Hi,

Just to be really sure. Don't forget to put pullup resistors 4k7 between [SDA --> 5V] and [SCL --> 5V].

Another thing we have seen is that adding "DEFINE I2C_SCLOUT 1" (this makes the SCL line bipolar) can help if there is a lot of noice in your set up. This is not the solution for a bad design just a way to try to get the best possible chance to communicate with the 1307.

I am sure that as soon as you get the chip to respond your learning curve will go thru the roof.