diff --git a/main/Kconfig.projbuild b/main/Kconfig.projbuild
index a3e708d..c310a28 100644
--- a/main/Kconfig.projbuild
+++ b/main/Kconfig.projbuild
@@ -25,4 +25,24 @@ menu "EspTunnel Configuration"
         help
             The UART interface to use for RX and TX.
 
+    choice ESPTNL_LOG_LEVEL
+        prompt "Log level"
+        default ESPTNL_LOG_DEBUG
+        help
+            The application's own log level.
+
+        config ESPTNL_LOG_NONE
+            bool "None"
+        config ESPTNL_LOG_ERROR
+            bool "Error"
+        config ESPTNL_LOG_WARN
+            bool "Warning"
+        config ESPTNL_LOG_INFO
+            bool "Information"
+        config ESPTNL_LOG_DEBUG
+            bool "Debug"
+        config ESPTNL_LOG_VERBOSE
+            bool "Verbose"
+    endchoice
+
 endmenu
\ No newline at end of file
diff --git a/main/app_config.cpp b/main/app_config.cpp
index 046240d..9946920 100644
--- a/main/app_config.cpp
+++ b/main/app_config.cpp
@@ -2,6 +2,8 @@
 // Created by erki on 11/06/23.
 //
 
+#include "app_config.hpp"
+
 #include <cstdint>
 
 #include "esp_now.h"
diff --git a/main/app_config.hpp b/main/app_config.hpp
new file mode 100644
index 0000000..d265afa
--- /dev/null
+++ b/main/app_config.hpp
@@ -0,0 +1,31 @@
+//
+// Created by erki on 12/06/23.
+//
+
+#pragma once
+
+#include "esp_log.h"
+
+namespace Config
+{
+
+constexpr esp_log_level_t appLogLevel()
+{
+#ifdef CONFIG_ESPTNL_LOG_NONE
+  return ESP_LOG_NONE;
+#elifdef CONFIG_ESPTNL_LOG_ERROR
+  return ESP_LOG_ERROR;
+#elifdef CONFIG_ESPTNL_LOG_WARN
+  return ESP_LOG_WARN;
+#elifdef CONFIG_ESPTNL_LOG_INFO
+  return ESP_LOG_INFO;
+#elifdef CONFIG_ESPTNL_LOG_DEBUG
+  return ESP_LOG_DEBUG;
+#elifdef CONFIG_ESPTNL_LOG_VERBOSE
+  return ESP_LOG_VERBOSE;
+#else
+# error "Invalid log setting set."
+#endif
+}
+
+}
diff --git a/main/app_networking.cpp b/main/app_networking.cpp
index 6d96c4d..73bee9b 100644
--- a/main/app_networking.cpp
+++ b/main/app_networking.cpp
@@ -17,8 +17,6 @@ namespace
 
 using namespace Networking;
 
-static const char* TAG = "Networking";
-
 static_assert(std::is_standard_layout_v<EspNowEvent> && std::is_trivial_v<EspNowEvent>,
         "EspNowEvent is not compatible with a FreeRTOS queue.");
 
@@ -55,7 +53,7 @@ void s_cbEspNowSendComplete(const std::uint8_t* peer_mac, esp_now_send_status_t
 {
   EspNowEvent event = { EspNowEvent::MSG_SEND_COMPLETE, 0 };
   xQueueSend(s_esp_now_queue, &event, 0);
-  ESP_LOGD(TAG, "Send complete.");
+  ESP_LOGD(LOG_TAG, "Send complete.");
 }
 
 void s_cbEspNowReceiveComplete(const esp_now_recv_info_t* recv_info, const std::uint8_t* data, int len)
@@ -65,7 +63,7 @@ void s_cbEspNowReceiveComplete(const esp_now_recv_info_t* recv_info, const std::
 
   EspNowEvent event = { EspNowEvent::MSG_RECEIVED, rx_len };
   xQueueSend(s_esp_now_queue, &event, 0);
-  ESP_LOGD(TAG, "Received message. Length: %d.", len);
+  ESP_LOGD(LOG_TAG, "Received message. Length: %d.", len);
 }
 
 }
@@ -118,11 +116,11 @@ void sendData(const std::array<std::uint8_t, 128>& buffer, const std::size_t len
   {
     ESP_ERROR_CHECK_WITHOUT_ABORT(esp_now_send(peer_mac->data(), buffer.data(), length));
 
-    ESP_LOGD(TAG, "Message send started.");
+    ESP_LOGD(LOG_TAG, "Message send started. Length: %u", length);
   }
   else
   {
-    ESP_LOGW(TAG, "Dropped message.");
+    ESP_LOGW(LOG_TAG, "Dropped message.");
   }
 }
 
diff --git a/main/app_networking.hpp b/main/app_networking.hpp
index f2d3e41..3c68824 100644
--- a/main/app_networking.hpp
+++ b/main/app_networking.hpp
@@ -9,6 +9,8 @@
 namespace Networking
 {
 
+static const char* LOG_TAG = "Networking";
+
 struct EspNowEvent
 {
   enum : std::uint8_t
diff --git a/main/esp_tunnel.cpp b/main/esp_tunnel.cpp
index 1a0721d..ee47c11 100644
--- a/main/esp_tunnel.cpp
+++ b/main/esp_tunnel.cpp
@@ -4,6 +4,7 @@
 
 #include "app_networking.hpp"
 #include "app_serial.hpp"
+#include "app_config.hpp"
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/queue.h"
@@ -15,7 +16,7 @@
 namespace
 {
 
