How do I add additional sensors?

Projects Programming
19

Look at these lines, which PaulS already suggested you examine...

sensorPinValue = analogRead(sensorPin1);
sensorPinValue = analogRead(sensorPin2);
Serial.print("Value from 1:");
Serial.println(analogRead(1));
Serial.print("Value from 2:");
Serial.println(analogRead(2));
sensorPinValue = analogRead(sensorPin3);
sensorPinValue = analogRead(sensorPin4);
sensorPinValue = analogRead(sensorPin5);

You have only one variable, sensorPinValue, but you do analogRead() from 5 different pins. So as soon as you store sensorPin1's reading in sensorPinValue, you immediately overwrite that with the reading from sensorPin2; and so on until the only value you have stored is the last one in the list, ie sensorPin5.

You need a few more variables, perhaps sensorPinValue1, sensorPinValue2 etc.