Guide on how to setup a OBDII ELM327 Reader on our Android 8.1 devices

Select Apps

Select Bluetooth
Select Bluetooth Settings

Change Device Pin by selecting the button there
Change Pin from the Default 0000 to 1234. Select OK once done
Select Pair Menu

Hit the Search button
OBDII should appear under Usable Devices.

Select OBDII and when highlighter, Select Number 2 to paid.

If the above guide does not work, try remove all paired devices and pair the OBDII first before any other device. Once paired, you can then pair all other devices.