Last Updated on 12 April 2022 by Suffocation
Description
This board offers a 10/100 Mbit Ethernet connection and an SD card slot. It is addressed via the SPI port and its contacts are passed through, allowing other add-on boards to be fitted to it.
Unfortunately, only one can be active at a time, either the SD card or the W5100 network chip.
The circuit board/software allows up to 4 simultaneous connections.
Applications
This board can be used, for example, to set up a web server or for network switching in home automation.
Using the circuit board, a network analysis tool can also be created that extracts information when connected to the network.
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Annexation
The circuit board is connected via SPI. On the Uno, these are pins 10, 11, 12, and 13; on the Mega, pins 50, 51, 52, and 53. The pin assignments at a glance:
| Pin | Description |
| 11,12,13 | SPI to Ethernet |
| 10 | W5100 select? |
| 4 | SS |
Programming
Library
Two libraries are needed, both are included with the Arduino GUI.
Ethernet
https://www.arduino.cc/en/Reference/Ethernet
https://github.com/BlakeFoster/Arduino-Ping
SD card
https://www.arduino.cc/en/Reference/SD
Ethernet Test
What can you do with an Ethernet shield, apart from connecting it to the network and sticking some website on it, or reading a sensor and making its value available over the network?.
SD-Test
Conclusion
Problems
Sources
https://www.arduino.cc/en/Main/ArduinoEthernetShieldV1
https://www.arduino.cc/en/Reference/Ethernet
https://www.mouser.com/catalog/specsheets/A000056_DATASHEET.pdf
https://github.com/BlakeFoster/Arduino-Ping
https://de.wikipedia.org/wiki/Namensaufl%C3%B6sung