Yes the Raspberry Pi can scan and read the data from BLE Beacons.
There are lots of different beacon data formats, one of the more popular is the Eddystone format. https://github.com/google/eddystone
There are dedicated beacon manufacturers of beacons that will run on coin cells for a year+.
If you wanted to create something yourself, then boards like the ...
Finally solved it !
I thought this was an issue and searched how to "fix" it but it is an intended behaviour.
20.04 solution (source [FR]):
Install the pi-bluetooth package:
sudo apt-get install pi-bluetooth
Edit the /boot/firmware/usrcfg.txt file to add the following line at the end:
Check that the device ...
If you have a look in the /boot/overlays/README file you will see that the folk at RPF/RPT have tried to sort this out by actually renaming the file:
This overlay has been renamed disable-bt
Unfortunately, the internet never keeps up 😢 so you will not find a pi4-disable-bt option. You can continue to use the pi3 command but I would use the disable-bt ...