meteohub.de

Hello
I have only one ISS VP2 and a MB Pro, MB Nano (in Davis Console).

The Meteobridge Pro reads all data correctly except of the humidity (always ~47%) - that's to low (the dew point too).
I have restartet, rebuild database and calibrate on both MBs the Humidity Sensor (offset = 0, factor = 1).
Any idea how to fix it?

LG Hans

What does the Davis Console say? Assuming there is one to rule out a faulty sensor.

Guy

In your case the humidity is directly read from the ISS via RF. I never have been reported that there is an error on that. What does your console tell for outdoor humidity?

admin wrote: ↑Sun Aug 11, 2024 11:20 am In your case the humidity is directly read from the ISS via RF. I never have been reported that there is an error on that. What does your console tell for outdoor humidity?

The Davis Console and the built in MB Nano SD are reporting the same correct humidity (This must necessarily be the case).

The Meteobridge Pro receives from the same "Radio" data from the same ISS station but with wrong humidity. All other measurements are exactly the same with the Davis console.

Both systems are also connected to an additional Sensor station Davis "6331" with temp and hum sensor. The measurement for humidity are on MB Nano and MB Pro the same and correct.

Hans

Is it an old non-digital sensor?

Confirm connections are

ISS -> Davis Console + MB Nano Correct humidity
ISS -> MBPro Incorrect humidity only

Davis 6331 (Temp/Humidity sensors only) -> Console/Nano Correct humidity
Davis 6331 (Temp/Humidity sensors only) -> MBPro Correct humidity

Are both the Console/Nano and MBPro reading the ISS & 6331 directly? Re-transmit is not being used?

NANO reads data from console, MB PRO reads RF data directly from sensors.
There are older Davis sensors for temp/hum which do not report measurements digitally, but in an analogue style where a value conversion is needed. These are very rare today. Do you have such a legacy sensor connected to your 6331 which has the humidity reading difference?

Do you think it is worth to exchange the ISS temp/hum sensor with the one which is connected to 6331?
Another idea: exchange 6331 unit with ISS RF 7345.952 unit (maybe this is impossible)?

YES, I am rather sure this will fix it.

I applied now this workaround:

Multiplied by "1.456" I get same "MB pro humidity" as the Davis Console and Nano SD.

LG
Hans