Hello, I have a system that comes with BlueZ 5.43 installed on a single board computer (SBC). I have downloaded, built and installed various newer versions of BlueZ but I am having problems getting them working correctly. I have a peripheral (very similar to the gatt server example in the test directory) with one characteristic. My example was working before upgrading. However after upgrading, when I turn on notification for the characteristic it is not showing on the phone. I do see the notification turn up in dbus-monitor but not in btmon. signal time=1551910979.743011 sender=:1.38 -> destination=(null destination) serial=339 path=/ukBaz/bluezero/service0001/char0001; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged string "org.bluez.GattCharacteristic1" array [ dict entry( string "Value" variant array of bytes [ 78 14 ] ) ] array [ ] I have tried going back to version 5.43 again but now that is not working either. The configure I ran was: ./configure --prefix=/usr \ --mandir=/usr/share/man \ --sysconfdir=/etc \ --localstatedir=/var \ --enable-experimental \ --enable-maintainer-mode To get configure to work without error I needed to install the following: sudo apt install glib2. sudo apt install libdbus-1-dev libudev-dev libical-dev libreadline-dev I have tried various variations on this and done a lot of searching but don't seem to find an answer. Is anyone else seeing this issue? Anyone have any suggestions as what I could try? Thanks in advance, Barry