LED WebSite Indicator connects your website to an internet connected LED

When a visitor opens a page on your site, the LED blinks

  • Simple setup
  • Low-cost hardware
  • WordPress plugin
  • Python library available - add to your Flask or Django site easily
  • api to use with JavaScript
  • Free version


  • Connect up to 7 different websites
  • Each site has it's own LED colour
  • RGB LED in a custom designed housing

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All you need is a D1 mini ESP8266 device - with built in LED - and a WordPress website which can install plugins

Buy it for $2 on Aliexpress


Sign up at LED Indicator Sign Up page, then sign in as shown below. You will be shown your randomly generated User and Password values for the service.

sign in

Website Software:

WordPress Plug-in:

Install the LED-SITE-INDICATOR WordPress plugin on your site

The plugin is available on the WordPress plugin registry here

Or get it from source here: LED-SITE-INDICATOR github repo and zip it yourself

Installing the plugin for WordPress is easy, just go to Plugins -> Add New -> search for "led site indicator" in the "Search plugins" box

Don't forget to enable and activate the plugin

Go to settings -> LED-SITE-INDICATOR in the WordPress admin console

Enter the details from your LED Indicator account - Username and Password - as shown below

Colour box should be checked, type "LED" for this to work correctly

Full colour version - options are RED, GREEN, BLUE, CYAN, MAGENTA, YELLOW or WHITE

WP-MQTT settings


A python library is available from pypi. You can use pip to install it and the dependency:

  pip install paho-mqtt==1.5.1
  pip install led-indicator-messager==0.0.4

  from led_indicator_messager_package import led_messager
  # mClient = led_messager.LEDMessager(username, password, "GREEN") # initialise for paid version with colours
  mClient = led_messager.LEDMessager(username, password) #initialise for free version

  # Then anywhere in the code to trigger LED

Multiple instances are supported - eg mClient1, mClient2.. You could have one colour per web page or event.


You can use the paho JavaScript library for this

The host is ledmqtt.devsoft.co.za and the port is 9001 - example here

Sending MQTT from the front end is possible but not secure as your username and password will be visible in the console

An http api is available for easy sending of LED messages - see examples on github here

Arduino Firmware (free version):

Install the basic single LED Arduino sketch, but change the Username and Password values to match the ones from your Led-Site-Indicator account.

Run the sketch and visit your website in any browser - the D1 Mini's built in LED should light up!