Huge difference between rainfall displayed on RX and CumulusMX - Printable Version

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+--- Thread: Huge difference between rainfall displayed on RX and CumulusMX (/Thread-Huge-difference-between-rainfall-displayed-on-RX-and-CumulusMX)

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Huge difference between rainfall displayed on RX and CumulusMX - cjthomson - 24-07-2016

Hey Everyone

I've found a strange issue today whereby there is a large difference between the amount of rainfall for today displayed on the LCD of the RX unit and what is recorded in CumulusMX. We have had very heavy rain over the last hour or two and the RX shows rainfall of 122.88mm whereas CumulusMX shows 12mm! I'm inclined to believe CumulusMX. Has anyone else had this issue?

My outdoor sensors are currently Auriol (Wind, Temp + Rain). I have a V6 RX unit which is running the latest software.

My rain readings have previously seemed okay.

Chris

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RE: Huge difference between rainfall displayed on RX and CumulusMX - werk_ag - 25-07-2016

Hi Chris,

I will check that...
Thanks for reporting.

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RE: Huge difference between rainfall displayed on RX and CumulusMX - Shred - 26-07-2016

Check the line "RainMult=" in Cumulus.ini.

It adjusts the calibration of the rain sensor - but only for values displayed in and recorded in Cumulus.

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RE: Huge difference between rainfall displayed on RX and CumulusMX - cjthomson - 26-07-2016

Hi Shred

I don't think the problem is with Cumulus, however I've double checked the multiplier setting in Cumulus.ini and it shows

RainMult=1.25

This is the correct figure for the Auriol Wireless Rain Gauge as detailed in the Cumulus setup guide posted on here.

Chris

(26-07-2016, 01:41)Shred Wrote:  Check the line "RainMult=" in Cumulus.ini.

It adjusts the calibration of the rain sensor - but only for values displayed in and recorded in Cumulus.

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RE: Huge difference between rainfall displayed on RX and CumulusMX - cjthomson - 27-07-2016

I've been doing a wee bit more testing this evening and this is what I've noted so far.

To see how many rain tips the RX unit has recorded today I added the following line in the code for the Wireless Sensors -

Serial.print(" Rain Tips Today :"); Serial.println(RainToday_tips);

The serial monitor shows 1 tip recorded.

I then added this line

Serial.print("Rainfall Today:"); Serial.println(Output_RToday);

The serial monitor displayed 2.56mm of rainfall which as expected matches what is on the RX Display. The rainfall shown in CumulusMX is 0.25mm.


Chris

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RE: Huge difference between rainfall displayed on RX and CumulusMX - werk_ag - 27-07-2016

Hi Chris

I found the problem. There is a bug which affects the rain today value shown on the LCD display, for users using the Auriol rain gauge.

Later tonight I will upload an updated software package.
Thank you for your efforts to demonstrate the problem

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