The ‘NewLCD’ library from Francisco Malpartida is my favorite library, but also that one fails in using I2C for the Attiny because it makes a call to the Wire library.ĪTtiny85 microcontroller is one of the small and high-performance AVR microcontroller, which is based on RISC CPU. h’ and that one is not compatible with the Attiny. The standard Arduino library cannot be used for I2C on the Attiny because it does a call to ‘Wire. The main features of the USI are: Two-wire Synchronous Data Transfer. The Universal Serial Interface provides the basic hardware resources needed for synchronous serial communication. ESP8266 has only 1 full hardware UART port that is used to program the chip and communicate with NodeMCU firmware. Software implementation of serial port can be unreliable and some reception errors are to be expected.

The SoftUART module offers bit-banged serial ports over GPIO pins. Digital pin 1 is the physical pin 6, and it has no analog input.ĪTtiny (also known as TinyAVR) are a subfamily of the popular 8-bit AVR microcontrollers, which typically has fewer features, fewer I/O pins, and less memory than other AVR series chips. For example, the physical pin 7 is both the digital pin 2 and the analog pin 1.

The USI module can be used to implement SPI, TWI (also known as I2C) and UART serial interfaces. Many ATtiny microprocessors don’t include a hardware UART, but do include a Universal Serial Interface, USI. Open the Arduino IDE, select the COM port of your cable and open the Serial Monitor. The next step is to monitor the serial output. With the cable attached, the ATtiny is now powered up and running.

Attiny85 serial port