Is there a library to receive notifications on ESP32 or ESP8266?

[Cool Javelin]

Hello:

I'd like to use an ESP32 and a series of LED status indicators, or a display, to show me the status of various parts of my home.

Some things may include: water pump on, garage door open, back door unlocked, etc...

I can use the ESP to poll various files and sensors, but I'd like to try to send it a notification instead.

I read a lot about how to send a notification FROM the ESP to Arduino, but I haven't found any instruction on how to send a notification TO the ESP.

Does that exist? Where might I look for it?

Thanks, Mark.

[JoeSensoric]

What kind of notification? Which technology?
I'm using MQTT to send and receive messages on ESP32.