I2C pins.

Development Tools IDE 1.x
1

I have an UNO and the PHI-2 shield.

There are two straps I have to put in to "extend" the I2C bus onto the shield.

No worries.

Now, I have just bought an MCP 23017 I/O chip which also lives on the I2C bus.

There are two wires: SCL and SDA.

But which is which?

Sorry, but I have the "build bug" today and am trying to get this part completed soon so I can get back to the programming side, but obviously I can't do that until I get the MCP in electronically and working.

2

(blush)

I think I found them. IE: which is which.

So, all I need to do is connect them to the MCP23017's same pins and......

I have the centipede library so I hope that will work.

Here's hoping!