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// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 115200 bits per second:
Serial.begin(115200);
}
void loop() {
Testsmaplerate(); // For knowing sample rate
}

void Testsmaplerate()
{
int i;
float voltage;
int sensorValue;
unsigned long elsp=millis();
for (i=0;i<1000000;i++)
{
// read the input on analog pin 0:
sensorValue = analogRead(A0);
}
Serial.println(millis()-elsp);
}