I'm not an expert in the Arduino environment.
I've realized my own, small project on an Arduino Leonardo. After all went well, I decided to "migrate" the code to an ATtiny85, because the Leonardo is somehow an overkill for my small project.
I programmed the ATtiny85 within der Arduino IDE an all went well. But I realized, that I cannot debugging on the ATtiny85 using the Serial Monitor to observe data and get some variables.
So I dealt with I2C or TWI respectively and found many hints and tips within and outside this forum, e.g. this one.
But I'm still slightly confused how to start the right way; how can I establish a communication with I2C / TWI between my ATtiny85 and my Arduino Uno or Leonardo respectively (only during development an for debugging purposes)?
Hope my question is not very silly... :confused: