diff --git a/src/main.cpp b/src/main.cpp
index 38248d4..5be7157 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -25,136 +25,136 @@ static const int WIFI_CONNECT_RETRY_MAX = 30;
 
 void mqtt_callback(char *topic, byte *payload, unsigned int length)
 {
-  payload[length] = '\0';
-  String state((const char *)payload);
-  is_disarmed = state == "disarmed";
+    payload[length] = '\0';
+    String state((const char *)payload);
+    is_disarmed = state == "disarmed";
 
-  if (state == "armed_away")
-  {
-    keypad->draw();
-  }
+    if (state == "armed_away")
+    {
+        keypad->draw();
+    }
 
-  Serial.println(state);
-  keypad->write(state);
+    Serial.println(state);
+    keypad->write(state);
 }
 
 void lock()
 {
-  if (is_disarmed)
-  {
-    mqtt->send("ARM_AWAY");
-  }
+    if (is_disarmed)
+    {
+        mqtt->send("ARM_AWAY");
+    }
 }
 
 void unlock()
 {
-  mqtt->send("DISARM");
+    mqtt->send("DISARM");
 }
 
 bool isConnecting = false;
 void initWifi(Settings *settings)
 {
-  if (!settings)
-  {
-    keypad->write("no settings");
-    return;
-  }
+    if (!settings)
+    {
+        keypad->write("no settings");
+        return;
+    }
 
-  if (isConnecting)
-  {
-    keypad->write("already connecting");
-    return;
-  }
+    if (isConnecting)
+    {
+        keypad->write("already connecting");
+        return;
+    }
 
-  isConnecting = true;
-  keypad->write("connecting");
+    isConnecting = true;
+    keypad->write("connecting");
 
-  WiFi.begin(settings->gettext("wifi:ssid"), settings->gettext("wifi:password"));
+    WiFi.begin(settings->gettext("wifi:ssid"), settings->gettext("wifi:password"));
 
-  if (WiFi.isConnected())
-  {
-    WiFi.disconnect();
-  }
+    if (WiFi.isConnected())
+    {
+        WiFi.disconnect();
+    }
 
-  Serial.print("Connecting to Wi-Fi network");
-  for (int cnt_retry = 0; cnt_retry < WIFI_CONNECT_RETRY_MAX && !WiFi.isConnected();
-       cnt_retry++)
-  {
-    delay(500);
-    Serial.print(".");
-  }
-  Serial.println("");
-  if (WiFi.isConnected())
-  {
-    Serial.print("Local IP: ");
-    Serial.println(WiFi.localIP());
-    isConnecting = false;
-    keypad->write("connected");
-  }
-  else
-  {
-    keypad->write("failed to connect");
-    isConnecting = false;
-    return;
-  }
+    Serial.print("Connecting to Wi-Fi network");
+    for (int cnt_retry = 0; cnt_retry < WIFI_CONNECT_RETRY_MAX && !WiFi.isConnected();
+         cnt_retry++)
+    {
+        delay(500);
+        Serial.print(".");
+    }
+    Serial.println("");
+    if (WiFi.isConnected())
+    {
+        Serial.print("Local IP: ");
+        Serial.println(WiFi.localIP());
+        isConnecting = false;
+        keypad->write("connected");
+    }
+    else
+    {
+        keypad->write("failed to connect");
+        isConnecting = false;
+        return;
+    }
 }
 
 void initTOTP(Settings *settings)
 {
-  uint8_t *base32_key = new uint8_t[20];
-  const char *hmac = ((String)settings->gettext("totp:hmac")).c_str();
+    uint8_t *base32_key = new uint8_t[20];
+    const char *hmac = ((String)settings->gettext("totp:hmac")).c_str();
 
-  for (int i = 0; i < 20; i++)
-  {
-    base32_key[i] = (uint8_t)hmac[i];
-  }
+    for (int i = 0; i < 20; i++)
+    {
+        base32_key[i] = (uint8_t)hmac[i];
+    }
 
-  TOTP(base32_key, 20, 30);
+    TOTP(base32_key, 20, 30);
 }
 
 void setup()
 {
-  M5.begin();
+    M5.begin();
 
-  keypad = new Keypad();
-  keypad->write("loading");
+    keypad = new Keypad();
+    keypad->write("loading");
 
-  auto settings = new Settings();
+    auto settings = new Settings();
 
-  if (!settings)
-  {
-    keypad->write("unable to load settings");
-    return;
-  }
+    if (!settings)
+    {
+        keypad->write("unable to load settings");
+        return;
+    }
 
-  mqtt = new MQTT(settings, mqtt_callback);
+    mqtt = new MQTT(settings, mqtt_callback);
 
-  initWifi(settings);
-  mqtt->connect();
-  timeClient.begin();
-  initTOTP(settings);
+    initWifi(settings);
+    mqtt->connect();
+    timeClient.begin();
+    initTOTP(settings);
 }
 
 void submit(String code)
 {
-  uint32_t newCode = getCodeFromTimestamp(timeClient.getEpochTime());
-  uint32_t input = code.toInt();
+    uint32_t newCode = getCodeFromTimestamp(timeClient.getEpochTime());
+    uint32_t input = code.toInt();
 
-  if (newCode == input)
-  {
-    unlock();
-    return;
-  }
+    if (newCode == input)
+    {
+        unlock();
+        return;
+    }
 
-  lock();
+    lock();
 }
 
 void loop()
 {
-  timeClient.update();
-  mqtt->loop();
+    timeClient.update();
+    mqtt->loop();
 
-  auto value = keypad->get_input();
-  if (value.has_value())
-    submit(value.value());
+    auto value = keypad->get_input();
+    if (value.has_value())
+        submit(value.value());
 }