How to restrict of accessing the services of a ble profile.

[MVR]

I am using proximity profile for my custom board as a tracker.I would like to make the services read/write operations accessable only to my andriod app.Others can connect to the tracker app and can see the services available in the device ,But i would like to restrict of read/write operation.without any pass key during the connection of app and ble device.

it would help me if Any suggestions?

[bjorn-spockeli]

You can set the security mode of the characteristic of your service by using BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(). This will require the peer to bond with the device in order to write/read the characteristic value.