Testing All Available Output Pinout Single PCF8574T GPIO Expander IC I2C SCL SDA with Arduino UNO

Arduino project testing ic address and all available output pinout Single PCF8574/PCF8574T 8 Bit parallel digital GPIO Extender/#expansion/#expander IC using #i2c the two wire interface communication protocol Serial Data (SDA) and Serial Clock (SCL) with Arduino UNO