First of all thanks for the great work! Installing the firmware was super easy. The biggest challenge I was facing was the closure of all Baumarkts due to Covid
Now my question: in the firmware the default frequency for the measurements is 145. Is there a reason for this specific number? Should that be adjusted and if so, what would be the frequency?
We are showing the values of the last 5 minutes on our map. But sometimes a transmission may fail. So we set the interval to the half of this (150 second). And as the interval doesn’t include the time for sending the data we had to shorten this by some seconds.
Another point is the lifetime of the SDS011. If running continuously the lifetime would be around 8000 hours. The interval of around 2.5 minutes should result in a lifetime of around 5 years.
But why should this be adjusted? If we would want another measurement interval then we would have set this as the default…
Another point is the load and volume of data created on our servers. Actually we receive 13 mio. measurements per day. Decreasing the interval will result in much more measurements.
Maybe ricky-z will correct me but I think you will only miss some updates of the data on the map (there is a reload every 5 minutes), making the point disappear from time to time. If I remember well the API tries to collect all the sensor data in a timespan of 5 minutes and send the json to the map.
Yes, the sensor may disappear from the map from time to time. The map show only sensors that has sent data in the last 5 minutes.
And the graphs may may look “strange” (single points instead of a continuous line).