turning a temperature sensor on and off every thirty minutes

Using Arduino Programming Questions
1

Hello! I am very new to the arduino coding world...I'm trying to code a temperature sensor to come on every thirty minutes, take the temperature 5 times and average it. I've read a lot about the millis function vs delay. I'm just not sure how to code it.

Could anyone share some example code of how to do this??

Thanks!

2

Start with the blink without delay example. Put your temperature code in place of the code that manipulates the LED.

3

annachaffee:
Hello! I am very new to the arduino coding world...I'm trying to code a temperature sensor to come on every thirty minutes, take the temperature 5 times and average it. I've read a lot about the millis function vs delay. I'm just not sure how to code it.

Could anyone share some example code of how to do this??

const unsigned long MillisecondsPerSecond = 1000UL;
const unsigned long SecondsPerMinute = 60UL;
const unsigned long ThirtyMinutes = 30UL * SecondsPerMinute * MillisecondsPerSecond;
unsigned long StartMillis = 0;
void setup()
{
}

void loop()
{
    if (mills() - StartMillis >= ThirtyMinutes)
    {
        StartMillis += ThirtyMinutes;
        // Average five temperature readings
        float averageTemperature = 0;
        for (byte i=0; i<5; i++)
        {
            averageTemperture += getTemperature();
        }
        averageTemperature /= 5.0;
    }
}