[Bluez]1.Download install Bluez on Ubuntu

Download and Install

extracted it and built it:

xz -d bluez-5.64.tar.xz
tar -xvf bluez-5.64.tar
cd bluez-5.64

**Read the README! **It lists the dependencies and the configure switches

sudo apt-get build-dep bluez 

fix it

sudo cp /etc/apt/sources.list /etc/apt/sources.list~
sudo sed -Ei 's/^# deb-src /deb-src /' /etc/apt/sources.list
sudo apt update

To configure run:

./configure --prefix=/usr --mandir=/usr/share/man \
                --sysconfdir=/etc --localstatedir=/var

sudo apt install python-docutils
sudo which rst2man

Configure automatically searches for all required components and packages.

To compile and install run:

make && sudo make install

pip3 install docutils 

After installing, you should find bluetoothd in  /usr/libexec/bluetooth . You should also see bluetoothd in  /usr/lib/bluetooth .

Go to each of these directories and type

bluetoothd -v 

 You'll note that the one in libexec is new and the one in lib is old.

In order to make sure that d-bus is talking to you new BlueZ 5.64 and not your old BlueZ 5.48, you need to tell systemd to use the new bluetooth daemon:

sudo vim /lib/systemd/system/bluetooth.service

Make sure the exec.start  line points to your new daemon in  /usr/libexec/bluetooth .

For me, that wasn't enough. No matter what, upon restart I always got bluetoothd 5.48... So I just created a symlink from the old one to the new.

First rename the old file:

sudo mv /usr/lib/bluetooth/bluetoothd /usr/lib/bluetooth/bluetoothd-548.orig

Create the symlink:

sudo ln -s /usr/libexec/bluetooth/bluetoothd /usr/lib/bluetooth/bluetoothd
sudo systemctl daemon-reload