diff --git a/README.md b/README.md
index e84b8dd43a24bc1ce41031694e43912d06b37e65..4e9206dd4294b356e5bf2b1b4e21e8293eeccb59 100644
--- a/README.md
+++ b/README.md
@@ -28,4 +28,5 @@ A valid configuration needs:
 
 - at least one appliance
 - at least one sensor
-- every sensor to be associated with an appliance
\ No newline at end of file
+- every sensor to be associated with an appliance
+- an I2C adress between 8 and 119 which is not dividable by 4 but by 2