80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
// door status on arduino
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// arduino is Duemilanove
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// sensor is a reed sensor
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const int REED_SWITCH_INPUT_PIN = 13;
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const int RED_LED_OUTPUT_PIN = 12;
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const int YELLOW_LED_OUTPUT_PIN = 11;
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const int GREEN_LED_OUTPUT_PIN = 10;
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void setup(){
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Serial.begin(9600);
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pinMode(REED_SWITCH_INPUT_PIN, INPUT);
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pinMode(RED_LED_OUTPUT_PIN, OUTPUT);
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pinMode(YELLOW_LED_OUTPUT_PIN, OUTPUT);
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pinMode(GREEN_LED_OUTPUT_PIN, OUTPUT);
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}
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const int DELAY_TIME = 1000;
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const int THRESHOLD = 20;
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int space_status = THRESHOLD / 2;
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int space_status_b4 = 0;
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void print_status() {
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Serial.print(" ");
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Serial.print(space_status_b4);
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Serial.print(" ");
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Serial.println(space_status);
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}
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void loop(){
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print_status();
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int pin_status = 0;
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pin_status = digitalRead(REED_SWITCH_INPUT_PIN);
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// pin check of the reed sensor and low pass filter
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if (pin_status == 0){
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if (space_status > 0){
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space_status -= 1;
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}
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} else if (pin_status == 1){
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if (space_status < THRESHOLD){
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space_status += 1;
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}
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}
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// status check if we can switch the status.
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// low pass prevents waggling a bit
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if (space_status >= THRESHOLD-3) {
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// closed
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space_status_b4 = 1;
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} else if (space_status <= 3) {
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// open
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space_status_b4 = 0;
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}
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delay(DELAY_TIME);
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// ampel / traffic light signals
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if (space_status_b4 == 1) {
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// closed
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digitalWrite(RED_LED_OUTPUT_PIN, HIGH);
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digitalWrite(GREEN_LED_OUTPUT_PIN, LOW);
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} else if (space_status_b4 == 0) {
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// open
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digitalWrite(RED_LED_OUTPUT_PIN, LOW);
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digitalWrite(GREEN_LED_OUTPUT_PIN, HIGH);
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}
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if (space_status > 3 && space_status < THRESHOLD - 3) {
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digitalWrite(YELLOW_LED_OUTPUT_PIN, HIGH);
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} else {
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digitalWrite(YELLOW_LED_OUTPUT_PIN, LOW);
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}
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}
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