เซ็นเซอร์วัดความเร็วลม Anemometer / Wind Speed Sensor (4-20mA/0-5V)

JL-FS2  wind speed sensor (current/voltage type)

/*
    Wiring: VCC (Red), GND (Black), Voltage (Yellow), Current (Blue)
    Connect the voltage signal wire to Arduino analog interface:
    Yellow Cable<---->A0
*/

void setup()
{
    Serial.begin(9600);
}

void loop()
{
    int sensorValue = analogRead(A0);
    float outvoltage = sensorValue * (5.0 / 1023.0);
    Serial.print("outvoltage = ");
    Serial.print(outvoltage);
    Serial.println("V");
    int Level = 6*outvoltage;//The level of wind speed isproportional to the output voltage.
    Serial.print("wind speed is ");
    Serial.print(Level);
    Serial.println(" level now");
    Serial.println();
    delay(500);
}