BT: RPi Zero HC 06 - cyberxml/pentos GitHub Wiki

/boot/cmdline.txt

dwc_otg.lpm_enable=0 console=ttyAMA0,9600 console=tty1 root=PARTUUID=60c88af9-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

/boot/config.txt

dtoverlay=pi3-miniuart-bt

pin out

http://tinkersphere.com/1412-thickbox_default/bluetooth-module-hc-06-arduino-compatible.jpg

Consider this project

https://circuitdigest.com/microcontroller-projects/voice-controlled-home-automation-raspberry-pi