Getting Started with SenseCAP S2120 8-in-1 LoRaWAN Weather Sensor | Seeed Studio Wiki

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Getting Started with SenseCAP S2120 8-in-1 LoRaWAN Weather Sensor | Seeed Studio Wiki

Getting Started with SenseCAP S2120 8-in-1 LoRaWAN Weather Sensor

https://wiki.seeedstudio.com/Getting_Started_with_SenseCAP_S2120_8-in-1_LoRaWAN_Weather_Sensor/

[eerke2021]

When it says:

1. wind speed is that an instantaneous, averaged over a short term or averaged since the last transmission?
2. if it is an average: what sort of average? Eg. Mean-average, Median-average, Modal-average?
3. rain accumulation is over how long?
4. standard rain is since last interval or since another time period?

[Zeke5579]

We see that you have also sent these questions to our technical support email address and have replied to you:

Regarding your first question, the maximum gust wind speed is defined as the maximum wind speed within the specified upload interval.

For example, if the upload interval is set to 5 minutes, the gust speed is the maximum wind speed within those 5 minutes.

Regarding your second question, it is possible to use your cell phone to connect your device to the app via Bluetooth and then reset the cumulative rainfall.

Resetting the cumulative rainfall initiates the calculation process.

[eerke2021]

Thanks, but what is the meaning of the normal wind speed and rain metrics? I am guessing they are the mean-average over the last minute or something?

[Zeke5579]

The rain intensity is measured as a fixed minute-by-minute reading from the sensor, calculated using a sliding minute window. Wind speed, on the other hand, is recorded by the sensor every minute, but the reported data is determined by the user's specified reporting cycle. For example, if the reporting interval is set to 5 minutes, the wind speed reported will be the value recorded at the fourth minute. Similarly, for a 10-minute reporting interval, the wind speed reported will be the value recorded at the ninth minute.

[eerke2021]

Gotcha. If I understood correctly the rain is the mean average for the last minute before the report and the wind speed is the mean average over the penultimate minute of the set interval?

I never would have guessed the wind speed thing but I think I can make my idea of a Gust Index where I mathematically divide Interval Max Wind Gust by the Wind Minute average and send a notification (all in Node Red). In my experience damage to fences etc. is due to gusts and not wind in general.

[Zeke5579]

Is not entirely accurate.

Rainfall is not based on the average of the last minute before the report, but rather calculated continuously using the available minute-by-minute data.

The wind speed is recorded every minute, but the reported value depends on the user's specified reporting cycle. For example, if the reporting interval is set to 5 minutes, the wind speed reported will be the value recorded at the fourth minute, not the average over the penultimate minute.