1# Pan-Sensor Development
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4## Are the APIs used for obtaining PPG and ECG sensor data open to individual developers? (API version 9)
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6Data collected by the PPG and ECG sensors of wearable devices is personal privacy data. Therefore, relative APIs are not open to individual developers.
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9## What should I do when error code 201 is reported during the calling of a vibrator API? (API version 9)
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11**Symptom**
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13The following error message (error code 201) is reported when an API of the vibrator module is called:
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15vibrate fail, error.code: 201error.message: NaN
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17**Solution**
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19Permission verification failed. You must apply for the **ohos.permission.VIBRATE** permission.
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21**References**
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23[Declaring Permissions](../security/AccessToken/declare-permissions.md)
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