ethernet cable to mbed

16 Feb 2013

hi guys Ive just started with the mbed and im fully overwellmed how good this thing works. Now I want to connect the mbed with my notebook via network.

I cut a network cable. despite my expectations i dont have the usual pattern of the colored and striped wires. My cable has the colors:

-grey (1) -green -red -blue -white -orange -yellow -brows (8)

I put that uncut cable part into a rj45 connector and meassured the connection with the corresponding pins.

Which one of them are TX+ TX- and RX+ RX-

Would you be so kind and help me. The connector I used to check the wires is a CAT6 connector but which one of them are the pins i need to connect with the mbed i dont know either.

As you guys can see Im not that aware with the networking stuff. So please be kind.

Thank you very much for your attention

gangBen

17 Feb 2013

Hi. I connect RD+ to green, RD- to green/white, TD+ to orange and TD- to orange/white. Hope can help you.

18 Feb 2013

Hong Hong wrote:

Hi. I connect RD+ to green, RD- to green/white, TD+ to orange and TD- to orange/white. Hope can help you.

Just use the wiring for one of the two standards (non-crossover) on both ends of the cable. You'll be OK. I think 568B is more widely used.

http://www.vpi.us/standard.html

18 Feb 2013

Benjamin,

Do you know that you cannot connect the wires directly to the mbed? You need a transformer+socket ("magnetics") assembly, or at least 4 capacitors between the mbed pins and the network. This has been discussed before, so you can search the forums for the information you need. The prior discussions include the pin-number/position/signal information you asked about, too.

18 Feb 2013

This is convenient for Ethernet to RJ45 jack, and for other utilities:

I have one.. works well. http://www.coolcomponents.co.uk/catalog/mbed-lpc1768-workshop-development-board-p-608.html