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I can connect a device to my (headless, if it counts) Raspberry Pi 3B through Bluetooth protocol using the following steps : bluetoothctl and on this program, I run

 - agent on
 - default agent
 - pair XX:XX:XX:XX:XX:XX

prompt for the exchanged key ok

 - connect XX:XX:XX:XX:XX:XX
 - trust XX:XX:XX:XX:XX:XX

Then I can check that

bluetoothctl # paired-devices

indeed contains my device.

But after a reboot, and check of the same command, the list is empty, and I need to do again all the pairing steps.

How to remedy to this problem and keep the list of all devices somewhere ?

I think that the main problem I have to reconnect automatically after reboot, which is what I ultimately would like.

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    Possible duplicate of Bluetooth Devices List not being remembered on reboot
    – FraSchelle
    Dec 22, 2018 at 0:31
  • Sorry, I realised the solution was already discussed somewhere else : raspberrypi.stackexchange.com/q/43648/82347.
    – FraSchelle
    Dec 22, 2018 at 0:38
  • Welcome to the Raspberry Pi flavoured corner of Stack Exchange. It is always a good idea to search for questions that might already exist that answer your burning question directly. (As you also note) a duplicate already exists so this one will get closed off pretty quickly - but don't be afraid to ask something else! 8-)
    – SlySven
    Dec 24, 2018 at 2:50

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