diff --git a/src/main.cpp b/src/main.cpp
index 52524df..645845c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -180,8 +180,6 @@ void wifiConnect() {
   IPAddress subnet = IPAddress(network.subnet);
   IPAddress gateway = IPAddress(network.gateway);
 
-  Serial.println("millis(): " + String(millis()));
-
   ESP_LOGD(TAG, "previous dhcp: %lu s ago", getTimestamp() - network.last_dhcp);
 
   if ( ip != INADDR_NONE && dns != INADDR_NONE && gateway != INADDR_NONE && subnet != INADDR_NONE
@@ -214,8 +212,6 @@ void wifiConnect() {
     network.last_dhcp = getTimestamp();
   }
 
-  Serial.println("millis(): " + String(millis()));
-
   if(WiFi.status() == WL_CONNECTED) {
     ESP_LOGD("WiFi", "connected");
     //ESP_LOGD("WiFi", (WiFi.localIP().toString().c_str()));
@@ -673,7 +669,6 @@ void setup()
   esp_sleep_wakeup_cause_t wakeup_reason = esp_sleep_get_wakeup_cause();
   ++bootCount;
   ESP_LOGI(TAG, "Boot number: %d", bootCount);
-  Serial.println("millis(): " + String(millis()));
 
   ESP_LOGD(TAG, "setup hardware and sensors");
 
@@ -687,8 +682,6 @@ void setup()
   adcAttachPin(_VBAT);
   adcStart(_VBAT);
 
-  Serial.println("millis(): " + String(millis()));
-
   #define BME_SDA 21
   #define BME_SCL 22
   Wire.begin(BME_SDA, BME_SCL);
@@ -698,8 +691,6 @@ void setup()
     ESP_LOGE(TAG, "Could not find a valid BME280 sensor, check wiring!");
   }
 
-  Serial.println("millis(): " + String(millis()));
-
   if (bme680.begin()) {
     sensors_active.bme680 = true;
 
@@ -714,8 +705,6 @@ void setup()
     ESP_LOGE(TAG, "Could not find a valid BME680 sensor, check wiring!");
   }
 
-  Serial.println("millis(): " + String(millis()));
-
   if (uv.begin()) {
     sensors_active.uv = true;
 
@@ -730,8 +719,6 @@ void setup()
     ESP_LOGW(TAG, "Failed to communicate with VEML6075 sensor, check wiring?");
   }
 
-  Serial.println("millis(): " + String(millis()));
-
   if (lightMeter.begin()) {
     sensors_active.light = true;
     lightMeter.setMTreg((byte) BH1750_DEFAULT_MTREG);
@@ -739,12 +726,8 @@ void setup()
     ESP_LOGW(TAG, "Failed to communicate with BH1750 sensor, check wiring?");
   }
 
-  Serial.println("millis(): " + String(millis()));
-
   //sds.begin(); // don't call begin, only messes with Serial
 
-  Serial.println("millis(): " + String(millis()));
-
   if (wakeup_reason == ESP_SLEEP_WAKEUP_UNDEFINED || bootCount == 1) {
     FirmwareVersionResult sds_fw = sds.queryFirmwareVersion();
     if (sds_fw.isOk()) {
@@ -757,15 +740,11 @@ void setup()
     }
   }
 
-  Serial.println("millis(): " + String(millis()));
-
   // initialize e-paper display
   SPI.begin(18, 19, 23, TFT_CS); // MISO is not connected to TFT_MISO!
   display.init(0, false, false);
   display.setRotation(1);
 
-  Serial.println("millis(): " + String(millis()));
-
   if (wakeup_reason == ESP_SLEEP_WAKEUP_UNDEFINED || bootCount == 1) {
     // wakeup not caused by deep sleep
     display.clearScreen();
@@ -779,7 +758,6 @@ void setup()
   }
 
   ESP_LOGD(TAG, "connecting to WiFi");
-  Serial.println("millis(): " + String(millis()));
 
   wifiConnect();