There needs to be a third wire which is just the ground (0V). There may also be a 5Volt wire distributing power to the devices. I will try to shed some light on the I2C bus in a forthcoming chapter.

Almost all AVR ATmega family microcontrollers have ability to be programmed with bootloader. Bootloaders can be various sizes and can use different algorithms and interfaces (I2C, USART, SPI, USB…) ...

There are a few different ways of getting firmware onto one of AVR’s ATtiny85 microcontrollers, including bootloaders that allow for firmware to be updated without the need to plug the chip i… ...

Electronic hobbyist Jin Zhu based in San Francisco has started a Kickstarter campaign to create a new elegant TWI/I2C library for AVR Mega series MCU, which is available from just $5 and is ...