diff --git a/stm-firmware/.gitignore b/stm-firmware/.gitignore
index bcb7a46..3258d04 100644
--- a/stm-firmware/.gitignore
+++ b/stm-firmware/.gitignore
@@ -16,3 +16,10 @@ reflow-controller.includes
 *.files
 *.user.*
 *.user
+
+# VSCODE and CLANGD sepcific excludes
+
+.vscode/
+build/
+.cache/
+compile_commands.json
diff --git a/stm-firmware/CMakeLists.txt b/stm-firmware/CMakeLists.txt
index 04f5a23..164ee2f 100644
--- a/stm-firmware/CMakeLists.txt
+++ b/stm-firmware/CMakeLists.txt
@@ -1,7 +1,7 @@
 set(CMAKE_SYSTEM_NAME Generic)
 set(CMAKE_SYSTEM_PROCESSOR arm)
 set(CMAKE_CROSSCOMPILING 1)
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.18)
 
 set(CMAKE_TOOLCHAIN_FILE "arm-none-eabi-gcc.cmake")
 
@@ -43,26 +43,12 @@ else (GIT_FOUND)
 	message("Version is set to: ${GIT_DESCRIBE}${ColorReset}")
 endif (GIT_FOUND)
 
-find_program(VIRTUALENV virtualenv)
-if (VIRTUALENV)
-	message("Python virtual environment found")
-	execute_process(
-		COMMAND ${VIRTUALENV} venv
-		WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-		OUTPUT_QUIET
-		COMMAND_ERROR_IS_FATAL ANY
-	)
-	set(VENV_BIN "${CMAKE_CURRENT_BINARY_DIR}/venv/bin")
-	execute_process(
-		COMMAND ./pip install -r "${CMAKE_CURRENT_SOURCE_DIR}/crc-patcher/requirements.txt"
-		WORKING_DIRECTORY ${VENV_BIN}
-		OUTPUT_QUIET
-		COMMAND_ERROR_IS_FATAL ANY
-	)
-	message("${BoldGreen}python virtual environment set up!${ColorReset}")
-else(VIRTUALENV)
-	message(FATAL_ERROR "${BoldRed}Python virtual environment not set up: virtualenv: command not found!${ColorReset}")
-endif (VIRTUALENV)
+find_program(PATCHELFCRC patchelfcrc)
+if (PATCHELFCRC)
+	message("patchelfcrc found: ${PATCHELFCRC}")
+else(PATCHELFCRC)
+	message(FATAL_ERROR "${BoldRed}Patchelfcrc not found. Cannot patch CRC checksum into ELF file: patchelfcrc: command not found! See: https://git.shimatta.de/mhu/patchelfcrc${ColorReset}")
+endif (PATCHELFCRC)
 
 
 set(ELFFILE ${PROJECT_NAME}.elf)
@@ -71,7 +57,7 @@ set(MAPFILE ${PROJECT_NAME}.map)
 set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/stm32f407vet6_flash.ld)
 
 add_compile_options(-Wall -Wextra -Wold-style-declaration -Wuninitialized -Wmaybe-uninitialized -Wunused-parameter)
-add_compile_options(-mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 -nostartfiles -Wimplicit-fallthrough=3 -Wsign-compare)
+add_compile_options(-mlittle-endian -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -nostartfiles -Wimplicit-fallthrough=3 -Wsign-compare)
 
 
 set(GIT_DESCRIBE "${GIT_DESCRIBE}")
@@ -124,15 +110,15 @@ add_executable(${ELFFILE} ${MAIN_SOURCES} ${CFG_PARSER_SRCS} ${UI_SRCS}
 add_dependencies(${ELFFILE} updater-ram-code-header-blob)		
 
 target_include_directories(${ELFFILE} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/shellmatta/api ${CMAKE_CURRENT_SOURCE_DIR}/config-parser/include)
-target_link_options(${ELFFILE} PRIVATE -mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 --disable-newlib-supplied-syscalls -nostartfiles -T${LINKER_SCRIPT} -Wl,--print-memory-usage)
+target_link_options(${ELFFILE} PRIVATE -mlittle-endian -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 --disable-newlib-supplied-syscalls -nostartfiles -T${LINKER_SCRIPT} -Wl,--print-memory-usage)
 target_link_libraries(${ELFFILE} base64-lib linklist-lib)
 target_include_directories(${ELFFILE} PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/updater/ram-code/include/")
 
 add_custom_command(
     TARGET ${ELFFILE}
     POST_BUILD
-    COMMAND ./python "${CMAKE_CURRENT_SOURCE_DIR}/crc-patcher/crc_patch_elf.py" "${CMAKE_CURRENT_BINARY_DIR}/${ELFFILE}"
-    WORKING_DIRECTORY ${VENV_BIN}
+    COMMAND ${PATCHELFCRC} --little-endian --verbose --granularity word --start-magic 0xa8be53f9 --end-magic 0xffa582ff -O .flashcrc -p crc-32-mpeg -S .text -S .data -S .ccmdata -S .vectors "${CMAKE_CURRENT_BINARY_DIR}/${ELFFILE}"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     COMMENT "Running Flash CRC Patcher"
     )