diff --git a/src/W800_SDK_v1.00.10/app/gfx/gfx_task.c b/src/W800_SDK_v1.00.10/app/gfx/gfx_task.c
index d783a85..8eb9494 100644
--- a/src/W800_SDK_v1.00.10/app/gfx/gfx_task.c
+++ b/src/W800_SDK_v1.00.10/app/gfx/gfx_task.c
@@ -11,6 +11,7 @@
 #include "watch_face.h"
 #include "menu_screen.h"
 #include "compass_screen.h"
+#include "altimeter_screen.h"
 #include "find_my_phone_screen.h"
 #include "music_player_screen.h"
 #include "settings_screen.h"
@@ -38,6 +39,7 @@ static void _perform_deferred_display_wake_up(uint8_t deferred_time_in_ms);
 WatchFace_t watchFace;
 MenuScreen_t menuScreen;
 CompassScreen_t compassScreen;
+AltimeterScreen_t altimeterScreen;
 FindMyPhoneScreen_t findMyPhoneScreen;
 MusicPlayerScreen_t musicPlayerScreen;
 NotificationScreen_t notificationScreen;
@@ -150,6 +152,7 @@ static void setTimeFormatCb(bool *hour_24H_format, SettingMode_e mode)
     else
     {
         watch_settings_time_and_date_set_hour_format(*hour_24H_format);
+        notification_screen_set_displayed_hour_format(&notificationScreen, *hour_24H_format);
     }
 }
 
@@ -644,6 +647,23 @@ static void settings_screen_on_state_change_cb(SettingsScreenState_e settingsScr
     }
 }
 
+static void altimeter_screen_on_state_change_cb(AltimeterScreenState_e altimeterScreenState)
+{
+    switch(altimeterScreenState)
+    {
+        case ALTIMETER_SCREEN_STATE_OPENED:
+            if(!watch_peripherals_pressure_sensor_select_profile(WATCH_PERIPHERALS_PRESSURE_SENSOR_PROFILE_HIGH_PRECISION))
+                APP_LOG_ERROR("Failed to change pressure sensor profile to high precision");
+            break;
+        case ALTIMETER_SCREEN_STATE_CLOSED:
+            if(!watch_peripherals_pressure_sensor_select_profile(WATCH_PERIPHERALS_PRESSURE_SENSOR_PROFILE_LOW_POWER))
+                APP_LOG_ERROR("Failed to change pressure sensor profile to low power");
+            break;
+        default:
+            break;
+    }
+}
+
 static float bmp_temperature = 0;
 
 static void compass_screen_azimuth_and_temperature_cb(uint16_t *azimuth, bool *refreshAzimuth, float *temperature, bool *refreshTemperature)
@@ -653,6 +673,23 @@ static void compass_screen_azimuth_and_temperature_cb(uint16_t *azimuth, bool *r
     *temperature = bmp_temperature;
 }
 
+#include "BMP280.h"
+
+static void altimeter_screen_measurement_cb(float * const temperature, float * const pressure, float * const altitude)
+{
+    float _pressure, _temperature;
+    
+    BMP280_trigger_measurement();
+    while(BMP280_is_measuring());
+    float _altitude = BMP280_get_altitude(0, &_pressure, &_temperature);
+
+    if(temperature)*temperature = _temperature;
+
+    if(pressure)*pressure = _pressure/100.0;
+
+    if(altitude)*altitude = _altitude;
+}
+
 static void sendFindMyPhoneBLECommandCb(bool findMyPhone)
 {
     gadget_bridge_send_find_phone(findMyPhone);
@@ -660,7 +697,7 @@ static void sendFindMyPhoneBLECommandCb(bool findMyPhone)
 
 static void sendMusicPlaybackBLECommandCb(MusicPlaybackCtrlAction_e musicPlaybackCtrlAction)
 {
-    gadget_bridge_send_music_control(musicPlaybackCtrlAction);
+    gadget_bridge_send_music_control((gadget_bridge_music_control_e) musicPlaybackCtrlAction);
 }
 
 static void notification_on_state_change_cb(NotificationState_e notificationState, uint32_t notification_handle)
@@ -676,7 +713,6 @@ static void notification_on_state_change_cb(NotificationState_e notificationStat
     case NOTIFICATION_STATE_CLEARED:
         // Let's restore MCU clocks to it's default
         watch_power_management_restore_default_cpu_clocks(true, true);
-
         // Don't forget to tell GadgetBridge that the notification was dismissed
         gadget_bridge_send_notification_action(GADGET_BRIDGE_NOTIFICATION_ACTION_DISMISS, notification_handle, NULL, NULL);
     default:
@@ -751,6 +787,11 @@ void gfx_task(void *param)
     compass_screen_register_on_state_change_cb(&compassScreen, &(compass_screen_on_state_change_cb));
     compass_screen_register_azimuth_and_temperature_cb(&compassScreen, &(compass_screen_azimuth_and_temperature_cb));
 
+    altimeter_screen_init(&altimeterScreen);
+    altimeter_screen_register_on_state_change_cb(&altimeterScreen, &(altimeter_screen_on_state_change_cb));
+    altimeter_screen_register_user_feedback_cb(&altimeterScreen, &(watch_peripherals_vibrate_on_item_click));
+    altimeter_screen_register_measurement_cb(&altimeterScreen, &(altimeter_screen_measurement_cb));
+
     find_my_phone_screen_init(&findMyPhoneScreen);
     find_my_phone_screen_register_BLE_command_send_cb(&findMyPhoneScreen, &(sendFindMyPhoneBLECommandCb));
 
@@ -760,6 +801,7 @@ void gfx_task(void *param)
     music_player_screen_register_user_feedback_cb(&musicPlayerScreen, &(watch_peripherals_vibrate_on_item_click));
 
     notification_screen_init(&notificationScreen);
+    notification_screen_set_displayed_hour_format(&notificationScreen, persistency_get_settings()->timeAndDate.time_and_date_hour_format);
     notification_screen_register_on_state_change_cb(&notificationScreen, &(notification_on_state_change_cb));
 
     settings_screen_init(&settingsScreen);
@@ -879,7 +921,7 @@ void gfx_task(void *param)
             _battery_stats.battery_percentage = battery_voltage_to_percentage(_battery_stats.battery_voltage);
             APP_LOG_DEBUG("GFX thread, temp : %0.2f °C, press : %0.2f hPa, battery(%s) : %u mV <-> %u %%",
                             bmp_temperature,
-                            pressure/100,
+                            pressure/100.0,
                             battery_controller_status_2_str(watch_peripherals_get_battery_controller_status()),
                             _battery_stats.battery_voltage,
                             _battery_stats.battery_percentage);