An example of sending an MQTT message to LED Site Indicator - internet connected LED. A test user and password is provided for review. Receiving of message is demonstrated.

Usage:

1. Open "client.html" in a browser, click on "Subscribe", then "Send".
2. Sign up for your own free account and test it out (after changing user, pass and destination in the code)
3. Upload the example Arduino firmware to your own D1 Mini

See led indicator website to learn more about this project.