Test auto-reconnect To test this you'll probably have to use an old site since I didn't disconnect using master version. I used a Moodle 2.6 with local_mobile to test this. Connect to a chat in Mobile as a user. Go offline. In Moodle web, login as another user and open the chat too. Send a message and wait for the Mobile user to disconnect (not shown in the connected users). Now go online with the app. Check that you're reconnected and you receive the message sent while you were offline. Test send message delay Send messages using the app and check that you can see the sent message almost immediately after sending it (there was a 0-5 seconds delay before). Test reconnect Connect to a chat using the app. Simulate a server down. You can turn off your server, disconnect your router from Internet, change the WS code to make it fail, ... Check that a Reconnect button is shown in the app. Check that an error message is shown if you click reconnect while the server is still down. Make the server work again and click Reconnect. Check that you receive messages again.