Lubuntu 17.10 Web IDE in chrome doesn't see Puck

Thanks for the update - glad you got it going in the end.

Web Bluetooth on Linux can be kind of picky. Once you have a newish Bluez (5.47 is fine) I've found the following sorts me out all the time:

• Restart Bluetooth sudo /etc/init.d/bluetooth restart (which you did) - this helps if you can connect but don't receive any data back from the device.
  
• If a device can't be found, manually start scanning for Bluetooth devices using the system Bluetooth menu