//DIGITAL_READ(2, A4, 4); //Not avaliable on Arduino Uno, i2c pin. //DIGITAL_READ(2, A5, 8); //Not avaliable on Arduino Uno, i2c pin.

REV D - June 2022 The I2C IO expander MCP23017 has changed according to the new data sheet. It is now a 14/16-bit IO expander. The pins GPA7 (7) and GPB7 (15) have lost their input mode, output mode ...

Assume that you are moving towards a complex microcontroller project bundled with blinkers, beepers, and a display panel. To link a standard 16×2 LCD directly with the microcontroller, for instance ...

There are times when you don’t need much processing power for your project but you do need a lot of I/O pins. It often doesn’t make economic sense to choose a larger microcontroller just to get extra ...

This articles describes how you can use I2C (TWI) communication, Arduino and temperature sensors to measure 3 different temperatures. It can be very helpful when you want to measure the outside, ...