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... // LED pin - active-high void setup() { Serial.begin(9600); // Since the other end of the reed switch is connected to ground, we need // to pull-up the reed switch pin internally. pinMode(REED_PIN, INPUT_PULLUP); pinMode(LED_PIN, OUTPUT); } v...

...ZE]; int data_index, sum; void setup() { // Serial connection begin Serial.begin(115200); pinMode(13, OUTPUT); } void loop() { static unsigned long past = 0; unsigned long present = micros(); unsigned long interval = present - past; past ...