serialesensore

introduction

Very important to know values detected by a sensor. Arduino

It can be used to verify if it works, how it works, which values returns

The yellow LED on pin 13 is set by default. There is in fact one little LED connected to pin 13. We should use it then! Here, in this example, just to indicate the moment in which the brightness is detected by the sensor.

click here to open the serial monitor of the Arduino IDE. Arduino

program

apri il programma

Arduino

inizia il laboratorio

algorithm

attrezzaggio

pinA0

_generic_sensor

pin13

_led_13

variabili

_value = 0

previous_value = 0

ciclo

annotation: write the value of a sensor on the serial port

the variable _value is equal to... read the sensor: _generic_sensor

IF HAPPENS THAT _value is not equal to previous_value

write on the serial: valore_del_sensore_--> _value

the variable previous_value is equal to _value

SWITCH ON (5 Volt) switch on

_led_13

wait 500 milliseconds

SWITCH OFF (0 Volt) switch off

_led_13

wait 500 milliseconds

Arduino code

//programma: serialesensore

//******* pin ********

//******* declare ******** 
const int pin_generic_sensor=A0;//pin sensorgenericosensore
int _value=0;//declares the variable 
int previous_value=0;//declares the variable 
const int pin_led_13=13;//pin of _led_13

//********** setup **********  
   void setup(){ 
	
	pinMode(pin_generic_sensor,INPUT); 
	pinMode(pin_led_13,OUTPUT);  
	 Serial.begin(9600);      // Initialize the serial  
}

//********** loop ********** 
 void loop() { 
	
	// write_the_value_of_a_sensor_on_the_serial_port
	_value=analogRead(pin_generic_sensor); // reads the sensor _generic_sensor
	if(_value!=previous_value){ 
	Serial.print("valore_del_sensore_-->");//writes on the serial 
	Serial.print(_value);//writes on the serial 
	previous_value=_value; 
		} 
	digitalWrite(pin_led_13,HIGH); // HIGH/LOW is the voltage 5V/0V)
	delay(500);//attendi 
	digitalWrite(pin_led_13,LOW); // HIGH/LOW is the voltage 5V/0V)
	delay(500);//attendi

};//end loop

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