adtl / neteeprom

A generic fork of https://github.com/gregington/NetEEPROM to use with Ethercard and ENC28J60

NetEEPROM

Arduino library that reads stores network settings to EEPROM. Forked from https://github.com/gregington/NetEEPROM.

This library stores to EEPROM:

• the MAC address of the interface
• whether DHCP should be used to configure IP settings
• if DHCP is not used, then the manual IP settings for the interface

The library only stores the network configuration, and it can be used in combination with ethercard or another library for network configuration. If network configuration has not been stored in EEPROM then the following configuration will apply:

• A random MAC address in the form DE:AD:BE:xx:xx:xx (where xx is a random number between 0 and 255) will be generated and stored in EEPROM.
• The static IP address 192.168.1.200/24 will be configured and this configuration will be stored in EEPROM

Usage

To use the the NetEEPROM library the sketch will need to contain the following includes:

#include <EEPROM.h>
#include <NetEEPROM.h>

To set a MAC address with DHCP configuration, use the following code:

byte mac[6] = { 0xCA, 0xFE, 0xBA, 0xBE, 0x00, 0x00 };
NetEeprom.writeDhcpConfig(mac);

To set a MAC address with manual IP configuration, use the following code:

byte mac[6] = { 0xCA, 0xFE, 0xBA, 0xBE, 0x00, 0x00 };
byte ip[4] = { 192, 168, 1, 100 };
byte dns[4] = { 8, 8, 8, 8 };
byte gw[4] = { 192, 168, 1, 1 };
byte subnet[4] = { 255, 255, 255, 0 };
NetEeprom.writeManualConfig(mac, ip, dns, gw, subnet);

To set up an ENC28J60 Ethernet adapter using EtherCard with configuration from EEPROM, use the following lines:

byte mymac[6];
// init will read the mac address stored in EEPROM
// and store it in mymac array.
NetEeprom.init(mymac);
while (ether.begin(sizeof Ethernet::buffer, mymac, CHIP_SELECT_PIN) == 0)
{
    Serial.println( "Failed to access Ethernet controller");
    delay(5000);
}

// If the stored configuration is using dhcp
// then run ether.dhcpSetup()
if (NetEeprom.isDhcp())
{
    Serial.println("Try DHCP");
    if (!ether.dhcpSetup())
        Serial.println( "DHCP failed");
}
else
{
    // Else, configure the static IP
    byte myip[4];
    byte gwip[4];
    byte dnsip[4];
    byte netmask[4];
    Serial.println("Static IP");
    NetEeprom.readIp(myip);
    NetEeprom.readGateway(gwip);
    NetEeprom.readDns(dnsip);
    NetEeprom.readSubnet(netmask);
    ether.staticSetup(myip, gwip, dnsip, netmask);
}