No introspectable Error

[Vishal8523]

While running the node_bluez, I am getting the following error:
This error is caught at bluetooth.init() itself.

{ message: 'No introspectable',
  stack: 'Error: No introspectable\n    at /home/root/node_modules/dbus/lib/bus.js:131:15' }

Appreciate your help in resolving this critical issue.

[Niels-Be]

This is probably due to either version incompatibility or insuffient permissions.
You need Bluez Version 5.
Check that you have permissions to access bluez via DBus, e.g. try as root.

[Vishal8523]

The Bluez Version used is 5.54
And the Bluez has root permissions as well.

[marciopamplona]

This is a permissions problem for sure.
Check your dbus policy.

[Bunagana]

Hi @Vishal8523, were you able to solve this issue? I am running into the same issue when calling bluetooth.init() from an Electron app. Thanks

[Bunagana]

@marciopamplona, would you be able to elaborate on your comment, please.

@Waeco, could this issue be related to Shouqun/node-dbus#159
I was not able to reproduce this issue with the next-dbus branch.

[marciopamplona]

Assuming the 'pi' is the user running your app.

ADD USER 'pi' TO bluetooth GROUP:
sudo adduser pi bluetooth

ADD POLICIES TO DBUS SERVICE:

• Edit the default policies in '/etc/dbus-1/system.d/bluetooth.conf'
• Edit the bluetooth group to this:

  <policy group="bluetooth">
    <allow send_destination="org.bluez"/>
    <allow send_destination="org.bluez"/>
    <allow send_interface="org.bluez.Agent1"/>
    <allow send_interface="org.bluez.MediaEndpoint1"/>
    <allow send_interface="org.bluez.MediaPlayer1"/>
    <allow send_interface="org.bluez.Profile1"/>
    <allow send_interface="org.bluez.GattCharacteristic1"/>
    <allow send_interface="org.bluez.GattDescriptor1"/>
    <allow send_interface="org.bluez.LEAdvertisement1"/>
    <allow send_interface="org.freedesktop.DBus.ObjectManager"/>
    <allow send_interface="org.freedesktop.DBus.Properties"/>
  </policy>

[Bunagana]

Thank you @marciopamplona. Updating the .conf file did not resolve the issue.

[Bunagana]

The issue is caused by creating two instances of the system bus.