title: barometer for loop adding in 3rd time
body: <p>hi i have barometer MS5611 an i have problems to making an average number</p>
  
  <p>for beginning i trying to making sum with 100 numbers but some how i get feed-beak wrong some how it add my answer only in the 3rd time</p>
  
  <pre><code>for (int i = 0; i &lt; 100; i++) {
        pression += barometer.getPressure(MS561101BA_OSR_4096);
        Serial.println(pression);
        delay(20);
  </code></pre>
  
  <p>my output</p>
  
  <pre><code>0.00
  0.00
  0.00
  0.00
  973.84
  973.84
  973.84
  1947.69
  1947.69
  1947.69
  2921.57
  2921.57
  2921.57
  </code></pre>