Adding powerswitch-version with display

touchless_power_switch_with_display/touchless_power_switch_with_display.ino

@@ -0,0 +1,76 @@
+const int US_sensorPin = 7;
+const int relayPin = 10;
+const int range = 8;   //Range of detection from the sensor in cm
+int valRelay = 0;      // variable to store the read value
+long relayAction;
+bool newAction;
+
+#include <LiquidCrystal.h>
+LiquidCrystal lcd(12,11,5,4,3,2);
+
+void setup() {
+  Serial.begin (9600); //Allows serial output to serial monitor
+  pinMode(relayPin, OUTPUT);
+  digitalWrite(relayPin, HIGH); // Default relay should be OFF!
+  
+  lcd.begin(16,2); //Say what format of LCD we are using.
+  lcd.clear();
+  lcd.setCursor(0,0); //Goto line 0 char 0
+  lcd.print("RC Solutions");
+  lcd.setCursor(0,1); //Goto second line
+  lcd.print("touchless v1");
+  delay(1500);
+  lcd.clear();
+  lcd.setCursor(0,0); //Goto line 0 char 0
+
+  lcd.print("Power Status:");
+  lcd.setCursor(0,1); //Goto second line
+  lcd.print("OFF");
+}
+
+void loop() {
+  long duration, cm;
+  pinMode(US_sensorPin, OUTPUT);
+  digitalWrite(US_sensorPin, LOW);
+  delayMicroseconds(2);
+  digitalWrite(US_sensorPin, HIGH);
+  delayMicroseconds(5);
+  digitalWrite(US_sensorPin, LOW);
+  pinMode(US_sensorPin, INPUT);
+  duration = pulseIn(US_sensorPin, HIGH);
+
+  cm = microsecondsToCentimeters(duration);
+
+  if (cm < range && cm > 1) {
+
+    if (newAction) {
+      valRelay = digitalRead(relayPin);   // read the status of input pin
+      if (valRelay) {
+        relayAction = LOW;
+        lcd.clear();
+        lcd.print("Power Status:");
+        lcd.setCursor(0,1); //Goto second line
+        lcd.print("ON");
+      } else {
+        relayAction = HIGH;
+        lcd.clear();
+        lcd.print("Power Status:");
+        lcd.setCursor(0,1); //Goto second line
+        lcd.print("OFF");
+      }
+
+      digitalWrite(relayPin, relayAction);   // Switch Ralay ON or OFF
+      newAction = false;
+    }
+    //lcd.print(newAction);
+    delay(1000); // Miliseconds which it waits before does any action again
+    
+  } else {
+    newAction = true;
+    //lcd.print(newAction);
+  }
+}
+
+long microsecondsToCentimeters(long microseconds) {
+  return microseconds / 29 / 2;
+}