Boa noite,
Continuando minhas aventuras com o Arduino e sensores. Hoje decidi brincar com o Sensor Ultrasonico HC-SR04 para medir distancia.
O funcionamento do mesmo é realmente simples, ele possui 4 pinos, VCC para alimentação, Trig para iniciar uma medida, Echo para retorno da distância e GND terra.
O mesmo possui uma biblioteca pronta para fazer as medidas e tudo mais. A mesma se chama Ultrasonic. O unico problema que tive com a mesma é que ela estava desatualizada e ainda utilizava o WProgram.h enquanto o Arduino 1.0.1 utiliza Arduino.h, atulizei a mesma e executei sem problemas.
A mesma deve ser incluida no seu diretório “arduino-1.0.1/libraries” e você deve fechar e abrir a IDE.
Sensor VCC conecta ao Arduino +5V pino
Sensor Trig conecta ao Arduino PINO 12
Sensor Echo conecta ao Arduino PINO 13
Sensor GND conecta ao Arduino GND
Você pode configurar os pinos nas variáveis trig e echo.
[code lang=”c”]
#include “Ultrasonic.h”
int trig = 12;
int echo = 13;
Ultrasonic ultrasonic(trig,echo);
void setup() {
Serial.begin(9600);
}
void loop()
{
Serial.print(“Distance CM:”);
Serial.println(ultrasonic.Ranging(CM));
Serial.print(“Distance INC:”);
Serial.println(ultrasonic.Ranging(INC));
delay(100);
}
[/code]
Referências:
HC-SR04 DataSheet
Biblioteca Ultrasonic atualizada para Arduino 1.0.1
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