I want develop the OSDK application,I deployed the OSDK development environment ,and then I run the sample,but I failed ,because some error ocurred,said I need check the   app_id and app_key ,but I confirmed there is no mistake about this message

The error prompt of NEW_DEVICE_ERROR means that the first operation of OSDK of DJI aircraft needs to be activated. The specific operation steps are as follows (for example, DJI M210 RTK V2) :
1. Connect DJI M210 RTK V2 via USB cable to the PC running DJI Assistant2 for Matrice (ensure that the PC can be connected to the Internet normally) and confirm that the device is correctly identified.
2. Re-run the DJI OSDK sample twice to complete the activation.

.aa Posted at 5-20 22:38
The error prompt of NEW_DEVICE_ERROR means that the first operation of OSDK of DJI aircraft needs to be activated. The specific operation steps are as follows (for example, DJI M210 RTK V2) :
1. Connect DJI M210 RTK V2 via USB cable to the PC running DJI Assistant2 for Matrice (ensure that the PC can be connected to the Internet normally) and confirm that the device is correctly identified.
2. Re-run the DJI OSDK sample twice to complete the activation.

the DJI Assistan2 can recognize the device,and the enable api control has been checked
I use the cell phone and pad with Pilot APP,the device also can identified ,and can connect to the aircraft ,but I can see there are any information about activation

It is recommended to try the following:
1. Do not connect to DJI Pilot, only connect to DJI Assistant 2 for Matrice (the latest version is V2.0.11)
2. Make sure the PC running Assistant 2 is connected to the Internet
3. Rerun the DJI OSDK program twice (is there any change in the DJI OSDK log?)
If it still cannot be activated, it is suggested to switch the network and try again. In some areas, the CMCC network may not have access to the server.

In addition, may I ask what version of OSDK you are using? and what is the firmware version of M210 RTK V2?

xiao long Posted at 5-21 20:06
It is recommended to try the following:
1. Do not connect to DJI Pilot, only connect to DJI Assistant 2 for Matrice (the latest version is V2.0.11)
2. Make sure the PC running Assistant 2 is connected to the Internet

of cause I have to used the DJI Assistant2 to enable API control,but it seems doesn't work,and the version of OSDK is 4.00 ,and the firmware is 3.4.3.37

djiuser_xing Posted at 5-21 21:10
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I find some problem ,the document of OSDK said it need the firmware is 01.00.0670 least ,but in DJI assistant the lastest firmware is 01.00.0590

01.00.0590, this version of firmware does not support OSDK4.0 development, you can send an email to DJI (dev@dji.com) to request the latest firmware.

Mark! this helps!