Wiznet makers

This project demonstrates setting up a minimal Internet of Things (IoT) environment using an ATmega328P microcontroller along with a W5500 Ethernet module. The provided Arduino sketch configures the microcontroller to act as a simple server, facilitating network connectivity and data exchange.

Detailed Configuration and Code Analysis

Key Components:

• ATmega328P Microcontroller: A versatile and widely-used microcontroller, ideal for numerous DIY electronics and robotics projects.
• W5500 Ethernet Module: This module offers robust network capabilities, enabling the microcontroller to communicate over a TCP/IP network.

Code Configuration:

Interface Selection:

//#define USE_ENC28J60
#define USE_W5500

This part of the code allows for the selection between two types of Ethernet interfaces—ENC28J60 and W5500. Here, the W5500 is activated to demonstrate its usage.

Network Configuration:

#define MACADDRESS 0x30, 0xca, 0x8d, 0x9f, 0x5b, 0x89
#define MYIPADDR 10, 10, 4, 110
#define MYIPMASK 255, 255, 255, 0
#define MYDNS 10, 10, 0, 6
#define MYGW 10, 10, 0, 1
#define LISTENPORT 1000

These definitions set up essential network parameters like MAC address, IP address, subnet mask, DNS, and gateway for a static IP configuration.

Implementation Details

Sketch Explanation:

Library Inclusions: Depending on the Ethernet module chosen, the appropriate library is included. For the W5500:

#include <Ethernet.h>

Server Initialization:

EthernetServer server(LISTENPORT);

An EthernetServer object is initialized to listen on port 1000, preparing the device to handle incoming network connections.

Network Initialization in setup():

uint8_t mac[6] = {MACADDRESS};
uint8_t myIP[4] = {MYIPADDR};
Ethernet.begin(mac, myIP, myDNS, myGW, myMASK);

The network is configured with static IP settings to enhance control and manageability within the network.

Handling Incoming Connections in loop():

if (EthernetClient client = server.available()) {
  while (client.available() > 0) {
    // Code to handle client data
  }
  client.stop();
}