Minor refactor while failing to grok serial readline

arduino/LEDSwitch/LEDSwitch.ino

@@ -21,19 +21,10 @@ void ledBlink() {
   }
 }
 
-void setup() {
+void handleInput() {
-  pinMode(LED_PIN, OUTPUT);
+  int c = Serial.read();
-  Serial.begin(BAUD_RATE);
-}
 
-void loop() {
+  switch (c) {
-  if (Serial.available() <= 0) {
-    return;
-  }
-
-  int command = Serial.read();
-
-  switch (command) {
   case '1':
     ledOn();
     break;
@@ -45,6 +36,19 @@ void loop() {
     break;
   default:
     Serial.print("Unknown command: ");
-    Serial.println(command);
+    Serial.println(c);
   }
 }
+
+void setup() {
+  pinMode(LED_PIN, OUTPUT);
+  Serial.begin(BAUD_RATE);
+}
+
+void loop() {
+  if (Serial.available() <= 0) {
+    return;
+  }
+
+  handleInput();
+}