diff --git a/z_server/devices/__init__.py b/z_server/devices/__init__.py
index bc8c413..8355af6 100644
--- a/z_server/devices/__init__.py
+++ b/z_server/devices/__init__.py
@@ -169,7 +169,8 @@ class tradfri_sw_br_ct(base):
 
 
 class tradfri_button(base):
-    pass
+    LAST_MSG_WARNING = 15 * 60 * 60
+    LAST_MSG_ERROR = 24 * 60 * 60
 
 
 class livarno_sw_br_ct(base):