Warning led for high temperature

I was looking around web, but I couldn't found out if there is option for high temperature warning. There is option to put led on printbed that glows when is heating, but I would prefer a dedicated pin on ramps that turns on/off led when (bed/extruder or both) temperatue is higer than defined. 

Is option like that already  available or it can be easily added to firmware?



  • For the extruder you can misuse the extruder cooler fan which turns on when extruder is supposed to be hot or is still hot.

    A dedicated fuction is not available but for special cases simple to implement. SImply initalize that pin as output and put some logic into Extrer.cpp->temperatureManager to turn it on/off.
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