diff --git a/.gitignore b/.gitignore
index 4bd97ea..8f51eb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,4 @@ CMakeUserPresets.json
 build/
 build.sh
 .vscode/
+sdkconfig*
\ No newline at end of file
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 120aaf0..3d71418 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -66,7 +66,7 @@ if(CONFIG_IDF_TARGET_ARCH_RISCV)
     # generic
     set(C3_TARGET "elf-riscv32")
 elseif(CONFIG_IDF_TARGET_ARCH_XTENSA)
-    # esp32 (default)
+    # generic
     set(C3_TARGET "elf-xtensa")
 else()
     message(FATAL_ERROR "Unsupported target ${CONFIG_IDF_TARGET}")
@@ -88,6 +88,9 @@ add_custom_target(c3_build
     static-lib
     -o libc3
     app.c3
+    wrappers/newlib.c3
+    wrappers/idf.c3
+    --single-module=yes
     --output-dir ${CMAKE_BINARY_DIR}/lib
     ${C3_BUILD_TYPE}
     --target ${C3_TARGET}
diff --git a/main/app.c3 b/main/app.c3
index ed10def..58a83c3 100644
--- a/main/app.c3
+++ b/main/app.c3
@@ -1,6 +1,17 @@
-extern fn int printf(char* format, ...);
+import newlib;
+import idf;
 
-fn void app_main() @export("app_main")
+fn void main() @export("app_main")
 {
-	printf("Hello, world from C3!\n");
+	newlib::printf("Hello, world from C3!\nIDF version: %s\n", idf::esp_get_idf_version());
+	
+	defer idf::heap_caps_dump_all();
+	
+	newlib::printf("Malloc test:\n");
+	void* ptr = idf::heap_caps_malloc(100, idf::MALLOC_CAP_DMA);
+	newlib::printf("Allocated 100 bytes at %p\n", ptr);
+	idf::heap_caps_free(ptr);
+	newlib::printf("Freeing memory...\n");
+	
+	newlib::printf("Malloc dump all\n");
 }
diff --git a/main/wrappers/idf.c3 b/main/wrappers/idf.c3
new file mode 100644
index 0000000..f0acf19
--- /dev/null
+++ b/main/wrappers/idf.c3
@@ -0,0 +1,69 @@
+module idf;
+
+def Esp_err_t = int;
+def Caps = isz;
+
+// Error codes
+const Esp_err_t ESP_OK = 0;
+const Esp_err_t ESP_FAIL = -1;
+const Esp_err_t ESP_ERR_NO_MEM = 0x101;
+const Esp_err_t ESP_ERR_INVALID_ARG = 0x102;
+const Esp_err_t ESP_ERR_INVALID_STATE = 0x103;
+const Esp_err_t ESP_ERR_INVALID_SIZE = 0x104;
+const Esp_err_t ESP_ERR_NOT_FOUND = 0x105;
+const Esp_err_t ESP_ERR_NOT_SUPPORTED = 0x106;
+const Esp_err_t ESP_ERR_TIMEOUT = 0x107;
+const Esp_err_t ESP_ERR_INVALID_RESPONSE = 0x108;
+const Esp_err_t ESP_ERR_INVALID_CRC = 0x109;
+const Esp_err_t ESP_ERR_INVALID_VERSION = 0x10A;
+const Esp_err_t ESP_ERR_INVALID_MAC = 0x10B;
+const Esp_err_t ESP_ERR_NOT_FINISHED = 0x10C;
+const Esp_err_t ESP_ERR_NOT_ALLOWED = 0x10D;
+const Esp_err_t ESP_ERR_WIFI_BASE = 0x3000;
+const Esp_err_t ESP_ERR_MESH_BASE = 0x4000;
+const Esp_err_t ESP_ERR_FLASH_BASE = 0x6000;
+const Esp_err_t ESP_ERR_HW_CRYPTO_BASE = 0xc000;
+const Esp_err_t ESP_ERR_MEMPROT_BASE = 0xd000;
+
+const Caps MALLOC_CAP_EXEC = (1 << 0);          //< Memory must be able to run executable code
+const Caps MALLOC_CAP_32BIT = (1 << 1);         //< Memory must allow for aligned 32-bit data accesses
+const Caps MALLOC_CAP_8BIT = (1 << 2);          //< Memory must allow for 8/16/...-bit data accesses
+const Caps MALLOC_CAP_DMA = (1 << 3);           //< Memory must be able to accessed by DMA
+const Caps MALLOC_CAP_PID2 = (1 << 4);          //< Memory must be mapped to PID2 memory space (PIDs are not currently used)
