How to change name of Y axis in the Serial plotter

[drg7]

Please may I know how to change the name of the Y axis in the Serial plotter?

At present it says Value1. I want to rename the Y axis to say Voltage.

Thank you.

[ledsyn]

In your sketch, insert Serial.print ( "Voltage " ); before the Serial.print with the value

[drg7]

ledsyn, thank you. I appreciate your patience with a newbie.

[drg7]

@ledsyn

Serial.print ( "Voltage " ); before the Serial.print with the value

I am sorry, now I am getting two value texts. The blue check mark does not read anything. Also the text "voltage" does not appear.

/*
  ReadAnalogVoltage
  Center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
 modified by yours truly Dr. G
*/
// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1050.0);
  // print out the value of the potentiometer as an interger only:

float pi = 3.14;
int value = (int)pi;
Serial.print("voltage= ");
Serial.println(voltage,0);

  delay(200);  // delay in between reads for stability
}

[ptillisch]

Hi @drg7. Keep in mind that Serial Plotter is a machine, not a human. Your sketch must produce serial output in a specific format in order for it to be correctly recognized by Serial Plotter.

The format is:

<label>:<value>

where <label> is the text for the variable's label and <value> is the value of the variable.

So you must change your code to this:

Serial.print("voltage:");
Serial.println(voltage,0);

[drg7]

ptillisch, thank you. It works, beautifully. I so very much appreciate your help. I've been "fighting" this for a while. The last I read was

Serial.println("Voltage" + sensorValue);

and that was completely wrong.

From your corrected sketch

/*
  ReadAnalogVoltage
  Center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
 modified by yours truly, Dr. G
*/
// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1050.0);
  // print out the value of the potentiometer as an interger only:

float pi = 3.14;
int value = (int)pi;
Serial.print("voltage:");
Serial.println(voltage,0);
  delay(200);  // delay in between reads for stability
}