reset rain gauge to zero

[gdlesage]

First comment is great work, and easy to set up I noticed, which maybe be by design, that I am unable to reset Acurite rain gauge (Acurite-Rain899-0-1322-RT) rain value back to zero. I used mqtt explorer to reset topic 'rtl_433/9b13b3f4-rtl433/devices/Acurite-Rain899/0/1322/rain_mm' to zero, but within a min or so the topic valve returns to previous value for accumulated rainfall. This is true with rtl_433 addons running or not running, if not running, when I restart them, the rainfall changes from 0 to previous accumulated value. Over time I can imagine this number gets quite large. I can use utility meter home assistant integration to monitor interval rainfalls. Is there a trick to reset to zero?

[deviantintegral]

Interesting - what is the rain gauge itself sending? Can you check by adding output kv to your config? In general, some types of sensors have an incrementing counter that is only reset when they lose power. For example, in influxdb there's the non_negative_derivative function for this: https://stackoverflow.com/questions/38016051/how-do-i-get-consistent-values-with-influxdb-non-negative-derivative.

[gdlesage]

forgot to mention that when I reset rain gauge physical base station to zero rain mm HA still shows total accumulation rather than reset to zero.

Adding out kv gives me the following to log output:

time : 2021-07-16 13:20:02 model : Acurite-Rain899 id : 1322 channel : 0 Battery : 0 Rainfall Accumulation: 82.55 mm Integrity : CHECKSUM

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time : 2021-07-16 13:21:02 model : Acurite-Rain899 id : 1322 channel : 0 Battery : 0 Rainfall Accumulation: 84.58 mm Integrity : CHECKSUM

between 13:20:02 and 13:21:02 time, I tilled to rain gauge from side to side to increment the rain measurement.

[gdlesage]

but you are right deviantintegral , removing the batteries resets the reading to zero

time : 2021-07-16 13:31:03 model : Acurite-Rain899 id : 1322 channel : 0 Battery : 0 Rainfall Accumulation: 0.00 mm Integrity : CHECKSUM

case closed