+const Caps MALLOC_CAP_PID3 = (1 << 5);          //< Memory must be mapped to PID3 memory space (PIDs are not currently used)
+const Caps MALLOC_CAP_PID4 = (1 << 6);          //< Memory must be mapped to PID4 memory space (PIDs are not currently used)
+const Caps MALLOC_CAP_PID5 = (1 << 7);          //< Memory must be mapped to PID5 memory space (PIDs are not currently used)
+const Caps MALLOC_CAP_PID6 = (1 << 8);          //< Memory must be mapped to PID6 memory space (PIDs are not currently used)
+const Caps MALLOC_CAP_PID7 = (1 << 9);          //< Memory must be mapped to PID7 memory space (PIDs are not currently used)
+const Caps MALLOC_CAP_SPIRAM = (1 << 10);       //< Memory must be in SPI RAM
+const Caps MALLOC_CAP_INTERNAL = (1 << 11);     //< Memory must be internal; specifically it should not disappear when flash/spiram cache is switched off
+const Caps MALLOC_CAP_DEFAULT = (1 << 12);      //< Memory can be returned in a non-capability-specific memory allocation (e.g. malloc(), calloc()) call
+const Caps MALLOC_CAP_IRAM_8BIT = (1 << 13);    //< Memory must be in IRAM and allow unaligned access
+const Caps MALLOC_CAP_RETENTION = (1 << 14);    //< Memory must be able to accessed by retention DMA
+const Caps MALLOC_CAP_RTCRAM = (1 << 15);       //< Memory must be in RTC fast memory
+const Caps MALLOC_CAP_TCM = (1 << 16);          //< Memory must be in TCM memory
+const Caps MALLOC_CAP_INVALID = (1 << 31);      //< Memory can't be used / list end marker
+
+// Functions
+extern fn char* esp_err_to_name(Esp_err_t err_code);
+extern fn char* esp_err_to_name_r(Esp_err_t err_code, char* buf, usz buflen);
+extern fn void _esp_error_check_failed(Esp_err_t err_code, char* file, int line, char* function, char* expression);
+extern fn void _esp_error_check_failed_without_abort(Esp_err_t err_code, char* file, int line, char* function, char* expression);
+extern fn char* esp_get_idf_version();
+
+extern fn void* heap_caps_malloc(usz size, uint caps);
+extern fn void heap_caps_free(void* ptr);
+extern fn void* heap_caps_realloc(void* ptr, usz size, uint caps);
+extern fn void* heap_caps_aligned_alloc(usz alignment, usz size, uint caps);
+extern fn void heap_caps_aligned_free(void* ptr);
+extern fn void* heap_caps_aligned_calloc(usz alignment, usz n, usz size, uint caps);
+extern fn void* heap_caps_calloc(usz n, usz size, uint caps);
+extern fn usz heap_caps_get_total_size(uint caps);
+extern fn usz heap_caps_get_free_size(uint caps);
+extern fn usz heap_caps_get_minimum_free_size(uint caps);
+extern fn usz heap_caps_get_largest_free_block(uint caps);
+extern fn Esp_err_t heap_caps_monitor_local_minimum_free_size_start();
+extern fn Esp_err_t heap_caps_monitor_local_minimum_free_size_stop();
+extern fn void heap_caps_dump(Caps caps);
+extern fn void heap_caps_dump_all();
+extern fn usz heap_caps_get_allocated_size(void* ptr);
\ No newline at end of file
diff --git a/main/wrappers/newlib.c3 b/main/wrappers/newlib.c3
new file mode 100644
index 0000000..3cb2e81
--- /dev/null
+++ b/main/wrappers/newlib.c3
@@ -0,0 +1,3 @@
+module newlib;
+
+extern fn int printf(char* format, ...);
\ No newline at end of file