Troubleshooting UPnP/DLNA and/or Chromecast discovery and connection issues

[Hi-Fi Cast Developer]

Discovery Issues

If Hi-Fi Cast cannot see your UPnP/DLNA and/or Chromecast devices then I suggest you try the following:

(NB. I would normally suggest that you check that your devices are switched on and connected to the same local network but of course you've done that already haven't you!)

• If the problem is with a UPnP/DLNA media server, check that the server software is actually running/enabled on the NAS/Router/Computer on which it is installed. Also ensure that your firewall software isn't blocking access.
  
• It could be a network problem. Rebooting your router can sometimes (often) help...so do it!
• You can also try rebooting your phone/tablet, media server, render and/or chromecast(s).
• Apparently some routers have problems with multicast networking on the 5GHz band so you could try disabling that on your router (or configure your devices to connect to the 2.4GHz band). This problem has been reported with the following routers:
• Fios Quantum Gateway
• Apparently some routers have problems with multicast networking when one device is connected via wireless and the other via a wired connection
  
• Apparently some routers have problems with multicast networking when the 'IGMP snooping' setting is enabled so you could try disabling that on your router

For Chromecast Devices:

• Check that the status light on the Chromecast is not flashing. If it is, there may be a network problem or the Chromecast might be installing new firmware.
• Ensure you are connected to the internet. An internet connection is required even when playing files from the local network (this is a Chromecast requirement - there's nothing I can do about it).
• For Chromecast Video devices, turn on your TV and check for error messages.
  

Connection Issues

If the app has discovered your Renderer/Chromecast but has connection problems when you play a song, you can try the following:

• Disconnect then reconnect to the device via the 'Select Playback Device' screen by selecting 'This Device' and then select your network device again
  
• Exit the Hi-Fi Cast app via the Exit menu item. Then open the app and try again.
• Exit the Hi-Fi Cast app by swiping it from the 'Recent Apps' screen (the notification in the status bar should also disappear). Then open the app and try again.
• Clear the playback queue AND hit Refresh from the Media Library screen menu (this will clear data cached from the Media Server). This may be required after media server configuration changes.
  

For Chromecast devices you can also try the following:

• Disconnect then reconnect to the Chromecast via the 'Select Playback Device' screen by tapping the 'Disconnect' button (if it is visible) and then the 'Connect' button
• Open the Google Home App, go to the devices screen (via the button on the right side of the toolbar) and tap STOP CASTING. Then try playing the current track again (if the Play/Pause button in Hi-Fi Cast is showing as a buffering icon then long-press it to get the Play button back).