i2c of Atmega 328 on arduino uno not working
I2C (SDA-SCL) line needs to be pull up (place resistor on both to 5v input from master- the uno), it works with the arduino code for master-slave I2C (uno on master-severino on slave) using the code from arduino website (just be sure you set the address for the slave on the slave sketch (any number 1-126), it works for me that way, my pull up resistor is 10kohm, the same goes for my breadboard, if this is not doing the trick, maybe there's something wrong (I wouldn't know the answer to, just tried the i2c yesterday) update : on august5th (today) I just finished reading i2c's on atmel site, it is a complex one, there are several factors on why something is doing something on your twi comm, post your code, and maybe I have an answer