1# Pan-Sensor Development 2 3## Are the APIs used for obtaining PPG and ECG sensor data open to individual developers? 4 5Applicable to: OpenHarmony 3.1 Beta5 (API version 9) 6 7Data collected by the PPG and ECG sensors of wearable devices is personal privacy data. Therefore, relative APIs are not open to individual developers. 8 9## What should I do when error code 201 is reported during the calling of a vibrator API? 10 11Applicable to: OpenHarmony 3.2 (API version 9, stage model) 12 13**Symptom** 14 15The following error message (error code 201) is reported when an API of the vibrator module is called: 16 17vibrate fail, error.code: 201error.message: NaN 18 19**Solution** 20 21Permission verification failed. You must apply for the **ohos.permission.VIBRATE** permission. 22 23**Reference** 24 25[Applying for Permissions](../security/accesstoken-guidelines.md)