How to rotate a stepper motor as a function of temperature.

Projects General Guidance
1

Hey guy,

I am working on a project where I have to build and program a controller unit using a thermistor by controlling the function of the stepper motor according to a specific sensed temperature.

I know I have to use an if statement, but I don't know how to use it.

Would appreciate any help

Regards

int ThermistorPin = 0;
int Vo;
float R1 = 10000.0;
float logR2, R2, T, Tc, Tf;
float A = 0.00335401643468053;
float B = 0.000256523550896126;
float C = 2.60597012072052e-06;
float D = 6.32926126487455e-08;

void setup() {
Serial.begin(9600);
}

void loop() {
Vo = analogRead(ThermistorPin);
R2 = R1 * (1023.0 / (float)Vo - 1.0);
logR2 = log(R1/R2);
T = (1.0 / (A + BlogR2 + ClogR2logR2 + DlogR2logR2logR2));
Tc = T - 273.15;

Serial.print("Temperature: ");
Serial.print(Tc);
Serial.println(" C");
Serial.print("Vo: ");
Serial.println(Vo);
delay(500);
}

#include <Stepper.h>

const int stepsPerRevolution = 2048; // change this to fit the number of steps per revolution
const int RevolutionsPerMinute = 15; // Adjustable range of 28BYJ-48 stepper is 0~17 rpm

// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, 8, 10, 9, 11);

void setup() {
myStepper.setSpeed(RevolutionsPerMinute);
// initialize the serial port:
Serial.begin(9600);
}

void loop() {
// step one revolution in one direction:
Serial.println("clockwise");
myStepper.step(stepsPerRevolution);
delay(500);

// step one revolution in the other direction:
Serial.println("counterclockwise");
myStepper.step(-stepsPerRevolution);
delay(500);
}

2 
int ThermistorPin = 0;

Pin 0 is reserved for serial comms, and it has no analog input capability. Did you mean, 'A0'?

You can not have two setup() and two loop() functions in the same sketch.

3

What do you want the stepper to do, and at what temperatures?

Note: analogRead(0) does work, and reads analog pin A0. Very poor decision by the Arduino designers.