[SOLVED] How to automatically accept bluetooth pair request without popping confirmation dialogue box in raspberry pi through terminal or through SSH

Issue

I need to accept the bluetooth pair request in raspberry pi without manual confirmation. My task is to send a pair request from Android phone to raspberry pi 3 and to automatically accept the pair request based on MAC address of mobile, But it asking manual confirmation in raspberry pi, how can i automatically accept the request,

when i pass the below commands .bluetoothctl .power on .discoverable on and made a request from Android device, manual confirmation is asking for authentication

how to achieve this, without manual confirmation

Solution

As ukBaz suggested, you can do this by setting your IO capabilities to NoInputNoOutput.I would recommend sending the following sequence of commands to achieve this:-

sudo btmgmt power off
sudo btmgmt discov on
sudo btmgmt connectable on
sudo btmgmt pairable on
sudo btmgmt power on
sudo btmgmt io-cap 3

The last command sets your IO capabilities to NoInputNoOutput, and the numberical values correspond to the following:-

0       DisplayOnly
1       DisplayYesNo
2       KeyboardOnly
3       NoInputNoOutput
4       KeyboardDisplay

You can then set this with bluetoothctl as well via the following commands:-

bluetoothctl --agent NoInputNoOutput

Have a look at the links below for more info:-

• Raspberry Pi BLE pairing/encryption
• BLE pairing the Raspberry Pi 3 Model B
• Bluetoothctl set passkey

Answered By - Youssif Saeed

Answer Checked By - Senaida (WPSolving Volunteer)