I use the onboard LED on pin 13 as a simple visual monitor, to see that, 1; the program is running and 2; how fast the it get around the loop. So I have a function like this: void HeartBeat(void) { if (HeartBeatState>0) { digitalWrite(13,HIGH); HeartBeatState= 0; } else{ digitalWrite(13,LOW…

Switching an Output to opposite to last status

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