diff --git a/extmod/extmod.cmake b/extmod/extmod.cmake
index 9c05237774..adaa04f131 100644
--- a/extmod/extmod.cmake
+++ b/extmod/extmod.cmake
@@ -97,3 +97,97 @@ if(EXISTS "${MICROPY_LIB_BERKELEY_DIR}/btree/bt_close.c")
         "virt_fd_t=void*"
     )
 endif()
+
+# Library for mbedtls
+
+set(MICROPY_LIB_MBEDTLS_DIR "${MICROPY_DIR}/lib/mbedtls")
+
+if(EXISTS "${MICROPY_LIB_MBEDTLS_DIR}/library/aes.c")
+    add_library(micropy_lib_mbedtls INTERFACE)
+
+    target_include_directories(micropy_lib_mbedtls INTERFACE
+        ${MICROPY_LIB_MBEDTLS_DIR}/include
+    )
+
+    target_sources(micropy_lib_mbedtls INTERFACE
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/aes.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/aesni.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/arc4.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/asn1parse.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/asn1write.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/base64.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/bignum.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/blowfish.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/camellia.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ccm.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/certs.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/chacha20.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/chachapoly.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/cipher.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/cipher_wrap.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/cmac.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ctr_drbg.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/debug.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/des.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/dhm.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ecdh.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ecdsa.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ecjpake.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ecp.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ecp_curves.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/entropy.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/entropy_poll.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/error.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/gcm.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/havege.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/hmac_drbg.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/md2.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/md4.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/md5.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/md.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/md_wrap.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/oid.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/padlock.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pem.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pk.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pkcs11.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pkcs12.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pkcs5.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pkparse.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pk_wrap.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/pkwrite.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/platform.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/platform_util.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/poly1305.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ripemd160.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/rsa.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/rsa_internal.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/sha1.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/sha256.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/sha512.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_cache.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_ciphersuites.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_cli.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_cookie.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_srv.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_ticket.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/ssl_tls.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/timing.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509_create.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509_crl.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509_crt.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509_csr.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509write_crt.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/x509write_csr.c
+        ${MICROPY_LIB_MBEDTLS_DIR}/library/xtea.c
+    )
+
+    target_compile_definitions(micropy_lib_mbedtls INTERFACE
+        MBEDTLS_CONFIG_FILE="ports/stm32/mbedtls/mbedtls_config.h"
+    )
+
+    list(APPEND MICROPY_INC_CORE
+        "${MICROPY_LIB_MBEDTLS_DIR}/include"
+    )
+endif()