void setup() { // put your setup code here, to run once: pinMode(A12, OUTPUT); pinMode(A13, OUTPUT); pinMode(A14, OUTPUT); pinMode(A15, OUTPUT); digitalWrite(A2, HIGH); digitalWrite(A13, HIGH); digitalWrite(A14, HIGH); digitalWrite(A15, HIGH); pinMode(A0, INPUT); pinMode(A1, INPUT); pinMode(A2, INPUT); pinMode(A3, INPUT); pinMode(A4, INPUT); pinMode(A5, INPUT); pinMode(A6, INPUT); pinMode(A7, INPUT); Serial.begin(9600); } void loop() { delay(1000); digitalWrite(A12, HIGH); digitalWrite(A13, HIGH); digitalWrite(A14, HIGH); digitalWrite(A15, HIGH); //delay(1); digitalWrite(A12, HIGH); digitalWrite(A13, LOW); digitalWrite(A14, LOW); digitalWrite(A15, LOW); delay(1); Serial.write("COL A-2\n"); for(int i = 0; i < 8; i++){ if(digitalRead(A0+i) == LOW){ Serial.write("1"); } else{ Serial.write("0"); } } Serial.write("\n"); }