-static const char* TAG = "App";
+static const char* LOG_TAG = "App";
 
 TaskHandle_t s_main_task = nullptr;
 
@@ -27,7 +28,7 @@ QueueHandle_t s_uart_queue = nullptr;
 
 void s_sendUartData(const std::size_t len)
 {
-  ESP_LOGD(TAG, "Sending %u bytes via UART.", len);
+  ESP_LOGD(LOG_TAG, "Sending %u bytes via UART.", len);
 
   std::array<std::uint8_t, 128> tx_buffer;
   uart_read_bytes(CONFIG_ESPTNL_UART, tx_buffer.data(), len, 0);
@@ -48,14 +49,14 @@ std::size_t s_uartBytesWaiting()
   {
     QueueSetMemberHandle_t queue_select = xQueueSelectFromSet(s_queue_set, portMAX_DELAY);
 
-    ESP_LOGI(TAG, "Event: %s.", queue_select == s_esp_now_queue ? "ESP-NOW event" : "UART event");
+    ESP_LOGI(LOG_TAG, "Event: %s.", queue_select == s_esp_now_queue ? "ESP-NOW event" : "UART event");
 
     if (queue_select == s_esp_now_queue)
     {
       Networking::EspNowEvent event;
       xQueueReceive(queue_select, &event, 0);
 
-      ESP_LOGD(TAG, "ESP-NOW event: %u, rx-length: %ull.", event.type, event.rx_length);
+      ESP_LOGD(LOG_TAG, "ESP-NOW event: %u, rx-length: %ull.", event.type, event.rx_length);
 
       if (event.type == Networking::EspNowEvent::MSG_RECEIVED)
       {
@@ -63,18 +64,18 @@ std::size_t s_uartBytesWaiting()
         uart_get_tx_buffer_free_size(CONFIG_ESPTNL_UART, &uart_free);
         if (uart_free >= event.rx_length)
         {
-          ESP_LOGD(TAG, "ESP-NOW event: wrote %ull bytes to UART RX.", uart_free);
+          ESP_LOGD(LOG_TAG, "ESP-NOW event: wrote %ull bytes to UART RX.", uart_free);
           const auto& esp_rx_buffer = Networking::getRxBuffer();
           uart_write_bytes(CONFIG_ESPTNL_UART, esp_rx_buffer.data(), event.rx_length);
         }
         else
         {
-          ESP_LOGW(TAG, "ESP-NOW event: dropped RX data due to full UART RX buffer.");
+          ESP_LOGW(LOG_TAG, "ESP-NOW event: dropped RX data due to full UART RX buffer.");
         }
       }
       else if (event.type == Networking::EspNowEvent::MSG_SEND_COMPLETE)
       {
-        ESP_LOGD(TAG, "ESP-NOW event: TX completed. Checking to send data.");
+        ESP_LOGD(LOG_TAG, "ESP-NOW event: TX completed. Checking to send data.");
 
         const std::size_t bytes_waiting = s_uartBytesWaiting();
         if (s_uartBytesWaiting() >= 128)
@@ -89,13 +90,12 @@ std::size_t s_uartBytesWaiting()
       uart_event_t event;
       xQueueReceive(s_uart_queue, &event, 0);
 
-      ESP_LOGD(TAG, "UART event: %d", event.type);
+      ESP_LOGD(LOG_TAG, "UART event: %d, size: %u", event.type, event.size);
 
       if (event.type == UART_DATA)
       {
-        const std::size_t bytes_waiting = s_uartBytesWaiting();
-        if (s_uartBytesWaiting() >= 128)
-          s_sendUartData(bytes_waiting);
+        if (event.size >= 128)
+          s_sendUartData(event.size);
         else
           xTimerReset(s_timer, 0);
       }
@@ -105,6 +105,8 @@ std::size_t s_uartBytesWaiting()
 
 void s_cbListenTimeout(TimerHandle_t)
 {
+  ESP_LOGD(LOG_TAG, "s_cbListenTimeout invoked from timer.");
+
   const std::size_t bytes_waiting = s_uartBytesWaiting();
   if (bytes_waiting > 0)
     s_sendUartData(bytes_waiting);
@@ -116,11 +118,11 @@ extern "C" void app_main(void)
 {
   ESP_ERROR_CHECK(nvs_flash_init());
 
-  esp_log_level_set("*", ESP_LOG_INFO);
-  esp_log_level_set(TAG, ESP_LOG_DEBUG);
-  esp_log_level_set("Networking", ESP_LOG_DEBUG);
+  esp_log_level_set("*", esp_log_level_t(CONFIG_LOG_DEFAULT_LEVEL));
+  esp_log_level_set(LOG_TAG, Config::appLogLevel());
+  esp_log_level_set(Networking::LOG_TAG, Config::appLogLevel());
 
-  ESP_LOGD(TAG, "Starting main.");
+  ESP_LOGD(LOG_TAG, "Starting main.");
 
   Networking::setupWifi();
   s_esp_now_queue = Networking::setupEspNow();
@@ -132,6 +134,6 @@ extern "C" void app_main(void)
   xQueueAddToSet(s_esp_now_queue, s_queue_set);
   xQueueAddToSet(s_uart_queue, s_queue_set);
 
-  ESP_LOGI(TAG, "Setup completed.");
+  ESP_LOGI(LOG_TAG, "Setup completed.");
   xTaskCreate(s_mainTask, "main_task", 2048, nullptr, 4, &s_main_task);
 }