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arduino codes/iot_water_pump.ino

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+/*
+ * Created by ArduinoGetStarted.com
+ *
+ * This example code is in the public domain
+ *
+ * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-controls-pump
+ */
+
+// constants won't change
+const int RELAY_PIN = 3;  // the Arduino pin, which connects to the IN pin of relay
+
+// the setup function runs once when you press reset or power the board
+void setup() {
+  // initialize digital pin D3 as an output.
+  pinMode(RELAY_PIN, OUTPUT);
+}
+
+// the loop function runs over and over again forever
+void loop() {
+  digitalWrite(RELAY_PIN, HIGH); // turn on pump 5 seconds
+  delay(5000);
+  digitalWrite(RELAY_PIN, LOW);  // turn off pump 5 seconds
+  delay(5000);
+}