diff --git a/src/main.c b/src/main.c
index deee5fd..c14ecef 100644
--- a/src/main.c
+++ b/src/main.c
@@ -44,7 +44,7 @@ void setup_gpio()
     DDRB = 0xff;
     PORTB = 0;
     DDRB &= ~(1 << IGNITION_PIN);
-    PORTB |= (1 << IGNITION_PIN);   // enable pull-up
+    // PORTB |= (1 << IGNITION_PIN);   // enable pull-up
     PORTB &= ~(1 << MOSI_PIN);
     PORTB &= ~(1 << MISO_PIN);
     PORTB &= ~(1 << SCK_PIN);
@@ -80,19 +80,28 @@ void switch_power(enum power power)
     }
 }
 
+void indicate_ignition(enum power ignition)
+{
+    if(ignition) {
+        PORTB &= ~(1 << MOSI_PIN);
+        PORTB &= ~(1 << MISO_PIN);
+        PORTB &= ~(1 << SCK_PIN);
+    } else {
+        PORTB |= (1 << MOSI_PIN);
+        PORTB |= (1 << MISO_PIN);
+        PORTB |= (1 << SCK_PIN);
+    }
+}
+
 void handle_state_init()
 {
     if(ignition_on()) {
         switch_power(on);
-        PORTB &= ~(1 << MOSI_PIN);
-        PORTB &= ~(1 << MISO_PIN);
-        PORTB &= ~(1 << SCK_PIN);
+        indicate_ignition(on);
         current_state = state_on;
     } else {
         shutdown_expire = tick + SHUTDOWN_TIME_MS;
-        PORTB |= (1 << MOSI_PIN);
-        PORTB |= (1 << MISO_PIN);
-        PORTB |= (1 << SCK_PIN);
+        indicate_ignition(off);
         current_state = state_shutdown;
     }
 }
@@ -101,9 +110,7 @@ void handle_state_on()
 {
     if(!ignition_on()) {
         shutdown_expire = tick + SHUTDOWN_TIME_MS;
-        PORTB |= (1 << MOSI_PIN);
-        PORTB |= (1 << MISO_PIN);
-        PORTB |= (1 << SCK_PIN);
+        indicate_ignition(off);
         current_state = state_shutdown;
     }
 }
@@ -131,9 +138,7 @@ void handle_state_guard()
     if(guard_expire < tick) {
         if(ignition_on()) {
             switch_power(on);
-            PORTB &= ~(1 << MOSI_PIN);
-            PORTB &= ~(1 << MISO_PIN);
-            PORTB &= ~(1 << SCK_PIN);
+            indicate_ignition(on);
             current_state = state_on;
         } else {
             current_state = state_off;
@@ -148,10 +153,12 @@ void handle_state_off()
 {
     if(ignition_on()) {
         switch_power(on);
-        PORTB &= ~(1 << MOSI_PIN);
-        PORTB &= ~(1 << MISO_PIN);
-        PORTB &= ~(1 << SCK_PIN);
+        indicate_ignition(on);
         current_state = state_on;
+    } else {
+        sleep_enable();
+        sleep_cpu();
+        sleep_disable();
     }
 }
 
@@ -204,4 +211,3 @@ ISR(WDT_vect)
 {
     WDTCR |= (1 << WDIE);
 }
-