diff --git a/.gitignore b/.gitignore
index bf4fc60..76ecbb1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ bin/
 *.list
 generated.*.ld
 .idea
+build
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..cfcea58
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 3.19)
+project(dht_test LANGUAGES C)
+
+set(LIBOPENCM3_DIR ${CMAKE_SOURCE_DIR}/libopencm3)
+set(CMAKE_C_STANDARD 99)
+
+add_compile_options(
+        -Wall
+        -Wextra
+        -Wconversion
+        -Wsign-conversion
+        -ggdb3
+        -Os
+)
+
+add_compile_definitions(
+        STM32F1
+        DEBUG
+)
+
+add_executable(dht_test main.c)
+
+set_target_properties(dht_test PROPERTIES
+        SUFFIX .elf
+)
+
+target_include_directories(dht_test PRIVATE
+        ${LIBOPENCM3_DIR}/include
+        RTT
+)
+
+add_custom_target(libopencm3 make TARGETS=stm32/f1 -j8 WORKING_DIRECTORY ${LIBOPENCM3_DIR})
+link_directories(${LIBOPENCM3_DIR}/lib)
diff --git a/CMakePresets.json b/CMakePresets.json
new file mode 100644
index 0000000..447105c
--- /dev/null
+++ b/CMakePresets.json
@@ -0,0 +1,23 @@
+{
+  "version": 2,
+  "cmakeMinimumRequired": {
+    "major": 3,
+    "minor": 19,
+    "patch": 0
+  },
+  "configurePresets": [
+    {
+      "name": "default",
+      "displayName": "Default Config",
+      "description": "Default build using Ninja generator",
+      "generator": "Ninja",
+      "binaryDir": "${sourceDir}/build/default"
+    }
+  ],
+  "buildPresets": [
+    {
+      "name": "default",
+      "configurePreset": "default"
+    }
+  ]
+}
diff --git a/Makefile b/Makefile.old
similarity index 100%
rename from Makefile
rename to Makefile.old
diff --git a/print_vars.mk b/print_vars.mk
new file mode 100644
index 0000000..f8bd211
--- /dev/null
+++ b/print_vars.mk
@@ -0,0 +1,19 @@
+
+PROJECT=dht_test
+DEVICE=STM32F103C8T6
+OPENCM3_DIR=libopencm3
+
+
+print_genlink_vars:
+	@echo LDSCRIPT=$(LDSCRIPT)
+	@echo LDFLAGS=$(LDFLAGS)
+	@echo LIBDEPS=$(LIBDEPS)
+	@echo ARCH_FLAGS=$(ARCH_FLAGS)
+	@echo TGT_CFLAGS=$(TGT_CFLAGS)
+	@echo TGT_LDFLAGS=$(TGT_LDFLAGS)
+	@echo LDLIBS=$(LDLIBS)
+
+
+include $(OPENCM3_DIR)/mk/genlink-config.mk
+include rules.mk
+include $(OPENCM3_DIR)/mk/genlink-rules.mk
diff --git a/toolchain-STM32F1.cmake b/toolchain-STM32F1.cmake
new file mode 100644
index 0000000..6153b0d
--- /dev/null
+++ b/toolchain-STM32F1.cmake
@@ -0,0 +1,34 @@
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_VERSION Cortex-M3-STM32F1)
+
+set(CMAKE_C_COMPILER arm-none-eabi-gcc)
+set(CMAKE_CXX_COMPILER arm-none-eabi-g++)
+
+
+set(ARM_OPTIONS -mcpu=cortex-m4 -mfloat-abi=soft --specs=nano.specs)
+
+add_compile_options(
+        ${ARM_OPTIONS}
+        -fmessage-length=0
+        -funsigned-char
+        -ffunction-sections
+        -fdata-sections
+        -MMD
+        -MP
+)
+
+
+add_link_options(
+        ${ARM_OPTIONS}
+        --specs=rdimon.specs
+        -u_printf_float
+        -u_scanf_float
+        -nostartfiles
+        LINKER:--gc-sections
+        LINKER:--build-id
+)
+
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)