgeek
how to display Telemetry data with DJI Onboard SDK in the Linux example
Eduardo Cordeiro
@EduardoCordeiro
Hello. I have recently acquired a Matrice M100 and I am curently experience the error: "ERROR validateSerialDevice,line 118: Failed to read from serial device. The Onboard SDK is not communicating with your drone."
The same @allanm84 was complaining about.
It is my first time using an M100 and I cant seem to run any of the linux applications. Current Setup is a Linux Machine running 16.04 and a Windows 10 Machine for the DJI assistant connected over UART/TLL and Micro-Usb
I also did the command: sudo usermod -a -G dialout $USER
Rohit Sant
@rohitsantdji
@Corusco The non-Lightbridge activation is a work in progress. The next firmware release should offer a fully functional assistant-based method for activation - but the next firmware release will likely be toward the end of March. Apologies for the inconvenience.
@comgeek The linux sample app does not currently offer an example of telemetry data - however it is very easy to do. Modify the Linux sample and add a call to getBroadcastData(); The returned data structure should have all the telemetry data you enabled in DJI Assistant 2's SDK page. Call this in a loop to get it at some desired frequency.
Rohit Sant
@rohitsantdji
@EduardoCordeiro the error @allanm84 was facing was a bug that has been fixed in the hotfix release 3.1.9.1; the error you see is likely a real issue. To help debug, could you confirm that you:
  1. Enabled API control on DJI Assistant 2's SDK page
  2. Set baud rate to be the same on DJI Assistant 2 and in your UserConfig.txt
  3. Logged out and logged in after typing the sudo usermod -a -G dialout $USER command
Justin Huntington
@Corusco
@rohitsantdji Thanks for the update. We'll look forward to that release. Until then, we have a pretty nice Lightbridge 2 to fly with now.
Eduardo Cordeiro
@EduardoCordeiro
@rohitsantdji I have done all those steps, i re-did everything and and the same problem occurs.
dleal93
@dleal93

Hi. I've been trying to perform the M100's onboardSDK sample activation (https://developer.dji.com/onboard-sdk/documentation/github-platform-docs/PureQT/README.html) using QT Creator for Windows but it's not working. I typed the ID and Key pair obtained from DJI and then I opened the COM without any problems and received the following message:

STATUS QtOnboardsdkPortDriver::init,line 35: port COM5 open success
STATUS QtOnboardsdkPortDriver::init,line 42: BaudRate: 230400

Then, according to the tutorial from the link above (Activation - 7th step) I should click on the "version" button, but when I do absolutely nothing happens. There's no error nor any response from the application.

Ignoring this step, when I click on the "Activate" button, I get the following ERROR:

ERROR DJI:nboardSDK::CoreAPI::activate,line 388: Please call getDroneVersion first.

However, I believe this error is due to the fact that when I click the "version" button, nothing happens.
Does anyone have any idea as to why it is not responding to the "version" request?

Nithin Reddy Gaddam
@nithinreddygaddam
Hi, Is there a way to send data apart from video with the LightBridge has anyone done this in the past?
Nithin Reddy Gaddam
@nithinreddygaddam
@AlexandreBorowczyk - You mentioned you had success with ubnt product.. How does that work? did you use two transceivers?
chukcha2
@chukcha2
Hello, I'd like to communicate to OES using data transparent transmission using my app, while the drone is being controlled by DJI GO, Ground Control Station, or some other app. Is this possible? Thank you.
Andre Nguyen
@andre-nguyen
@nithinreddygaddam Yeah we used unifi. But basically get an airmax basestation like a Nanostation M and add a Bullet M to your quad. Do note though that the power drain is noticeable.
Nithin Reddy Gaddam
@nithinreddygaddam
@andre-nguyen what antennas did you use for the Bullet and what was the power rating for the POE adapter?
eyesonlyhack
@eyesonlyhack
Hi, I am trying to trigger a camera using the sdk but the camera functionality is not responsive. I cannot even get the gimbal values for the camera in the API. I am using the ZenMuse Z15 with Sony Alpha 7 R camera on the M600.