diff --git a/examples/esp32/CMakeLists.txt b/examples/esp32/CMakeLists.txt
index b9d85a30..855decfc 100644
--- a/examples/esp32/CMakeLists.txt
+++ b/examples/esp32/CMakeLists.txt
@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.13)
 set(CMAKE_C_STANDARD 17)
 set(CMAKE_CXX_STANDARD 17)
 
-set(EXTRA_COMPONENT_DIRS ../../src/components)
+set(BLUEPAD32_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../..)
+set(EXTRA_COMPONENT_DIRS ${BLUEPAD32_ROOT}/src/components)
+
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(bluepad32_esp32_example_app)
diff --git a/examples/linux/CMakeLists.txt b/examples/linux/CMakeLists.txt
index 101511d8..b601d88d 100644
--- a/examples/linux/CMakeLists.txt
+++ b/examples/linux/CMakeLists.txt
@@ -5,7 +5,8 @@ set(CMAKE_C_STANDARD 17)
 
 project(bluepad32_linux_example_app C ASM)
 
-set(BLUEPAD32_ROOT "../..")
+set(BLUEPAD32_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../..)
+
 # To use it from Bluepad32 (up-to-date, with custom patches for controllers):
 set(BTSTACK_ROOT ${BLUEPAD32_ROOT}/external/btstack)
 
diff --git a/examples/pico_w/CMakeLists.txt b/examples/pico_w/CMakeLists.txt
index a7d6de96..b00cb75c 100644
--- a/examples/pico_w/CMakeLists.txt
+++ b/examples/pico_w/CMakeLists.txt
@@ -7,7 +7,7 @@ else()
     set(PICO_BOARD "pico_w")
 endif()
 
-set(BLUEPAD32_ROOT ../..)
+set(BLUEPAD32_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../..)
 
 # initialize the SDK based on PICO_SDK_PATH
 # note: this must happen before project()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 72a109da..2e2e5684 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,4 +5,4 @@ set(CMAKE_C_STANDARD 17)
 set(CMAKE_CXX_STANDARD 17)
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
-project(bluepad32-app)
+project(bluepad32-app)
\ No newline at end of file
diff --git a/src/components/bluepad32/CMakeLists.txt b/src/components/bluepad32/CMakeLists.txt
index 4bbddf2b..3daa4330 100644
--- a/src/components/bluepad32/CMakeLists.txt
+++ b/src/components/bluepad32/CMakeLists.txt
@@ -1,3 +1,15 @@
+include(CMakePrintHelpers)
+
+if (NOT DEFINED BLUEPAD32_ROOT)
+    set (BLUEPAD32_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../../..)
+    message(WARNING "BLUEPAD32_ROOT not set. Setting to ${BLUEPAD32_ROOT}")
+endif()
+
+if (NOT DEFINED BTSTACK_ROOT)
+    set (BTSTACK_ROOT ${BLUEPAD32_ROOT}/external/btstack)
+    message(WARNING "BTSTACK_ROOT not set. Setting to ${BTSTACK_ROOT}")
+endif()
+
 set(srcs
          "bt/uni_bt.c"
          "bt/uni_bt_allowlist.c"
@@ -95,6 +107,33 @@ if(CONFIG_IDF_TARGET_ESP32)
          "platform/uni_platform_unijoysticle_singleport.c")
 endif()
 
+# BLE Service
+# to generate .h from .gatt files
+if(NOT CMAKE_BUILD_EARLY_EXPANSION)
+    # CMAKE_BUILD_EARLY_EXPANSION needed in ESP32 to prevent command is not scriptable.
+    # See: https://esp32.com/viewtopic.php?t=29402
+    find_package (Python REQUIRED COMPONENTS Interpreter)
+    include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+    set(GATT_FILES
+            "uni_bt_service.gatt")
+
+    cmake_print_variables(GATT_FILES)
+    cmake_print_variables(BLUEPAD32_ROOT)
+    cmake_print_variables(BTSTACK_ROOT)
+    foreach(GATT_FILE ${GATT_FILES})
+            message("Generating GATT DB file")
+            cmake_print_variables(GATT_FILE)
+            add_custom_command(
+                    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${GATT_FILE}.h
+                    DEPENDS bt/${GATT_FILE}
+                    COMMAND ${Python_EXECUTABLE}
+                    ARGS ${BTSTACK_ROOT}/tool/compile_gatt.py ${CMAKE_CURRENT_SOURCE_DIR}/bt/${GATT_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${GATT_FILE}.h
+            )
+            list(APPEND srcs ${CMAKE_CURRENT_BINARY_DIR}/${GATT_FILE}.h)
+    endforeach(GATT_FILE)
+endif()
+
 # Valid for ESP-IDF only
 if(IDF_TARGET)
     set(requires "nvs_flash" "btstack" "app_update" "esp_timer")
diff --git a/src/components/bluepad32/bt/uni_bt_service.c b/src/components/bluepad32/bt/uni_bt_service.c
index 48d34724..06f4bb1f 100644
--- a/src/components/bluepad32/bt/uni_bt_service.c
+++ b/src/components/bluepad32/bt/uni_bt_service.c
@@ -4,6 +4,8 @@
 
 #include "bt/uni_bt_service.h"
 
+#include "uni_bt_service.gatt.h"
+
 static bool service_enabled;
 
 void uni_bt_service_init(void) {}
diff --git a/src/components/bluepad32/bt/uni_bt_service.gatt b/src/components/bluepad32/bt/uni_bt_service.gatt
new file mode 100644
index 00000000..55ff295c
--- /dev/null
+++ b/src/components/bluepad32/bt/uni_bt_service.gatt
@@ -0,0 +1,14 @@
+PRIMARY_SERVICE, GAP_SERVICE
+CHARACTERISTIC, GAP_DEVICE_NAME, READ, "LE Streamer"
+
+PRIMARY_SERVICE, GATT_SERVICE
+CHARACTERISTIC, GATT_DATABASE_HASH, READ,
+
+// Test Service
+PRIMARY_SERVICE, 0000FF10-0000-1000-8000-00805F9B34FB
+// Test Characteristic A, write_without_response as well as notify
+CHARACTERISTIC,  0000FF11-0000-1000-8000-00805F9B34FB, WRITE_WITHOUT_RESPONSE | NOTIFY | DYNAMIC,
+// Test Characteristic B, write_without_response as well as notify
+CHARACTERISTIC,  0000FF12-0000-1000-8000-00805F9B34FB, WRITE_WITHOUT_RESPONSE | NOTIFY | DYNAMIC,
+
+
diff --git a/src/main/CMakeLists.txt b/src/main/CMakeLists.txt
index 1737fd16..e6c578a0 100644
--- a/src/main/CMakeLists.txt
+++ b/src/main/CMakeLists.txt
@@ -10,4 +10,4 @@ endif()
 
 idf_component_register(SRCS "${srcs}"
                     INCLUDE_DIRS "."
-                    REQUIRES "${requires}")
+                    REQUIRES "${requires}")
\ No newline at end of file