How to connect your Arduino UNO/Nano to internet using the W5100 Ethernet Module?
Arduino Ethernet Rev3 without PoE | Arduino Documentation
Arduino Ethernet Library 2.0.0
Pushing Data to Data.SparkFun.com - SparkFun Learn
Amazon.com: DEVMO W5100 Ethernet Network Shield LAN for Ar-duino Expansion Board Module with SD Card Slot Compatible with Ar-duino UNO MEGA2560 UNO R3 ATMega 328 MEGA 1280 : Electronics
Monitoring and control over the web with 2 Arduino and Ether - Hackster.io