diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..60ad17c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "external/rtl_libs"]
+	path = external/rtl_libs
+	url = https://git.radiophotonics.ru/baulin.fa/rtl_libs.git
diff --git a/external/rtl_libs b/external/rtl_libs
new file mode 160000
index 0000000..8cadd5a
--- /dev/null
+++ b/external/rtl_libs
@@ -0,0 +1 @@
+Subproject commit 8cadd5a02fb0df036799a731667cc9af5118fbaa