Salve a tutti,
questo sarebbe uno sketch trovato in rete che fa al caso mio solo che la misurazione della temperatura viene fatta con un modulo maxim digitale mentre io vorrei che venisse fatto con modulo MAX6675, qualcuno potrebbe aiutarmi? Con il software sono un neofita...
Grazie
Luca
questo è il codice:
#include <PID_v1.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Servo.h>
// Data wire is plugged into pin 2 on the Arduino
#define ONE_WIRE_BUS 2
// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
//Define Variables we'll be connecting to
double Setpoint, Input, Output;
Servo myservo;
float tempUpper;
float tempLower;
float avgTemp1;
//Specify the links and initial tuning parameters
PID myPID(&Input, &Output, &Setpoint,2,5,1, DIRECT); //these tuning parameters NEED to be updated for 5gal brew
DeviceAddress upperThermometer = { 0x28, 0x4C, 0xB6, 0x9A, 0x04, 0x00, 0x00, 0xA1 };
DeviceAddress lowerThermometer = { 0x28, 0x3F, 0xF2, 0x9A, 0x04, 0x00, 0x00, 0x96 };
void setup ()
{
//Input = avgTemp1(0);
Setpoint = 160; //temperature to set to in degrees F
myPID.SetMode(AUTOMATIC);
//myPID.SetOutputLimits(10, 95);//10 and 95 are the max and min servo angle positions
myPID.SetOutputLimits(650, 1520);//650 and 1520 are the write microseconds limits
myPID.SetSampleTime(2000);
Serial.begin(9600);
myservo.attach(8); //the pin for the servo control
myservo.write(60); //set initial servo position if desired
//Serial.println("PID to servo control angle"); // so I can keep track of what is loaded
Serial.println("Time, Set Point, Upper Temp, Lower Temp, Avg Temp, Output Angle"); //headers for CSV table output
sensors.begin();
// set the resolution to 10 bit (good enough?), going to 12 for greater precision
sensors.setResolution(upperThermometer, 12);
sensors.setResolution(lowerThermometer, 12);
}
void loop (void)
{
delay(2000);
// Serial.print("Time is: "); comment out if using excel
Serial.print(millis());Serial.print(", ");
//Serial.print("Setpoint: ");
Serial.print(Setpoint); Serial.print(", ");
//Serial.println("Getting temperatures...");
//Temperature sensor section
sensors.requestTemperatures();
tempUpper = sensors.getTempF(upperThermometer); //Use sensors.getTempC if you prefer your systems metric
tempLower = sensors.getTempF(lowerThermometer);
avgTemp1 = (tempUpper+tempLower)/2;
//Serial.print("upper temperature is: ");
Serial.print(tempUpper);Serial.print(", ");
// Serial.print("lower temperature is: ");
Serial.print(tempLower);Serial.print(", ");
// Serial.print("avg pot temperature is: ");
Serial.print(avgTemp1); Serial.print(", ");
//PID section
Input = avgTemp1;
myPID.Compute();
//Servo section
//int invOutput = map(Output, 10, 95, 95, 10); //need to map 10 to 95 to reverse the output from the PID
// Since 10 is max value on the gas and 95 is min
int invOutput = map(Output, 650, 1520, 1520, 650);
//Serial.print("writing angle: ");
Serial.println(Output);
//myservo.write(invOutput);
myservo.writeMicroseconds(invOutput);
}
