Ho usato il mosfet come consigliato e riesco a far girare la ventola a comando. Grazie per il suggerimento!!!!
Ora però ho un altro problema... il codice da caricare su arduino per leggere la temperatura e umidità non funziona... ho usato questo codice: #include <Ports.h>
#include "PortsSHT21.h"
#include <Wire.h>
#include <LibHumidity.h>
//3 sensors
SHT21 hsensor1 (1);
SHT21 hsensor2 (2);
SHT21 hsensor3 (3);
float h, t;
LibHumidity humidity = LibHumidity(0);
void setup()
{
Serial.begin(9600);
Serial.println("Power On");
pinMode(16, OUTPUT);
digitalWrite(16, LOW); //GND pin
pinMode(17, OUTPUT);
digitalWrite(17, HIGH); //VCC pin
pinMode(13, OUTPUT);
}
void loop()
{
// Get data from first sensor
hsensor1.measure(SHT21::HUMI);
hsensor1.measure(SHT21::TEMP);
hsensor1.calculate(h, t);
float hum1 = (h);
float temp1 = (t);
Serial.println(temp1);
// Get data from second sensor
hsensor2.measure(SHT21::HUMI);
hsensor2.measure(SHT21::TEMP);
hsensor2.calculate(h, t);
float hum2 = (h);
float temp2 = (t);
Serial.println(temp2);
// Get data from third sensor
hsensor3.measure(SHT21::HUMI);
hsensor3.measure(SHT21::TEMP);
hsensor3.calculate(h, t);
float hum3 = (h);
float temp3 = (t);
Serial.println(temp3);
// Get data from fourth sensor
float hum4 = (humidity.GetHumidity());
float temp4 = (humidity.GetTemperatureC());
Serial.println(temp4);
}[/table]
e ho scaricato le librerie ports e portsSTH21 da GitHub - mrjonny2/PortsSHT21: Soft SHT21 libraries modified for arduino 1.0
la libreriaLibHumidity da GitHub - liquidware/LibHumidity: A humidity sensor library for Arduino
ma compliando mi da un errore: sketch_apr19a.cpp: In function 'void loop()':
sketch_apr19a:52: error: 'class LibHumidity' has no member named 'GetTemperatureC'
quacuno sa dirmi da cosa può dipendere???
Grazie in anticipo!