- Open the app here
- Open it again in another tab (or phone/pc)
- Set your ID (any string, say '1')
- Set receiver's ID (say '2')
- Do the same on another phone/tab/pc (As per this example set your ID as '2', and receiver's as '1')
- All set. Now type messages and send and check if messages get delivered to another device/tab/pc/friend :)