diff --git a/tools/rpi/hoymiles/decoders/__init__.py b/tools/rpi/hoymiles/decoders/__init__.py
index 6a10be07..0555808c 100644
--- a/tools/rpi/hoymiles/decoders/__init__.py
+++ b/tools/rpi/hoymiles/decoders/__init__.py
@@ -287,6 +287,7 @@ class EventsResponse(UnknownResponse):
             220: 'PV-3 Input undervoltage', # 0xDC
             221: 'PV-4 Input overvoltage', # 0xDD
             222: 'PV-4 Input undervoltage', # 0xDE
+            223: 'Grid connection attempt failed', #0xDF
             301: 'Hardware error code 301', # 0x012D
             302: 'Hardware error code 302', # 0x012E
             303: 'Hardware error code 303', # 0x012F