diff --git a/README.md b/README.md
index 468fdb9..ebef416 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,12 @@ Both ethernet and USB are supported.
 
 It can be used both as a library and as a CLI program.
 
+## Status
+
+Serial: seems to work. No production use yet.
+
+TCP: untested, might need fixes.
+
 ## CLI examples
 
 ### Read variable value