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2 changes: 2 additions & 0 deletions examples/PID_RelayOutput/PID_RelayOutput.ino
Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,8 @@ unsigned long windowStartTime;

void setup()
{
pinMode(RELAY_PIN, OUTPUT);

windowStartTime = millis();

//initialize the variables we're linked to
Expand Down