Ethernet driver for lwIP on esp8266

This library brings full ethernet (RJ45 cables) connectivity into an already existing lwIP stack, such as the one in esp8266.

Every network services will work without further work

• dhcp (client only for now)
• dns
• http(s) clients+servers
• mqtt
• ... your already working network services
• no need for separate UDP/TCP api (like uIP or others, lwIP is already here)

This library needs

• W5500 ethernet-only driver https://github.com/d-a-v/W5500MacRaw (which is a fork from https://github.com/njh/W5500MacRaw, PR is pending)

How to use

• esp8266/arduino (with lwip2)
• declare Wiznet5500lwIP ether(CSPIN)
• call ether.begin() in arduino's setup()
• call ether.loop() in arduino's loop()

As for now, the network interface is working as DHCP client only

What's next

• allow dhcp server
• provide better network helpers (like arduino's WiFi.status())
• enc28j60 similar driver

Help needed

Tested only with w5500, not on other w5x00 chips

Notes (esp8266 and w5500)

• the TCP/IP part of W5x00 chips is not used, the ethernet interface only is.
• Do not directly connect SPI CS(ChipSelect) to esp8266'SS(SlaveSelect) (GPIO15), use another pin (hacks using a transistor exist for using this pin).

Notes

• This arduino library is not specific to esp8266, it can work with other uC working with lwIP