How to convert integer values into strings in this case?

Projects Programming
1

Hi Guys,
I want to display on my serial monitor a string values based on the integer values that i've got in my code.

Here is my code:

int dustPin = A0;
int ledPin = D2;    
 
float voltsMeasured = 0;
float calcVoltage = 0;
float dustDensity = 0;
 
void setup()
{
  Serial.begin(57600);
  pinMode(ledPin,OUTPUT);
}
 
 
void loop()
{
  digitalWrite(ledPin,LOW); // power on the LED
  delayMicroseconds(280);
 
  voltsMeasured = analogRead(dustPin); // read the dust value
 
  delayMicroseconds(40);
  digitalWrite(ledPin,HIGH); // turn the LED off
  delayMicroseconds(9680);
 
  //measure your 5v and change below
  calcVoltage = voltsMeasured * (3.3 / 1024.0);
  dustDensity = 0.17 * calcVoltage - 0.1;
  Serial.println("GP2Y1010AU0F readings"); 
  Serial.print("Raw Signal Value = ");
  Serial.println(voltsMeasured); 
  Serial.print("Voltage = ");
  Serial.println(calcVoltage);
  Serial.print("Dust Density = ");
  Serial.println(dustDensity); // mg/m3
  Serial.println("");
  delay(1000);
}

What i want to display on the serial monitor:

  1. When the value is below 0.14 --> Lower Dust Level
  2. When the value is 0.14 or higher --> Normal Dust Level
  3. When the value is above than 0.20 --> Need to clean solar panel

So what is the best practice that i can use to have this result displaying on my serial monitor?

2

You want a simple, easy way? Jut place the text prints in 'if' statements that test the values. You can translate directly from your requirement:

//When the value is below 0.14 --> Lower Dust Level
if (value < 0.14) {
Serial.println("Lower Dust Level");
}
else
{...
3

I don’t understand the strings reference. Do you not just need to compare the dust density variable against your level limits and do an if else statement

If < low level
Print low dust
Else if < high level
Print normal
Else
Print clean panel

4

Best practices are always context dependant. So what are your design goals? Maintainability? Scaleability? Memory conservation? Etc. etc...

5

No conversion is needed here. You can directly apply the method shown in post#2.

6

Here is one way (to expand on what others have posted).

float dustValue = .18;

void setup()
{
   Serial.begin(115200);
   if (dustValue < 0.14)
   {
      Serial.println("Lower dust level");
   }
   else if (dustValue >= 0.14 && dustValue < 0.20)
   {
      Serial.println("Normal dust level");
   }
   else if (dustValue >= 0.20)
   {
      Serial.println("Need to clean solar panel");
   }
}

void loop()
{

}
7

`Do you need the comparator in the middle since it must be >= 0.14 to pass the first if

float dustValue = .18;

void setup()
{
   Serial.begin(115200);
   if (dustValue < 0.14)
   {
      Serial.println("Lower dust level");
   }
   else if (dustValue < 0.20)
   {
      Serial.println("Normal dust level");
   }
   else 
   {
      Serial.println("Need to clean solar panel");
   }
}

void loop()
{

}
8

Good point.

9

and, its a monitor, so he needs to be in loop(), not setup. I assume that was a clerical error? Just wanted to clarify, op seems green, might confuse them.

what I dont understand is, the original code the op posted seems to demonstrate they know how to do what they asked how to do...weird.

so @abddi_16 : whats the actual problems you're running into? Were you just not familiar with if() statements?

11

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