Issue with DiagnosticsKey.SYSTEM_STATUS Not Updating at Critical Battery Level for M300 on MSDK v4.17

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Vlad Groshkov

• 2024年07月12日 08:59

Dear DJI Support Team,

I hope this message finds you well. I am writing to report an issue we have encountered with the Matrice 300 RTK (M300) using the DJI Mobile SDK (MSDK) version 4.17.

Issue Description

The DiagnosticsKey.SYSTEM_STATUS key does not update as expected when the M300 reaches a critical battery level. According to our understanding, the system status should change to "Unable to takeoff" once the drone's battery reaches a critical level. However, during our tests, we observed that this transition does not occur.

Test Details

To investigate this issue, we developed a specific Android test application that logs the value of the DiagnosticsKey.SYSTEM_STATUS key. The following steps were undertaken:

1. We set a predefined critical battery level for the M300.
2. The drone was operated until it reached the specified critical battery level.
3. The system status was monitored and logged throughout the test.

Despite the drone reaching the critical battery level, the DiagnosticsKey.SYSTEM_STATUS did not change to "Unable to takeoff" as expected.

Impact

This issue is of significant concern as it affects our ability to rely on the system status for operational decisions, particularly those involving battery management and safe operation of the drone.

Request

We kindly request your assistance in resolving this issue. Specifically, we seek clarification on the following points:

1. Is there a known issue with DiagnosticsKey.SYSTEM_STATUS not updating at critical battery levels on MSDK v4.17?
2. Are there any workarounds or solutions to ensure the system status accurately reflects the drone's ability to take off under critical battery conditions?
3. Could this be related to specific configurations or settings that we might need to adjust?

We appreciate your prompt attention to this matter and look forward to your guidance. If additional information or logs are required, please let us know, and we will be happy to provide them.

Thank you for your support.

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  DJI Developer Support

  • 2024年07月15日 07:59

  Could you provide us with some information? 1. What does the critical level of the battery refer to? 2. What is the current status displayed on the official App? We have not received similar inquiries before, so it should not be a known issue.

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  Vlad Groshkov

  • 2024年07月17日 15:24

  1. The critical charge of the battery is in terms of MSDK4 - Serious Low Battery Warning Threshold;
  2. In the official app I saw the red message in the status bar - "Unable to takeoff";

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  DJI Developer Support

  • 2024年07月18日 07:06

  If the value obtained by MSDK is different from the official app, this could be a problem. What is the value you obtained on MSDK? Can this issue be consistently reproduced? What is the critical low battery threshold you have set?

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  Vlad Groshkov

  • 2024年08月05日 20:13

  The battery percentage was set to 37%.
  An android test was written that reproduces this problem: Serious Low Battery Warning Threshold is reached, but at the same time, a new "Ready to go (GPS)" status comes from the MSDK within 2 seconds.
  This problem is always can be reproduced.

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