For example, the Arduino Ethernet shield uses pin 4 to control the SPI connection to the on-board SD card, and pin 10 to control the connection to the Ethernet controller. It is, however, possible to use any pin as the Slave Select (SS) for the devices. Since this library supports only master mode, this pin should be set always as OUTPUT otherwise the SPI interface could be put automatically into slave mode by hardware, rendering the library inoperative. Note about Slave Select (SS) pin on AVR based boardsĪll AVR based boards have an SS pin that is useful when they act as a slave controlled by an external master. ![]() I would be really thankful for everybody that has some ideas to get me started here. For example PIN 53 on the MEGA has to be changed in the settings and the ICSP pins need to be used. Is there a basic, solid example how to properly connect the MEGA and Shield and test them, because I read about several issues with the MEGA and this shield. What is the easiest way to set up this communication? Or is a connection via a network always necessary? So the other device (a small SPS from Siemens) can exchange data with the Arduino, using the lib "Settimino". So I want to connect this device directly to the Arduino via Ethernet with a "physical" cable. ![]() In the end I just want to communicate with the Arduino via Ethernet from an other device. ![]() I don't want to connect the Arduino to the Internet. I recently bought a MEGA 2560 and the EthernetShield 2 with a W5500 on it. I am totally new to Arduinos so sorry for my basic knowledge.
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