how to merge temperature sensor code with buzzer code and PIR sensor code

I want to do a project where the temperature sensor turns on the PIR(motion) sensor when a certain ambient temperature is reached. After the PIR sensor is turned on, it should activate the buzzer when it detects motion. I don’t know how to merge the three codes to make this happen. It would be great if i could get some guidance on how to merge the codes and also set up the circuit.
Motion sensor code:


const int ledPin = 13;

int buttonState = 0;

void setup() {
pinMode(ledPin, OUTPUT);
pinMode(buttonPin, INPUT);
Serial.begin(9600);
}

void loop(){
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {
digitalWrite(ledPin, HIGH);
}
else {
digitalWrite(ledPin, LOW);
}

Serial.println(buttonState);

delay(500);
}

Temperature sensor code:
define analogPin A0 //the thermistor attach to
#define beta 4090 //the beta of the thermistor
#define resistance 10 //the value of the pull-down resistor

float sensorValue, Celsius, Fahrenheit;

void setup() {

//Define the vaults
Serial.begin(9600);
//Define pin A0 as input
pinMode(A0, INPUT);
//Define pins 10, 11, as output
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);

}
void loop() {

//read thermistor value
long a = analogRead(A0);
//the calculating formula of temperature
float tempC = beta /(log((1025.0 * 10 / a - 10) / 10) + beta / 298.0) - 273.0;
Serial.print(“Temp: “);
Serial.print(tempC);
Serial.print(” C”);
Serial.println();

//If temperature greater than 250 turn red led and buzzer on
if(tempC >= 250){

digitalWrite(11, HIGH);
digitalWrite(10, HIGH);
}

Buzzer code:
int buzzer = 13;//the pin of the active buzzer
void setup()
{
pinMode(buzzer,OUTPUT);//initialize the buzzer pin as an output
}

void loop()
{
unsigned char i;
while(1)
{
//output an frequency
for(i=0;i<80;i++)
{
digitalWrite(buzzer,HIGH);
delay(1);//wait for 1ms
digitalWrite(buzzer,LOW);
delay(1);//wait for 1ms
}
//output another frequency
for(i=0;i<100;i++)
{
digitalWrite(buzzer,HIGH);
delay(2);//wait for 2ms
digitalWrite(buzzer,LOW);
delay(2);//wait for 2ms
}
}
}

    [code]  put your code between the tags [/code]  not after the tags.

Please edit your post.

Weedpharma

I'm thinking he was going to post the other two sketches he wants to combine. He never showed back up though. Probably saw the 10 minute thing and boned out.

Delta_G: I'm thinking he was going to post the other two sketches he wants to combine. He never showed back up though. Probably saw the 10 minute thing and boned out.

That would be a real PITA in a case like that.

In the hope that @atscifair is still reading this Simple Merge Demo may be helpful. But don't try to merge all 3 programs at the same time. Merge a pair and get the merged version working. Then merge that with the 3rd program.

If you have problems post the merged version.

...R