Add fan to enclosure [SOLVED]

[Guy Hall]

Moved from: viewtopic.php?f=8&t=151

Hi, Sorry to hijack this thread, I am trying to follow this but am struggling as I know very little about coding. I am still learning but this is beyond me

I am trying to do a very similar thing but using the ambient temp sensor as that is my controller enclosure temp and I want to control the fan that keeps the enclosure cool when it gets too hot (led drivers are also in the enclosure so it may get hot in there)

This is what I have so far but not sure if its enough

In Ferduino_with_webcontrol_beta

Code: Select all

const byte desativarFanPin = 1;   // Pino que desativa os coolers.
const byte desativarFanPinA = 7;   // Pino que desativa os coolers.

//*****************************************************************************************
//*********************** Variáveis de controle da temperatura do dissipador **************
//*****************************************************************************************
float tempH = 0;    // Temperatura do dissipador
float tempA = 0;    // Temperatura do dissipador
byte tempHR = 60;   // Temperatura para reduzir potência dos leds
byte potR = 30;     // Porcentagem a ser reduzida.

//*****************************************************************************************
//*********** Variáveis temporárias de controle da temperatura do dissipador **************
//*****************************************************************************************
float temperatura_dissipador_temp = 0; // Temperatura temporária
float temperatura_ambiente_temp = 0; // Temperatura temporária
byte tempHR_t = 0;                     // Temperatura temporária para reduzir potência dos leds
byte potR_t = 0;                       // Porcentagem temporária a ser reduzida.
boolean temperatura_alta = false;      // Sinaliza que a temperatura dos leds está alta.
boolean temperatura_baixou = false;    // Sinaliza que a temperatura dos leds esteve alta.


In tab Inicio

Code: Select all

myGLCD.setColor(0, 255, 0); 
  myGLCD.printNumF(tempH, 2, 316, 14);   // Temperatura dissipador
  myGLCD.printNumF(tempA, 2, 316, 14);   // Temperatura dissipador
  myGLCD.printNumF(tempC, 2, 302, 28);   // Temperatura da agua
  myGLCD.printNumF(PHA, 2, 327, 42);     // PH aqua
  myGLCD.printNumF(PHR, 2, 316, 56);    // PH reator
  myGLCD.printNumI(DEN, 293, 70);        // Densidade
  myGLCD.printNumI(ORP, 245, 84);       // ORP
  myGLCD.printNumF(tempA, 2, 312, 195);  // Temperatura ambiente


In leds

Code: Select all

  if((tempH >= tempHR) || (tempA >= tempHR) )
  {
    reduzir = (1 - (potR *.01));
    temperatura_alta = true;
    temperatura_baixou = false;
  }
  if(temperatura_alta == true)
  {
    if((tempH <= (tempHR - 5)) && (tempA <= (tempHR - 5))) // Se a temperatura estiver 5°C abaixo do especificado a potência volta ao valor normal.   
    {
      reduzir = 1.00;
      temperatura_alta = false;
      temperatura_baixou = true;
    }
    else
    {
      reduzir = (1 - (potR *.01));
      temperatura_baixou = false;   
    }
  }   


In parametros

Code: Select all

if(tempH < HtempMin) // Desativa os coolers se a temperatura estive abaixo da mínima definida.
  {
    digitalWrite(desativarFanPin, LOW);
  }
  else
  {
    digitalWrite(desativarFanPin, HIGH);
  }
  if(tempA < HtempMin) // Desativa os coolers se a temperatura estive abaixo da mínima definida.
  {
    digitalWrite(desativarFanPinA, LOW);
  }
  else
  {
    digitalWrite(desativarFanPinA, HIGH);
  }


Not sure if I need Fanspeed 1 & 2 or not.

Otherwise, how does this look to you

Guy

[Fernando Garcia]

Hi!

Your case is similar but different.

I don't know wich version you are using but, I'll give the code based in latest version available on Github.

Try this:

In the tab Ferduino_with_webcontrol_beta add:

Code: Select all

const byte fanPinA = 7;
const byte desativarFanPinA = free pin;

float HtempMinA = 30.5; // You can change this value.
float HtempMaxA = 40.5; // You can change this value.
int fanSpeedA = 0;

In the tab "parametros" find:

Code: Select all

 else
{
digitalWrite(desativarFanPin, HIGH);
}

Add after:

Code: Select all

 tempval = int(tempA * 10);
fanSpeedA = map(tempval, (HtempMinA * 10), (HtempMaxA * 10), 0, 255);
if (fanSpeedA < 0)
{
fanSpeedA = 0;
}
if (fanSpeedA > 255)
{
fanSpeedA = 255;
}
analogWrite(fanPinA, fanSpeedA);
if(tempA < HtempMinA)
{
digitalWrite(desativarFanPinA, LOW);
}
else
{
digitalWrite(desativarFanPinA, HIGH);
}

Best regards.

[Guy Hall]

Hi Fernando,

Thank you so much for this help, I was hoping that I was close, but no... not this time

Can I just check the following bit

Code: Select all

tempval = int(tempA * 10);


should it be

Code: Select all

int tempval = int(tempA * 10);


like it is in the below code?

Code: Select all

int tempval = int(tempH * 10);


Thanks again

[Fernando Garcia]

Hi!

Not, adding an "int" you are duplicating the variable in the function.

Try add debug messages like:

Code: Select all

Serial.println(fanSpeedA);
Serial.println(digitalRead(fanPinA));

So, you can see if the problem is on code or circuit.

Best regards.

[Guy Hall]

Ignore that, sorry. You were right of course