add lamp switch for bedroom

lamp_switch/lamp_switch.ino

@@ -0,0 +1,67 @@
+#include <RCSwitch.h>
+#include <avr/sleep.h>
+#include <avr/power.h>
+#include <avr/wdt.h>
+
+// Utility macros
+#define adc_disable() (ADCSRA &= ~_BV(ADEN)) // disable ADC (before power-off)
+#define adc_enable()  (ADCSRA |= _BV(ADEN)) // re-enable ADC
+#define enable_pin_interrupts()  (GIMSK |= _BV(PCIE))  // Enable Pin Change Interrupts
+
+// Pins
+#define SWITCH 0
+#define SENDER 2
+
+RCSwitch mySwitch = RCSwitch();
+
+bool stateOn = false;
+
+void setup() {
+    
+  pinMode(SWITCH, INPUT_PULLUP);
+
+  mySwitch.enableTransmit(SENDER);
+  mySwitch.setProtocol(1);
+
+  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+  enable_pin_interrupts();
+
+}
+
+void loop() {
+  sleep();
+}
+
+void sendCommand() {
+  byte state = digitalRead(SWITCH);
+  if (state == LOW) {
+    if (stateOn) {
+      mySwitch.switchOff((char*)"11111", 4);
+    } else {
+      mySwitch.switchOn((char*)"11111", 4);
+    }
+    stateOn = !stateOn;
+  }
+}
+
+void sleep() {
+  PCMSK |= _BV(PCINT0);                   // Use PB0 as interrupt pin
+  adc_disable();
+  
+  sleep_enable();                         // Sets the Sleep Enable bit in the MCUCR Register (SE BIT)
+  sei();                                  // Enable interrupts
+
+  sleep_cpu();                            // sleep
+  
+  cli();                                  // Disable interrupts
+  PCMSK &= ~_BV(PCINT0);                  // Turn off PB0 as interrupt pin
+  sleep_disable();                        // Clear SE bit
+  adc_enable();
+  
+  sei();                                  // Enable interrupts
+}
+
+ISR(PCINT0_vect) {
+  sendCommand();
+}
+