So I'm using Arduino to make a fan that is controlled by a temperature sensor. When the temperature sensor reads above 72 degrees F, the fan turns clockwise. If the temperature sensor reads below 72 degrees, the fan turns counterclockwise. So I've already run the temperature sensor experiment and the servo motor experiment separately on the Spark Fun guide. I thought that maybe I could plug in both into the breadboard and mesh the codes in a way. I have everything meshed code wise, BUT at the end of the servo code, the comments tell you how to control the servo motor even more. I was wondering if anyone knew how to write the code, where the temperature sensor controls the servo. This is the code I have so far:
const int temperaturePin = 0;
#include <Servo.h> //servo library
Servo servo1; //servo control object
int potpin = A1;
int potvalue = 0;
void setup()
{
// We use the Serial.begin() function to initialize the port
// and set the communications speed.
// The speed is measured in bits per second, also known as
// "baud rate". 9600 is a very commonly used baud rate,
// and will transfer about 10 characters per second.
Serial.begin(9600);
servo1.attach(9); //attaching the servo to digital pin 9
}
void loop()
{
// Up to now we've only used integer ("int") values in our
// sketches. Integers are always whole numbers (0, 1, 23, etc.).
// In this sketch, we'll use floating-point values ("float").
// Floats can be fractional numbers such as 1.42, 2523.43121, etc.
// We'll declare three floating-point variables
// (We can declare multiple variables of the same type on one line:)
float voltage, degreesC, degreesF;
// First we'll measure the voltage at the analog pin. Normally
// we'd use analogRead(), which returns a number from 0 to 1023.
// Here we've written a function (further down) called
// getVoltage() that returns the true voltage (0 to 5 Volts)
// present on an analog input pin.
voltage = getVoltage(temperaturePin);
// Now we'll convert the voltage to degrees Celsius.
// This formula comes from the temperature sensor datasheet:
degreesC = (voltage - 0.5) * 100.0;
// While we're at it, let's convert degrees Celsius to Fahrenheit.
// This is the classic C to F conversion formula:
degreesF = degreesC * (9.0/5.0) + 32.0;
// Now we'll use the serial port to print these values
// to the serial monitor!
// To open the serial monitor window, upload your code,
// then click the "magnifying glass" button at the right edge
// of the Arduino IDE toolbar. The serial monitor window
// will open.
// (NOTE: remember we said that the communication speed
// must be the same on both sides. Ensure that the baud rate
// control at the bottom of the window is set to 9600. If it
// isn't, change it to 9600.)
// Also note that every time you upload a new sketch to the
// Arduino, the serial monitor window will close. It does this
// because the serial port is also used to upload code!
// When the upload is complete, you can re-open the serial
// monitor window.
// To send data from the Arduino to the serial monitor window,
// we use the Serial.print() function. You can print variables
// or text (within quotes).
Serial.print("voltage: ");
Serial.print(voltage);
Serial.print(" deg C: ");
Serial.print(degreesC);
Serial.print(" deg F: ");
Serial.println(degreesF);
// These statements will print lines of data like this:
// "voltage: 0.73 deg C: 22.75 deg F: 72.96"
// Note that all of the above statements are "print", except
// for the last one, which is "println". "Print" will output
// text to the SAME LINE, similar to building a sentence
// out of words. "Println" will insert a "carriage return"
// character at the end of whatever it prints, moving down
// to the NEXT line.
delay(1000); // repeat once per second (change as you wish!)
int position;
potvalue = analogRead(potpin);
potvalue = map(potvalue,0,1023,0,180);
potvalue = constrain(potvalue,0,180);
Serial.println("Servo degree of rotation");
Serial.println(potvalue);
servo1.write(potvalue);
if
}
float getVoltage(int pin)
{
// This function has one input parameter, the analog pin number
// to read. You might notice that this function does not have
// "void" in front of it; this is because it returns a floating-
// point value, which is the true voltage on that pin (0 to 5V).
// You can write your own functions that take in parameters
// and return values. Here's how:
// To take in parameters, put their type and name in the
// parenthesis after the function name (see above). You can
// have multiple parameters, separated with commas.
// To return a value, put the type BEFORE the function name
// (see "float", above), and use a return() statement in your code
// to actually return the value (see below).
// If you don't need to get any parameters, you can just put
// "()" after the function name.
// If you don't need to return a value, just write "void" before
// the function name.
// Here's the return statement for this function. We're doing
// all the math we need to do within this statement:
return (analogRead(pin) * 0.004882814);
// This equation converts the 0 to 1023 value that analogRead()
// returns, into a 0.0 to 5.0 value that is the true voltage
// being read at that pin.
}
// Other things to try with this code:
// Turn on an LED if the temperature is above or below a value.
// Read that threshold value from a potentiometer - now you've
// created a thermostat!
I pasted the temperature sensor code from ( https://learn.sparkfun.com/tutorials/sik-experiment-guide-for-arduino---v32/all ) and just added most of the servo code. If anyone knows how to do this, please help! Thanks!
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