diff --git a/.gitmodules b/.gitmodules
index 2c2e40a..cd0c6fd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "lib/zh_avr_i2c"]
 	path = lib/zh_avr_i2c
 	url = http://git.zh.com.ru/avr_libraries/zh_avr_i2c
+[submodule "lib/zh_avr_common"]
+	path = lib/zh_avr_common
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_common
diff --git a/lib/zh_avr_common b/lib/zh_avr_common
new file mode 160000
index 0000000..9f03e86
--- /dev/null
+++ b/lib/zh_avr_common
@@ -0,0 +1 @@
+Subproject commit 9f03e866c19485fe037b3d6421a838cce7fc9efc