Secure BluetoothBLE Device

I want to make my commands only visible for the installer of the receiving device that knows the passkey. For a user I am looking to bind a Bluetooth device in android using a passkey with the app automatically, soo the key is only for the installer to know. How can I let the app bind android with device by using a passkey?

Mmm, this is Java!

Android developer

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I solve it with the READ_ENC property on the characteristics of the arduino... So a passkey is required to read the values out and writing values to it is with a WRITE property without access key.

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