usb_example/guidance_example fails at init_transfer() about guidance-sdk

[tangketan]

Please check if you start the SDK program too early: Guidance needs a while to prepare all data for SDK program, including stereo calibration params. So it is suggested to start your SDK program after the LEDs on Guidance Sensor turn solid green. which means Guidance is fully started.

[ompugao]

thanks for your quick response!

yes, I always confirm that all LEDs on sensors are green.

should i attach sensors somewhere? now, i'm trying to check if i can fetch data from guidance or not, so i just calibrate sensors one by one and launch usb_example program.
does it work correctly?

are there some extra procedures to save stereo calibration parameters to sensors?
I just launch guidance assistant and calibrate sensors following this video https://www.youtube.com/watch?v=hv4sJc9dezA .
guidance assistant saves parameters to sensors(?) automatically, right?

btw, after the LEDs become green, I can hear a low humming noise from sensors.
is it a correct behavior?

[ompugao]

any progress?

[eomargr]

I'm using Ubuntu 14.04, ROS Indigo and I'm experiencing the same error on GuidanceNode.cpp

I've calibrated all the cameras on Windows and then on Linux I've waited for green LEDs, but the error keeps showing:
llibusb_get_device_list ret = 8 !!!
Waiting for board ready...
Error: e_stereo_cali_not_ready at 237, .../src/Guidance-SDK-ROS/src/GuidanceNode.cpp

Even after waiting for more than ten minutes, the calibration parameters are missing.

Any clue what to do?

[eomargr]

DJI just released firmware 1.3.7, the problem was solved applying the update.

[ompugao]

good news!
where can i get the new firmware? via guidance assistant?

[eomargr]

You can update the firmware using the DJI's official software (assistant) for Windows.

[tangketan]

Yes, 1.3.7 solved the problem.
ompugao, sorry for the late reply..

[ompugao]

yeah! It works now! thanks a lot, guys!

[menzehua]

is there anyone have the software guidance assistant v1.2?thanks

[tangketan]

@menzehua luckily you can download it from here: https://www.dji.com/zh-tw/guidance/info#downloads