Using cumulative rain

Ian A

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Jan 15, 2020, 8:25:34 AM1/15/20

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Hi

I am receiving a non resetting cumulative rain total via MQTT using the wxMesh driver, as the driver doesn't have the rain delta functionality like the SDR driver etc. Can this be accomplished within weewx or is modifying the wxMesh driver the only way to get usable rain values?

Ian

gjr80

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Jan 15, 2020, 4:26:20 PM1/15/20

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Hi,

No there is no mechanism within WeeWX to directly support rain as a cumulative value. The usual approach is for the driver or service feeding the rain data to WeeWX to derive a delta rain value and include that value in the data passed to WeeWX. The calculation is very simple and is commonly used as many stations provide rain as a cumulative value only.

Gary

Thomas Keffer

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Jan 15, 2020, 7:00:15 PM1/15/20

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This motivated me to post issue #491.

-tk

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Rich Bell

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Jan 15, 2020, 7:21:47 PM1/15/20

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Nice!

In the meantime I’m looking to add support for it in MQTTSubscribe, #40 - to tide people over until 4.1.

Rich

On Wednesday, 15 January 2020 19:00:15 UTC-5, Thomas Keffer wrote:

This motivated me to post issue #491.

-tk

On Wed, Jan 15, 2020 at 1:26 PM gjr80 <gjrod...@gmail.com> wrote:

Hi,

No there is no mechanism within WeeWX to directly support rain as a cumulative value. The usual approach is for the driver or service feeding the rain data to WeeWX to derive a delta rain value and include that value in the data passed to WeeWX. The calculation is very simple and is commonly used as many stations provide rain as a cumulative value only.

Gary

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Ian A

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Jan 16, 2020, 12:25:58 AM1/16/20

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Thank-you everyone for the reply's, I look forward to 4.1 sometime down the road but for now ill give the next version of MQTTSubscribe a try.

Ian

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