Hi Paul,
that line is red is the clue - the only rain value logged by the device is 
the accumulated measurement.
The counter has an internal limit that you have reached (10 metres), which 
Oregon in their wisdom decided would be enough for anybody.

We know of no software method to reset the value, so you need to consult 
the manual to use the touchpad on the console to reset the counter. 

On Wednesday, 14 April 2021 at 5:23:36 pm UTC+10 [email protected] wrote:

> Hi all, 
>
> I am using for some time weewx  on my wmr300 Oregon scientific meteo 
> station . I am on all updates running weewx 4.5.1 and Belchertown skin.
>
> From some time my rain rate is indicating :
>
> Wind 0.7 m/s from 59° (ENE) 
> Rain Rate 1.5 mm/h 
> Inside Temperature 24.3°C 
>
> but on accumulated values is only showing zero 
>
> Today's Rain 0.0 mm 
> High Rain Rate 3.3 mm/h at 08:45:00 
> High Wind 2.1 m/s from 87° at 03:30:00 
>
> in the logs I found an indication 
>
> INFO weewx.engine: Starting main packet loop.
> Apr 14 10:04:23 meteopi weewx[719] INFO weewx.drivers.wmr300: possible 
> missed rain event: new=10160.0 old=None
> Apr 14 10:04:23 meteopi weewx[719] INFO weewx.drivers.wmr300: rain 
> counter at maximum, reset required
> Apr 14 10:04:43 meteopi weewx[719] INFO weewx.drivers.wmr300: history 
> buffer at 6.32% (2100)
>
> How can I solve the problem ?
>
> Paul 
>
>
>
>

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