Initial automatic seat relay controller

.gitignore

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+build/
+*.hex
+*.elf
+*.eep
+*.map
+*.lst
+*.o

Auto_Seat.ino

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+// Auto_Seat
+// Initial automatic seat relay controller.
+
+#define seatRelayD8 8
+#define seatRelayD9 9
+#define parkingPin A0
+#define ignitionPin 7
+
+const int PARKING_ON_THRESHOLD = 950;
+const int PARKING_OFF_THRESHOLD = 940;
+const unsigned long SEAT_UP_MS = 2000UL;
+const unsigned long SEAT_DOWN_MS = 2200UL;
+
+boolean parkingState = LOW;
+boolean ignitionState = LOW;
+boolean previousDriveMode = LOW;
+int parkingRawValue = 0;
+unsigned long moveStartTime = 0;
+int seatAction = 0;
+
+void setup() {
+  pinMode(parkingPin, INPUT);
+  pinMode(ignitionPin, INPUT);
+  pinMode(seatRelayD8, OUTPUT);
+  pinMode(seatRelayD9, OUTPUT);
+  applySeatAction(0);
+}
+
+void loop() {
+  measurement();
+  boolean driveMode = ignitionState == HIGH && parkingState == LOW;
+
+  if (driveMode != previousDriveMode) {
+    previousDriveMode = driveMode;
+    moveStartTime = millis();
+    seatAction = driveMode ? 1 : -1;
+  }
+
+  if (seatAction == 1 && millis() - moveStartTime >= SEAT_UP_MS) seatAction = 0;
+  if (seatAction == -1 && millis() - moveStartTime >= SEAT_DOWN_MS) seatAction = 0;
+  applySeatAction(seatAction);
+}
+
+void measurement() {
+  ignitionState = digitalRead(ignitionPin);
+  parkingRawValue = analogRead(parkingPin);
+  if (parkingState == LOW && parkingRawValue >= PARKING_ON_THRESHOLD) parkingState = HIGH;
+  else if (parkingState == HIGH && parkingRawValue <= PARKING_OFF_THRESHOLD) parkingState = LOW;
+}
+
+void setRelay(int relayPin, boolean state) {
+  digitalWrite(relayPin, state ? LOW : HIGH);
+}
+
+void applySeatAction(int action) {
+  if (action == 1) {
+    setRelay(seatRelayD8, 1);
+    setRelay(seatRelayD9, 0);
+  } else if (action == -1) {
+    setRelay(seatRelayD8, 0);
+    setRelay(seatRelayD9, 1);
+  } else {
+    setRelay(seatRelayD8, 0);
+    setRelay(seatRelayD9, 0);
+  }
+}