I2C AND Ethernet in one project

Projects Networking, Protocols, and Devices
1

Hi,
for a project I need an I2C interface AND Ethernet. Problem: the Ethernet shield does not have I2C and the boards that have I2C have no Ethernet. It seems both, features are mutually exclusive ...
Is there any (hardware or software) Arduino-based solution that has both?
Thanks,
Joenj

2

Could you please explain me how the ethernet shield has no I2C? I have one in front of me, and it definitely has I2C pins (pin A4 and A5).

3

I meant to say "Arduino Ethernet" (not Ethernet Shield) which does not have I2C. I guess, the only solution is to buy an Arduino Mega etc PLUS an Ethernet Shield to get both Ethernet AND I2C. I was hoping to find a solution to get I2C functionality from the "Arduino Ethernet".
Thanks. joenj

4

I meant to say "Arduino Ethernet" (not Ethernet Shield) which does not have I2C.

Are you sure? The Arduino Ethernet shows it has TWI on analog pins 4 and 5. Those are the same pins that I2C uses.

5

I don't see any problems using I2C with that board.

As SurferTim says, A4 and A5 are there. And you use those for I2C. The page linked above does not reserve those pins for any reason.

6

Hi Nick! Congrats! I see you have graduated to blue. You know what I mean. Good on ya! :slight_smile:

7

Thanks! I do know what you mean. Ah ... the hours lost! :wink:

8

Posts: 4788

Going to be another graduation coming up soon...