Swapping the Serial Ports on Raspberry Pi 3

Swapping the Serial Ports on Raspberry Pi 3

If you don’t want to use the Bluetooth and you want that high performance /dev/ttyAMA0 back on the GPIO, you can do this via a device overlay called “pi3-miniuart-bt” i.e. use the mini-uart (/dev/ttyS0) for Bluetooth.

To use add the following line to the /boot/config.txt

sudo nano /boot/config.txt

and add (at the end of the file):

dtoverlay=pi3-miniuart-bt

Save and reboot for changes to take effect.

sudo reboot

You can check that it has worked by:

ls -l /dev

and you’ll see something like this:

Swapped Raspberry PI 3 serial port aliases

Another options:

If you want to disable the bluetooth all together, another overlay is available:

dtoverlay=pi3-disable-bt