diff --git a/scripts/build.sh b/scripts/build.sh
index 4e9327c..89504eb 100644
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -10,6 +10,7 @@ export SDKCONFIG_DEFAULTS=${PWD}/config/sdkconfig.defaults
 
 . ${IDF_PATH}/export.sh
 
+idf.py set-target esp32s3
 idf.py build
 
 # idk how to put it in the right place
diff --git a/src/App.cpp b/src/App.cpp
new file mode 100644
index 0000000..b8ebe65
--- /dev/null
+++ b/src/App.cpp
@@ -0,0 +1,31 @@
+
+#include "App.hpp"
+
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "sdkconfig.h"
+
+#include "pins.hpp"
+
+App::App() {
+    ESP_LOGI(TAG, "App constructor");
+}
+
+uint32_t App::main() {
+
+    ESP_LOGI(TAG, "Example configured to blink GPIO LED!");
+    gpio_reset_pin(gpio_onboardLed);
+    gpio_set_direction(gpio_onboardLed, GPIO_MODE_OUTPUT);
+
+    while (1) {
+        ESP_LOGI(TAG, "Turning the LED %s!", ledState == true ? "ON" : "OFF");
+        gpio_set_level(gpio_onboardLed, ledState);
+        /* Toggle the LED state */
+        ledState = !ledState;
+        vTaskDelay(blinkTime / portTICK_PERIOD_MS);
+    }
+
+    return 1; // unreachable
+}
diff --git a/src/App.hpp b/src/App.hpp
new file mode 100644
index 0000000..0e42fee
--- /dev/null
+++ b/src/App.hpp
@@ -0,0 +1,21 @@
+
+#pragma once
+
+#include<stdint.h>
+
+class App {
+
+public:
+
+    App();
+    ~App() = default;
+
+    uint32_t main();
+
+private:
+    
+    uint32_t ledState = 0;
+    uint32_t blinkTime = 250;
+    const char *TAG = "app";
+
+};
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9a2434a..14d5180 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,4 +6,4 @@ idf_component_register(
     PRIV_REQUIRES spi_flash
     REQUIRES esp_driver_gpio
     INCLUDE_DIRS "."
-)
\ No newline at end of file
+)
diff --git a/src/main.cpp b/src/main.cpp
index 3263601..1067fb3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -14,7 +14,7 @@ void app_main(void) {
     ESP_LOGI(TAG, "Program start");
 
     App app;
-    int8_t status = app.main();
+    int32_t status = app.main();
     ESP_LOGI(TAG, "App main returned status %d", status);
 }
 
diff --git a/src/pins.hpp b/src/pins.hpp
new file mode 100644
index 0000000..29a6dec
--- /dev/null
+++ b/src/pins.hpp
@@ -0,0 +1,34 @@
+
+#include "driver/gpio.h"
+
+// onboard led
+const gpio_num_t gpio_onboardLed = GPIO_NUM_2;
+
+// misc
+const gpio_num_t gpio_msdDetect  = GPIO_NUM_8;
+const gpio_num_t gpio_ws2812b    = GPIO_NUM_9;
+
+// i2c
+const gpio_num_t gpio_i2c_dout   = GPIO_NUM_11;
+const gpio_num_t gpio_i2c_din    = GPIO_NUM_12;
+
+// i2c expander interrupts
+const gpio_num_t gpio_i2c_intrA  = GPIO_NUM_14;
+const gpio_num_t gpio_i2c_intrB  = GPIO_NUM_13;
+
+// uart
+const gpio_num_t gpio_uart_rx    = (gpio_num_t)44; // should already be configured
+const gpio_num_t gpio_uart_tx    = (gpio_num_t)43; // should already be configured
+
+// seven segment display
+const gpio_num_t gpio_ssd_latch  = GPIO_NUM_17;
+const gpio_num_t gpio_ssd_clk    = GPIO_NUM_18;
+const gpio_num_t gpio_ssd_data   = GPIO_NUM_21;
+
+// i2s
+const gpio_num_t gpio_i2s_wsel   = GPIO_NUM_38;
+const gpio_num_t gpio_i2s_din    = GPIO_NUM_39;
+const gpio_num_t gpio_i2s_bck    = (gpio_num_t)40; // idk why it only goes up to 40
+const gpio_num_t gpio_i2s_mck    = (gpio_num_t)41;
+const gpio_num_t gpio_i2s_mute   = (gpio_num_t)42;
+const gpio_num_t gpio_i2s_shdn   = (gpio_num_t)45;