Hello,

I'm running a few high power LEDs that generate some heat which over time will become too warm (even the heatsink). I've mounted a BME280 and AM2302 to get temperature readings close enough the heatsink.

Is it possible, with automation to activate a relay to start two fans to run if temperature is over 40deg C (the reading from the sensor) and disable it when it cooled the heatsinks to < 30 deg C?

If not, how can I activate the relay if its over 40 degrees and run it for 30 minutes and evaluate the reading again over time?

I'm running this with the irrigation hat I got from tindie as info.

Thanks for a really cool project!

/Carl