Raspi3 HA and Bluetooth

I’ve read so much in the last two days, but i didn’t get it.
I want to read my Lifepo4 akku over Bluetooth.

Started to install HA on a Raspi3, installed the Bluetooth integration
image

Thats it, my Smartphone found 5 BT Devices nearby (nRF Connect) HA none.
Tried to add Bluetooh: to configuration.yaml, doesnt help

so i think i missed a important step.