Part Number: PCF8574A Other Parts Discussed in Thread: PCF8575 HI, expert, Customer have an question, Customer want to write to data by total 20bit as below. - Start bit (1bit) - Slave address (0111 + A2, A1, A0 + 0 + ACK; 8bit + ACK) - Write Data (Data (8bit) +...
If you want to write a digital value: PCF8574.digitalWrite(P1, HIGH); or: PCF8574.digitalWrite(P1, LOW); You can also use an interrupt pin: You must initialize the pin and the function to call when interrupt raised from PCF8574 // Function interrupt void keyPressedOnPCF8574(); // Set...