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The final stage of my rainwater filter system is a UV disinfectant. The control module has an indicator for "lamp good" and "lamp bad," but the whole thing is in a shed outside. I plan to use an ESP32 or something to monitor and alert me in case of failure.

How should I detect a failure?

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@kr4dio we have a similar need for a septic system. We have hard wired an alarm. Cannot hear the alarm from house so will also be adding a blinking light. Having said that by day two of the pump not working you can smell it from the house.

@berry
If it is in an out building an outdoor colored light woulb be nice. Or one of those airhorns from harbor freight haha
@kr4dio

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