Serial Plotter only plotting two of the six values

Using Arduino Programming Questions
1 
//int A0_Val;
float A0_Val;
//int A1_Val;
float A1_Val;
//int A2_Val;
float A2_Val;
//int A3_Val;
float A3_Val;
//int A4_Val;
float A4_Val;
//int A5_Val;
float A5_Val;

void setup() {
  // put your setup code here, to run once:
  pinMode(A0, OUTPUT);
  pinMode(A1, OUTPUT);
  pinMode(A2, OUTPUT);
  pinMode(A3, OUTPUT);
  pinMode(A4, OUTPUT);
  pinMode(A5, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(100);
  A0_Val = analogRead(A0);
  A1_Val = analogRead(A1);
  A2_Val = analogRead(A2);
  A3_Val = analogRead(A3);
  A4_Val = analogRead(A4);
  A5_Val = analogRead(A5);

  //Serial.println("New set of Data begins");
  //Serial.print("\t");
  //Serial.print("A0 value:  ");
  Serial.println(A0_Val);
  Serial.print("\t");
  //Serial.print("A1 value:  ");
  Serial.println(A1_Val);
  Serial.print("\t");
  //Serial.print("A2 value:  ");
  Serial.println(A2_Val);
  Serial.print("\t");
  //Serial.print("A3 value:  ");
  Serial.println(A3_Val);
  Serial.print("\t");
  //Serial.print("A4 value:  ");
  Serial.println(A4_Val);
  Serial.print("\t");
  //Serial.print("A5 value:  ");
  Serial.println(A5_Val);
  //Serial.print("\t");
  
  //need to set up serial plotter correctly, not displaying all variables
}

For some reason when I open the serial plotter using this code it only plots the first two values (A0 and A1). I am fairly certain it is a syntax issue that I am missing with how the serial plotter needs to be structured.

Not sure if this is useful but I'm using the Adafruit Feather M0

2

Try “,” instead of “\t”

3

Why are you setting the analogue pins to OUTPUT and then reading from them ?

4

Serial.println() ends the output to the plotter, so when you do

  Serial.println(A2_Val);

it signals the end of output

1 Like
5

Should I set them to inputs instead? Or don't set them to anything? I have no reason to set them as outputs. I'm supplying a voltage to each pin and testing them on the plotter for a test board so I figured that was considered an output. I also didn't think this would have any affect on the plotting of the data.

6

You don't need to use pinMode() at all when using analogRead()

Deal with the Serial.println() problem and you should be good to go

7

Per

...the format is:

varname1:value varname2:value varname3:value varname4:value

... if you want user-chosen variable names in the plotter. And if you want auto-generated labels in the legend:

value value value value

Per that reference, spaces, tabs, or commas as delimiters are all supposed to work.

8

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