Controlling Arduino from a web app over Ethernet

Projects Networking, Protocols, and Devices
1

Hello Everyone,

I'd like to control my Arduino from a web app. The web app will run on a web server that won't be on the same network as the Arduino. If I press a button on the web app, the server sends a a request to the Arduino and it does something (e.g. turn on a LED). I'd like to connect my Arduino to the Internet via an Ethernet shield.
How can I send a request to the Arduino if I don't want/can't use Dynamic DNS and my IP address is not static?
Thank you for your help in advance!

Máté

2

Have the arduino initiate the connection to the server so the server knows its IP.

3

Be sure to design in feedback from the Arduino is you want to control it.

4

I just have to send a GET request to the server? And if yes how often?

5

As often as it requires, I guess?

6

I'd like to create a system like Blynk. Whenever I press a button on the web server the Arduino will do something.

7

I don't know what that is.
If you don't have experience doing something like this, Adafruit.io may have all the capability you need built in, and they have a free tier.

8

You can use an ESP32 to do this, not ethernet, but WIFI.

Google

Randomnerds

9

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