Add Arduino power script

power.ino

@@ -0,0 +1,87 @@
+/*
+ * Power: Activate a relay to simulate pressing the power button of a PC
+ * A Raspberry Pi or clone must be attached to I2C.
+ * TODO: add IR support
+ */
+
+#include <IRremote.h>
+#include <Wire.h>
+
+const int RECV_PIN = 11;
+const int ledPin = 13;
+int incomingByte = 0;
+
+IRrecv irrecv(RECV_PIN);
+
+decode_results results;
+
+void setup()
+{
+  Serial.begin(9600);
+  // In case the interrupt driver crashes on setup, give a clue
+  // to the user what's going on.
+  Serial.println("Enabling IRin");
+  irrecv.enableIRIn(); // Start the receiver
+  Serial.println("Enabled IRin");
+  pinMode(12, OUTPUT);
+  digitalWrite(12, LOW);
+
+  pinMode(7, INPUT);
+  
+  // i2c code
+  Wire.begin(0x8);                // join i2c bus with address #8
+  Wire.onReceive(receiveEvent); // register event
+  pinMode(ledPin, OUTPUT);
+  digitalWrite(ledPin, LOW); // turn it off
+}
+
+void loop() {
+  if (irrecv.decode(&results)) {
+    Serial.println(results.value);
+    if(results.value == 16580863) {
+      pressTheButton();
+    }
+    irrecv.resume(); // Receive the next value
+  }
+  delay(100);
+  if(digitalRead(7)) { // In case the user presses the original power button
+    pressTheButton();
+    delay(1000);
+  }
+  if (Serial.available() > 0) {
+    // read the incoming byte:
+    incomingByte = Serial.read();
+    if(incomingByte == 120) {
+      pressTheButton();
+    }
+  }
+  //pressTheButton();
+}
+
+
+
+void receiveEvent(int howMany) {
+  Serial.println("event");
+  while (Wire.available()) { // loop through all but the last
+    int c = Wire.read(); // receive byte as a character
+    if(c == 120) {
+      pressTheButton();
+    }
+    
+  }
+  
+}
+       
+void pressTheButton() {
+  if(millis() > 5000) { // Avoid any bootup false inputs
+    digitalWrite(12, HIGH); // toggle relay for power button for 0.5 sec
+    digitalWrite(ledPin, HIGH);
+    sei();      //Enables interrupts
+    delay(500);   //Wait 1 second
+    //cli(); 
+    //delay(500);
+    digitalWrite(12, LOW);
+    digitalWrite(ledPin, LOW);
+    Serial.println("button pressed!");
+  }
+}