diff --git a/firmware/config.h b/firmware/config.h
index 2703b24..50ffc2b 100644
--- a/firmware/config.h
+++ b/firmware/config.h
@@ -30,7 +30,7 @@
 
 #define SEALEVELPRESSURE_HPA (1013.25)
 
-#define STATUS_LED_PIN        BUILTIN_LED
+#define STATUS_LED_PIN        LED_BUILTIN
 #define ANEMOMETER_PIN        D7
 #define BAT_CHARGED_PIN       D6
 #define BAT_CHARGING_PIN      D5
@@ -39,7 +39,7 @@
 #define BME_MISO 12
 #define BME_MOSI 11
 #define BME_CS   10
-#define BME280_ADDRESS 0x76
+#define BME_ADDRESS 0x76
 
 #define INITIAL_WEBSERVER_TIME 20
 
diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 14481da..e94218b 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -114,7 +114,7 @@ void setup() {
   apds.enableColor(true);
 
   //Temperature + pressure
-  bool status = bme.begin(0x76);
+  bool status = bme.begin(BME_ADDRESS);
   if (!status) {
 #ifdef DEBUG
     Serial.println("Could not find a valid BME280 sensor, check wiring!");
@@ -158,7 +158,8 @@ void criticalBatCheck() {
     Serial.println("Bat Voltage: " + String(volt) + " V");
     Serial.println("Low battery, going into deep sleep.");
 #endif
-    ESP.deepSleep(EMERGENCY_SLEEP_S * 1000000); // battery low, shutting down
+    // Casting to an unsigned int, so it fits into the integer range
+    ESP.deepSleep(1U * EMERGENCY_SLEEP_S * 1000000); // battery low, shutting down
     delay(100);
   }
 }
diff --git a/firmware/libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h b/firmware/libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h
index 7742afc..3134ca3 100644
--- a/firmware/libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h
+++ b/firmware/libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h
@@ -143,7 +143,7 @@ class Adafruit_Sensor {
   virtual ~Adafruit_Sensor() {}
 
   // These must be defined by the subclass
-  virtual void enableAutoRange(bool enabled) {};
+  /// NOT USED virtual void enableAutoRange(bool enabled) {};
   virtual bool getEvent(sensors_event_t*) = 0;
   virtual void getSensor(sensor_t*) = 0;
   
diff --git a/firmware/webUpdater.ino b/firmware/webUpdater.ino
index c846d61..7c93097 100644
--- a/firmware/webUpdater.ino
+++ b/firmware/webUpdater.ino
@@ -63,7 +63,7 @@ void showHTMLMain(void) {
 "<tr><td>light</td><td>" + String(sensValues[SENSOR_LIGHT]) + "</td></tr>"
 "<tr><td>windspeed</td><td>" + String(sensValues[SENSOR_WINDSPEED]) + "</td></tr>"
 "<tr><td>pressure</td><td>" + String(sensValues[SENSOR_PRESSURE]) + "</td></tr>"
-"<tr><td>batvoltage</td><td>" + String(sensValues[SENSOR_BAT_VOLTAGE]) + "</td></tr>";
+"<tr><td>batvoltage</td><td>" + String(sensValues[SENSOR_BAT_VOLTAGE]) + "</td></tr>"
 "</table>"
 "</body></html>";