Use previous value if current value is null?

[Kevin Key]

Is there a way to get weewx to make use of the last sensor value if the current value is null? I have a barometer sensor that sometimes reports null values. When this happens, I'd like to weewx to make use of the previous value. Is this possible?

[Tom Keffer]

I can think of three approaches.

1. You could write a WeeWX service that caches the barometer data.

2. Use the last non-null value in the database. Try $day.barometer.last and see if that works for you.

3. Fix or replace the sensor.

One hazard of approaches #1 and #2 is that the datum could be hopelessly out of date if the sensor goes down for a while.

On Sat, Oct 22, 2022 at 5:12 PM Kevin Key <kevi...@gmail.com> wrote:

Is there a way to get weewx to make use of the last sensor value if the current value is null? I have a barometer sensor that sometimes reports null values. When this happens, I'd like to weewx to make use of the previous value. Is this possible?

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[Kevin Key]

Thanks.