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Building climate control systems use a temperature sensor

to monitor and maintain their settings.

Circuit 2

Arduino Code:

Troubleshooting:

Nothing Seems to Happen

is program has no outward indication it is working. To

see the results you must open the Arduino IDE's serial

monitor (instructions on previous page).

Gibberish is Displayed

is happens because the serial monitor is receiving data at

a dierent speed than expected. To x this, click the

pull-down box that reads "*** baud" and change it to

"9600 baud".

Temperature Value is Unchanging

Try pinching the sensor with your ngers to heat it up or

pressing a bag of ice against it to cool it down.

You should be able to read the

temperature your temperature

sensor is detecting on the serial

monitor in the Arduino IDE. If it

isn't working, make sure you have

assembled the circuit correctly and

veried and uploaded the code to

your board or see the troubleshoot-

ing tips below.

Code to Note:

Real World Application:

Open Arduino IDE // File > Examples > SIK Guide > Circuit # 7

What You Should See:

Before using the serial monitor, you must call Serial.begin() to

initialize it. 9600 is the "baud rate", or communications speed. When

two devices are communicating with each other, both must be set to

the same speed.

Serial.begin(9600);

Serial.print() will print everything on the same line. Serial.println() will

move to the next line. By using both of these commands together, you

can create easy-to-read printouts of text and data.

Serial.println(degreesF);

e Serial.print() command is very smart. It can print out almost

anything you can throw at it, including variables of all types,

quoted text (AKA "strings"), etc.

See http://arduino.cc/en/serial/print for more info.

Serial.print(degreesC);

IOREF

RESET

7-15V

SCL

SDA

AREF

GND

~11

~10

3.3V

GND

VIN

POWER

ANALOG IN

DIGITAL (PWM~)

ISP