diff --git a/doorcmds.h b/doorcmds.h
new file mode 100644
index 0000000..facec53
--- /dev/null
+++ b/doorcmds.h
@@ -0,0 +1,14 @@
+#ifndef DOORCMD_H
+#define DOORCMD_H
+
+#define DOOR_CMD_UNLOCK   'u'
+#define DOOR_CMD_LOCK     'l'
+#define DOOR_CMD_SCHNAPER 's'
+#define DOOR_CMD_PING     'p'
+#define DOOR_CMD_STATUS   'i'
+
+#define DOOR_BUTTON_UNLOCK    'U'
+#define DOOR_BUTTON_LOCK      'L'
+#define DOOR_EMERGENCY_UNLOCK 'E'
+
+#endif