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I'm trying to connect a lego ev3 with micropython to a raspberry pi via bluetooth. Installed bluez and blueman on raspberry. I made the lego address trusted and connected it via the command line using sudo rfcomm connect hci0 <address>. The pairing is set for a few seconds, after which it issuesCan't connect RFCOMM socket: Connection refused. When lego initiates the connection, the same situation occurs, and the display showsGDBus.error:org.bluez.error.failed:Protocol not available.

I reinstalled bluez, deleted the connected devices, but it didn't help.

oleg
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  • Your question seems off-topic for Stack Overflow. Over at Ask Ubuntu, however, such a problem has already been [discussed and solved](https://askubuntu.com/questions/1115671/blueman-protocol-not-available). – Risto Aug 09 '23 at 12:06

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Bluetooth connect with Lego EV3 available via network connect. https://github.com/ev3dev/ev3dev/issues/1280#issuecomment-1186266809

oleg
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