Hi, I said I would make a new post for the software of the robot (advised by mehtaatur).

I've began testing my switch matrix and Ive been having a bit of a problem. On the serial monitor I get rows of 8 1's (11111111). And when I put the magnets close some of the 1's turn to 0's. But it does not happen to all of them. I'm not sure if maybe some of my wiring is wrong or maybe some of my switches could be broken?

This is the program I am using.
_______________________________________________________________________________________________________________________________________________________
void setup() {

Serial.begin(9600);
}

void loop() {
Serial.println("Reed Switch Array: \n");
int ColumnDetect[9] = {A5, A4, A3, A2, A1, A0, 11, 10}; //Array with the 8 detection pins in sequence from left to right in diagram
for (int i=2; i { // connect to pins 2, 3, 4, 5 , 6, 7, 8, 9 here - VCC
digitalWrite(i, HIGH);

for (int j=0; j { // connect to pins in ColumnDetect array in order - Reads signal from here
Serial.print(digitalRead(ColumnDetect[j]));
}

digitalWrite(i, LOW);
Serial.println();
}

Serial.println("\nEND \n");
}

My Internet is not working on my laptop tonight so when I get it back I will upload more detailed photos.