How can webserver send data to ESP32?

[francinnov]

Hello,

I have an Arduino uno which communicates via UART with an ESP32 (WROOM-32) board. The ESP32 sends any update coming from the Arduino via POST request to my webserver.

From my webserver, I would like to send data to my ESP32 to update the Arduino UNO actions.

I'm not a specialist about HTTP protocol.
In a first approach, I wanted to make my webserver sends a POST request to my ESP32 which would store, in a variable, the data received.

• First question : Is it possible to send POST request to an ESP32 from a webserver ?

• Second question : Do you have any other idea, how to send data from my webserver to my ESP32 board ?

Thank you very much,

[WiFive]

Websocket or Mqtt

[chegewara]

Also if its not important to change UNO params in real time you can pool every minute, hour or so webserver and get response with new data for UNO.

[francinnov]

Thank you both of you for your answers !