Arduino Ethernet "Coloured" Header Question

Projects Networking, Protocols, and Devices
1

What do these headers on the Arduino Ethernet shield perform?

Screenshot 2022-09-23 172637
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2

From https://www.arduino.cc/en/uploads/Main/arduino-Ethernet-Shield2-V2-sch.pdf

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3

Yes, I have the schematic already. But whats the point of them? They are jumpers, quite obviously, but what does selecting different things do?

4

They are not jumpers, they are connectors designed to take a polarised plug

Basically they connect to pins on the Arduino

5

Oh right. I thought they had to be jumpers. But why have them? What do they connect to (apart from the Arduino)? Or do they connect two Arduinos to the one Ethernet port? Like what is the point of them? How do they get used? Why are they there? Can I snip them off, or remove them completely without bad things happening?

6

They make it easy to connect to some of the Arduino pins using a polarised plug which makes it difficult to connect them wrongly. The two blue connectors are I2C connections and allow devices to be plugged in securely

They are connectors to Arduino pins. They do not allow 2 Arduinos to share the Ethernet port. You are overthinking this. You might just as well as why the Uno has a row of sockets along each edge

Why would you want to or need to cut them off ?

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7

Aha. Thank you. I see how they are used now.

Errrrrr... I don't need to ask that because I know what they do. :+1::grin: However, I had no context for what those were for. They could have been anything for all I knew. Connections to an analogue pin (for example) with 5v and Gnd on either side could be jumpers, maybe some way of changing how the Ethernet chip works?

Now that I know, my question is answered! Thank you! :+1::ok_hand:

I don't want to. I was trying to determine if they were to do with making the Ethernet work, or if they were something else.

I personally have this one:

It's great, but I haven't got the Ethernet working yet. But that's another story again. :grin:
The SD card works though!

8

those are TimkerKit system connectors. the TimkerKit project is abandoned. It was developed by Arduino. later Arduino partially adopted the Seeedstudio Grove system

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