The article is a tutorial on how to control 16 relay through Arduino microcontroller with Ethernet shield W5100. Hello, I'm going to share again with another project that helps many of you to solve ...

This tutorial shows how to build a basic IoT device using an Arduino Uno (R3) board equipped with an Ethernet Shield (W5100). The device is configured both as MQTT publisher (for publishing local ...

In this example, you will use your Ethernet Shield and your Arduino to send and receive text strings via the UDP protocol (Universal Datagram Packet). You'll need another device to send to and from.